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• Kill a Perl system call after a timeout

  - by Fergal

  I've got a Perl script I'm using for running a file processing tool which is started using backticks. The problem is that occasionally the tool hangs and It needs to be killed in order for the rest of the files to be processed. Whats the best way best way to apply a timeout after which the parent script will kill the hung process? At the moment I'm using: foreach $file (@FILES) { $runResult = `mytool $file >> $file.log`; } But when mytool hangs after n seconds I'd like to be able to kill it and continue to the next file.

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• Must .aspx files have a page directive?

  - by Keith Bloom

  Around 90% of the pages for our websites have no .Net code embedded in them yet are published as .aspx files. I want these to render as fast as possible so I'm removing as much as I can. Does the .Net page directive have an impact on performance? I am thinking about two factors; the page speed for each GET and what happens when the file changes. The CMS system re-creates each page daily and I'm wondering if this triggers the ASP.Net compilation process.

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• Linux issues on setting a timer function

  - by laura

  I am creating a process with 2 children, 1 of the children is responsible to read questions (line by line from a file), output every question and reading the answer, and the other one is responsable to measure the time elapsed and notify the user at each past 1 minute about the remaining time. My problem is that i couldn't find any useful example of how i can make this set time function to work. Here is what i have tried so far. The problem is that it outputs the same elapsed time every time and never gets out from the loop. #include<time.h> #define T 600000 int main(){ clock_t start, end; double elapsed; start = clock(); end = start + T; while(clock() < end){ elapsed = (double) (end - clock()) / CLOCKS_PER_SEC; printf("you have %f seconds left\n", elapsed); sleep(60); } return 0; }

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• How to free virtual memory ?

  - by Mehdi Amrollahi

  I have a crawler application (with C#) that downloads pages from web . The application take more virtual memory , even i dispose every object and even use GC.Collect() . This , have 10 thread and each thread has a socket that downloads pages . I use dispose method and even use GC.Collect() in my application , but in 3 hour my application take 500 MB on virtual memory (500 MB on private bytes in Process explorer) . Then my system will be hang and i should restart my pc . Is there any way that i use to free vitual memory ? Thanks .

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• How can Perl interact with an ajax form

  - by Jeff

  I'm writing a perl program that was doing a simple get command to retrieve results and process them. But the site has been updated and now has a java component that handles the results (so the actual data is not in the source code anymore). This is the site: http://wro.westchesterclerk.com/legalsearch.aspx Try putting in: Index Number: 11103 Year: 2009 I want to be able to pro grammatically enter the "index number" and "year" at the bottom of the form where it says "search by number" and then retrieve the results listed next to it. I've written many programs in Perl that simply pass variables via the URL and the results are listed in the source code, so it's easy to parse. (Using LWP:Simple) Like: $html = get("http://www.url.com?id=$somenum&year=$someyear") But this is totally new to me and I don't know where to begin. I'm somewhat familiar with LWP:UserAgent and Mechanize. I'd really appreciate any help. Thanks!

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• Active X Development: VC++ or VB or Other technologies

  - by Gopalakrishnan Subramani

  We are in the process of creating active-x controls used within our application. Since Microsoft stopped supporting classic Visual Basic, is it wise to use Visual Basic to develop the Active X control or the latest VC++/ATL/MFC libraries provide more feature where we can create controls faster by leaving Visual Basic flexibility? We will not be able to use .NET/VB.NET/C# since the application is supposed to work inside containers and containers may not support latest .NET runtime. Any other language is best fit for Active X control development other than VB and VC++?

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• Can you decode a mutable Bitmap from an InputStream?

  - by Daniel Lew

  Right now I've got an Android application that: Downloads an image. Does some pre-processing to that image. Displays the image. The dilemma is that I would like this process to use less memory, so that I can afford to download a higher-resolution image. However, when I download the image now, I use BitmapFactory.decodeStream(), which has the unfortunate side effect of returning an immutable Bitmap. As a result, I'm having to create a copy of the Bitmap before I can start operating on it, which means I have to have 2x the size of the Bitmap's memory allocated (at least for a brief period of time; once the copy is complete I can recycle the original). Is there a way to decode an InputStream into a mutable Bitmap?

