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  • Replace LinkedList element value through LinkedList.Enumerator

    - by Yan Cheng CHEOK
    I realize there are no way for me to replace value through LinkedList.Enumerator. For instead, I try to port the below Java code to C# // Java ListIterator<Double> itr1 = linkedList1.listIterator(); ListIterator<Double> itr2 = linkedList2.listIterator(); while(itr1.hasNext() && itr2.hasNext()){ Double d = itr1.next() + itr2.next(); itr1.set(d); } // C# LinkedList<Double>.Enumerator itr1 = linkedList1.GetEnumerator(); LinkedList<Double>.Enumerator itr2 = linkedList2.GetEnumerator(); while(itr1.MoveNext() && itr2.MoveNext()){ Double d = itr1.Current + itr2.Current; // Opps. Compilation error! itr1.Current = d; } Any other technique I can use?

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  • Compressing assets post-update with Subversion

    - by Oskar Krawczyk
    I'm trying to find a way to compress specific assets post-update on a Production server. So far, I can't find any way to do this that's even remotely simple. Anyone has any insights/experience in doing this? Basically, what I need to do is run a Java utility to compress CSS and JS files - the problem with JS files is that they may or might not validate (JS errors), if it doesn't validate the Java utility will throw output a message. This makes the whole idea a bit more complicated.

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  • 'Set = new HashSet' or 'HashSet = new Hashset'?

    - by Pureferret
    I'm intialising a HashSet like so in my program: Set<String> namesFilter = new HashSet<String>(); Is this functionally any different if I initilise like so? HashSet<String> namesFilter = new HashSet<String>(); I've read this about the collections interface, and I understand interfaces (well, except their use here). I've read this excerpt from Effective Java, and I've read this SO question, but I feel none the wiser. Is there a best practice in Java, and if so, why? My intuition is that it makes casting to a different type of Set easier in my first example. But then again, you'd only be casting to something that was a collection, and you could convert it by re-constructing it.

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  • How to use Scala interpreter options with SBT?

    - by John Threepwood
    When using the Scala interpreter, one could start it with an option like: C:\Users\John>scala -unchecked Welcome to Scala version 2.9.2 (Java HotSpot(TM) Client VM, Java 1.6.0_32). Type in expressions to have them evaluated. Type :help for more information. scala> When using sbt, how can one start the Scala interpreter with options ? The following try will not work: C:\Users\John\Test Scala Project 1>sbt [...] [info] Loading global plugins from C:\Users\John\.sbt\plugins [info] Set current project to default-8d4ecc (in build file:/C:/Users/John/Tes t%20Scala%20Project%201/) > console -unchecked [error] Expected end of input. [error] console -unchecked [error] ^ With Google & Co I could not figure out how to do this from within the sbt shell. Does anyone know ?

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  • ANTLR JavaScript Target

    - by kunalsawlani
    Hello, I have been using ANTLR to generate a parser + tree grammar for a mark up language with Java target which works fine. Now I am trying to get the target in JavaScript to use it in my web browser. However, I have not been able to locate any good documentation on how to go about doing this. I am using eclipse with ANTLR IDE, and when i specify the language as JavaScript, I get the following errors. Multiple markers at this line (10): internal error: group JavaScript does not satisfy interface ANTLRCore: mismatched arguments on these templates [treeParser(grammar, name, scopes, tokens, tokenNames, globalAction, rules, numRules, bitsets, labelType, ASTLabelType, superClass, members, filterMode)] (10): internal error: java.util.NoSuchElementException: no such attribute: filterMode in template context [treeParser] If anyone could help me out with this or point me to some material which I could read about the JavaScript target with ANTLR, it would be great. Thanks

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  • What are good memory management techniques in Flash/as3

    - by Parris
    Hello! So I am pretty familiar with memory management in Java, C and C++; however, in flash what constructs are there for memory management? I assume flash has a sort of virtual machine like java, and I have been assuming that things get garbage collected when they are set to null. I am not sure if this is actually the case though. Also is there a way to force garbage collection in Flash? Any other tips? Thanks

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  • Textarea for my web application

    - by Parhs
    Hello ... I am developing an application web based which would let the users extend a part of an applcation using javascript via java.scripting http://java.sun.com/javase/6/docs/technotes/guides/scripting/programmer_guide/index.html The problem is that the user should write only some coditions and i want if possible to colour some special words and to check while typing if the variable that the user is typing exists.. Like a auto suggest thing... I searched at the web but didnt find many stuff. For WYSIWYG editors i couldnt determine if you can programaticcaly apply stuff and set/get caret position. Also i show that autosuggest is nearly impossible. It should be locatted outside of the textbox area.

