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• Turn off error messages in a bash script

  - by Werner

  Hi, how can one turn off the error messages of a bash script? I want to turn it off, and handle the expected ones by myself For instance, when it does not find some files, to show my specific error message. Thanks

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• How can I find out at runtime what garbage collection algorithm is configured in my JVM?

  - by kweiner

  I have an instance of Tomcat 6.0.18 running on Sun's Java HotSpot(TM) Server VM build 1.6.0_14-b08. Is there any way for me to find out what garbage collection algorithm the JVM is using to run my web application?

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• Rails - Accessing model class methods from within ActiveRecord model

  - by aaronrussell

  I have a simple standalone model that doesn't inherit from ActiveRecord or anything else, called SmsSender. As the name suggests, it delivers text messages to an SMS gateway. I also have an ActiveRecord model called SmsMessage which has an instance method called deliver: def deliver SmsSender.deliver_message(self) self.update_attributes :status => "Sent" end The above is returning uninitialized constant SmsSender. I'm sure this is dead simple, but how can I access the SmsSender class from within my model?

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• Change model name in rails easily

  - by Kenji Crosland

  I'm going to need to change one of my model names. Is there anything out there that will replace every instance of the original model name in the controllers views and tests or do I have to do it all manually, page by page?

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• Obtain the stored values of a modified Rails model object

  - by J. Pablo Fernández

  Is there a way to obtain the stored value, that is, the one in the database once the instance has been modified? The problem I'm trying to solve is get the stored slug of an object that failed to save to be able to regenerate the URL.

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• Qt: How can I receive events fired by QWebElement objects?

  - by Jen

  I want to receive notifications whenever links are clicked or text fields are changed in a Webkit instance in Qt. How can I hook up event listeners to a QWebElement? I know I can put some Javascript on each element’s onchange / onclick handler, but I’m looking for a cleaner solution.

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• JSON parsing using JSON.net

  - by vbNewbie

  I am accessing the facebook api and using the json.net library (newtonsoft.json.net) I declare a Jobject to parse the content and look for the specific elements and get their values. Everything works fine for the first few but then I get this unexplained nullexception error " (Object reference not set to an instance of an object) Now I took a look at the declaration but cannot see how to change it. Any help appreciated: Dim jobj as JObject = JObject.Parse(responseData) Dim message as string = string.empty message = jobj("message").tostring The error occurs at the last line above.

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• Doubt in Vptr -want to know how it is getting Vtable address

  - by gobi

  Hi all, i wanted to know how vptr getting vtable base address. for instance class A { virtual getdata(); int a; } now, A obj; /// here vptr getting vtable's base address. i wanted to know this mystery.. Thanks in advance

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• `return value' from Constructor Exception in Java?

  - by Lajos Nagy

  Take a look that the following code snippet: A a = null try { a = new A(); } finally { a.foo(); // What happens at this point? } Suppose A's constructor throws a runtime exception. At the marked line, am I always guaranteed to get a NullPointerException, or foo() will get invoked on a half constructed instance?

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• Security concerns when bridging programming languages.

  - by The Rook

  What security concerns are there when you create a hybrid of languages? For instance using python and java code together with jython, or creating a python module from a C++ library. There are other ways of mixing 2 or more languages. Do you know of an example where this creates a vulnerability?

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• How to import a svn repository underneath a git repository?

  - by Thiago Moreira

  Hi there, I have a svn repository that I migrated to git using the tool svn2git. Now I would like to push this git layout to a remote repository underneath an existing directory. But, I would like to keep the svn history (tags and branches). For instance: Git remote repository layout: git-repository/dirA git-repository/dirB git-repository/dirC/svn-repository-migrated-to-git Makes sense? Is it possible?? Thanks

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• GNU GPL - access to data?

  - by Ke

  Hi, I realise that modified versions of the software should be freely available, but what about the content that is held within a mysql database for instance? does that have to be available too? Cheers ke

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• Desiging a AJAX website

  - by Narmatha Balasundaram

  What are the things to consider and watch out for when designing a website with AJAX? Must take care of conditions, say timeouts, error handling, for instance? Best practices? What parameters to take care of while designing and coding?

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• How to configure multiple web site with django and tornado?

