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  • packaging and distributing Python code as executables

    - by user248237
    How can I compile my python module into an executable, and distribute it in a way that doesn't require the user to download all the external Python packages that the module I wrote uses? Aside from that, is there a general guy on packaging and distributing python code? i.e. going from a script/module to someone that's user-friendly and can be run, ideally cross-platform (at least between unix and mac). thanks.

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  • GCC how to block system calls within a program?

    - by CMPITG
    Does anyone tell me how to block system calls within a program, please? I am building a system which takes a piece of C source code, compiles it with gcc and runs it. For security reasons, I need to prevent the compiled program from calling system calls. Is there any way to do it, from the source code level (e.g. stripping the header files of gcc, detecting malicious external calls, ...) to the executable level?

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  • Mouse pointer plug in

    - by user171523
    I am developing a website where i am using CSS based layouts with absoulate positions. I would like to know is there any plug in for IE 8 which will tell based on the mouse where i am moving with the position (In Pixels). I want to know with out any JS. I am looking is there any external plug in which will allow me to find out the position.

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  • FQL or Facebook API: Get only my events created

    - by user347466
    Guys.. i have this query: select eid from event where creator = 100000956216009 Return this error: error: 604 Your statement is not indexable. The WHERE clause must contain an indexable column. Such columns are marked with * in the tables linked from http://wiki.developers.facebook.com/index.php/FQL_Tables How i can get all My Created events? TIA I need to print my events created on my fb account and print it on my External Site.

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  • Does Android platform support SpatiaLite?

    - by Stan
    Is it possible to use SpatiaLite database on Android platform (1.6)? I am trying to program a google buzz-like app which need to take advantage of SpatiaLite functions, like calculating distance between 2 points, etc. Any external library needed? Thanks.

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  • Visual Studio macro to navigate to T4MVC link

    - by shannon
    I use T4MVC and I'm happy with it and want to keep it - it keeps down run time defects. Unfortunately, it makes it harder to navigate to views and content (a.k.a. Views and Links in T4MVC) though. Even using Resharper, I can't navigate to the referenced item: T4MVC and Resharper Navigation Can I get a hand building a macro to do this? Never having built a VS IDE macro before, I don't have a grasp on how to get at some things, like the internal results of the "Go To Definition" process, if that's even possible. If you aren't familiar with T4MVC, here's generally what the macro might do to help: Given the token: Links.Content.Scripts.jQuery_js in the file MyView.cshtml, '(F12) Go To Definition'. This behaves properly. Having arrived at the the related assignment: public readonly string jQuery_js = "~/Content/Scripts/jQuery.js"; in a file generated by T4MVC (which is very nice, thank you David, but we really don't ever need to see), capture the string assigned and close the file. Navigate in Solution Explorer to the PhysicalPath represented by the captured string. This process would also work for views/layouts/master-pages/partials, etc. If you provide a macro or link to a macro to do this, or have another solution, wonderful. Otherwise, hints on how to do step 3 simply in a VS macro would be especially appreciated and receive upvote from me. I'd post the macro back here as an answer when done. Thanks!

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  • Why are Managed Beans not loaded in Tomcat?

    - by c0d3x
    Hi, I created a JSF 2 web application with facelets. The libs for JSF where stored at tomcat/lib, to share it between several applications. I thought maybe it would be better to store the libs inside the WEB-INF/lib folder of the application, to get the application more independent from server configurations. Now when I start tomcat via eclipse, the managed beans are loaded and working. But when I start tomcat directly / standalone the managed beans are not loaded automatically. I used @ManagedBean @SessionScoped / @RequestScoped annotations to declare classes as managed beans. Why is this? What can I do to fix it? I don't use any faces-config.xml file yet. Thanks in advance. edited: Maybe this helps to see whats going on: javax.el.PropertyNotFoundException: /Artikel.xhtml @12,108 value="#{artikelBackingBean.nameFilterPattern}": Target Unreachable, identifier 'artikelBackingBean' resolved to null at com.sun.faces.facelets.el.TagValueExpression.getType(TagValueExpression.java:93) at com.sun.faces.renderkit.html_basic.HtmlBasicInputRenderer.getConvertedValue(HtmlBasicInputRenderer.java:95) at javax.faces.component.UIInput.getConvertedValue(UIInput.java:1008) at javax.faces.component.UIInput.validate(UIInput.java:934) at javax.faces.component.UIInput.executeValidate(UIInput.java:1189) at javax.faces.component.UIInput.processValidators(UIInput.java:691) at javax.faces.component.UIForm.processValidators(UIForm.java:243) at javax.faces.component.UIComponentBase.processValidators(UIComponentBase.java:1080) at javax.faces.component.UIViewRoot.processValidators(UIViewRoot.java:1180) at com.sun.faces.lifecycle.ProcessValidationsPhase.execute(ProcessValidationsPhase.java:76) at com.sun.faces.lifecycle.Phase.doPhase(Phase.java:101) at com.sun.faces.lifecycle.LifecycleImpl.execute(LifecycleImpl.java:118) at javax.faces.webapp.FacesServlet.service(FacesServlet.java:312) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206) at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:233) at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:191) at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:433) at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:128) at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102) at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109) at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:293) at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:849) at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:583) at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:454) at java.lang.Thread.run(Thread.java:619)