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  • How do you mock a Sealed class?

    - by Brett Veenstra
    Mocking sealed classes can be quite a pain. I currently favor an Adapter pattern to handle this, but something about just keeps feels weird. So, What is the best way you mock sealed classes? Java answers are more than welcome. In fact, I would anticipate that the Java community has been dealing with this longer and has a great deal to offer. But here are some of the .NET opinions: Why Duck Typing Matters for C# Develoepers Creating wrappers for sealed and other types for mocking Unit tests for WCF (and Moq)

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  • Dell Studio 1737 Overheating

    - by Sean
    I am using a Dell Studio 1737 laptop. I have been running Linux and have ran Windows recently for a very long time. I upgraded to the 10.10 distribution and since that distro, it seems that for some reason all Linuxes want to push my laptop to extremes. I have recently upgraded to Ubuntu 12.04 since I heart that it contains kernel fixes for overheating issues. 12.04 will actually eventually cool the system, but that is after the fans run to the point it sounds like a jet aircraft taking off and the laptop makes my hands sweat. In trying to combat the heat problems I have done the following: I installed the propriatery driver for my ATI Mobility HD 3600. I have tried both the one in the Additional Drivers and also tried ATI's latest greatest version. If I don't install this my laptop will overheat and shut off in minutes. Both seem to perform similarly, but the heat problem remains. I have tried limiting the CPU by installing the CPUFreq Indicator. This does help keep the machine from shutting off, but the heat is still uncomfortable to be around the machine. I usually run in power saver mode or run the cpu at 1.6 GHZ just to error on safety. I ran sensors-detect and here are the results: sean@sean-Studio-1737:~$ sudo sensors-detect # sensors-detect revision 5984 (2011-07-10 21:22:53 +0200) # System: Dell Inc. Studio 1737 (laptop) # Board: Dell Inc. 0F237N This program will help you determine which kernel modules you need to load to use lm_sensors most effectively. It is generally safe and recommended to accept the default answers to all questions, unless you know what you're doing. Some south bridges, CPUs or memory controllers contain embedded sensors. Do you want to scan for them? This is totally safe. (YES/no): y Module cpuid loaded successfully. Silicon Integrated Systems SIS5595... No VIA VT82C686 Integrated Sensors... No VIA VT8231 Integrated Sensors... No AMD K8 thermal sensors... No AMD Family 10h thermal sensors... No AMD Family 11h thermal sensors... No AMD Family 12h and 14h thermal sensors... No AMD Family 15h thermal sensors... No AMD Family 15h power sensors... No Intel digital thermal sensor... Success! (driver `coretemp') Intel AMB FB-DIMM thermal sensor... No VIA C7 thermal sensor... No VIA Nano thermal sensor... No Some Super I/O chips contain embedded sensors. We have to write to standard I/O ports to probe them. This is usually safe. Do you want to scan for Super I/O sensors? (YES/no): y Probing for Super-I/O at 0x2e/0x2f Trying family `National Semiconductor/ITE'... No Trying family `SMSC'... No Trying family `VIA/Winbond/Nuvoton/Fintek'... No Trying family `ITE'... No Probing for Super-I/O at 0x4e/0x4f Trying family `National Semiconductor/ITE'... Yes Found `ITE IT8512E/F/G Super IO' (but not activated) Some hardware monitoring chips are accessible through the ISA I/O ports. We have to write to arbitrary I/O ports to probe them. This is usually safe though. Yes, you do have ISA I/O ports even if you do not have any ISA slots! Do you want to scan the ISA I/O ports? (YES/no): y Probing for `National Semiconductor LM78' at 0x290... No Probing for `National Semiconductor LM79' at 0x290... No Probing for `Winbond W83781D' at 0x290... No Probing for `Winbond W83782D' at 0x290... No Lastly, we can probe the I2C/SMBus adapters for connected hardware monitoring devices. This is the most risky part, and while it works reasonably well on most systems, it has been reported to cause trouble on some systems. Do you want to probe the I2C/SMBus adapters now? (YES/no): y Using driver `i2c-i801' for device 0000:00:1f.3: Intel ICH9 Module i2c-i801 loaded successfully. Module i2c-dev loaded successfully. Now follows a summary of the probes I have just done. Just press ENTER to continue: Driver `coretemp': * Chip `Intel digital thermal sensor' (confidence: 9) To load everything that is needed, add this to /etc/modules: #----cut here---- # Chip drivers coretemp #----cut here---- If you have some drivers built into your kernel, the list above will contain too many modules. Skip the appropriate ones! Do you want to add these lines automatically to /etc/modules? (yes/NO)y Successful! Monitoring programs won't work until the needed modules are loaded. You may want to run 'service module-init-tools start' to load them. Unloading i2c-dev... OK Unloading i2c-i801... OK Unloading cpuid... OK sean@sean-Studio-1737:~$ sudo service module-init-tools start module-init-tools stop/waiting I also tried installing i8k but that didn't work since it didn't seem to be able to communicate with the hardware (probably for different kind of device). Also I ran acpi -V and here are the results: Battery 0: Full, 100% Battery 0: design capacity 613 mAh, last full capacity 260 mAh = 42% Adapter 0: on-line Thermal 0: ok, 49.0 degrees C Thermal 0: trip point 0 switches to mode critical at temperature 100.0 degrees C Thermal 1: ok, 48.0 degrees C Thermal 1: trip point 0 switches to mode critical at temperature 100.0 degrees C Thermal 2: ok, 51.0 degrees C Thermal 2: trip point 0 switches to mode critical at temperature 100.0 degrees C Cooling 0: LCD 0 of 15 Cooling 1: Processor 0 of 10 Cooling 2: Processor 0 of 10 I have hit a wall and don't know what to do now. Any advice is appreciated.

