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• Why does my root filesystem keep becoming read-only?

  - by Scott Severance

  I've lately been having an issue with my root filesystem becoming readonly. It happens some amount of time after boot. I don't know exactly when it happens, as I don't usually notice it until something such as suspending the computer or printing fails. It seems to be fairly random. Since most of my system is on that partition, I can't re-mount it without rebooting. After this happens, the system runs a fsck. Sometimes it prompts to fix problems; other times it apparently finds none. To troubleshoot, I've searched through the logs but found nothing relevant. This might be due in part to not knowing when the actual errors took place. The filesystem is apparently good to begin with, as when fsck runs its fixes it doesn't report any errors. I've scanned the disk with SpinRite. A while ago, SpinRite found and recovered from some bad sectors on the hard drive. I ran a level 4 scan (a thorough scan) after this probem appeared, but SpinRite found nothing. The SMART data reports that the disk is OK with 63 bad sectors. The number of bad sectors hasn't changed recently. I realize that the disk isn't in the best of conditions, and I have complete backups in case of catastrophic failure. Yet the lack of errors in the logs, combined with SpinRite's test results and the unchanged SMART data makes me think that this problem has some cause other than disk failure. Other than disk failure, what could cause my symptoms?

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• Share home directory between Linux and Windows dual boot

  - by user877329

  This question is somewhat similar to How to use Windows Share has home directory, but in this case Windows is not running. I have installed a dual-boot configuration with Ubuntu 12.04 and Windows. My Windows partition is mounted on /C. Now I want either Ubuntu to locate home directories in /C/Users Which is the location of windows accounts or I want Windows to use D:\home for home directories. (D is the name of the Ubuntu root directory). For the first approach, I have managed to create a test user account test-user:x:1004:1001:Test:/C/Users/test-user:/bin/bash The account works but test-user cannot run any X session. From .xsession-errors chmod: Changing rights on ”/C/Users/test-user/.xsession-errors”: Operation not permitted Would it help get rid of that chmod, which has no effect? How do I? If I use the second approach, I need the Ext2fsd driver, which seems to work, but I am not sure if Windows maps the Ext2 system that early. Here is my fstab proc /proc proc nodev,noexec,nosuid 0 0 UUID=e7cef061-ed8d-4a82-b708-0c8f4c6f297f / ext3 errors=remount-ro 0 1 UUID=2CDCEB43DCEB0644 /C ntfs defaults,umask=007,gid=46 0 0 UUID=b087b5c0-b4bd-47e7-8d34-48ad9b192328 none swap sw 0 0 Update: I found something here: http://www.tuxera.com/community/ntfs-3g-advanced/ Will work if i do a correct mapping between NT users and Linux users.

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• Floating point undesirable in highly critical code?

  - by Kirt Undercoffer

  Question 11 in the Software Quality section of "IEEE Computer Society Real-World Software Engineering Problems", Naveda, Seidman, lists fp computation as undesirable because "the accuracy of the computations cannot be guaranteed". This is in the context of computing acceleration for an emergency braking system for a high speed train. This thinking seems to be invoking possible errors in small differences between measurements of a moving object but small differences at slow speeds aren't a problem (or shouldn't be), small differences between two measurements at high speed are irrelevant - can there be a problem with small roundoff errors during deceleration for an emergency braking system? This problem has been observed with airplane braking systems resulting in hydroplaning but could this actually happen in the context of a high speed train? The concern about fp errors seems to not be well-founded in this context. Any insight? The fp is used for acceleration so perhaps the concern is inching over a speed limit? But fp should be just fine if they use a double in whatever implementation language. The actual problem in the text states: During the inspection of the code for the emergency braking system of a new high speed train (a highly critical, real-time application), the review team identifies several characteristics of the code. Which of these characteristics are generally viewed as undesirable? The code contains three recursive functions (well that one is obvious). The computation of acceleration uses floating point arithmetic. All other computations use integer arithmetic. The code contains one linked list that uses dynamic memory allocation (second obvious problem). All inputs are checked to determine that they are within expected bounds before they are used.

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• Enabling GTX 570

  - by Silas

  Hello i just built up my new system: Asus Rock Z77 Extreme 4 Intel i7 3770k 16 Gb Corsair Ram Zotac Nvidia GTX 570 bequiet! 630W Power supply 120 GB SSD So after i installed UBUNTU 12.04 64 bit. It ran smoothly. I downloaded and installed all the recommended updates. After checking the Sytem details the GTX 570 didnt show up as graphics unit. so i figured i needed to download the drivers. So i did but being a complete newbie to linux i didnt succeed in installing them. (I think) Anyway after several tries and errors i shut down the PC and restarted it. Resultung in do Signal to my screen after trying to reboot and all the monitor outs with no result i took out the graphic card and now it boots normally but after booting it says there is a problem with the system the graphics cant be recognized something something. So Question A: What do i do? I Like linux but the arbitrarity of the Errors that occur without any changes to the system scare me. Question B: Is there A beginners guide to Ubuntu where i could start from scratch because i really want this to work? Question C: Now that the System is (suddently) showing these graphic errors So far without visible consequence despite the error message. should i reinstall the GPU and give the driver installation another try or the other way around? Ill be very grateful for any help. Thank you in advance!

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• Warning and error information in stored procedures revisited

  - by user13334359

  Originally way to handle warnings and errors in MySQL stored routine was designed as follows: if warning was generated during stored routine execution which has a handler for such a warning/error, MySQL remembered the handler, ignored the warning and continued execution after routine is executed MySQL checked if there is a remembered handler and activated if any This logic was not ideal and causes several problems, particularly: it was not possible to choose right handler for an instruction which generated several warnings or errors, because only first one was chosen handling conditions in current scope messed with conditions in different there were no generated warning/errors in Diagnostic Area that is against SQL Standard. First try to fix this was done in version 5.5. Patch left Diagnostic Area intact after stored routine execution, but cleared it in the beginning of each statement which can generate warnings or to work with tables. Diagnostic Area checked after stored routine execution.This patch solved issue with order of condition handlers, but lead to new issues. Most popular was that outer stored routine could see warnings which should be already handled by handler inside inner stored routine, although latest has handler. I even had to wrote a blog post about it.And now I am happy to announce this behaviour changed third time.Since version 5.6 Diagnostic Area cleared after instruction leaves its handler.This lead to that only one handler will see condition it is supposed to proceed and in proper order. All past problems are solved.I am happy that my old blog post describing weird behaviour in version 5.5 is not true any more.

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• Install Problems on ASUS X401A Notebook

  - by tired_of_trying

  okay... I tried many approaches to install Ubuntu 12.xxx on my new Asus notebook with varying degrees of failure... First: I'm not a newbie but I'm as frustrated as one! Install background: Install from USB DVD drive: The install went well. Re-booted machine. choose ubuntu and it errors with a MBR file error (can't remember the exact wording - something to do with missing the file. Choosing to boot W7 works fine. Install from USB Stick: Couldn't get machine to recognize the .iso Install into Oracle's Vbox: Got the boot splash screen, then hangs with a zillion errors. Note: I didn't have any problems installing ubuntu in Vbox on my iMac and it run's great. Installed using wubi: Installed fine but get errors when booting ubuntu (it doesn't find the needed wubi files). I downloaded to the C: drive and tried installing from there - no luck. For kicks: I tried running Slax Linux .iso from a USB stick and it runs fine. Some Questions: Did I use the correct .iso? (I tried 12.04.0 and 12.04.1 both 32 and 64 bit versions. I simply downloaded them from the download link and didn't use/look for an alternate version. Do I need to do something special when burning the .iso to disc? What? I did read tons of posts but, no luck with finding the solution. Any help is appreciated... thanks

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• What's the best way to handle numerous recurring log entries in game loop?

  - by Kaa

  I have a custom logging system, use of which is scattered all over the engine and game. The system is linked to a "LogStore" that has an std::vector<string> logs[NUM_LOG_TYPES] - each vector corresponds with it's log type (info, error, debug, etc.). There's one extra std::vector that has "coordinates" to all log entries in the order they were received. Now, all the logging output is also displayed inside my development console in the game. The game console is handled by HTML-type GUI and therefore requires a new <p> element being added for each log output. My problem is that the log entries that are generated in the main loop each frame freeze the engine, because they continue to add elements to the in-game console, and if the console or guy generates a warning - that creates an infinite logging loop. I want to solve it by handling the recurring log entries in an elegant way that lets you know that something is critically wrong, but won't freeze the engine - like displaying the count of errors in the last 60 frames instead of displaying errors themselves. But how do you guys handle this? Does anyone know any nifty tricks to do this? I understand the question may sound vague, but if someone came across this type of issue I'm sure they would know exactly what's happening. Example problematic log entries: OpenGL warnings (I actually do check for errors every frame in many places) Really any prints anywhere in the main loop (may be debugging, may be warnings)

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• while running mvn jetty:run showing the following error ..

