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What does 'super' do in Python?

... What's the difference? SomeBaseClass.__init__(self) means to call SomeBaseClass's __init__. while super(Child, self).__init__() means to call a bound __init__ from the parent class that follows Child in the instance's Method Resolution Order (MRO). If the instance is a subclass of ...
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How to use permission_required decorators on django class-based views

...ing how the new CBVs work. My question is this, I need to require login in all the views, and in some of them, specific permissions. In function-based views I do that with @permission_required() and the login_required attribute in the view, but I don't know how to do this on the new views. Is there ...
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How do I raise the same Exception with a custom message in Python?

...ssign a special meaning to the elements of this tuple, while others are usually called only with a single string giving an error message.". So the code won't work arg[0] is not an error message (it could be an int, or it could be a string representing a file name). – Trent ...
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Test for existence of nested JavaScript object key

...bj /*, level1, level2, ... levelN*/) { var args = Array.prototype.slice.call(arguments, 1); for (var i = 0; i < args.length; i++) { if (!obj || !obj.hasOwnProperty(args[i])) { return false; } obj = obj[args[i]]; } return true; } var test = {level1:{level2:{level3:'leve...
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Weak and strong property setter attributes in Objective-C

...g' part (casting from NS to CF) is a little tricky. You still have to manually manage CFRelease() and CFRetain() for CF objects. When you convert them back to NS objects you have to tell the compiler about the retain count so it knows what you have done. Its all here. ...
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How to customize the background/border colors of a grouped table view cell?

...later UITableViewCell now has a backgroundColor property that makes this really easy (especially in combination with the [UIColor colorWithPatternImage:] initializer). But I'll leave the 2.0 version of the answer here for anyone that needs it… It's harder than it really should be. Here's how I ...
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Will using 'var' affect performance?

...ay have chosen an Interface or parent type if you were to set the type manually. Update 8 Years Later I need to update this as my understanding has changed. I now believe it may be possible for var to affect performance in the situation where a method returns an interface, but you would have used a...
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What is the difference between C# and .NET?

.... The C# specification says only a very little about the environment (basically, that it should contain some types such as int, but that's more or less all). share | improve this answer | ...
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Disable button in jQuery

... Here is a small fiddle I created. Please let me what I'm doing wrong. jsfiddle.net/2Nfu4/3 – user2047817 Feb 28 '13 at 17:48 ...
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How to find list intersection?

... looking for a slightly different animal - and you may need to do that manually by sorting each list and merging the results - and keeping dups in the merging. – javadba Jan 6 '19 at 18:51 ...