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• How do you check the Gem Version in Ruby at Runtime?

  - by viatropos

  Is it possible to check the gem version of the currently loaded gem in a ruby/rails app? During debugging, I would like to be able to do something like: puts RubyGem.loaded_version(:active_support) Anything like that exist?

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• php pear: how can i check what files did the package install ?

  - by ufk

  Hi. after I installed a package with pear, i would like to know what files this package installed. how can i check that? thanks

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• How can i check if a file exists in Perl?

  - by superstar

  I am a newbie to perl. My problem is... I have a relative path $base_path = input/myMock.TGZ The filename can change. But the path is always stored in $base_path. I need to check if the file exists in $base_path. Any suggestions are helpful to me

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• How to check for and remove a newline (\n) in the first line of a text field in actionscript?

  - by Steven

  In the script, sometimes a newline is added in the beginning of the text field (am using a textArea in adobe flex 3), and later on that newline might need to be removed (after other text has been added). I was wondering how to check if there is a newline at the beginning of the text field and then how to remove it. Thanks in advance.

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• iPhone Encryption Standard - Will this implementation bye-pass apple check?

  - by Futur

  Hi All, I found this implementation, and i am not sure whether we can use this implementation and apple will bye-pass extra check, this is a base-64 implementation. The source code link is http://blog.objectgraph.com/wp-content/uploads/2010/04/CryptTest.zip The web page link is : http://blog.objectgraph.com/index.php/2010/04/20/encrypting-decrypting-base64-encode-decode-in-iphone-objective-c/ Kindly advice me friends.

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• How to check if location services are enabled for a particular app prior to iOS 4.2?

  - by NobleK

  Hello How can I check if the user has allowed location for mu app? Normally I would use authorizationStatus method of the CLLocationManager class, but it is only available in iOS 4.2 and newer. Is it possible to achieve this somehow while still using SDK 4.2, so that the app can still run on devices with older versions of iOS, or do I have to downgrade the SDK? And along the same line, I need a similar alternative for the locationServicesEnabled method prior to iOS 4.0. Thanx

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• can I check if a file exists at a URL?

  - by senzacionale

  http://stackoverflow.com/questions/1979915/can-i-check-if-a-file-exists-at-a-url This link is very good for C#, what about java. I serach but i did not find good solution.

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• How to check whether given file is in PROPER word file format?

  - by shekhar

  Hi, I am developing one application using C# for processing MSWord files. My application gets hang when I pass invalid .doc file as an input. For example, if I have one foo.pdf file and I pass it to my application after changing its extension (foo.doc). Is it possible to check whether file is valid doc file before trying to open it? Please enlighten !!!! Thanks in advance

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• How to get Hudson CI to check out CVS projects over SSH?

  - by bender

  I have my Hudson CI server setup. I have a CVS repo that I can only checkout stuff via ssh. But I see no way to convince Hudson to check out via ssh. I tried all sorts of options when supplying my connection string. Has anyone done this? I gotta think it has been done.

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• SQL Server Compact -- how to check for encrypted SDF file?

  - by Vikram

  Is there a way to check if an SDF file is encrypted before calling SqlCeConnection.Open()? Or do you just try to open it without a password and catch a specific error -- maybe SSCE_M_INVALIDSRCPASSWORD?

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• Check for a valid domain name in a string?

  - by demos

  I am using python and would like a simple api or regex to check for a domain name's validity. By validity I am the syntactical validity and not whether the domain name actually exists on the Internet or not.

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• How to check an input type="file" has a file or not using jquery?

  - by Pandiya Chendur

  I have a file upload control <input id="File1" type="file" /> in my page... How to check an input type="file" has a file or not using jquery on click of a button upload?

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• How can I check for missing references in VB.NET?

  - by Tea With Cookies

  I need to check if all the references in a project exist to avoid possible errors but I can't find anywhere how to do it in VB.NET. I can do it in VBA like this: Dim vbProj As VBProject Dim chkRef As Reference Set vbProj = ThisWorkbook.VBProject For Each chkRef In vbProj.References If chkRef.IsBroken Then Debug.Print chkRef.Name " reference doesn't exist!" End If Next How do I accomplish this in VB.NET?