  - by munna

  C:\source\myprojectmvn jetty:run [INFO] Scanning for projects... [INFO] ------------------------------------------------------------------------ [INFO] Building AppFuse Spring MVC Application [INFO] task-segment: [jetty:run] [INFO] ------------------------------------------------------------------------ [INFO] Preparing jetty:run [WARNING] POM for 'xfire:xfire-jsr181-api:pom:1.0-M1:compile' is invalid. Its dependencies (if any) will NOT be available to the current build. [INFO] [warpath:add-classes {execution: default}] [INFO] [aspectj:compile {execution: default}] [INFO] [native2ascii:native2ascii {execution: native2ascii-utf8}] [INFO] [native2ascii:native2ascii {execution: native2ascii-8859_1}] [INFO] [resources:resources {execution: default-resources}] [WARNING] File encoding has not been set, using platform encoding Cp1252, i.e. b uild is platform dependent! [WARNING] Using platform encoding (Cp1252 actually) to copy filtered resources, i.e. build is platform dependent! [INFO] Copying 12 resources [INFO] Copying 1 resource [INFO] Copying 26 resources [INFO] Copying 26 resources [INFO] [compiler:compile {execution: default-compile}] [INFO] Nothing to compile - all classes are up to date [INFO] [resources:testResources {execution: default-testResources}] [WARNING] File encoding has not been set, using platform encoding Cp1252, i.e. b uild is platform dependent! [WARNING] Using platform encoding (Cp1252 actually) to copy filtered resources, i.e. build is platform dependent! [INFO] Copying 4 resources [INFO] Copying 9 resources [INFO] Preparing hibernate3:hbm2ddl [WARNING] Removing: hbm2ddl from forked lifecycle, to prevent recursive invocati on. [INFO] [warpath:add-classes {execution: default}] [INFO] [aspectj:compile {execution: default}] [INFO] [native2ascii:native2ascii {execution: native2ascii-utf8}] [INFO] [native2ascii:native2ascii {execution: native2ascii-8859_1}] [INFO] [resources:resources {execution: default-resources}] [WARNING] File encoding has not been set, using platform encoding Cp1252, i.e. b uild is platform dependent! [WARNING] Using platform encoding (Cp1252 actually) to copy filtered resources, i.e. build is platform dependent! [INFO] Copying 12 resources [INFO] Copying 1 resource [INFO] Copying 26 resources [INFO] Copying 26 resources [INFO] Copying 26 resources [INFO] Copying 26 resources [INFO] [hibernate3:hbm2ddl {execution: default}] [INFO] Configuration XML file loaded: file:/C:/source/myproject/src/main/resourc es/hibernate.cfg.xml [INFO] Configuration XML file loaded: file:/C:/source/myproject/src/main/resourc es/hibernate.cfg.xml [INFO] Configuration Properties file loaded: C:\source\myproject\target\classes\ jdbc.properties alter table user_role drop foreign key FK143BF46A4FD90D75; alter table user_role drop foreign key FK143BF46AF503D155; drop table if exists app_user; drop table if exists role; drop table if exists user_role; create table app_user (id bigint not null auto_increment, account_expired bit no t null, account_locked bit not null, address varchar(150), city varchar(50) not null, country varchar(100), postal_code varchar(15) not null, province varchar(1 00), credentials_expired bit not null, email varchar(255) not null unique, accou nt_enabled bit, first_name varchar(50) not null, last_name varchar(50) not null, password varchar(255) not null, password_hint varchar(255), phone_number varcha r(255), username varchar(50) not null unique, version integer, website varchar(2 55), primary key (id)) ENGINE=InnoDB; create table role (id bigint not null auto_increment, description varchar(64), n ame varchar(20), primary key (id)) ENGINE=InnoDB; create table user_role (user_id bigint not null, role_id bigint not null, primar y key (user_id, role_id)) ENGINE=InnoDB; alter table user_role add index FK143BF46A4FD90D75 (role_id), add constraint FK1 43BF46A4FD90D75 foreign key (role_id) references role (id); alter table user_role add index FK143BF46AF503D155 (user_id), add constraint FK1 43BF46AF503D155 foreign key (user_id) references app_user (id); [INFO] [compiler:testCompile {execution: default-testCompile}] [INFO] Nothing to compile - all classes are up to date [INFO] [dbunit:operation {execution: test-compile}] [INFO] [jetty:run {execution: default-cli}] [INFO] Configuring Jetty for project: AppFuse Spring MVC Application [INFO] Webapp source directory = C:\source\myproject\src\main\webapp [INFO] web.xml file = C:\source\myproject\src\main\webapp\WEB-INF\web.xml [INFO] Classes = C:\source\myproject\target\classes [INFO] Adding extra scan target from pattern: C:\source\myproject\src\main\webap p\WEB-INF\applicationContext-validation.xml [INFO] Adding extra scan target from pattern: C:\source\myproject\src\main\webap p\WEB-INF\applicationContext.xml [INFO] Adding extra scan target from pattern: C:\source\myproject\src\main\webap p\WEB-INF\dispatcher-servlet.xml [INFO] Adding extra scan target from pattern: C:\source\myproject\src\main\webap p\WEB-INF\menu-config.xml [INFO] Adding extra scan target from pattern: C:\source\myproject\src\main\webap p\WEB-INF\urlrewrite.xml [INFO] Adding extra scan target from pattern: C:\source\myproject\src\main\webap p\WEB-INF\validation.xml [INFO] Adding extra scan target from pattern: C:\source\myproject\src\main\webap p\WEB-INF\validator-rules-custom.xml [INFO] Adding extra scan target from pattern: C:\source\myproject\src\main\webap p\WEB-INF\validator-rules.xml [INFO] Adding extra scan target from pattern: C:\source\myproject\src\main\webap p\WEB-INF\web.xml 2010-06-02 15:13:28.921::INFO: Logging to STDERR via org.mortbay.log.StdErrLog [INFO] Context path = / [INFO] Tmp directory = determined at runtime [INFO] Web defaults = org/mortbay/jetty/webapp/webdefault.xml [INFO] Web overrides = none [INFO] Webapp directory = C:\source\myproject\src\main\webapp [INFO] Starting jetty 6.1.9 ... 2010-06-02 15:13:28.983::INFO: jetty-6.1.9 2010-06-02 15:13:28.248::INFO: No Transaction manager found - if your webapp re quires one, please configure one. 2010-06-02 15:13:28.482:/:INFO: Initializing Spring root WebApplicationContext [myproject] ERROR [main] ContextLoader.initWebApplicationContext(215) | Context initialization failed org.springframework.beans.factory.BeanDefinitionStoreException: IOException pars ing XML document from ServletContext resource [/WEB-INF/xfire-servlet.xml]; nest ed exception is java.io.FileNotFoundException: Could not open ServletContext res ource [/WEB-INF/xfire-servlet.xml] at org.springframework.beans.factory.xml.XmlBeanDefinitionReader.loadBea nDefinitions(XmlBeanDefinitionReader.java:349) at org.springframework.beans.factory.xml.XmlBeanDefinitionReader.loadBea nDefinitions(XmlBeanDefinitionReader.java:310) at org.springframework.beans.factory.support.AbstractBeanDefinitionReade r.loadBeanDefinitions(AbstractBeanDefinitionReader.java:143) at org.springframework.beans.factory.support.AbstractBeanDefinitionReade r.loadBeanDefinitions(AbstractBeanDefinitionReader.java:178) at org.springframework.beans.factory.support.AbstractBeanDefinitionReade r.loadBeanDefinitions(AbstractBeanDefinitionReader.java:149) at org.springframework.web.context.support.XmlWebApplicationContext.load BeanDefinitions(XmlWebApplicationContext.java:124) at org.springframework.web.context.support.XmlWebApplicationContext.load BeanDefinitions(XmlWebApplicationContext.java:92) at org.springframework.context.support.AbstractRefreshableApplicationCon text.refreshBeanFactory(AbstractRefreshableApplicationContext.java:123) at org.springframework.context.support.AbstractApplicationContext.obtain FreshBeanFactory(AbstractApplicationContext.java:423) at org.springframework.context.support.AbstractApplicationContext.refres h(AbstractApplicationContext.java:353) at org.springframework.web.context.ContextLoader.createWebApplicationCon text(ContextLoader.java:255) at org.springframework.web.context.ContextLoader.initWebApplicationConte xt(ContextLoader.java:199) at org.springframework.web.context.ContextLoaderListener.contextInitiali zed(ContextLoaderListener.java:45) at org.mortbay.jetty.handler.ContextHandler.startContext(ContextHandler. java:540) at org.mortbay.jetty.servlet.Context.startContext(Context.java:135) at org.mortbay.jetty.webapp.WebAppContext.startContext(WebAppContext.jav a:1220) at org.mortbay.jetty.handler.ContextHandler.doStart(ContextHandler.java: 510) at org.mortbay.jetty.webapp.WebAppContext.doStart(WebAppContext.java:448 ) at org.mortbay.jetty.plugin.Jetty6PluginWebAppContext.doStart(Jetty6Plug inWebAppContext.java:110) at org.mortbay.component.AbstractLifeCycle.start(AbstractLifeCycle.java: 39) at org.mortbay.jetty.handler.HandlerCollection.doStart(HandlerCollection .java:152) at org.mortbay.jetty.handler.ContextHandlerCollection.doStart(ContextHan dlerCollection.java:156) at org.mortbay.component.AbstractLifeCycle.start(AbstractLifeCycle.java: 39) at org.mortbay.jetty.handler.HandlerCollection.doStart(HandlerCollection .java:152) at org.mortbay.component.AbstractLifeCycle.start(AbstractLifeCycle.java: 39) at org.mortbay.jetty.handler.HandlerWrapper.doStart(HandlerWrapper.java: 130) at org.mortbay.jetty.Server.doStart(Server.java:222) at org.mortbay.component.AbstractLifeCycle.start(AbstractLifeCycle.java: 39) at org.mortbay.jetty.plugin.Jetty6PluginServer.start(Jetty6PluginServer. java:132) at org.mortbay.jetty.plugin.AbstractJettyMojo.startJetty(AbstractJettyMo jo.java:357) at org.mortbay.jetty.plugin.AbstractJettyMojo.execute(AbstractJettyMojo. java:293) at org.mortbay.jetty.plugin.AbstractJettyRunMojo.execute(AbstractJettyRu nMojo.java:203) at org.mortbay.jetty.plugin.Jetty6RunMojo.execute(Jetty6RunMojo.java:184 ) at org.apache.maven.plugin.DefaultPluginManager.executeMojo(DefaultPlugi nManager.java:490) at org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeGoals(Defa ultLifecycleExecutor.java:694) at org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeStandalone Goal(DefaultLifecycleExecutor.java:569) at org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeGoal(Defau ltLifecycleExecutor.java:539) at org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeGoalAndHan dleFailures(DefaultLifecycleExecutor.java:387) at org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeTaskSegmen ts(DefaultLifecycleExecutor.java:348) at org.apache.maven.lifecycle.DefaultLifecycleExecutor.execute(DefaultLi fecycleExecutor.java:180) at org.apache.maven.DefaultMaven.doExecute(DefaultMaven.java:328) at org.apache.maven.DefaultMaven.execute(DefaultMaven.java:138) at org.apache.maven.cli.MavenCli.main(MavenCli.java:362) at org.apache.maven.cli.compat.CompatibleMain.main(CompatibleMain.java:6 0) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl. java:39) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAcces sorImpl.java:25) at java.lang.reflect.Method.invoke(Method.java:597) at org.codehaus.classworlds.Launcher.launchEnhanced(Launcher.java:315) at org.codehaus.classworlds.Launcher.launch(Launcher.java:255) at org.codehaus.classworlds.Launcher.mainWithExitCode(Launcher.java:430) at org.codehaus.classworlds.Launcher.main(Launcher.java:375) Caused by: java.io.FileNotFoundException: Could not open ServletContext resource [/WEB-INF/xfire-servlet.xml] at org.springframework.web.context.support.ServletContextResource.getInp utStream(ServletContextResource.java:116) at org.springframework.beans.factory.xml.XmlBeanDefinitionReader.loadBea nDefinitions(XmlBeanDefinitionReader.java:336) ... 