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• How to check if a given Regex is valid?

  - by Philipp Andre

  Hi folks, I have a little program allowing users to type-in some regular expressions. afterwards i like to check if this input is a valid regex or not. I'm wondering if there is a build-in method in Java, but could not find such jet. Can you give me some advice? Best regards Phil

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• Perl - Check if contents of one file exist in another and print to output file explaination in descr

  - by golwalkar.rohan

  Requirement:- File1 has contents like - ABCD00000001,\some\some1\ABCD00000001,Y,,5 (this indicates there are 5 file in total in unit) File2 has contents as ABCD00000001 So what i need to do is check if ABCD00000001 from File2 exist in File1 - if yes{ print the output to Output.txt till it finds another ',Y,,X'} else{ No keep checking} Anyone? Any help is greatly appreciated.

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• Check if a Windows application is installed on local machine from Asp.net?

  - by Jim

  We have a certain application installed on a single machine. I would like to enable/disable a button based on the existence of this application. Is there a way to check for its existence from asp.net? the app is currently on an XP machine, but want to code for Win7 as well. VS2008 3.51. Asp.net

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• MFC : How to check if a character input is unicode?

  - by Owen

  Hi All, I have an input text field which accepts a certain maximum number of characters. This number of characters should change though if the character inputs are unicode. Question: Is there a way I could check if the character input is unicode or not?

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• how to check if the OS is Windows or Debian in c++?

  - by tsubasa

  I want to clear console screen every time the user make an input in C++. I'm thinking of using system command. For Windows, it is "cls". For Linux, it is "clear". Is there a way check which system to use the appropriate command in c++? Thanks.

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• PHP: Shortest way to check if a textbox contains positive integer (not float)?

  - by NAVEED

  I want to check if user input a positive integer number. 1 = true +10 = true .1 = false -1 = false 10.5 = false Just a positive number. No characters. No special character. No dot. No minus sign. I tried is_int() function but it is returning false even on positive integers. Is there a string to int problem? Thanks

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• How to check for custom url scheme on iphone?

  - by rdesign

  Hey guys, I want to use custom url schemes in my app, for example calling navigons mobile navigator. First of all I want to check whether navigon is installed or at least whether the custom url scheme "navigon://" has already been registered. Any Ideas? Thanks a lot.

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• Java Regular Expression. Check if String contains ONLY Letters

  - by user69514

  How do I check if a String contains only letters in java? I want to write an if statement that will return false if there is a white space, a number, a symbol or anything else other than a-z A-Z. My string must contain ONLY letters. I thought I could do it this way, but I'm doing it wrong: if( ereg("[a-zA-Z]+", $myString)) return true; else return false;

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• How can I check out the picture quality in program using c#?

  - by C. Karunarathne

  I want to check out whether the photograph is suitable for print or not using my application.How can I do that?I don't know much about photo quality?Is the resolution of every photograph is same or not?

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• How to check if a CRAN mirror is outdated?

  - by ggg

  R users are advised to download R and R packages from local repositories. But some are outdated. Is there an easy way to check if a repository is outdated? Any function in R that does that?

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• How to implement a password change check in Powershell?

  - by laurenbo

  I've created a set of virtual machines (Windows Server) with a specific admin password; these VMs have been assigned to users, and may be in use. I want to know if the user changed the admin password, and do the check so the user doesn't notice. What are good solutions in powershell?

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• How do I check if a given datetime object is "between" two datetimes?

  - by alex

  my_event = Event.objects.get(id=4) current_time = datetime.datetime.now() How do I do check if my current time is between them? my_event.start_time < current_time < my_event.end_time

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• How should I write this string-prefix check so that it's idiomatic Python?

  - by Kevin Stargel

  I have a couple of lists of items: specials = ['apple', 'banana', 'cherry', ...] smoothies = ['banana-apple', 'mocha mango', ...] I want to make a new list, special_smoothies, consisting of elements in smoothies that start with the elements in specials. However, if specials is blank, special_smoothies should be identical to smoothies. What's the most Pythonic way to do this? Is there a way to do this without a separate conditional check on whether specials is blank?

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• Where is the most appropriate location to check "Querystring is needed, else redirect"?

  - by Mike

  Hi, I have an ASP.NET application. On some pages it requires a specific querystring to be called with the page, so data can be processed. Where is the most appropriate place to check whether the required querystring is included in the URL, otherwise redirect to somewhere else? I have only used one masterpage. Thoughts and suggestions would be appreciated. Thanks.

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• Is there a way to check if a sprite has been added or not in Cocos2d?

  - by thyrgle

  Hi so if have a sprite and do [self addChild:sprite] is there way to check if the sprite has been addChilded (lack of a more accurate word to describe it)?

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• How do I check the date and time of the latest `git pull` that was executed?

  - by Chirag Patel

  How do I check the date and time of the latest git pull that was executed? I frequently need to know when the code changed on a server when something goes wrong. Thanks! Chirag

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• How do i check if the game was closed?

  - by Dori

  I am trying to create a game and now i want to check if the game is being closed so i will send a message to the server, how do i do it? (XNA)

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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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• Change / Check permissions (Read, Write,...) for the NETWORK SERVICE account with C#

  - by Kottan

  How can I change / check the permissions (Read, Write,...) for the NETWORK SERVICE account with C# porgrammatically ?

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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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• 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 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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• 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 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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