  - by mapcuk

  On my VDS I use nginx, django and tornado. I had just one project, Now i gonna deploy another one project with a different domain name. I want to use different databases and folders. I know how to configure nginx for serving static resourses , but what about tornado? Should i run separeted instance of tornado for each project or is there any better solution?

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• Transcoding audio and video

  - by Lance Fisher

  What is the best way to transcode audio and video to show on the web? I need to do it programmatically. I'd like to do something like YouTube or Google Video where users can upload whatever format they want, and I encode it to flv, mp3, and/or mp4. I could do it on our server, but I would rather use an EC2 instance or even a web service. We have a Windows 2008 server.

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• In Javascript is there a function that returns the number of times that a given string occurs?

  - by William Calleja

  In Javascript is there a function that returns the number of times that a given string occurs? I need to return a numeric value that is equal to the number of times that a given string occurs within a particular string for instance: var myString = "This is a test text" If I had to search for 'te' in the above string it would return 2.

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• Passing values from UIButton to an UIActionSheet

  - by Michael

  I'm trying to send an ActionSheet a variable from a button. I can't use the tag property because its being used for something else. I've declared myIndexRow as an instance variable and have: NSInteger myIndexRow = indexPath.row; [deleteButton addTarget:self action:@selector(showDeleteSheet:) forControlEvents:UIControlEventTouchUpInside]; deleteButton.myIndexRow = myIndexRow; but I'm getting the 'Request for member 'myRow' is something not a structure or union' There is something obvious I am missing here.

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• Redirect everything to index.php

  - by pixel

  I'm trying to do clean urls by exploding $_SERVER['REQUEST_URI'] and then switching between the results. However, once a user goes outside index.php, I'm assuming I need to redirect them back to index.php in order to process the URL they want to reach. How can I accomplish this? So for instance, user goes to www.domain.com/home/johndoe/... i'd like the index.php (domain.com/index.php) to be hit so that it can process the /home/johndoe/ via request_uri.

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• In-line CSS IE hack

  - by Daimonan

  Is it possible to create, for instance, a box model hack while using in-line CSS? For example: <div id="blah" style="padding: 5px; margin: 5px; width: 30px; /*IE5-6 Equivalent here*/"> Thanks!

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• Are there any well-known/famous programmers on SO? [closed]

  - by John

  For instance authors, creators of widely used software or famous startups, etc? Closest I;ve seen is Jeff Atwood but I don't know if that counts... what about Torvalds, Carmack, et al? EDIT: Made CW

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• MVC, can model save/load its data?

  - by fuzzygoat

  Quick question, my data model is a singleton object and it contains a list of names I want archive. My idea is to make the model responsible for loading / saving this data. The ModelLoad will then be called by the ViewControllerviewDidLoad and the ModelSave by ViewControllerapplicationWillTerminate. I could do the load / save directly within the ViewController, but this would be messy as the list of names are on instance variable of the model. gary

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• Does anyone have any good examples of a .NET program that stays memory resident and runs an action o

  - by stormist

  This program should not have a visible window, more like a daemon. (a taskbar program for instance) Any links or advice will be appreciated.

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• How to control "Microsoft Speech Recognition" program using c#?

  - by aF

  Hello, I want to know if it's possivble to control "Microsoft Speech Recognition" using c#. Is it possible, for instance, to simulate the click on "On: Listen to everything I say" programmatically using c#?

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• sequence diagram [UML]

  - by Upul

  Hi All, I have a question regarding sequence diagrams. When drawing sequence diagrams, Is it enough to draw one diagram per user case ? or do we need to draw a set of sequence diagrams to cover each user case instance ? (is a sequence of actions a system performs that yields an observable result of value to a particular Use Case Actor)

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• Can't use method return value in write context--how to fix for include_once?

  - by Bill Paetzke

  I'm getting this error in CodeIgniter when trying to load the email library: Can't use method return value in write context It's happening on line 827 of Loader.php in [codeigniter root]/system/libraries/Loader.php include_once($filepath); where $filepath equals "/var/www/system/libraries/Email.php" I called it like this in another php file: $this->load->library('email'); where $this is the CodeIgniter instance. According to the CodeIgniter email doc page, I'm doing it right. But it's not working...

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