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  • MSBuild script fails but produces no errors

    - by Kate
    I have a MSBuild script that I am executing through TeamCity. One of the tasks that is runs is from Xheo DeploxLX CodeVeil which obfuscates some DLLs. The task I am using is called VeilProject. I have run the CodeVeil Project through the interface manually and it works correctly, so I think I can safely assume that the actual obfuscate process is ok. This task used to take around 40 minutes and the rest of the MSBuild file executed perfectly and finished without errors. For some reason this task is now taking 1hr 20 minutes or so to execute. Once the VeilProject task is finished the output from the task says it completely successfully, however the MSBuild script fails at this point. I have a task directly after the VeilProject task and it does not get outputted. Using diagnostic output from MSBUild I can see the following: My questions are: Would it be possible that the MSBuild script has timed out? Once the task has completed it is after a certain timeout period so it just fails? Why would the build fail with no errors and no warnings? [05:39:06]: [Target "Obfuscate"] Finished. [05:39:06]: [Target "Obfuscate"] Saving exception map [05:49:21]: [Target "Obfuscate"] Ended at 11/05/2010 05:49:21, ~1 hour, 48 minutes, 6 seconds [05:49:22]: [Target "Obfuscate"] Done. [05:49:51]: MSBuild output: Ended at 11/05/2010 05:49:21, ~1 hour, 48 minutes, 6 seconds (TaskId:8) Done. (TaskId:8) Done executing task "VeilProject" -- FAILED. (TaskId:8) Done building target "Obfuscate" in project "AMK_Release.proj.teamcity.patch.tcprojx" -- FAILED.: (TargetId:12) Done Building Project "C:\Builds\Scripts\AMK_Release.proj.teamcity.patch.tcprojx" (All target(s)) -- FAILED. Project Performance Summary: 6535484 ms C:\Builds\Scripts\AMK_Release.proj.teamcity.patch.tcprojx 1 calls 6535484 ms All 1 calls Target Performance Summary: 156 ms PreClean 1 calls 266 ms SetBuildVersionNumber 1 calls 2406 ms CopyFiles 1 calls 6532391 ms Obfuscate 1 calls Task Performance Summary: 16 ms MakeDir 2 calls 31 ms TeamCitySetBuildNumber 1 calls 31 ms Message 1 calls 62 ms RemoveDir 2 calls 234 ms GetAssemblyIdentity 1 calls 2406 ms Copy 1 calls 6528047 ms VeilProject 1 calls Build FAILED. 0 Warning(s) 0 Error(s) Time Elapsed 01:48:57.46 [05:49:52]: Process exit code: 1 [05:49:55]: Build finished

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  • php insert doesnot take place

    - by reggie
    my code is as follows <?php include("config.php"); $ip=$_SERVER['REMOTE_ADDR']; if($_POST['id']) { $id=$_POST['id']; $id = mysql_escape_String($id); $ip_sql=mysql_query("select ip_add from Voting_IP where mes_id_fk='$id' and ip_add='$ip'"); $count=mysql_num_rows($ip_sql); if($count==0) { $sql = "update Messages set up=up+1 where mes_id='$id'"; mysql_query($sql); $sql_in = "insert into Voting_IP (mes_id_fk,ip_add) values ('$id','$ip')"; mysql_query($sql_in) or die(mysql_error()); echo "<script>alert('Thanks for the vote');</script>"; } else { echo "<script>alert('You have already voted');</script>"; } $result=mysql_query("select up from Messages where mes_id='$id'"); $row=mysql_fetch_array($result); $up_value=$row['up']; echo "<img src='button.png' width='110' height='90'>"; echo $up_value; } ?> My problem is that the insert process doesnot take place at all. the script tags echos an alert box. even the img tag is echoed to the web page. but the insert process doesnot take place. the config file is fine.. note: this code works on my local machine which has php 5.3 but it doesnot work on the server which has php 5.2.. any advice..???