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  • double checked locking - objective c

    - by bandejapaisa
    I realised double checked locking is flawed in java due to the memory model, but that is usually associated with the singleton pattern and optimizing the creation of the singleton. What about under this case in objective-c: I have a boolean flag to determine if my application is streaming data or not. I have 3 methods, startStreaming, stopStreaming, streamingDataReceived and i protect them from multiple threads using: - (void) streamingDataReceived:(StreamingData *)streamingData { if (self.isStreaming) { @synchronized(self) { if (self.isStreaming) { - (void) stopStreaming { if (self.isStreaming) { @synchronized(self) { if (self.isStreaming) { - (void) startStreaming:(NSArray *)watchlistInstrumentData { if (!self.isStreaming) { @synchronized(self) { if (!self.isStreaming) { Is this double check uneccessary? Does the double check have similar problems in objective-c as in java? What are the alternatives to this pattern (anti-pattern). Thanks

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  • C# WCF/WebService: Interoperable exception handling.

    - by michael paul
    I understand that WCF will convert an exception into a fault and send it back as a SOAP message, but I was wondering if this is truly interoperable. I guess I'm having a tough time trying to figure out this possible scenario: Client (Java) calls a WCF Service (LoginService). Server checks for proper authorization, user authorization fails. Server throws an UnauthorizedAccessException. WCF converts this into a Fault somehow. (* - See Below As Well) Client has to be able to know how to read this Fault. I guess I'm just having a tough time understanding how this could still be interoperable because it is expecting Java to know how to translate a SOAP Fault that .NET encodes from an UnauthorizedAccessException. Also, how does .NET actually convert the exception to a fault, what goes in as the fault code, name, etc. Some of the things seem to be "duh"s like perhaps the Fault Name is "UnauthorizedAccessException", but I'd rather know for sure than guess.