51 more 2010-06-02 15:13:29.919::WARN: Failed startup of context org.mortbay.jetty.plug in.Jetty6PluginWebAppContext@1ba4806{/,C:\source\myproject\src\main\webapp} org.springframework.beans.factory.BeanDefinitionStoreException: IOException pars ing XML document from ServletContext resource [/WEB-INF/xfire-servlet.xml]; nest ed exception is java.io.FileNotFoundException: Could not open ServletContext res ource [/WEB-INF/xfire-servlet.xml] at org.springframework.beans.factory.xml.XmlBeanDefinitionReader.loadBea nDefinitions(XmlBeanDefinitionReader.java:349) at org.springframework.beans.factory.xml.XmlBeanDefinitionReader.loadBea nDefinitions(XmlBeanDefinitionReader.java:310) at org.springframework.beans.factory.support.AbstractBeanDefinitionReade r.loadBeanDefinitions(AbstractBeanDefinitionReader.java:143) at org.springframework.beans.factory.support.AbstractBeanDefinitionReade r.loadBeanDefinitions(AbstractBeanDefinitionReader.java:178) at org.springframework.beans.factory.support.AbstractBeanDefinitionReade r.loadBeanDefinitions(AbstractBeanDefinitionReader.java:149) at org.springframework.web.context.support.XmlWebApplicationContext.load BeanDefinitions(XmlWebApplicationContext.java:124) at org.springframework.web.context.support.XmlWebApplicationContext.load BeanDefinitions(XmlWebApplicationContext.java:92) at org.springframework.context.support.AbstractRefreshableApplicationCon text.refreshBeanFactory(AbstractRefreshableApplicationContext.java:123) at org.springframework.context.support.AbstractApplicationContext.obtain FreshBeanFactory(AbstractApplicationContext.java:423) at org.springframework.context.support.AbstractApplicationContext.refres h(AbstractApplicationContext.java:353) at org.springframework.web.context.ContextLoader.createWebApplicationCon text(ContextLoader.java:255) at org.springframework.web.context.ContextLoader.initWebApplicationConte xt(ContextLoader.java:199) at org.springframework.web.context.ContextLoaderListener.contextInitiali zed(ContextLoaderListener.java:45) at org.mortbay.jetty.handler.ContextHandler.startContext(ContextHandler. java:540) at org.mortbay.jetty.servlet.Context.startContext(Context.java:135) at org.mortbay.jetty.webapp.WebAppContext.startContext(WebAppContext.jav a:1220) at org.mortbay.jetty.handler.ContextHandler.doStart(ContextHandler.java: 510) at org.mortbay.jetty.webapp.WebAppContext.doStart(WebAppContext.java:448 ) at org.mortbay.jetty.plugin.Jetty6PluginWebAppContext.doStart(Jetty6Plug inWebAppContext.java:110) at org.mortbay.component.AbstractLifeCycle.start(AbstractLifeCycle.java: 39) at org.mortbay.jetty.handler.HandlerCollection.doStart(HandlerCollection .java:152) at org.mortbay.jetty.handler.ContextHandlerCollection.doStart(ContextHan dlerCollection.java:156) at org.mortbay.component.AbstractLifeCycle.start(AbstractLifeCycle.java: 39) at org.mortbay.jetty.handler.HandlerCollection.doStart(HandlerCollection .java:152) at org.mortbay.component.AbstractLifeCycle.start(AbstractLifeCycle.java: 39) at org.mortbay.jetty.handler.HandlerWrapper.doStart(HandlerWrapper.java: 130) at org.mortbay.jetty.Server.doStart(Server.java:222) at org.mortbay.component.AbstractLifeCycle.start(AbstractLifeCycle.java: 39) at org.mortbay.jetty.plugin.Jetty6PluginServer.start(Jetty6PluginServer. java:132) at org.mortbay.jetty.plugin.AbstractJettyMojo.startJetty(AbstractJettyMo jo.java:357) at org.mortbay.jetty.plugin.AbstractJettyMojo.execute(AbstractJettyMojo. java:293) at org.mortbay.jetty.plugin.AbstractJettyRunMojo.execute(AbstractJettyRu nMojo.java:203) at org.mortbay.jetty.plugin.Jetty6RunMojo.execute(Jetty6RunMojo.java:184 ) at org.apache.maven.plugin.DefaultPluginManager.executeMojo(DefaultPlugi nManager.java:490) at org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeGoals(Defa ultLifecycleExecutor.java:694) at org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeStandalone Goal(DefaultLifecycleExecutor.java:569) at org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeGoal(Defau ltLifecycleExecutor.java:539) at org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeGoalAndHan dleFailures(DefaultLifecycleExecutor.java:387) at org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeTaskSegmen ts(DefaultLifecycleExecutor.java:348) at org.apache.maven.lifecycle.DefaultLifecycleExecutor.execute(DefaultLi fecycleExecutor.java:180) at org.apache.maven.DefaultMaven.doExecute(DefaultMaven.java:328) at org.apache.maven.DefaultMaven.execute(DefaultMaven.java:138) at org.apache.maven.cli.MavenCli.main(MavenCli.java:362) at org.apache.maven.cli.compat.CompatibleMain.main(CompatibleMain.java:6 0) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl. java:39) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAcces sorImpl.java:25) at java.lang.reflect.Method.invoke(Method.java:597) at org.codehaus.classworlds.Launcher.launchEnhanced(Launcher.java:315) at org.codehaus.classworlds.Launcher.launch(Launcher.java:255) at org.codehaus.classworlds.Launcher.mainWithExitCode(Launcher.java:430) at org.codehaus.classworlds.Launcher.main(Launcher.java:375) Caused by: java.io.FileNotFoundException: Could not open ServletContext resource [/WEB-INF/xfire-servlet.xml] at org.springframework.web.context.support.ServletContextResource.getInp utStream(ServletContextResource.java:116) at org.springframework.beans.factory.xml.XmlBeanDefinitionReader.loadBea nDefinitions(XmlBeanDefinitionReader.java:336) ... 51 more 2010-06-02 15:13:29.152::WARN: Nested in org.springframework.beans.factory.Bean DefinitionStoreException: IOException parsing XML document from ServletContext r esource [/WEB-INF/xfire-servlet.xml]; nested exception is java.io.FileNotFoundEx ception: Could not open ServletContext resource [/WEB-INF/xfire-servlet.xml]: java.io.FileNotFoundException: Could not open ServletContext resource [/WEB-INF/ xfire-servlet.xml] at org.springframework.web.context.support.ServletContextResource.getInp utStream(ServletContextResource.java:116) at org.springframework.beans.factory.xml.XmlBeanDefinitionReader.loadBea nDefinitions(XmlBeanDefinitionReader.java:336) at org.springframework.beans.factory.xml.XmlBeanDefinitionReader.loadBea nDefinitions(XmlBeanDefinitionReader.java:310) at org.springframework.beans.factory.support.AbstractBeanDefinitionReade r.loadBeanDefinitions(AbstractBeanDefinitionReader.java:143) at org.springframework.beans.factory.support.AbstractBeanDefinitionReade r.loadBeanDefinitions(AbstractBeanDefinitionReader.java:178) at org.springframework.beans.factory.support.AbstractBeanDefinitionReade r.loadBeanDefinitions(AbstractBeanDefinitionReader.java:149) at org.springframework.web.context.support.XmlWebApplicationContext.load BeanDefinitions(XmlWebApplicationContext.java:124) at org.springframework.web.context.support.XmlWebApplicationContext.load BeanDefinitions(XmlWebApplicationContext.java:92) at org.springframework.context.support.AbstractRefreshableApplicationCon text.refreshBeanFactory(AbstractRefreshableApplicationContext.java:123) at org.springframework.context.support.AbstractApplicationContext.obtain FreshBeanFactory(AbstractApplicationContext.java:423) at org.springframework.context.support.AbstractApplicationContext.refres h(AbstractApplicationContext.java:353) at org.springframework.web.context.ContextLoader.createWebApplicationCon text(ContextLoader.java:255) at org.springframework.web.context.ContextLoader.initWebApplicationConte xt(ContextLoader.java:199) at org.springframework.web.context.ContextLoaderListener.contextInitiali zed(ContextLoaderListener.java:45) at org.mortbay.jetty.handler.ContextHandler.startContext(ContextHandler. java:540) at org.mortbay.jetty.servlet.Context.startContext(Context.java:135) at org.mortbay.jetty.webapp.WebAppContext.startContext(WebAppContext.jav a:1220) at org.mortbay.jetty.handler.ContextHandler.doStart(ContextHandler.java: 510) at org.mortbay.jetty.webapp.WebAppContext.doStart(WebAppContext.java:448 ) at org.mortbay.jetty.plugin.Jetty6PluginWebAppContext.doStart(Jetty6Plug inWebAppContext.java:110) at org.mortbay.component.AbstractLifeCycle.start(AbstractLifeCycle.java: 39) at org.mortbay.jetty.handler.HandlerCollection.doStart(HandlerCollection .java:152) at org.mortbay.jetty.handler.ContextHandlerCollection.doStart(ContextHan dlerCollection.java:156) at org.mortbay.component.AbstractLifeCycle.start(AbstractLifeCycle.java: 39) at org.mortbay.jetty.handler.HandlerCollection.doStart(HandlerCollection .java:152) at org.mortbay.component.AbstractLifeCycle.start(AbstractLifeCycle.java: 39) at org.mortbay.jetty.handler.HandlerWrapper.doStart(HandlerWrapper.java: 130) at org.mortbay.jetty.Server.doStart(Server.java:222) at org.mortbay.component.AbstractLifeCycle.start(AbstractLifeCycle.java: 39) at org.mortbay.jetty.plugin.Jetty6PluginServer.start(Jetty6PluginServer. java:132) at org.mortbay.jetty.plugin.AbstractJettyMojo.startJetty(AbstractJettyMo jo.java:357) at org.mortbay.jetty.plugin.AbstractJettyMojo.execute(AbstractJettyMojo. java:293) at org.mortbay.jetty.plugin.AbstractJettyRunMojo.execute(AbstractJettyRu nMojo.java:203) at org.mortbay.jetty.plugin.Jetty6RunMojo.execute(Jetty6RunMojo.java:184 ) at org.apache.maven.plugin.DefaultPluginManager.executeMojo(DefaultPlugi nManager.java:490) at org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeGoals(Defa ultLifecycleExecutor.java:694) at org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeStandalone Goal(DefaultLifecycleExecutor.java:569) at org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeGoal(Defau ltLifecycleExecutor.java:539) at org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeGoalAndHan dleFailures(DefaultLifecycleExecutor.java:387) at org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeTaskSegmen ts(DefaultLifecycleExecutor.java:348) at org.apache.maven.lifecycle.DefaultLifecycleExecutor.execute(DefaultLi fecycleExecutor.java:180) at org.apache.maven.DefaultMaven.doExecute(DefaultMaven.java:328) at org.apache.maven.DefaultMaven.execute(DefaultMaven.java:138) at org.apache.maven.cli.MavenCli.main(MavenCli.java:362) at org.apache.maven.cli.compat.CompatibleMain.main(CompatibleMain.java:6 0) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl. java:39) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAcces sorImpl.java:25) at java.lang.reflect.Method.invoke(Method.java:597) at org.codehaus.classworlds.Launcher.launchEnhanced(Launcher.java:315) at org.codehaus.classworlds.Launcher.launch(Launcher.java:255) at org.codehaus.classworlds.Launcher.mainWithExitCode(Launcher.java:430) at org.codehaus.classworlds.Launcher.main(Launcher.java:375) 2010-06-02 15:13:29.417::INFO: Started [email protected]:8080 [INFO] Started Jetty Server [INFO] Starting scanner at interval of 3 seconds.