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• Inserting nil Values into Sqlite Database?

  - by Chris

  I am working on an iPhone App where I am pulling data from an XML file and inserting it into a sqlite database located in the App. I am able to successfully do this process, but it appears that if I try to sqlite3_bind_text with a NSString that has a value of "nil", the App quickly dies. This is an example of code that fails: (modified for this example) // idvar = 1 // valuevar = nil const char *sqlStatement = "insert into mytable (id, value) VALUES(?, ?)"; sqlite3_stmt *compiledStatement = nil; sqlite3_prepare_v2(database, sqlStatement, -1, &compiledStatement, NULL); sqlite3_bind_int(compiledStatement, 1, [idvar intValue]);; sqlite3_bind_text(compiledStatement, 2, [valuevar UTF8String], -1, SQLITE_TRANSIENT);

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• Joomla, drupal or dotnetnuke?

  - by hovercraft2x

  I'm in the process of starting my own podcasting website. I'm trying to find a good cms to use. At work I'm a .net developer and we are starting to use DNN for some small projects around the office. I'd like the new business to be fully open source but it might be nice to use Dnn cause I will already have some experience with it from work. I'm worried that I'll be spreading myself too thin learning php/Lamp at home and .net at work. What does everyone recommend?

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• Problem making ant compile my classes present in different Eclipse projects into single destination

  - by KCore

  I have close to about 20 projects in my Eclipse workspace. They are interdependent. Now I want to build all of them in a single war file. The thing is eclipse does it nicely... if I create a Dynamic Web Project and link sources of all the 20 projects. But I want to automate the entire process and want to be able to run a script (ant maybe..) and deploy a war in my app server. My approach: I started with a simple approach. I tried to sequentially build each project (javac task) with destination directory as web-inf of my war. But it is giving me weird errors like : package " ** " not found,when it shows the same all the required classes in classpath (I used verbose) Do you think, a continous integration engine will be better for my case (20 projects..) I saw Team City, but didnt get it the first time...

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• Best design for generating code from an AST?

  - by Sam Washburn

  I'm working on a pretty complex DSL that I want to compile down into a few high level languages. The whole process has been a learning experience. The compiler is written in java. I was wondering if anyone knew a best practice for the design of the code generator portion. I currently have everything parsed into an abstract syntax tree. I was thinking of using a template system, but I haven't researched that direction too far yet as I would like to hear some wisdom first from stack overflow. Thanks!

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• ASP.NET cached aspx page & IIS logs

  - by Vishal Seth

  Hi guys, Is there any way to find out if ASP.Net runtime has served a cached copy of ASPX page or actually went through the page life cycle? Here is my problem: I'm seeing many entries in my IIS log files that were served successfully (200 OK). I've a corresponding logging code (Log4Net API) in the Session_Start and Application_BeginRequest() events that is logging every request to my DB with more details. I'm not seeing any corresponding entries in my SQL DB for some cases that should have been created by Log4Net code. Are there any logs available to find out if a cached copy was served by .NET worker process? Moreover, if my logging code would throw an exception, won't that show up as 500 in IIS logs? The code is on Windows 2008 Server, IIS 7.

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• scanned image in C#

  - by ahmed fouad

  We wanna a c# solution to correct the scanned image becouse it is rotated and to solve this problem we must detect the rotation angle first then rotate the image.this was our first thinking for our problem then we think image warping will be more accurate as i think it will make the scanned image like our template so we can process it as we know all the coordinates of our template ....... i search for a free SDK or a free solution in c# and helping me in this will be graet work as it is the last task in our working. rally thanxxxx for all.

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• Uploadify uploadSettings with scripData does not work

  - by kubilayeksioglu

  Hi everyone, I am sending a file to my Java Servlet via jQuery Uploadify, there are no problems while sending the actual file. But when I try to send some scriptData with file along, to process on Servlet it just does not send anything. Here is the JS code: $("button").click(function(){ $("#uploadify").uploadifySettings('scriptData', {'length':'0.2'}); $('#uploadify').uploadifyUpload(); }); $('#uploadify').uploadify({ 'uploader': 'assets/uploadify/uploadify.swf', 'script': 'upload', 'folder': '/uploads' }); And here is the Servlet code on the server side: out.println(res.getParameter("length")); Only output I get is null, while expecting "0.2". I just cannot get what's wrong and any kind of help will be appreciated. Thanks in advance.