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• How to check for a dynamically created file in Java?

  - by Moev4

  I have an application where I need to check for a file which may be created dynamically during my execution, I will give up after some MAX time where the file has yet to show up. I wanted to know if there was a more efficient method in Java of checking for the file other than polling for it and then sleeping every X seconds? If not what would be the most efficient manner of doing this?

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• How can I check if a powershell script is signed from the managed API?

  - by James Berry

  I want to execute a powershell using the .net Powershell SDK. I have this working fine. Before I execute it I want to check that the script has been signed by my code signing certificate - this is easy enough to do from within powershell itself using Get-AuthenticodeSignature but I would like to do this in code before choosing to execute this script.

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• Why SVN makes read-only my files after check out or update?

  - by eKek0

  Working with an standard configuration of the server, without any lock, my files are read-only after every check out or update to the working copy. I have to set them to be not read-only to continue working, but besides this shouldn't be happening, it's uncomfortable. Anybody knows how to avoid this behavior?

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• JQuery. Check value of select box and textbox with same class, Is it possible?

  - by Cesar Lopez

  I have several select boxes and textboxes with the same class and I have the following statement. if ($('.selTxtClass:visible').val() == "") { $('.selTxtClass:visible').focus(); } } If I do an alert with ($('.selTxtClass:visible').val()) it comes as undefined. I want to check that the value of these elements are empty, but I cant see what is wrong with this if statement, could you give me a hand, please? Thanks a lot.

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• How to check if an element is really visible with javascript.

  - by Macha

  In javascript, how would you check if an object is actually visible. I don't just mean checking the visibility and display attributes. I mean, checking that the element is not visibility:hidden or display:none underneath another element scrolled off the edge of the screen. EDIT: For technical reasons, I can't include any scripts. I can however use prototype as it is on the page already. EDIT 2: This is no longer neccesary, but I'd still find an answer interesting)

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• Twitter4j: How to check twitter account exists or not after getting the credentials from an User?

  - by Srivigneshwar

  I am creating an application which requires twitter account , after I get credentials from an user , I want to check if that account exists or not. How can I do this with twitter4j ??? Note: I am using Google appengine

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• Are there any tools to handle spell check in the Silverlight RichTextBox?

  - by benrick

  I am looking for any tool or good solution for handling spell check in the RichTextBox for Silverlight 4. Does anyone know of an existing solution or a good way to implement spell checking support for this control?

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• C# 4.0: Is there a way to check if application not exist in System.Diagnostics.Process.Start

  - by xscape

  I want to open any file type by using the code below: System.Diagnostics.Process.Start(pathFile); Is there a way to check if system application not exist? for example: pdf, the local machine has no acrobat reader.

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• How can I check for a file size and add that result in an Excel spreadsheet in Perl?

  - by Nano Taboada

  Currently I monitoring a particular file with a simple shell one-liner: filesize=$(ls -lah somefile | awk '{print $5}') I'm aware that Perl has some nice modules to deal with Excel files so the idea is to, let's say, run that check daily, perhaps with cron, and write the result on a spreadsheet for further statistical use.

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• How to check if MemoryStream can convert to Bitmap in C# ?

  - by Thyphuong

  As the question mentioned, I have a memorystream from a Byte[] ByteArr. How can I check if it can convert to a bitmap before using it with Bitmap myImg = new Bitmap(memorystream).

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• How do you check if a variable is an array in JavaScript ?

  - by Andy McCluggage

  I would like to check whether a variable is either an array or a single value in JavaScript. I have found a possible solution... if (variable.constructor == Array)... Is this the best way this can be done?

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• Adobe Air how to check if URL is online\gives any response exists?

  - by Ole Jak

  I have url I want to check if it is live. I want to get bool value. How to do such thing?

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