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jQuery: Check if div with certain class name exists

Using jQuery I'm programmatically generating a bunch of div 's like this: 18 Answers ...
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Get filename and path from URI from mediastore

I have an onActivityResult returning from an mediastore image selection which I can get a URI for an image using the following: ...
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open() in Python does not create a file if it doesn't exist

What is the best way to open a file as read/write if it exists, or if it does not, then create it and open it as read/write? From what I read, file = open('myfile.dat', 'rw') should do this, right? ...
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iOS 6 apps - how to deal with iPhone 5 screen size? [duplicate]

I was just wondering with how should we deal with the iPhone 5 bigger screen size. 8 Answers ...
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Why not be dependently typed?

I have seen several sources echo the opinion that "Haskell is gradually becoming a dependently-typed language". The implication seems to be that with more and more language extensions, Haskell is drifting in that general direction, but isn't there yet. ...
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Center image in div horizontally [duplicate]

I have an img in a div ( class="top_image" ) and I want this image to be exactly in the middle of the div but nothing I try works... ...
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How do I access command line arguments in Python?

I use python to create my project settings setup, but I need help getting the command line arguments. 8 Answers ...
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RadioButton单选按钮扩展集合 · App Inventor 2 中文网

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Using switch statement with a range of value in each case?

In Java, is it possible to write a switch statement where each case contains more than one value? For example (though clearly the following code won't work): ...
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What is a stack trace, and how can I use it to debug my application errors?

Sometimes when I run my application it gives me an error that looks like: 7 Answers 7 ...