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• Monolog conversations in SQL Service Broker 2008

  - by hemil

  Hi, I have a scenario in which I need to process(in SQL Server) messages being delivered as .xml files in a folder in real time. I started investigating SQL Service Broker for my queuing needs. Basically, I want the Service Broker to pick up my .xml files and place them in a queue as they arrive in the folder. But, SQL Service Broker does not support "Monolog" conversations, at least not in the current version. It supports only a dialog between an initiator and a target service. I can use MSMQ but then I will have two things to maintain - the .Net Code for file processing in MSMQ and the SQL Server T-SQL stored procs. What options do I have left? Thanks.

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• Missing artifact error in Maven

  - by abhin4v

  I get a missing artifact error during Maven build because one of the dependencies declares it's parent artifact using a property for the version. Now the property itself is declared in the parent pom and my project's build fails giving this error: [ERROR] Failed to execute goal on project abc: Unable to get dependency information for xyz:pqr:jar:SNAPSHOT: Failed to process POM for xyz:pqr:jar:SNAPSHOT: Non-resolvable parent POM xyz:pqr-parent:${someversion} for xyz:pqr:${someversion}: Failed to resolve POM for xyz:pqr-parent:${someversion} due to Missing: ---------- 1) xyz:pqr-parent:pom:${someversion} ---------- 1 required artifact is missing. for artifact: xyz:pqr-parent:pom:${someversion} I have verified that the artifacts are present in correct location in the repository. Is there a way to specify the value of someversion property used in the dependency pom? If not, how should the dependency pom be changed to resolve the error?

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• Identity column SQL Server 2005 inserting same value twice

  - by DannykPowell

  I have a stored procedure that inserts into a table (where there is an identity column that is not the primary key- the PK is inserted initially using the date/time to generate a unique value). We then use SCOPEIDENTITY() to get the value inserted, then there is some logic to generate the primary key field value based on this value, which is then updated back to the table. In some situations the stored procedure is called simultaneously by more than one process, resulting in "Violation of PRIMARY KEY constraint..." errors. This would seem to indicate that the identity column is allowing the same number to be inserted for more than one record. First question- how is this possible? Second question- how to stop it...there's no error handling currently so I'm going to add some try/ catch logic- but would like to understand the problem fully to deal with properly

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• Source control on internet i.e. no private networks.

  - by Kavitesh Singh

  Me and my friend are in the process of starting a small project and want to implement a source control. Now both are located in different cities and can communicate using internet for file sharing etc. I need an online hosting solution or any way where i can maintain the source code repository for both of us to check in/out. As of now we want to maintain it as private project. Does sourceforge allow hosting projects which would not be opensource? One option i was thinking, to obtain a static IP form ISP and host the repository.But that mean my system needs to be online when my friend wants to checkin/out or do some diff with old version code. Secondly, would SVN or git be a better choice in such a situation. I have no experience in git/mercurial as of now.

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• Android app works on emulator but not on phone ("Can't dispatch DDM chunk XXXX: no handler defined")

  - by JR_vv2

  Hey all, I made a very simple application to start playing around with Android development. It works fine on the emulator, but it gives me the following error when I try to install it on my HTC Hero (v1.5): Sorry! The application Simple Dial (process com.foo.simpledial) has stopped unexpectedly. Please try again. (Force Close button) and on in the Eclipse console, I get the following message: [2010-06-14 23:10:52 - Simple Dial] Uploading Simple Dial.apk onto device 'HT9BSHF00222' [2010-06-14 23:10:53 - Simple Dial] Installing Simple Dial.apk... [2010-06-14 23:10:56 - Simple Dial] Success! [2010-06-14 23:10:56 - Simple Dial] Starting activity com.alanvaghti.simpledial.DialActivity on device [2010-06-14 23:10:57 - Simple Dial] ActivityManager: Can't dispatch DDM chunk 46454154: no handler defined [2010-06-14 23:10:57 - Simple Dial] ActivityManager: Can't dispatch DDM chunk 4d505251: no handler defined [2010-06-14 23:10:57 - Simple Dial] ActivityManager: Starting: Intent { action=android.intent.action.MAIN categories={android.intent.category.LAUNCHER} comp={com.alanvaghti.simpledial/com.alanvaghti.simpledial.DialActivity} } I did put 'android:debuggable="true"' inside the application tag on the manifest.xml Any ideas on what is going on?? Thanks in advance.