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• C# 4.0: Dynamic Programming

  - by Paulo Morgado

  The major feature of C# 4.0 is dynamic programming. Not just dynamic typing, but dynamic in broader sense, which means talking to anything that is not statically typed to be a .NET object. Dynamic Language Runtime The Dynamic Language Runtime (DLR) is piece of technology that unifies dynamic programming on the .NET platform, the same way the Common Language Runtime (CLR) has been a common platform for statically typed languages. The CLR always had dynamic capabilities. You could always use reflection, but its main goal was never to be a dynamic programming environment and there were some features missing. The DLR is built on top of the CLR and adds those missing features to the .NET platform. The Dynamic Language Runtime is the core infrastructure that consists of: Expression Trees The same expression trees used in LINQ, now improved to support statements. Dynamic Dispatch Dispatches invocations to the appropriate binder. Call Site Caching For improved efficiency. Dynamic languages and languages with dynamic capabilities are built on top of the DLR. IronPython and IronRuby were already built on top of the DLR, and now, the support for using the DLR is being added to C# and Visual Basic. Other languages built on top of the CLR are expected to also use the DLR in the future. Underneath the DLR there are binders that talk to a variety of different technologies: .NET Binder Allows to talk to .NET objects. JavaScript Binder Allows to talk to JavaScript in SilverLight. IronPython Binder Allows to talk to IronPython. IronRuby Binder Allows to talk to IronRuby. COM Binder Allows to talk to COM. Whit all these binders it is possible to have a single programming experience to talk to all these environments that are not statically typed .NET objects. The dynamic Static Type Let’s take this traditional statically typed code: Calculator calculator = GetCalculator(); int sum = calculator.Sum(10, 20); Because the variable that receives the return value of the GetCalulator method is statically typed to be of type Calculator and, because the Calculator type has an Add method that receives two integers and returns an integer, it is possible to call that Sum method and assign its return value to a variable statically typed as integer. Now lets suppose the calculator was not a statically typed .NET class, but, instead, a COM object or some .NET code we don’t know he type of. All of the sudden it gets very painful to call the Add method: object calculator = GetCalculator(); Type calculatorType = calculator.GetType(); object res = calculatorType.InvokeMember("Add", BindingFlags.InvokeMethod, null, calculator, new object[] { 10, 20 }); int sum = Convert.ToInt32(res); And what if the calculator was a JavaScript object? ScriptObject calculator = GetCalculator(); object res = calculator.Invoke("Add", 10, 20); int sum = Convert.ToInt32(res); For each dynamic domain we have a different programming experience and that makes it very hard to unify the code. With C# 4.0 it becomes possible to write code this way: dynamic calculator = GetCalculator(); int sum = calculator.Add(10, 20); You simply declare a variable who’s static type is dynamic. dynamic is a pseudo-keyword (like var) that indicates to the compiler that operations on the calculator object will be done dynamically. The way you should look at dynamic is that it’s just like object (System.Object) with dynamic semantics associated. Anything can be assigned to a dynamic. dynamic x = 1; dynamic y = "Hello"; dynamic z = new List<int> { 1, 2, 3 }; At run-time, all object will have a type. In the above example x is of type System.Int32. When one or more operands in an operation are typed dynamic, member selection is deferred to run-time instead of compile-time. Then the run-time type is substituted in all variables and normal overload resolution is done, just like it would happen at compile-time. The result of any dynamic operation is always dynamic and, when a dynamic object is assigned to something else, a dynamic conversion will occur. Code Resolution Method double x = 1.75; double y = Math.Abs(x); compile-time double Abs(double x) dynamic x = 1.75; dynamic y = Math.Abs(x); run-time double Abs(double x) dynamic x = 2; dynamic y = Math.Abs(x); run-time int Abs(int x) The above code will always be strongly typed. The difference is that, in the first case the method resolution is done at compile-time, and the others it’s done ate run-time. IDynamicMetaObjectObject The DLR is pre-wired to know .NET objects, COM objects and so forth but any dynamic language can implement their own objects or you can implement your own objects in C# through the implementation of the IDynamicMetaObjectProvider interface. When an object implements IDynamicMetaObjectProvider, it can participate in the resolution of how method calls and property access is done. The .NET Framework already provides two implementations of IDynamicMetaObjectProvider: DynamicObject : IDynamicMetaObjectProvider The DynamicObject class enables you to define which operations can be performed on dynamic objects and how to perform those operations. For example, you can define what happens when you try to get or set an object property, call a method, or perform standard mathematical operations such as addition and multiplication. ExpandoObject : IDynamicMetaObjectProvider The ExpandoObject class enables you to add and delete members of its instances at run time and also to set and get values of these members. This class supports dynamic binding, which enables you to use standard syntax like sampleObject.sampleMember, instead of more complex syntax like sampleObject.GetAttribute("sampleMember").

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• Build One Application Version for Both Windows XP and Windows Vista

  You don't have to compile two different versions to get applications that run correctly under both Windows XP and Windows Vista.

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• Exception in thread "main" java.lang.NoSuchMethodError: sun/misc/Unsafe.allocateDBBMemory