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  • jboss Resteasy for java 5

    - by Anand
    Is there a resteasy version that runs on jdk 5 enviroment? I tried to compile my code in java 5 but it didnot work saying version problem. Is there a solution here? type Exception report message description The server encountered an internal error () that prevented it from fulfilling this request. exception javax.servlet.ServletException: Error instantiating servlet class org.jboss.resteasy.plugins.server.servlet.HttpServletDispatcher org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:117) org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:174) org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:879) org.apache.coyote.http11.Http11BaseProtocol$Http11ConnectionHandler.processConnection(Http11BaseProtocol.java:665) org.apache.tomcat.util.net.PoolTcpEndpoint.processSocket(PoolTcpEndpoint.java:528) org.apache.tomcat.util.net.LeaderFollowerWorkerThread.runIt(LeaderFollowerWorkerThread.java:81) org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.java:689) java.lang.Thread.run(Thread.java:595) root cause java.lang.UnsupportedClassVersionError: Bad version number in .class file (unable to load class javax.ws.rs.core.UriInfo) org.apache.catalina.loader.WebappClassLoader.findClassInternal(WebappClassLoader.java:1964) org.apache.catalina.loader.WebappClassLoader.findClass(WebappClassLoader.java:933) org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1405) org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1284) java.lang.ClassLoader.loadClassInternal(ClassLoader.java:320) java.lang.Class.getDeclaredConstructors0(Native Method) java.lang.Class.privateGetDeclaredConstructors(Class.java:2357) java.lang.Class.getConstructor0(Class.java:2671) java.lang.Class.newInstance0(Class.java:321) java.lang.Class.newInstance(Class.java:303) org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:117) org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:174) org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:879) org.apache.coyote.http11.Http11BaseProtocol$Http11ConnectionHandler.processConnection(Http11BaseProtocol.java:665) org.apache.tomcat.util.net.PoolTcpEndpoint.processSocket(PoolTcpEndpoint.java:528) org.apache.tomcat.util.net.LeaderFollowerWorkerThread.runIt(LeaderFollowerWorkerThread.java:81) org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.java:689) java.lang.Thread.run(Thread.java:595) note The full stack trace of the root cause is available in the Apache Tomcat/5.5.31 logs.

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  • Impossible to remove directory

    - by Mark
    Evidently I've never had to delete a directory using win32 sdk before, because its apparently an impossible task. I've tried anything and everything - RemoveDirectory, SHFileOperation with FO_DELETE, etc. Currently I call CreateDirectory in one thread, start another thread, copy some files to this directory in the new thread, then delete all the files in the directory in the new thread, and then back in the original thread that created the directory, try to delete the now empty directory and it fails. The directory really and truly is empty when I try to delete it, but it makes no difference. The whole thread aspect is irrelevant I think because at one point everything was in one thread and it didn't work. I'm currently setting a SecurityAttributes structure on CreateDirectory to grant access to everyone, but it makes no difference. RemoveDirectory in the past has returned '32' on GetLastError, which I believe is Sharing violation. But even if I just try to delete the empty directory from the command line, it refuses saying, "The process cannot access the file because it is being used by another process." until I shut down the entire application that created the directory. (Note: the directory is created in GetTempPath.)