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  • Software to Tune/Calibrate Properties for Heuristic Algorithms

    - by Karussell
    Today I read that there is a software called WinCalibra (scroll a bit down) which can take a text file with properties as input. This program can then optimize the input properties based on the output values of your algorithm. See this paper or the user documentation for more information (see link above; sadly doc is a zipped exe). Do you know other software which can do the same which runs under Linux? (preferable Open Source) EDIT: Since I need this for a java application I will now invest my research in java libraries like jgap. Other ideas and links would be appreciated!

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  • Lazy loading of ESB in a jruby rails app

    - by brad
    I have a jruby/rails app using: jruby 1.4.0 Rails 2.3.5 ActiveMQ 5.3.0 Mule ESB 2.2.1 Currently in our environment.rb file we start up Mule in the initializer. This becomes a big pain when we go to do normal rake tasks that don't require JMS/Mule such as db:migrate as it takes a long time to startup/shutdown Mule everytime. The code is similar to this: APP_CONTEXT = Java::our.company.package.service_clients.Initializer.getAppContext(MULE_CONFIG_PATH) And we use APP_CONTEXT to fetch the bean to connect to the appropriate service. I'm trying to figure out some mechanism by which APP_CONTEXT could be lazily instantiated (not in initialize) to avoid all of the pains of having to startup Mule on initialize. Currently we have a few ruby client classes that are instantiated as a before_filter in application_controller such as @data_service = DataService.new(APP_CONTEXT) that initialize the proper java client for each request for use in our controllers. I'm open to all suggestions. I'm having a hard time trying to find the right place to put this lazy instantiation.

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  • Maven jaxb2:xjc/jaxws:wsimport to be added in eclipse?

    - by wuntee
    I have a library I am creating based on some WSDL/XSD definitions. I am having a problem having the compiled classes added in the eclipse project. I can see that with a 'mvn compile' that the .class files are generated, as well as the .java files. The problem is that even though the .class files are generated, eclipse is still showing an error on the import statement "import com.whatever.SomeService_Service" that was generated by one of the plugins. I tried forcing the source to go into the project/src/main/java directory, but when the project is cleaned, it deletes files that I have created. Has anyone run into this before/found a way to get it to recognize that the class files are there? Thanks.

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  • Characters problem in Bit.ly

    - by Fevos
    Hello, When i try to shorten a link with "#,&" Character i got an exception. is there a way to handle them . this is a sample of code that works String shortUrl = bitly.getShortUrl("http://z"); //Works but if i add for example '&' or '%25' to the string it will produce exption : - String shortUrl = bitly.getShortUrl("http://z%26"); // Exception - String shortUrl = bitly.getShortUrl("http://z&"); // Exception the getShortUrl function form this Java class: http://github.com/finnjohnsen/BitlyAndroid/raw/master/src/com/finnjohnsen/bitlyandroid/test/BitlyAndroid.java Thanks

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  • Scala type conversion error, need help!

    - by Mansoor Ashraf
    Hello I am getting a weird error when trying to use a Java map in Scala. This is the snippet of code val value:Double = map.get(name) if (value eq null) map.put(name, time) else map.put(name, value + time) the map is defined as val map=new ConcurrentHashMap[String,Double] and this is the error I am getting error: type mismatch; found : Double required: ?{val eq: ?} Note that implicit conversions are not applicable because they are ambiguous: both method double2Double in object Predef of type (Double)java.lang.Double and method doubleWrapper in object Predef of type (Double)scala.runtime.RichDouble are possible conversion functions from Double to ?{val eq: ?} if (value eq null) map.put(name, time) I am new to Scala so I am having a hard time parsing the stacktrace. Any help would be appreciated

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  • Missing taglibrary in Netbeans Hibernate tutorial xhtml file?