  - by user2524935

  Has anyone been able to compile JRuby on a s390x Linux system? I am trying to use LogStash, which apparently requires JRuby, however SLES 11 has no JRuby repo included. jar ant produces the following. compile-annotation-binder: [javac] Compiling 18 source files to /home/user7/jruby-1.7.4/build/classes/jruby [javac] warning: [options] bootstrap class path not set in conjunction with -source 1.6 [javac] Note: /home/user7/jruby-1.7.4/src/org/jruby/util/CodegenUtils.java uses unchecked or unsafe operations. [javac] Note: Recompile with -Xlint:unchecked for details. [javac] 1 warning compile-jruby: [javac] Compiling 1395 source files to /home/user7/jruby-1.7.4/build/classes/jruby [javac] Exception in thread "main" java.lang.NoSuchMethodError: sun/misc/Unsafe.allocateDBBMemory(J)J [javac] at java.nio.DirectByteBuffer.(DirectByteBuffer.java:127) [javac] at java.nio.ByteBuffer.allocateDirect(ByteBuffer.java:306) [javac] at sun.misc.Perf.createLong(Native Method) [javac] at sun.misc.PerfCounter.(PerfCounter.java:77) [javac] at sun.misc.PerfCounter.newPerfCounter(PerfCounter.java:83) [javac] at sun.misc.PerfCounter$CoreCounters.(PerfCounter.java:140) [javac] at java.lang.J9VMInternals.initializeImpl(Native Method) [javac] at java.lang.J9VMInternals.initialize(J9VMInternals.java:236) [javac] at sun.misc.PerfCounter.getZipFileOpenTime(PerfCounter.java:194) [javac] at java.util.zip.ZipFile.(ZipFile.java:230) [javac] at java.util.zip.ZipFile.(ZipFile.java:159) [javac] at java.util.jar.JarFile.(JarFile.java:167) [javac] at java.util.jar.JarFile.(JarFile.java:104) [javac] at sun.misc.URLClassPath$JarLoader.getJarFile(URLClassPath.java:958) [javac] at sun.misc.URLClassPath$JarLoader.access$700(URLClassPath.java:826) [javac] at sun.misc.URLClassPath$JarLoader$1.run(URLClassPath.java:909) [javac] at sun.misc.URLClassPath$JarLoader$1.run(URLClassPath.java:899) [javac] at java.security.AccessController.doPrivileged(AccessController.java:280) [javac] at sun.misc.URLClassPath$JarLoader.ensureOpen(URLClassPath.java:898) [javac] at sun.misc.URLClassPath$JarLoader.(URLClassPath.java:871) [javac] at sun.misc.URLClassPath$3.rtJarLoader(URLClassPath.java:596) [javac] at sun.misc.URLClassPath$3.run(URLClassPath.java:546) [javac] at sun.misc.URLClassPath$3.run(URLClassPath.java:536) [javac] at java.security.AccessController.doPrivileged(AccessController.java:280) [javac] at sun.misc.URLClassPath.getLoader(URLClassPath.java:535) [javac] at sun.misc.URLClassPath.getLoader(URLClassPath.java:498) [javac] at sun.misc.URLClassPath.getResource(URLClassPath.java:324) [javac] at java.net.URLClassLoader$ClassFinder.run(URLClassLoader.java:1157) [javac] at java.security.AccessController.doPrivileged(AccessController.java:314) [javac] at java.net.URLClassLoader.findClass(URLClassLoader.java:594) [javac] at java.lang.ClassLoader.loadClassHelper(ClassLoader.java:743) [javac] at java.lang.ClassLoader.loadClass(ClassLoader.java:711) [javac] at java.lang.ClassLoader.loadClassHelper(ClassLoader.java:735) [javac] at java.lang.ClassLoader.loadClass(ClassLoader.java:711) [javac] at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:325) [javac] at java.lang.ClassLoader.loadClass(ClassLoader.java:690) [javac] at sun.launcher.LauncherHelper.checkAndLoadMain(LauncherHelper.java:494) BUILD FAILED /home/user7/jruby-1.7.4/build.xml:636: The following error occurred while executing this line: /home/user7/jruby-1.7.4/build.xml:289: Compile failed; see the compiler error output for details. Total time: 1 minute 37 seconds Line 636 of build.xml <target name="jar" depends="init" description="Create the jruby.jar file. Used during dev."> -> <antcall target="jar-jruby" inheritall="true"/> </target> Line 289 of build.xml <javac destdir="${jruby.classes.dir}" fork="true" debug="true" source="${javac.version}" target="${javac.version}" -> deprecation="true" encoding="UTF-8" includeantruntime="true" memorymaximumsize="${jruby.compile.memory}"> <classpath refid="jruby.execute.classpath"/> <src path="${src.dir}"/> <exclude name="org/jruby/runtime/Constants.java"/> java -version java version "1.7.0" Java(TM) SE Runtime Environment (build pxz6470sr4fp1-20130325_01(SR4 FP1)) IBM J9 VM (build 2.6, JRE 1.7.0 Linux s390x-64 Compressed References 20130306_140761 (JIT enabled, AOT enabled) J9VM - R26_Java726_SR4_FP1_20130306_1011_B140761 JIT - r11.b03_20130131_32403ifx1 GC - R26_Java726_SR4_FP1_20130306_1011_B140761_CMPRSS J9CL - 20130306_140761) JCL - 20130315_01 based on Oracle 7u13-b08 ant -version Apache Ant version 1.7.1

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• Simplifying the process of compiling and running objective-c apps in GNUstep

  - by Matthew

  I just installed GNUstep (following this post: http://www.jaysonjc.com/programming/objective-c-programming-in-windows-gnustep-projectcenter.html) It says to run this code: gcc -o helloworld helloworld.m -I /GNUstep/System/Library/Headers -L /GNUstep/System/Library/Libraries -lobjc -lgnustep-base -fconstant-string-class=NSConstantString every time I want to compile. It works just fine for me. However as I'm learning and will be compiling/running apps way often (making little changes and trying again), I'd like a simpler way to do this. Is there an easier way to compile and then run the app? Or am I just being lazy?

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• Convert Dynamic to Type and convert Type to Dynamic

  - by Jon Canning

  public static class DynamicExtensions     {         public static T FromDynamic<T>(this IDictionary<string, object> dictionary)         {             var bindings = new List<MemberBinding>();             foreach (var sourceProperty in typeof(T).GetProperties().Where(x => x.CanWrite))             {                 var key = dictionary.Keys.SingleOrDefault(x => x.Equals(sourceProperty.Name, StringComparison.OrdinalIgnoreCase));                 if (string.IsNullOrEmpty(key)) continue;                 var propertyValue = dictionary[key];                 bindings.Add(Expression.Bind(sourceProperty, Expression.Constant(propertyValue)));             }             Expression memberInit = Expression.MemberInit(Expression.New(typeof(T)), bindings);             return Expression.Lambda<Func<T>>(memberInit).Compile().Invoke();         }         public static dynamic ToDynamic<T>(this T obj)         {             IDictionary<string, object> expando = new ExpandoObject();             foreach (var propertyInfo in typeof(T).GetProperties())             {                 var propertyExpression = Expression.Property(Expression.Constant(obj), propertyInfo);                 var currentValue = Expression.Lambda<Func<string>>(propertyExpression).Compile().Invoke();                 expando.Add(propertyInfo.Name.ToLower(), currentValue);             }             return expando as ExpandoObject;         }     }

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• CodePlex Daily Summary for Monday, August 13, 2012

