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How do I check if a variable exists?

...ed May 9 '09 at 13:16 Ayman HouriehAyman Hourieh 107k1717 gold badges135135 silver badges113113 bronze badges ...
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check if jquery has been loaded, then load it if false

... answered Dec 1 '09 at 19:20 Daniel LeCheminantDaniel LeCheminant 47.3k1515 gold badges115115 silver badges113113 bronze badges ...
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AngularJS : Factory and Service? [duplicate]

...ion and an object Factory Provider Gives us the function's return value ie. You just create an object, add properties to it, then return that same object.When you pass this service into your controller, those properties on the object will now be available in that controller through your factory. ...
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How can I get the source code of a Python function?

...args a = arg1 + arg2 return a But I believe that if the function is compiled from a string, stream or imported from a compiled file, then you cannot retrieve its source code. share ...
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Rendering HTML inside textarea

...s text. Is there an easy way of doing it without relying on external libraries/plugins (I'm using jQuery)? If not, do you know of any jQuery plugin I could use to do this? ...
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What's the best way to cancel event propagation between nested ng-click calls?

... answered Mar 4 '13 at 2:30 StewieStewie 59.5k1919 gold badges142142 silver badges113113 bronze badges ...
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Using 'starts with' selector on individual class names

... I agree. The catch is that we're still heavily supporting IE6 and it doesn't support compound selectors in CSS: .class1.class2.class3 as such, we're relying on using longer class names where 'parameters' are divided by dashes. – DA. Feb 1 '10 a...
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How can I measure the similarity between two images? [closed]

...mage images with a text added vs. another without mirrored images The easiest and simplest algorithm I've seen for this is just to do the following steps to each image: scale to something small, like 64x64 or 32x32, disregard aspect ratio, use a combining scaling algorithm instead of nearest pix...
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jQuery.click() vs onClick

...N) addEventListener is the way to register an event listener as specified in W3C DOM. Its benefits are as follows: It allows adding more than a single handler for an event. This is particularly useful for DHTML libraries or Mozilla extensions that need to work well even if other lib...
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The conversion of a datetime2 data type to a datetime data type resulted in an out-of-range value

...h data in the form (headline, story, and image). ApplyPropertyChanges applies changes to all properties of the object, including your uninitialized DateTime, which is set to 0001-01-01, which is outside of the range of SQL Server's DATETIME. Rather than using ApplyPropertyChanges, I'd suggest retr...