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  • Intercepting hyperlinks in an embedded Word document

    - by Ryan
    Hello, I'm working on an app which uses embedded Word documents. We have a feature which allows them to insert a small clickable image into the doc - when the user clicks on it, we want the app to open another window based on some data specified by the user when the image was added. What the application does now is: When the image is inserted, the app creates a hyperlink for it and the data is used as the link destination The user ctrl+clicks on the image and the Word document the WindowSelectionChange event The app handles the WindowSelectionChange event and goes to open the specified window This approach worked fine with previous versions, when we had the 11.0 / Word 2003 interop dll's. We upgraded to 12.0/Word 2007 for the upcoming release, and in many cases the event is not firing when I click on the image - sometimes it does, sometimes it doesn't, and I'm descending into the cargo-cult world trying to figure out why - sometimes saving and re-opening the document works, sometimes killing the Word process and starting a new one fixes (or breaks) the feature. My guess is there's something going wrong with the WinSelChg event, but I'm not sure what. The usual process we have for applying the event handler is: try //remove the old one if any { ((Document)myAXFramerControl.ActiveDocument).Application.WindowSelectionChange -= new ApplicationEvents4_WindowSelectionChangeEventHandler(WSC_eventhandlerfunction); } catch{} ((Document)myAXFramerControl.ActiveDocument).Application.WindowSelectionChange += new ApplicationEvents4_WindowSelectionChangeEventHandler(WSC_eventhandlerfunction); Sometimes one or both of these will throw exceptions - usually a NullReferenceException when removing the handler. Adding the handler sometimes throws the "com object that has been separated from its underlying rcw cannot be used" exception, which I don't understand at all - my impression was that this only occurs when you, say, store a reference to the Word application or document and try to use it later. As it stands the WSC event handler is frequently never run; while I'm happy to fiddle with the app until it works once I can't really expect the same of the users who have been happily using this feature for a while now. Any ideas?

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  • Unix crypt() function in smalltalk/pharo

    - by jdinuncio
    Hello, I want to encode passwords for UNIX accounts using the crypt function. I'm using pharo 1.0. I tried to install the crypto package from squeakmap, but it gaves me an error and the package seem to get partially installed (categories without class). How can I get my password crypted? I'm willing to invoke external code, if it is required (and there's a package in SqueakMap that makes the trick in pharo). Thanks.

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  • Java/XML: Good "Stream-based" Alternative to JAXB?

    - by Jan
    Hello Experts, JAXB makes working with XML so much easier, but I have currently a big problem, that the documents I have to process are too large for an in memory unmarshalling that JAXB does. The data can be up to 4GB per document. The datastructure I will have to process is very simple and flat: With a root element and millions of “elements”… <root> <element> <sub>foo</sub> </element> <element> <sub>foo</sub> </element> </root> May questions are: Does JAXB maybe somehow support unmarshalling in a “streambased” way, that does not require to build the whole objecttree in memory but rather gives me some kind of “Iterator” to the elements, element by element? (Maybe I just missed that somehow…) If not what are your proposals for an good alternative with a a. “flat learningcurve, ideally very similar to JAXB b. AND VERY IMPORTANT: Ideally with the possibility / tool for the generation of the unarshaller code from an XSD file OR annotated Java Class 3.(I have searched SO and those to library that ended up on my “watchlist” (without comparing them closer) were Apache XML Beans and Xstream… What other libraries are maybe even better for the purpose and what are the disadvantages, adavangaes… Thank you very much!!! Jan

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  • Is this a good job description? What title would you give this position?

    - by Zack Peterson
    Department: Information Technology Reports To: Chief Information Officer Purpose: Company's ________________ is specifically engaged in the development of World Wide Web applications and distributed network applications. This person is concerned with all facets of the software development process and specializes in software product management. He or she contributes to projects in an application architect role and also performs individual programming tasks. Essential Duties & Responsibilities: This person is involved in all aspects of the software development process such as: Participation in software product definitions, including requirements analysis and specification Development and refinement of simulations or prototypes to confirm requirements Feasibility and cost-benefit analysis, including the choice of architecture and framework Application and database design Implementation (e.g. installation, configuration, customization, integration, data migration) Authoring of documentation needed by users and partners Testing, including defining/supporting acceptance testing and gathering feedback from pre-release testers Participation in software release and post-release activities, including support for product launch evangelism (e.g. developing demonstrations and/or samples) and subsequent product build/release cycles Maintenance Qualifications: Bachelor's degree in computer science or software engineering Several years of professional programming experience Proficiency in the general technology of the World Wide Web: Hypertext Transfer Protocol (HTTP) Hypertext Markup Language (HTML) JavaScript Cascading Style Sheets (CSS) Proficiency in the following principles, practices, and techniques: Accessibility Interoperability Usability Security (especially prevention of SQL injection and cross-site scripting (XSS) attacks) Object-oriented programming (e.g. encapsulation, inheritance, modularity, polymorphism, etc.) Relational database design (e.g. normalization, orthogonality) Search engine optimization (SEO) Asynchronous JavaScript and XML (AJAX) Proficiency in the following specific technologies utilized by Company: C# or Visual Basic .NET ADO.NET (including ADO.NET Entity Framework) ASP.NET (including ASP.NET MVC Framework) Windows Presentation Foundation (WPF) Language Integrated Query (LINQ) Extensible Application Markup Language (XAML) jQuery Transact-SQL (T-SQL) Microsoft Visual Studio Microsoft Internet Information Services (IIS) Microsoft SQL Server Adobe Photoshop