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• c# finalizer throwing exception?

  - by sjhuk

  Quote from MSDN: If Finalize or an override of Finalize throws an exception, the runtime ignores the exception, terminates that Finalize method, and continues the finalization process. Yet if I have: ~Person() { throw new Exception("meh"); } then it results in a runtime exception? p.s. I know that this should never happen, however I'm just curious around this behaviour. One of our clients had an empty try catch around all of their finalizers.. it didn't even log when things went wrong or reserect the object :/

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• Different Versions of an application in same java application server

  - by Cem

  Hi, We are utilizing citrix netscalar with more than 20 glassfish java application servers. Unfortunately we have to remove previous application before deploying a new version of it since we have same context for these two different application. This error-prone process leads some problems due to lack of attention in builds or other problems. In an urgent case, we simply want to redirect to all traffic to previous application. What is the best practice to run different version of an application in a substantial number of servers in same time? Thanks

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• How to assign permissions for Copy/Paste on windows

  - by jalchr

  Well, as everyone knows there is no way you can assign permissions for Copy/Paste of files on windows platform. I need to control the copy process from a central file server, in a way that helps me know: which user performed the copy Which files were copied where did he pasted them Total size of data copied Time of copy operation If user exceeds the allowed "Copy-Limit", a dialog box requests him to enter administrative credentials or deny him (as it would be configured) Store all this data in a file for later review or send by email. I need to collect this data by putting a utility program on the server itself, without any other installation on client computers. I know about monitoring the Clipboard, but which clipboard would it be? the user's clipboard or the server's clipboard ? And what about drag-drop operation, which doesn't even pass through the clipboard? Any knowledge of whether SystemFileWatcher is useful in such case ? Any ideas ?

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• Looking for actively maintained matrix math library for php

  - by Mnebuerquo

  Does anyone know where I might find a PHP matrix math library which is still actively maintained? I need to be able to do the basic matrix operations like reduce, transpose (including non-square matrices), invert, determinant, etc. This question was asked in the past, then closed with no answers. Now I need an answer to the same question. See these links to related questions: http://stackoverflow.com/questions/428473/matrix-artihmetic-in-php http://stackoverflow.com/questions/435074/matrix-arithmetic-in-php-again I was in the process of installing the pear Math_Matrix library when I saw these and realized it wouldn't help me. (Thanks Ben for putting that comment about transpose in your question.) I can code this stuff myself, but I would make me happier to see that there is a library for this somewhere.

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• Error during maven build: "[java] Timestamp response not valid"

  - by fei

  My maven build started failing randomly, and it got the following error which I cannot make sense of, and googling it doesn't give me anything useful: [echo] Creating a full package... [java] Timestamp response not valid [INFO] ------------------------------------------------------------------------ [ERROR] BUILD ERROR [INFO] ------------------------------------------------------------------------ [INFO] Failed to execute: Executing Ant script: /airtest.build.xml [package-admin-air]: Failed to execute. Java returned: 10 This is a random error that pops up in various point during the build process, and sometimes the build will succeed and then the next one will fail again. This is really weird, does anyone seen this before? I'm using maven 2.2.1 BTW, the error return code 10 in windows mean "Environment is invalid.:

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• building mono from svn - android target

  - by Jeremy Bell

  There were patches made to mono on trunk svn to support android. My understanding is that essentially instead of Koush's system which builds mono using the android NDK build system directly, these patches add support for the android NDK using the regular mono configure.sh process. I'd like to play around with this patch, but not being an expert in the mono build system, I have no idea how to tell it to target the android NDK, or even where to look. I've been able to build mono from SVN using the default target (linux) on Ubuntu, but no documentation on how to target android was given with the patches. Since anyone not submitting or reviewing a patch is generally ignored on the mono mailing list, I figured I'd post the question here.

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