  CodePlex Daily Summary for Monday, August 13, 2012Popular ReleasesDeForm: DeForm v1.0: Initial Version Support for: GaussianBlur effect ConvolveMatrix effect ColorMatrix effect Morphology effectLiteBlog (MVC): LiteBlog 1.31: Features of this release Windows8 styled UI Namespace and code refactoring Resolved the deployment issues in the previous release Added documentation Help file Help file is HTML based built using SandCastle Help file works in all browsers except IE10Self-Tracking Entity Generator for WPF and Silverlight: Self-Tracking Entity Generator v 2.0.0 for VS11: Self-Tracking Entity Generator for WPF and Silverlight v 2.0.0 for Entity Framework 5.0 and Visual Studio 2012Coding4Fun Tools: Coding4Fun.Phone.Toolkit v1.6.0: New Stuff ImageTile Control - think People Tile MicrophoneRecorder - Coding4Fun.Phone.Audio GzipWebClient - Coding4Fun.Phone.Net Serialize - Coding4Fun.Phone.Storage this is code I've written countless times. JSON.net is another alternative ChatBubbleTextBox - Added in Hint TimeSpan languages added: Pl Bug Fixes RoundToggleButton - Enable Visual State not being respected OpacityToggleButton - Enable Visual State not being respected Prompts VS Crash fix for IsPrompt=true More...AssaultCube Reloaded: 2.5.2 Unnamed: Linux has Ubuntu 11.10 32-bit precompiled binaries and Ubuntu 10.10 64-bit precompiled binaries, but you can compile your own as it also contains the source. If you are using Mac or other operating systems, please wait while we try to pack it. Try to compile it. If it fails, download a virtual machine. The server pack is ready for both Windows and Linux, but you might need to compile your own for Linux (source included) Added 3rd person Added mario jumps Fixed nextprimary code exploit ...NPOI: NPOI 2.0: New features a. Implement OpenXml4Net (same as System.Packaging from Microsoft). It supports both .NET 2.0 and .NET 4.0 b. Excel 2007 read/write library (NPOI.XSSF) c. Word 2007 read/write library(NPOI.XWPF) d. NPOI.SS namespace becomes the interface shared between XSSF and HSSF e. Load xlsx template and save as new xlsx file (partially supported) f. Diagonal line in cell both in xls and xlsx g. Support isRightToLeft and setRightToLeft on the common spreadsheet Sheet interface, as per existin...BugNET Issue Tracker: BugNET 1.1: This release includes bug fixes from the 1.0 release for email notifications, RSS feeds, and several other issues. Please see the change log for a full list of changes. http://support.bugnetproject.com/Projects/ReleaseNotes.aspx?pid=1&m=76 Upgrade Notes The following changes to the web.config in the profile section have occurred: Removed <add name="NotificationTypes" type="String" defaultValue="Email" customProviderData="NotificationTypes;nvarchar;255" />Added <add name="ReceiveEmailNotifi...ClosedXML - The easy way to OpenXML: ClosedXML 0.67.0: Conditional formats now accept formulas. Major performance improvement when opening files with merged ranges. Misc fixes.Virtual Keyboard: Virtual Keyboard v2.0 Source Code: This release has a few added keys that were missing in the earlier versions.Visual Rx: V 2.0.20622.9: help will be available at my blog http://blogs.microsoft.co.il/blogs/bnaya/archive/2012/08/12/visual-rx-toc.aspx the SDK is also available though NuGet (search for VisualRx) http://nuget.org/packages/VisualRx if you want to make sure that the Visual Rx Viewer can monitor on your machine, you can install the Visual Rx Tester and run it while the Viewer is running.????: ????2.0.5: 1、?????????????。RiP-Ripper & PG-Ripper: PG-Ripper 1.4.01: changes NEW: Added Support for Clipboard Function in Mono Version NEW: Added Support for "ImgBox.com" links FIXED: "PixHub.eu" links FIXED: "ImgChili.com" links FIXED: Kitty-Kats Forum loginPlayer Framework by Microsoft: Player Framework for Windows 8 (Preview 5): Support for Smooth Streaming SDK beta 2 Support for live playback New bitrate meter and SD/HD indicators Auto smooth streaming track restriction for snapped mode to conserve bandwidth New "Go Live" button and SeekToLive API Support for offset start times Support for Live position unique from end time Support for multiple audio streams (smooth and progressive content) Improved intellisense in JS version Support for Windows 8 RTM ADDITIONAL DOWNLOADSSmooth Streaming Client SD...Media Companion: Media Companion 3.506b: This release includes an update to the XBMC scrapers, for those who prefer to use this method. There were a number of behind-the-scene tweaks to make Media Companion compatible with the new TMDb-V3 API, so it was considered important to get it out to the users to try it out. Please report back any important issues you might find. For this reason, unless you use the XBMC scrapers, there probably isn't any real necessity to download this one! The only other minor change was one to allow the mc...NVorbis: NVorbis v0.3: Fix Ogg page reader to correctly handle "split" packets Fix "zero-energy" packet handling Fix packet reader to always merge packets when needed Add statistics properties to VorbisReader.Stats Add multi-stream API (for Ogg files containing multiple Vorbis streams)System.Net.FtpClient: System.Net.FtpClient 2012.08.08: 2012.08.08 Release. Several changes, see commit notes in source code section. CHM help as well as source for this release are included in the download. Remember that Windows 7 by default (and possibly older versions) will block you from opening the CHM by default due to trust settings. To get around the problem, right click on the CHM, choose properties and click the Un-block button. Please note that this will be the last release tested to compile with the .net 2.0 framework. I will be remov...Isis2 Cloud Computing Library: Isis2 Alpha V1.1.967: This is an alpha pre-release of the August 2012 version of the system. I've been testing and fixing many problems and have also added a new group "lock" API (g.Lock("lock name")/g.Unlock/g.Holder/g.SetLockPolicy); with this, Isis2 can mimic Chubby, Google's locking service. I wouldn't say that the system is entirely stable yet, and I haven't rechecked every single problem I had seen in May/June, but I think it might be good to get some additional use of this release. By now it does seem to...JSON C# Class Generator: JSON CSharp Class Generator 1.3: Support for native JSON.net serializer/deserializer (POCO) New classes layout option: nested classes Better handling of secondary classesAxiom 3D Rendering Engine: v0.8.3376.12322: Changes Since v0.8.3102.12095 ===================================================================== Updated ndoc3 binaries to fix bug Added uninstall.ps1 to nuspec packages fixed revision component in version numbering Fixed sln referencing VS 11 Updated OpenTK Assemblies Added CultureInvarient to numeric parsing Added First Visual Studio 2010 Project Template (DirectX9) Updated SharpInputSystem Assemblies Backported fix for OpenGL Auto-created window not responding to input Fixed freeInterna...DotSpatial: DotSpatial 1.3: This is a Minor Release. See the changes in the issue tracker. Minimal -- includes DotSpatial core and essential extensions Extended -- includes debugging symbols and additional extensions Tutorials are available. Just want to run the software? End user (non-programmer) version available branded as MapWindow Want to add your own feature? Develop a plugin, using the template and contribute to the extension feed (you can also write extensions that you distribute in other ways). Components ...New Projects.NET Weather Component: NET Weather is a component that will allow you to query various weather services for forcasts, current observations, etc..AxisProvider: Axis is a .NET reactive extensions based subscription and publication framework.Blawkay Hockey: Some xna testing i'm doing.Bolt Browser: Browse the web with ease. You'll never meet a browser more simple, friendly and easy to use. Blaze through the web the way it should be. Fast and beautiful.dotHTML: dotHTML provides a .NET-based DOM for HTML and CSS, facilitating code-driven creation of Web data.Fake DbConnection for Unit Testing EF Code: Unit test Entity Framework 4.3+ and confirm you have valid LINQ-to-Entities code without any need for a database connection.FNHMVC: FNHMVC is an architectural foundation for building maintainable web applications with ASP.NET, MVC, NHibernate & Autofac.FreeAgentMobile: FreeAgentMobile is a Windows Phone project intended to provide access to the FreeAgent Accounting application.Lexer: Generate a lexical analyzer (lexer) for a custom grammar by editing a T4 template.LibXmlSocket: XmlSocket LibraryMaxAlarm: This progect i create for my friend Igor.Minecraft Text Splitter: This tool was made to assist you in writing Minecraft books by splitting text into 255-byte pages and auto-copying it for later pasting into Minecraft.MxPlugin: MxPlugin is a project which demonstrates the calling of functions contained in DLLs both statically and dynamically. Parser: Generate a parser for a custom grammar by editing a T4 template.Sliding Boxes Windows Phone Game source code: .SmartSpider: ??????Http???????????，????????、??、???????。techsolittestpro: This project is testting project of codeplexThe Tiff Library - Fast & Simple .Net Tiff Library: The Tiff Library - Fast & Simple .Net Tiff LibraryVirtualizingWrapPanel: testVisual Rx: Visual Rx is a bundle of API and a Viewer which can monitor and visualize Rx datum stream (at run-time).we7T: testWebForms Transverse Library: This projet is aimed to compile best practices in ASP .NET WebForms development as generic tools working with UI components from various origins.

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• Flex SDK missing fundamental things

  - by Bart van Heukelom

  All of a sudden Flash Builder 4 is missing all kinds of fundamental things and is generating incorrect errors. I've had the same issue yesterday, where I fixed it by downloading a new Flex SDK and importing that into FB. I did this again, but this time it fixed nothing. I don't think it's something I did, like removing critical references from the build path. The errors also appeared on projects I was not working on at the time. It occurs for ActionScript, Flex and Flex Library projects alike. Update 3: Well, i've singled the problem down to a single piece of code, though a very simple one. I can make a new workspace in FB and things work ok, then screw the workspace up forever by adding this code to a project. All projects will have errors and closing or even removing the faulty project does not change this. Making another new workspace (without the faulty code) makes my projects compile again. Link: http://www.the3rdage.net/files/2745/Main.as (i've uploaded the file in case an odd character or encoding error causes the error) Update 2: I've tried manual compiling with mxmlc, the same errors occur. It appears to be an SDK problem, not Flash Builder. Update: I find this stack trace in the Flash Builder error log: !ENTRY com.adobe.flexbuilder.project 4 43 2010-05-11 11:55:47.495 !MESSAGE Uncaught exception in compiler !STACK 0 java.lang.NullPointerException at macromedia.asc.semantics.ConstantEvaluator.evaluate(ConstantEvaluator.java:2592) at macromedia.asc.parser.VariableBindingNode.evaluate(VariableBindingNode.java:64) at macromedia.asc.semantics.ConstantEvaluator.evaluate(ConstantEvaluator.java:2233) at macromedia.asc.parser.ListNode.evaluate(ListNode.java:44) at macromedia.asc.semantics.ConstantEvaluator.evaluate(ConstantEvaluator.java:2578) at macromedia.asc.parser.VariableDefinitionNode.evaluate(VariableDefinitionNode.java:48) at macromedia.asc.semantics.ConstantEvaluator.evaluate(ConstantEvaluator.java:2310) at macromedia.asc.parser.StatementListNode.evaluate(StatementListNode.java:60) at macromedia.asc.semantics.ConstantEvaluator.evaluate(ConstantEvaluator.java:2503) at macromedia.asc.parser.WithStatementNode.evaluate(WithStatementNode.java:44) at macromedia.asc.semantics.ConstantEvaluator.evaluate(ConstantEvaluator.java:2310) at macromedia.asc.parser.StatementListNode.evaluate(StatementListNode.java:60) at macromedia.asc.semantics.ConstantEvaluator.evaluate(ConstantEvaluator.java:2891) at macromedia.asc.parser.FunctionCommonNode.evaluate(FunctionCommonNode.java:106) at macromedia.asc.semantics.ConstantEvaluator.evaluate(ConstantEvaluator.java:2905) at macromedia.asc.parser.FunctionCommonNode.evaluate(FunctionCommonNode.java:106) at macromedia.asc.semantics.ConstantEvaluator.evaluate(ConstantEvaluator.java:3643) at macromedia.asc.parser.ClassDefinitionNode.evaluate(ClassDefinitionNode.java:106) at macromedia.asc.semantics.ConstantEvaluator.evaluate(ConstantEvaluator.java:3371) at macromedia.asc.parser.ProgramNode.evaluate(ProgramNode.java:80) at flex2.compiler.as3.As3Compiler.analyze4(As3Compiler.java:709) at flex2.compiler.CompilerAPI.analyze(CompilerAPI.java:3089) at flex2.compiler.CompilerAPI.analyze(CompilerAPI.java:2977) at flex2.compiler.CompilerAPI.batch2(CompilerAPI.java:528) at flex2.compiler.CompilerAPI.batch(CompilerAPI.java:1274) at flex2.compiler.CompilerAPI.compile(CompilerAPI.java:1496) at flex2.tools.oem.Application.compile(Application.java:1188) at flex2.tools.oem.Application.recompile(Application.java:1133) at flex2.tools.oem.Application.compile(Application.java:819) at flex2.tools.flexbuilder.BuilderApplication.compile(BuilderApplication.java:344) at com.adobe.flexbuilder.multisdk.compiler.internal.ASApplicationBuilder$MyBuilder.mybuild(ASApplicationBuilder.java:276) at com.adobe.flexbuilder.multisdk.compiler.internal.ASApplicationBuilder.build(ASApplicationBuilder.java:127) at com.adobe.flexbuilder.multisdk.compiler.internal.ASBuilder.build(ASBuilder.java:190) at com.adobe.flexbuilder.multisdk.compiler.internal.ASItemBuilder.build(ASItemBuilder.java:74) at com.adobe.flexbuilder.project.compiler.internal.FlexProjectBuilder.buildItem(FlexProjectBuilder.java:480) at com.adobe.flexbuilder.project.compiler.internal.FlexProjectBuilder.build(FlexProjectBuilder.java:306) at com.adobe.flexbuilder.project.compiler.internal.FlexIncrementalBuilder.build(FlexIncrementalBuilder.java:157) at org.eclipse.core.internal.events.BuildManager$2.run(BuildManager.java:627) at org.eclipse.core.runtime.SafeRunner.run(SafeRunner.java:42) at org.eclipse.core.internal.events.BuildManager.basicBuild(BuildManager.java:170) at org.eclipse.core.internal.events.BuildManager.basicBuild(BuildManager.java:201) at org.eclipse.core.internal.events.BuildManager$1.run(BuildManager.java:253) at org.eclipse.core.runtime.SafeRunner.run(SafeRunner.java:42) at org.eclipse.core.internal.events.BuildManager.basicBuild(BuildManager.java:256) at org.eclipse.core.internal.events.BuildManager.basicBuildLoop(BuildManager.java:309) at org.eclipse.core.internal.events.BuildManager.build(BuildManager.java:341) at org.eclipse.core.internal.events.AutoBuildJob.doBuild(AutoBuildJob.java:140) at org.eclipse.core.internal.events.AutoBuildJob.run(AutoBuildJob.java:238) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:55)