    - by Christopher W. Allen-Poole
    I just finished the Netbeans introduction to Hibernate tutorial ( http://netbeans.org/kb/docs/web/hibernate-webapp.html#01 ) and I am getting the following error: "This page calls for XML namespace declared with prefix br but no taglibrary exists" Now, I have seen a similar question somewhere else: http://forums.sun.com/thread.jspa?threadID=5430327 but the answer is not listed there. Or, if it is, then I am clearly missing it -- line one of my index.xhtml file reads "http://www.w3.org/1999/xhtml". It also does not explain why, when I reload localhost:8080, the message disappears. Here is my index.xhtml file: <html xmlns="http://www.w3.org/1999/xhtml" xmlns:h="http://java.sun.com/jsf/html" xmlns:ui="http://java.sun.com/jsf/facelets" xmlns:f="http://java.sun.com/jsf/core"> <ui:composition template="./template.xhtml"> <ui:define name="body"> <h:form> <h:commandLink action="#{filmController.previous}" value="Previous #{filmController.pageSize}" rendered="#{filmController.hasPreviousPage}"/> <h:commandLink action="#{filmController.next}" value="Next #{filmController.pageSize}" rendered="#{filmController.hasNextPage}"/> <h:dataTable value="#{filmController.filmTitles}" var="item" border="0" cellpadding="2" cellspacing="0" rowClasses="jsfcrud_odd_row,jsfcrud_even_row" rules="all" style="border:solid 1px"> <h:column> <f:facet name="header"> <h:outputText value="Title"/> </f:facet> <h:outputText value="#{item.title}"/> </h:column> <h:column> <f:facet name="header"> <h:outputText value="Description"/> </f:facet> <h:outputText value="#{item.description}"/> </h:column> <h:column> <f:facet name="header"> <h:outputText value=" "/> </f:facet> <h:commandLink action="#{filmController.prepareView}" value="View"/> </h:column> </h:dataTable> <br/> </h:form> </ui:define> </ui:composition> </html>

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  • ffmpeg problem in ubuntu (libavcodec.so)

    - by lyuba
    I run Ubuntu and try to use the ffmpeg wrapper in Java from here: http://code.google.com/p/javacv/ It seems to work fine on other systems, but in Ubuntu the project crashes with the following mistake: Exception in thread "main" java.lang.UnsatisfiedLinkError: Error looking up function 'avcodec_decode_video2': /usr/lib/i686/cmov/libavcodec.so: undefined symbol: avcodec_decode_video2 ffmpeg is working great from the command line, though. JavaCV author recommended me to check this link: http://linux-tipps.blogspot.com/2009/05/pretending-package-is-installed-by.html Probably I'm doing something wrong, but it cannot reinstall libavcodec51 like this. So the questions are: 1. Is those solution above a good one so I should bring it to success somehow? 2. What are the other ways to solve the problem? Thank you for your suggestions in advance!

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  • How to retain service settings through InstallShield upgrade install

    - by sjohnston
    I have an InstallScript project in IS2010. It has a handful of services that get installed. Some are C++ exes and use the "InstallShield Object for NT Services". Others are Java apps installed as services with Java Service Wrapper through LaunchAppAndWait command line calls. Tomcat is also being installed as a service through a call to its service.bat. When the installer runs in upgrade mode, the services are reinstalled, and the settings (auto vs. manual startup, restart on fail, log-on account, etc.) are reverted to the defaults. I would like to save the service settings before the file transfer and then repopulate them afterward, but I haven't been able to find a good mechanism to do this. How can I save and restore the service settings?

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  • Hadoop or Hadoop Streaming for MapReduce on AWS

    - by aeolist
    I'm about to start a mapreduce project which will run on AWS and I am presented with a choice, to either use Java or C++. I understand that writing the project in Java would make more functionality available to me, however C++ could pull it off too, through Hadoop Streaming. Mind you, I have little background in either language. A similar project has been done in C++ and the code is available to me. So my question: is this extra functionality available through AWS or is it only relevant if you have more control over the cloud? Is there anything else I should bear in mind in order to make a decision, like availability of plugins for hadoop that work better with one language or the other? Thanks in advance

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  • What is the need of functional programming?

    - by Lazer
    I have read about functional programming which is stateless, gives the same result invocation after invocation, about closures and other related concepts. I still feel that I have very little idea what these things are about. Thinking about this, right now, I feel complete in C, C++, and Java. Any programming problem and I start thinking in one of these languages. So, I never feel and understand the need for functional languages. A good starting point therefore would be to try to understand some things that are not possible in imperative languages but possible in functional languages. I feel unless I understand where exactly functional languages fit inside my already complete world of C, C++ and Java, I would never be able to appreciate and understand them. So, can somebody help me understand the real need for functional programming? Where exactly do they fit in?