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  • Facebook Thumbnails Issue Traced to safe_image.php

    - by talkinggoat
    For some reason, facebook's safe_image.php script isn't generating thumbnails, properly. It's generating a 1x1 image... even though the correct image is linked in the script's parameters. Example: <img class="img" alt="" src="https://s-external.ak.fbcdn.net /safe_image.php?d=AQBtrCt_Es_KsED0&w=90&h=90&url=http%3A%2F %2Fwww.southlapatriots.info%2Fimages%2FScamra%2FJayCastilleCouncil2.jpg" The linked image is correct, but it is still only generating a 1x1 image.

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  • Alternative to before </body> tag inline Javascript

    - by Mohammad
    I know inline Javascript is frowned upon and with the new on-the-fly Javascript compressors that check for idle/unused function usage and omit the unused code, it seems good practice to have all your Javascript in an external file. My question is, in situations like FOUC (flash of unstyled content) which usually require little snippets of code right before the closing </body> tag, is there a JQuery resolution that would serve the same purpose, but from a remote Javascript file linked in the <head> of the document?

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  • How do I fork correctly in a perl module for znc?

    - by rarbox
    I'm currently writing an IRC bot. The scripts are loaded as perl modules in ZNC but the bot gets disconnected with an Input/Output error if I create a forked process. This is a working example script without fork, but this causes the bot to freeze until the script finishes doing its task. package imdb; use warnings; use strict; sub new { my ($class) = @_; my $self = {}; bless( $self, $class ); return( $self ); } sub OnChanMsg { my ($self, $nick, $channel,$text) = @_; #unless (my $pid = fork()) { my $result = a_slow_process($text); ZNC::PutIRC( "PRIVMSG $channel :$result" ); # exit; #} return( ZNC::CONTINUE ); } sub OnShutdown { my ( $me ) = @_; } sub a_slow_process { my $input = shift; sleep 10; return "You said $input."; } 1; The fork code that is causing the error is commented out. How do I fix this? Edited to add: I was told that ZNC::PutIRC should not be put in the child process.

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  • Weird javascript problem...

    - by Silvio Iannone
    Hi there, i'm building a page that is dinamically loaded with ajax. This is what the '$.get' jQuery function calls (this is located on an external HTML page): <script type="text/javascript"> $(function() { $('button').sb_animateButton(); $('input').sb_animateInput(); $('#settings_security_error').hide(); }); function check_passwords(password, password_confirm) { $('#settings_security_error').show(); alert('I\'m in funcion!'); // This works... if(password.length < 4) // ... this doesn't { $('#settings_security_error').innerHTML = 'Password too short'; } else { password = hex_md5(password); password_confirm = hex_md5(password_confirm); $.get('/engine/ajax/check_password.php?password=' + password + '$password_confirm=' + password_confirm, {language: "php", version: 5}, function(result) { $('#settings_security_error').innerHTML = result; }, 'html'); } } </script> <div class="title">Security</div> <table class="sub_container"> <tr> <td><label>Old password</label></td> <td class="td_input"><input type="password" name="old_password"/></td> </tr> <tr> <td><label>New password</label></td> <td class="td_input"><input type="password" name="new_password" id="settings_security_new_password" onkeyup="check_passwords(this.value, getElementById('settings_security_password_confirm').value)"/></td> </tr> <tr> <td><label>Confirm password</label></td> <td class="td_input"><input type="password" name="new_password_confirm" id="settings_security_password_confirm" onkeyup="check_passwords(getElementById('settings_security_new_password').value, this.value)"/></td> </tr> <tr> <td class="td_error" id="settings_security_error"></td> </tr> </table> And this is where the external HTML is placed...: <div id="settings_appearance"> </div> ... from this javascript snippet: function get_page_content(page, target_id) { $.get('engine/ajax/get_page_content.php?page=' + page, null, function(result) { $("#"+target_id).html(result); // Or whatever you need to insert the result }, 'html'); } Well... the problem is that the javascript in the first snippet is executed when it's loaded by the $.get function, but i still can't understand the reason why when i type into the input boxes nothing happen. It should write the output of the javascript function check_passwords(password, password_confirm) in <td class="td_error" id="settings_security_error"></td>. Thanks for helping. Silvio

