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How can I detect if a selector returns null?

...Why did you wrap 'this' inside a $() ? wouldn't 'this' in this context actually point to jQuery object ? – Adham Atta Mar 28 '11 at 11:25 1 ...
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Why are C# interface methods not declared abstract or virtual?

... In the CIL, the method is marked virtual and abstract. (Note that Java allows interface members to be declared public abstract). For the implementing class, there are some options: Non-overridable: In C# the class doesn't declare the method as virtual. That means that it cannot be overridden i...
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How to center canvas in html5

..., let me add a little bit more details. The above properties will horizontally center the canvas, div or whatever other node you have relative to it's parent. There is no need to change the top or bottom margins and paddings. You specify a width and let the browser fill the remaining space with the...
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Import .bak file to a database in SQL server

...e a charm. These are excellent simplified instructions, and they're essentially the same instructions from the official Microsoft link noted in the most voted up answer here. – Leonardo Lopez Jun 4 '15 at 15:50 ...
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Fragments onResume from back stack

...ble to the user) after poping out of the backstack, I'd like some kind of callback to be activated within the fragment (to perform certain changes on a shared UI resource, for instance). ...
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Turning a string into a Uri in Android

...ourse if there are any spaces in the string you pass in your app will barf all over the place if you launch an Intent with this Uri. – Christopher Perry Aug 9 '13 at 22:08 add...
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Check if a value exists in ArrayList

... case because if not a CurrentAccount object may not be the same even when all their attributes have the same value. But I do agree in overriding hashcode() too. – Javi Dec 9 '10 at 23:51 ...
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Swift - Cast Int into enum:Int

... started this week) and I'm migrating my app from Objective-C. I have basically the following code in Objective-C that works fine: ...
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How to put a new line into a wpf TextBlock control?

...t;/data> If that does not work you might need to parse the string manually. If you need direct XAML that's easy by the way: <TextBlock> Lorem <LineBreak/> Ipsum </TextBlock> share |...
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Erratic hole type resolution

... If you want to generate all possible such values, then you can write a function to do so, either with provided or specified bounds. It may very well be possible to use type-level Church Numerals or some such so as to enforce creation of these, but ...