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  • Android: videocamera, limit length of videos taken

    - by AP257
    I'm working in Android and starting the video camera activity using ACTION_VIDEO_CAPTURE. Is there any way I can limit the length (in time) of the videos the user can take? I think this is possible if you use MediaRecorder, but I don't really fancy doing that since it's so much more complicated than using the simple ACTION_VIDEO_CAPTURE. Current code: Intent videoCaptureIntent = new Intent(MediaStore.ACTION_VIDEO_CAPTURE); startActivityForResult(videoCaptureIntent,1); If it's not possible, does anyone know whether I could set a timer (TimerTask?) in Java and then show a Toast message after a certain length of time warning the user that they need to stop filming? (I'm a Java newbie, so I don't know if this is exactly what I need.)

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  • Organizing a project that uses multiple languages?

    - by calid
    I am currently working on a project that has components in perl, .NET, C/C++, and Java. These components are inter-related, but are not tied to the same release schedule. Due to the very different build/testing environment requirements, lumping them all in to the same /bin /src /lib /etc /tests hierarchy is a bit unwieldy. What are some good organizational hierarchies to use in source control when dealing with a project of this nature? I am currently leaning towards each language having its own branch: repo/project1/perl/main/... repo/project1/.NET/main/... repo/project1/Java/main/... How would your recommended hierarchy change if they DID have a tied release schedule?

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  • FileReader vs FileInputReader. split vs Pattern

    - by abdeslam
    I'm working with a file with about 2G. I want to read the file line by line to find some specific terms. Whitch class can I better use: FileReader or FileInputStream? And how can I find the specific words efficiently. I'm just using the split() method, but may be can I use the java.util.regex.Pattern class in combination with java.util.regex.Matcher class. So the Questions are: which class can I use: the FileReader or the FileInputStream? can I use the split method or the regex classes Does someone has an answer to this questions? Thans.

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  • Consuming Web Services requiring Authentication from behind Proxy server

    - by Jan Petersen
    Hi All, I've seen a number of post about Proxy Authentication, but none that seams to address this problem. I'm building a SharePoint Web Service consuming desktop application, using Java, JAX-WS in NetBeans. I have a working prototype, that can query the server for authentication mode, successfully authenticate and retrieve a list of web site. However, if I run the same app from a network that is behind a proxy server (the proxy does not require authentication), then I'm running into trouble. The normal -dhttp.proxyHost ... settings does not seam to help any. But I have found that by creating a ProxySelector class and setting it as default, I can regain access to the authentication web service, but I still can't retrieve the list of web sites from the SharePoint server. It's almost as if the authentication I provide is going to the proxy rather than the SharePoint server. Anyone have any experience on how to make this work? I have put the source text java class files of a demo app up, showing the issue at the following urls (it's a bit to long even in the short demo form to post here). link text When running the code from a network behind a proxy server, I successfully retrieve the Authentication mode from the server, but the request for the Web Site list generates an exception originating at: com.sun.xml.internal.ws.transport.http.client .HttpClientTransport.readResponseCodeAndMessage(HttpClientTransport.java:201) The output from the source when no proxy is on the network is listed below: Successfully retrieved the SharePoint WebService response for Authentication SharePoint authentication method is: WINDOWS Calling Web Service to retrieve list of web site. Web Service call response: -------------- XML START -------------- <Webs xmlns="http://schemas.microsoft.com/sharepoint/soap/"> <Web Title="Collaboration Lab" Url="http://host.domain.com/collaboration"/> <Web Title="Global Data Lists" Url="http://host.domain.com/global_data_lists"/> <Web Title="Landing" Url="http://host.domain.com/Landing"/> <Web Title="SharePoint HelpDesk" Url="http://host.domain.com/helpdesk"/> <Web Title="Program Management" Url="http://host.domain.com/programmanagement"/> <Web Title="Project Site" Url="http://host.domain.com/Project Site"/> <Web Title="SharePoint Administration Tools" Url="http://host.domain.com/admin"/> <Web Title="Space Management Project" Url="http://host.domain.com/spacemgmt"/> </Webs> -------------- XML END -------------- Br Jan

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