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When should I use nil and NULL in Objective-C?
...an send messages to nil, so you can use it in some places where null cant work.
In general, just use nil.
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Intelligent way of removing items from a List while enumerating in C#
...emoveAll() method:
myList.RemoveAll(x => x.SomeProp == "SomeValue");
Or, if you need certain elements removed:
MyListType[] elems = new[] { elem1, elem2 };
myList.RemoveAll(x => elems.Contains(x));
This assume that your loop is solely intended for removal purposes, of course. If you do n...
How to master AngularJS? [closed]
...nced things are significantly harder (directives, provider / service / factory...)
8 Answers
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How to make Google Chrome JavaScript console persistent?
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If anyone's still looking for this, I'm on Chrome 15.0.874.58 beta-m and I have a checkbox in Developer Tools > Settings labelled "Console: Preserve log on navigation". Does the job nicely.
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Remote branch is not showing up in “git branch -r”
I have been pushing to a remote Bitbucket repository and recently a colleague has pushed a new branch he created to the same repository.
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Is there any way to ignore INSTALL_FAILED_VERSION_DOWNGRADE on application install with the Android
It seems like the most recent Android 4.2 has introduced this error condition on installation when one attempts to install an APK with a lower version. In prior versions of Android, one would be able to install older APK's simply via adb install -r <link to APK> . For debugging purposes, I f...
super() in Java
Is super() used to call the parent constructor?
Please explain super() .
15 Answers
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Why can't I use the 'await' operator within the body of a lock statement?
The await keyword in C# (.NET Async CTP) is not allowed from within a lock statement.
8 Answers
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Ruby on Rails: How do I add placeholder text to a f.text_field?
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The "placeholder" attribute is only supported by HTML5 supporting browsers, leaving out browsers like Internet Explorer.
– travis-146
Aug 8 '11 at 20:52
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Direct casting vs 'as' operator?
...ll.
string s = o as string; // 2
Assigns null to s if o is not a string or if o is null. For this reason, you cannot use it with value types (the operator could never return null in that case). Otherwise, assigns o to s.
string s = o.ToString(); // 3
Causes a NullReferenceException if o is nul...