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  • How to change a Window Owner using its handle

    - by Ricky AH
    I want to make a .NET Form as a TopMost Form for another external App (not .NET related, pure Win32) so it stays above that Win32App, but not the rest of the apps running. I Have the handle of the Win32App (provided by the Win32App itself), and I've tried Win32 SetParent() function, via P/Invoke in C#, but then my .NET Form gets confined into the Win32App and that's not what I want.

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  • Wondering where to begin

    - by Cat
    Hello all. After being interested for years and years (and years), I have finally decided to start learning how to create software and web applications. Base on recommendations, I have started with learning the basics of web design first (which I am almost done with) and then will move on to the meat of my process: learning the languages. Problem is, I don't know where to start :/ PHP, Ruby, Perl...and where would SQL, JavaScript and .NET fit into the mix? I am assuming they build on each other/play off of each other somewhat so following some sort of 'order' will make the process more logical and digestible. You're probably thinking, "Just go to school for computer engineering, duh!" But I already have a degree and don't plan on going back to school. I believe I have an adequate aptitude for this sort of thing, and although it will be challenging, with the support of the community I know I can do it on my own. Thank in advance everyone and I am very sorry for the length. I look forward to hearing what all you have to say. Warm Regards, Cat

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  • Disable Code analysis warnings .NET

    - by acidzombie24
    In visual studios i can run code analysis on my .NET project. I am running basic correctness and have 85 warnings. Which is a little much. Also majority of them are in external code. How do i disable specific warnings so i can focus on the more important warnings? I tried the below but it does not recognize code analysis warnings. (I first tried w/o the CA) #pragma warning disable CA1820 CA1065 CA2100

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  • Problem detecting installed application on Win Svr 2003 x64

    - by PD
    I have an x86 Windows application that consists of a couple of services and a client ui. Due to various issues with persuading the various MSIs to upgrade properly, the installation process is now governed by a wizard-style program that detects what is currently installed and handles upgrades by storing the user's current settings, uninstalling the existing software and installing the new version(s). The basic process is: Look in HKLM\Software\Classes\Installer\Products Loop through the GUID keys therein looking for ProductName="(my app name)" If not found, repeat starting from HKCU\Software\Microsoft\Installer\Products instead If found, offer the user an upgrade (as described earlier) else a clean install (i.e. user is asked various questions by the wizard) Now, this works just fine on pretty much any Windows platform you care to mention, from XP up. It fails only on Windows Server 2003 x64, in that an existing installation is not detected by the wizard - despite the exact same registry keys being present as are on any other platform I test on. It's fine on: XP x32 Vista x32, x64 Server 2003 x86 Server 2008 x86, x64 Server 2008 R2 x64 Windows 7 x86, x64 It's only Server 2003 x64 that seems to exhibit this issue.

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  • BackgroundWorker and instance variables

    - by Alastair Pitts
    One thing that's always confused me is how a BackgroundWorker seems to have thread-safe access to the instance variables of the surrounding class. Given a basic class: public class BackgroundProcessor { public List<int> Items { get; private set; } public BackgroundProcessor(IEnumerable<int> items) { Items = new List<int>(items); } public void DoWork() { BackgroundWorker worker = new BackgroundWorker(); worker.RunWorkerCompleted += new RunWorkerCompletedEventHandler(worker_RunWorkerCompleted); worker.DoWork += new DoWorkEventHandler(worker_DoWork); worker.RunWorkerAsync(); } void worker_DoWork(object sender, DoWorkEventArgs e) { var processor = new ProcessingClass(); processor.Process(this.Points); //Accessing the instance variable } void worker_RunWorkerCompleted(object sender, RunWorkerCompletedEventArgs e) { //Stuff goes here } } Am I erroneous in my assumption the the call to processor.Process(this.Points); is a thread-safe call? How don't I get a cross-thread access violation? I'm sure it's obvious, but it always has confused me.

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