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• iPhone SDK: Check validity of URLs with NSURL not working??

  - by Chris

  hi, I'm trying to check if a given URL is valid and i'm doing it like this: - (BOOL)urlIsValid:(NSString *)address { NSURL *testURL = [NSURL URLWithString:address]; if (testURL == nil) { return NO; } else { return YES; } } Since "URLWithString" is supposed to return "nil" if the URL is malformed I thought this would work but it doesn't for some reason. Could someone please tell me why? Thanks in advance!

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• How to check if object has any properties in JavaScript?

  - by Ricky

  Assuming I declare var ad = {}; How can I check whether this object will contain any user-defined properties?

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• WindowsMobile - How to check if there is WIFI connection ?

  - by Gold

  Hi how I can check if in my Windows mobile program there is WIFI connection ? (I dont want to use try & catch for any action) I work with Windows mobile 2005, FW 3.5, WS2008 thank's in advance

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• How do you check the presence of many keys in a Python dictinary?

  - by Thierry Lam

  I have the following dictionary: sites = { 'stackoverflow': 1, 'superuser': 2, 'meta': 3, 'serverfault': 4, 'mathoverflow': 5 } To check if there are more than one key available in the above dictionary, I will do something like: 'stackoverflow' in sites and 'serverfault' in sites The above is maintainable with only 2 key lookups. Is there a better way to handle checking a large number of keys in a very big dictionary?

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• How to check whether a particular widget is show or not in the sidebar ?

  - by justjoe

  i want to code something in my post template. So, is there any way to check whether a widget that i want to show will be shown in sidebar or not ?

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• vb.net how to check for changes in folder upon application start?

  - by Luay

  while the application is running i'm using FileSystemWatcher to monitor the folder. But what if there are changes to the folder when the application is not running, how can I check for these changes when the application starts. (similar to how windows media player, for example, monitors your music folder. Even when you add songs to that folder when it is not running, it does discover them when it runs next time) Thanks

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• How to check if a couchdb document exists (without retrieving it)?

  - by karlthorwald

  How can I just check if a document exists, mabye get the revision, but not make couchdb send the body of the document? I remember I saw this explained somewhere but I cannot find it.

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• How do I check if an integer is even or odd?

  - by chustar

  How best can I check if an integer is even or odd in C? I considered how I'd do this in Java, but I couldn't come up with an answer either. Thanks.

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• How do I check if an email address is valid without sending anything to it?

  - by Charles

  I have a client with 5000 emails from an old list he has that he wants to promote his services to. He wants to know which emails on the list are still valid. I want to check them for him - without sending out 5K emails randomly and then being listed as a spammer or something. Ideas?

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• How to check if a given Regex is valid? (Java)

  - 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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• How to check if googlebot will index a given url ?

  - by Steffen

  We're doing a whitelabel site, which mustn't be google indexed. Does anyone know a tool to check if the googlebot will index a given url ? I've put <meta name="robots" content="noindex" /> on all pages, so it shouldn't be indexed - however I'd rather be 110% certain by testing it.

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• How to check iPhone keyboard klick sound turned on/off in settings ?

  - by Newbee

  Hi! I'm working on custom keyboard and need to play tap sound for keys if it enabled in the Settings. Tap sound not a problem but how to check is keyboard click sound enabled ? Thanks.

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• Is there a way to check if a var is using setInterval() ?

  - by chadley

  For instance, I am setting an interval like timer = setInterval(fncName, 1000); and if i go and do clearInterval(timer); it does clear the interval but is there a way to check that it cleared the interval? I've tried getting the value of it while it has an interval and when it doesn't but they both just seem to be numbers.

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• Running as Admin, How do I check if some windows account has permissions to read a directory?

  - by Zvika

  I only got the account username (DOMAIN\USER). The check also has to take into account the user's groups. I'd like to use this sample, but I can't figure out how to get a WindowsIdentity only from a username without his password.

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• On linux, how to check if port is in listen state without trying to connect.

  - by Daniel

  Hi, How do I check with C if a port on my local machine (if required by passing an IP or interface, too), is in listen state? I don't want to connect to this port for checking because I don't want to irritate the service behind this port. I want to use this to add the missing net.tcp.listen item to Zabbix.

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• How do I check the Database type in a Rails Migration?

  - by Shaun F

  I have the following migration and I want to be able to check if the current database related to the environment is a mysql database. If it's mysql then I want to execute the SQL that is specific to the database. How do I go about this? class AddUsersFb < ActiveRecord::Migration def self.up add_column :users, :fb_user_id, :integer add_column :users, :email_hash, :string #if mysql #execute("alter table users modify fb_user_id bigint") end def self.down remove_column :users, :fb_user_id remove_column :users, :email_hash end end

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• how to check if a combobox is empty without setfocus?

  - by every_answer_gets_a_point

  i need to know if any text has been entered into a combobox if i do: If comboReason1.Value <> "" Then it gives me an error, and if i do: If comboReason1.Value <> Null then this doesn't work. how do i check whether text has been entered into the combobox?

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• C# How do I catch an exception and check if it contains a string?

  - by lisa

  Hi all, I'm getting an exception which says "Access Denied" when the users permissions are sufficient, how do I catch an exception and check for "Access Denied" so that I can show the user a friendlier "Sorry Access Denied" message? Thanks Beginner :-)

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• jQuery: How do I check checkboxes by id and value (checking some, not all, checkboxes in a list)

  - by Mark Redman

  I need to check a few checkboxes in a list of checkboxes where the IDs are the same but the values are different. I guess this is a specific selector that needs constructing, but how?

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• Is it necessary to check all the field in equals method of model class as i am using JPA ?

  - by Urvish

  Is it necessary to check all the field in equals method of model class as i am using JPA ? please reply....

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• How to check duplicates for 5 textfields with PHP?

  - by jl

  Hi, I have 5 textfields for user input in a form namely: username1, username2, username3, username4 and username5 I would like to know how should I write my php code such that I will be able to check if there is any duplicates between the 5 textfields during POST? I can only think of comparing (username1 !== username2) and so on, but I think there should be simpler way to do it right? How should I be able to do it? Thank you very much.

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• Is there any handy api to check whether the current folder is hide in windows?

  - by sxingfeng

  I need a very fast way to check a list of path, whether they are visiable or not. If the pathA's parent,parent's parent ... is hide, then I think this folder is not visible. Is there any handy API to do it in windows? Many Thank!

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• How do I check whether IIS 6 Management Compatibility feature has been installed?

  - by Joergen Bech

  Using either VB.NET, C#, or VBScript, how can I check if the IIS 6 Management Compatibility feature and its subfeatures have been installed on a machine running IIS 7.x?

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• how to check how many bits in a byte array?

  - by newandfresh

  Im creating a download speed test, and im downloading a 800megabit file to a Byte[] in a memory stream with webClient.DownloadDataAsync(new Uri(link), memStreamArray); How can i check how many bits are in the memStreamArray while downloading? I need this so i can do a calculation on size / time to get the speed in realtime. Im planing on performing this calculation in the webClient.DownloadProgressChanged event.

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• How to check if a file is a textfile?

  - by daniels

  I have a folder full of files and i want to search some string inside them. The issue is that some files may be zip,exe,ogg,etc. Can i check somehow what kind of file is it so i only open and search through txt, php, etc files. I can't rely on the file extension.

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