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• Installation of Ubuntu 12.04 LTS is Crashing from Live CD

  - by Daniel Evans

  Hardware: Dell Inspiron 1545 Steps are as follows: Insert Ubuntu 12.04 disc Boot computer Output is as follows error: unexpectedly disconnected from boot status daemon Generating locales... en_US.UTF-8... done Generation complete. ***MEMORY-ERROR***: glib-compile-schemas[569]: GSlice: assertion failed: aligned_memory == (gpointer) addr Aborted pwconv: failed to change the mode of /etc/passwd- to 0600 ***MEMORY-ERROR***: [996]: GSlice: assertion failed: aligned_memory == (gpointer) addr ***MEMORY-ERROR***: glib-compile-scehmas[1034]: GSlice: assertion failed: aligned_memory == gpointer) addr Aborted /usr/lib/python2.7/dist-packages/LanguageSelector/LocaleInfo.py:256: UserWarning: Failed to connect to socket /var/run/dbus/system_bus_socket: No such file or directory warnings.warn(msg.args[0].encode('UTF-8')) Using CD-ROM mount point /cdrom ... etc etc... End up at a prompt line ubuntu@ubuntu:~$ The computer's self tests have given the following three errors (so far): Error Code OFOO:O65D Msg DISK-DST Self-test read error SATA Disk S/N=.... Confidence Test Fail Error Code 0F00:1332 Msg: DISK- Block 418047942: Interrupt Request (IRQ) Error Code: 0142 HD0 self test unsuccessful Status 79

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• Creating Property Set Expression Trees In A Developer Friendly Way

  - by Paulo Morgado

  In a previous post I showed how to create expression trees to set properties on an object. The way I did it was not very developer friendly. It involved explicitly creating the necessary expressions because the compiler won’t generate expression trees with property or field set expressions. Recently someone contacted me the help develop some kind of command pattern framework that used developer friendly lambdas to generate property set expression trees. Simply putting, given this entity class: public class Person { public string Name { get; set; } } The person in question wanted to write code like this: var et = Set((Person p) => p.Name = "me"); Where et is the expression tree that represents the property assignment. So, if we can’t do this, let’s try the next best thing that is splitting retrieving the property information from the retrieving the value to assign o the property: var et = Set((Person p) => p.Name, () => "me"); And this is something that the compiler can handle. The implementation of Set receives an expression to retrieve the property information from and another expression the retrieve the value to assign to the property: public static Expression<Action<TEntity>> Set<TEntity, TValue>( Expression<Func<TEntity, TValue>> propertyGetExpression, Expression<Func<TValue>> valueExpression) The implementation of this method gets the property information form the body of the property get expression (propertyGetExpression) and the value expression (valueExpression) to build an assign expression and builds a lambda expression using the same parameter of the property get expression as its parameter: public static Expression<Action<TEntity>> Set<TEntity, TValue>( Expression<Func<TEntity, TValue>> propertyGetExpression, Expression<Func<TValue>> valueExpression) { var entityParameterExpression = (ParameterExpression)(((MemberExpression)(propertyGetExpression.Body)).Expression); return Expression.Lambda<Action<TEntity>>( Expression.Assign(propertyGetExpression.Body, valueExpression.Body), entityParameterExpression); } And now we can use the expression to translate to another context or just compile and use it: var et = Set((Person p) => p.Name, () => name); Console.WriteLine(person.Name); // Prints: p => (p.Name = “me”) var d = et.Compile(); d(person); Console.WriteLine(person.Name); // Prints: me It can even support closures: var et = Set((Person p) => p.Name, () => name); Console.WriteLine(person.Name); // Prints: p => (p.Name = value(<>c__DisplayClass0).name) var d = et.Compile(); name = "me"; d(person); Console.WriteLine(person.Name); // Prints: me name = "you"; d(person); Console.WriteLine(person.Name); // Prints: you Not so useful in the intended scenario (but still possible) is building an expression tree that receives the value to assign to the property as a parameter: public static Expression<Action<TEntity, TValue>> Set<TEntity, TValue>(Expression<Func<TEntity, TValue>> propertyGetExpression) { var entityParameterExpression = (ParameterExpression)(((MemberExpression)(propertyGetExpression.Body)).Expression); var valueParameterExpression = Expression.Parameter(typeof(TValue)); return Expression.Lambda<Action<TEntity, TValue>>( Expression.Assign(propertyGetExpression.Body, valueParameterExpression), entityParameterExpression, valueParameterExpression); } This new expression can be used like this: var et = Set((Person p) => p.Name); Console.WriteLine(person.Name); // Prints: (p, Param_0) => (p.Name = Param_0) var d = et.Compile(); d(person, "me"); Console.WriteLine(person.Name); // Prints: me d(person, "you"); Console.WriteLine(person.Name); // Prints: you The only caveat is that we need to be able to write code to read the property in order to write to it.

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• Beware of const members

  - by nmarun

  I happened to learn a new thing about const today and how one needs to be careful with its usage. Let’s say I have a third-party assembly ‘ConstVsReadonlyLib’ with a class named ConstSideEffect.cs: 1: public class ConstSideEffect 2: { 3: public static readonly int StartValue = 10; 4: public const int EndValue = 20; 5: } In my project, I reference the above assembly as follows: 1: static void Main(string[] args) 2: { 3: for (int i = ConstSideEffect.StartValue; i < ConstSideEffect.EndValue; i++) 4: { 5: Console.WriteLine(i); 6: } 7: Console.ReadLine(); 8: } You’ll see values 10 through 19 as expected. Now, let’s say I receive a new version of the ConstVsReadonlyLib. 1: public class ConstSideEffect 2: { 3: public static readonly int StartValue = 5; 4: public const int EndValue = 30; 5: } If I just drop this new assembly in the bin folder and run the application, without rebuilding my console application, my thinking was that the output would be from 5 to 29. Of course I was wrong… if not you’d not be reading this blog. The actual output is from 5 through 19. The reason is due to the behavior of const and readonly members. To begin with, const is the compile-time constant and readonly is a runtime constant. Next, when you compile the code, a compile-time constant member is replaced with the value of the constant in the code. But, the IL generated when you reference a read-only constant, references the readonly variable, not its value. So, the IL version of the Main method, after compilation actually looks something like: 1: static void Main(string[] args) 2: { 3: for (int i = ConstSideEffect.StartValue; i < 20; i++) 4: { 5: Console.WriteLine(i); 6: } 7: Console.ReadLine(); 8: } I’m no expert with this IL thingi, but when I look at the disassembled code of the exe file (using IL Disassembler), I see the following: I see our readonly member still being referenced by the variable name (ConstVsReadonlyLib.ConstSideEffect::StartValue) in line 0001. Then there’s the Console.WriteLine in line 000b and finally, see the value of 20 in line 0017. This, I’m pretty sure is our const member being replaced by its value which marks the upper bound of the ‘for’ loop. Now you know why the output was from 5 through 19. This definitely is a side-effect of having const members and one needs to be aware of it. While we’re here, I’d like to add a few other points about const and readonly members: const is slightly faster, but is less flexible readonly cannot be declared within a method scope const can be used only on primitive types (numbers and strings) Just wanted to share this before going to bed!

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• javac -cp : cannot find symbol problem [migrated]

  - by LivingThing

  I have 3 classes CustomerAddress, Customer and CustomerMain. Customer has a import statement : import org.abc.customers.CustomerAddress; While CustomerMain has an import statement : import org.abc.customers.CustomerAddress; import org.abc.customers.Customer; The package for all of these classes are package org.abc.customer Now, this program works fine on eclipse but when i try to compile and run on cmd prompt it would not compile javac CustomerAddress.java compiles fine then since Customer depends on CustomerAddress i give javac -cp . Customer.java but the compiler complains error cannot find symbol CustomerAddress Thanks

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• Remote Development With Solaris Studio

  - by rchrd

  A new technical article has been published on OTN: How to Develop Code from a Remote Desktop with Oracle Solaris Studio by Igor Nikiforov This article describes the remote desktop feature of the Oracle Solaris Studio IDE, and how to use it to compile, run, debug, and profile your code running on remote servers. Published May 2012 Introducing the IDE Desktop Distribution Determining Whether You Need the Desktop Distribution Creating the Desktop Distribution Using the Desktop Distribution See Also About the Author Introducing the IDE Desktop Distribution Sun Studio 12 Update 1 introduced a unique remote development feature that allows you to run just one instance of the IDE while working with multiple servers and platforms. For example, you could run the IDE on an x86-based laptop or desktop running Oracle Linux, and use a SPARC-based server running Oracle Solaris 10 to compile, run, debug, and profile your code. The IDE works seamlessly just as if you had the Oracle Solaris operating system on your laptop or desktop. ....read more

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• TDD - Red-Light-Green_Light:: A critical view

  - by Renso

  Subject: The concept of red-light-green-light for TDD/BDD style testing has been around since the dawn of time (well almost). Having written thousands of tests using this approach I find myself questioning the validity of the principle The issue: False positive or a valid test strategy that can be trusted? A critical view: I agree that the red-green-light concept has some validity, but who has ever written 2000 tests for a system that goes through a ton of chnages due to the organic nature fo the application and does not have to change, delete or restructure their existing tests? If you asnwer to the latter question is" "Yes I had a situation(s) where I had to refactor my code and it caused me to have to rewrite/change/delete my existing tests", read on, else press CTRL+ALT+Del :-) Once a test has been written, failed the test (red light), and then you comlpete your code and now get the green light for the last test, the test for that functionality is now in green light mode. It can never return to red light again as long as the test exists, even if the test itself is not changed, and only the code it tests is changed to fail the test. Why you ask? because the reason for the initial red-light when you created the test is not guaranteed to have triggered the initial red-light result for the same reasons it is now failing after a code change has been made. Furthermore, when the same test is changed to compile correctly in case of a compile-breaking code change, the green-light once again has been invalidated. Why? Because there is no guarantee that the test code fix is in the same green-light state as it was when it first ran successfully. To make matters worse, if you fix a compile-breaking test without going through the red-light-green-light test process, your test fix is essentially useless and very dangerous as it now provides you with a false-positive at best. Thinking your code has passed all tests and that it works correctly is far worse than not having any tests at all, well at least for that part of the system that the test-code represents. What to do? My recommendation is to delete the tests affected, and re-create them from scratch. I have to agree. Hard to do and justify if it has a significant impact on project deadlines. What do you think?

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• Where are classpath, path and pathelement documented in Ant version 1.8.0?

  - by Robert Menteer

  I'm looking over the documentation that comes with Apache Ant version 1.8.0 and can't find where classpath, path and pathelement are documented. I've found a page that describes path like structures but it doesn't list the valid attributes or nested elements for these. Another thing I can't find in the documentation is a description of the relationships between filelist, fileset, patternset and path and how to convert them back and forth. For instance there has to be an easier way to compile only those classes in one package while removing all class dependencies on the package classes and update documentation. <!-- Get list of files in which we're interested. --> <fileset id = "java.source.set" dir = "${src}"> <include name = "**/Package/*.java" /> </fileset> <!-- Get a COMMA separated list of classes to compile. --> <pathconvert property = "java.source.list" refid = "java.source.set" pathsep = ","> <globmapper from = "${src}/*.@{src.extent}" to = "*.class" /> </pathconvert> <!-- Remove ALL dependencies on package classes. --> <depend srcdir = "${src}" destdir = "${build}" includes = "${java.source.list}" closure = "yes" /> <!-- Get a list of up to date classes. --> <fileset id = "class.uptodate.set" dir = "${build}"> <include name = "**/*.class" /> </fileset> <!-- Get list of source files for up to date classes. --> <pathconvert property = "java.uptodate.list" refid = "class.uptodate.set" pathsep = ","> <globmapper from="${build}/*.class" to="*.java" /> </pathconvert> <!-- Compile only those classes in package that are not up to date. --> <javac srcdir = "${src}" destdir = "${build}" classpathref = "compile.classpath" includes = "${java.source.list}" excludes = "${java.uptodate.list}"/> <!-- Get list of directories of class files for package. --: <pathconvert property = "class.dir.list" refid = "java.source.set" pathsep = ","> <globmapper from = "${src}/*.java" to = "${build}*" /> </pathconvert> <!-- Convert directory list to path. --> <path id = "class.dirs.path"> <dirset dir = "${build}" includes = "class.dir.list" /> </path> <!-- Update package documentation. --> <jdepend outputfile = "${docs}/jdepend-report.txt"> <classpath refid = "compile.classpath" /> <classpath location = "${build}" /> <classespath> <path refid = "class.dirs.path" /> </classespath> <exclude name = "java.*" /> <exclude name = "javax.*" /> </jdepend> Notice there's a number of conversions between filesets, paths and comma separated list just to get the proper 'type' required for the different ant tasks. Is there a way to simplify this while still processing the fewest files in a complex directory structure?

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• runtime error: invalid memory address or nil pointer dereference

  - by Klink

  I want to learn OpenGL 3.0 with golang. But when i try to compile some code, i get many errors. package main import ( "os" //"errors" "fmt" //gl "github.com/chsc/gogl/gl33" //"github.com/jteeuwen/glfw" "github.com/go-gl/gl" "github.com/go-gl/glfw" "runtime" "time" ) var ( width int = 640 height int = 480 ) var ( points = []float32{0.0, 0.8, -0.8, -0.8, 0.8, -0.8} ) func initScene() { gl.Init() gl.ClearColor(0.0, 0.5, 1.0, 1.0) gl.Enable(gl.CULL_FACE) gl.Viewport(0, 0, 800, 600) } func glfwInitWindowContext() { if err := glfw.Init(); err != nil { fmt.Fprintf(os.Stderr, "glfw_Init: %s\n", err) glfw.Terminate() } glfw.OpenWindowHint(glfw.FsaaSamples, 1) glfw.OpenWindowHint(glfw.WindowNoResize, 1) if err := glfw.OpenWindow(width, height, 0, 0, 0, 0, 32, 0, glfw.Windowed); err != nil { fmt.Fprintf(os.Stderr, "glfw_Window: %s\n", err) glfw.CloseWindow() } glfw.SetSwapInterval(1) glfw.SetWindowTitle("Title") } func drawScene() { for glfw.WindowParam(glfw.Opened) == 1 { gl.Clear(gl.COLOR_BUFFER_BIT) vertexShaderSrc := `#version 120 attribute vec2 coord2d; void main(void) { gl_Position = vec4(coord2d, 0.0, 1.0); }` vertexShader := gl.CreateShader(gl.VERTEX_SHADER) vertexShader.Source(vertexShaderSrc) vertexShader.Compile() fragmentShaderSrc := `#version 120 void main(void) { gl_FragColor[0] = 0.0; gl_FragColor[1] = 0.0; gl_FragColor[2] = 1.0; }` fragmentShader := gl.CreateShader(gl.FRAGMENT_SHADER) fragmentShader.Source(fragmentShaderSrc) fragmentShader.Compile() program := gl.CreateProgram() program.AttachShader(vertexShader) program.AttachShader(fragmentShader) program.Link() attribute_coord2d := program.GetAttribLocation("coord2d") program.Use() //attribute_coord2d.AttribPointer(size, typ, normalized, stride, pointer) attribute_coord2d.EnableArray() attribute_coord2d.AttribPointer(0, 3, false, 0, &(points[0])) //gl.DrawArrays(gl.TRIANGLES, 0, len(points)) gl.DrawArrays(gl.TRIANGLES, 0, 3) glfw.SwapBuffers() inputHandler() time.Sleep(100 * time.Millisecond) } } func inputHandler() { glfw.Enable(glfw.StickyKeys) if glfw.Key(glfw.KeyEsc) == glfw.KeyPress { //gl.DeleteBuffers(2, &uiVBO[0]) glfw.Terminate() } if glfw.Key(glfw.KeyF2) == glfw.KeyPress { glfw.SetWindowTitle("Title2") fmt.Println("Changed to 'Title2'") fmt.Println(len(points)) } if glfw.Key(glfw.KeyF1) == glfw.KeyPress { glfw.SetWindowTitle("Title1") fmt.Println("Changed to 'Title1'") } } func main() { runtime.LockOSThread() glfwInitWindowContext() initScene() drawScene() } And after that: panic: runtime error: invalid memory address or nil pointer dereference [signal 0xb code=0x1 addr=0x0 pc=0x41bc6f74] goroutine 1 [syscall]: github.com/go-gl/gl._Cfunc_glDrawArrays(0x4, 0x7f8500000003) /tmp/go-build463568685/github.com/go-gl/gl/_obj/_cgo_defun.c:610 +0x2f github.com/go-gl/gl.DrawArrays(0x4, 0x3, 0x0, 0x45bd70) /tmp/go-build463568685/github.com/go-gl/gl/_obj/gl.cgo1.go:1922 +0x33 main.drawScene() /home/klink/Dev/Go/gogl/gopher/exper.go:85 +0x1e6 main.main() /home/klink/Dev/Go/gogl/gopher/exper.go:116 +0x27 goroutine 2 [syscall]: created by runtime.main /build/buildd/golang-1/src/pkg/runtime/proc.c:221 exit status 2

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• compiling compat-wireless fails at 'make' with 'make: *** [modules] Error 2'

  - by Paul Carter

  Trying to compile the compat-wireless-2012-09-25 driver module, without success. scrips/driver-select alx ; works make ; fails - scripts/Makefile.build:44 ~/sourcecode/compat-wireless-2012-09-25.2/drivers/net/ethernet/atheros/alx/Makefile: No such file or directory make[4]: ** No rule to make target '~/sourcecode/compat-wireless-2012-09-25.2/drivers/net/ethernet/atheros/alx/Makefile'. Stop. [snip] make: * [modules] Error 2 Device is Atheros AR8161 wired ethernet in a Dell Vostro 3460. I'd be very grateful for assistance in getting this to compile.

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• Having trouble compiling UnrealScript with defaultproperties

  - by Enchanter

  Have just started scripting in Unreal Script and am following the instructions of the opening chapter of a book on the subject. I have set the development tools up as described in the book such that it is now possible to compile the scripts for UDK before adding them to a level. My issue is: the very first script the book asks you to compile is the following: class AwesomeActor extends Actor placeable; defaultproperties { Begin Object Class=SpriteComponent Name = Sprite Sprite = Texture2D'EditorResources.S_NavP' End Object Components.Add(Sprite) } And when I hit F9 in the compiler I get the following error message: Error, BEGIN OBJECT: Must specify valid name for suboject/copmponent: Begin Object class=SpriteComponent name = Sprite My question: As far as I'm aware I've copied the code from the book veribatim including capital and smaller case letters but I'm getting this error and I was wondering if anyone knew why and if so how I would fix it?

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