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Prevent double submission of forms in jQuery

I have a form that takes a little while for the server to process. I need to ensure that the user waits and does not attempt to resubmit the form by clicking the button again. I tried using the following jQuery code: ...
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Why can't I call read() twice on an open file?

For an exercise I'm doing, I'm trying to read the contents of a given file twice using the read() method. Strangely, when I call it the second time, it doesn't seem to return the file content as a string? ...
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Quicksort: Choosing the pivot

When implementing Quicksort, one of the things you have to do is to choose a pivot. But when I look at pseudocode like the one below, it is not clear how I should choose the pivot. First element of list? Something else? ...
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Call removeView() on the child's parent first

First a little background: 11 Answers 11 ...
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Using comparison operators in Scala's pattern matching system

Is it possible to match on a comparison using the pattern matching system in Scala? For example: 4 Answers ...
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Merge up to a specific commit

I created a new branch named newbranch from the master branch in git. Now I have done some work and want to merge newbranch to master ; however, I have made some extra changes to newbranch and I want to merge newbranch up to the fourth-from-the-last commit to master . ...
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What is the difference among col-lg-*, col-md-* and col-sm-* in Bootstrap?

What is the difference among col-lg-* , col-md-* and col-sm-* in Twitter Bootstrap? 11 Answers ...
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Get nth character of a string in Swift programming language

How can I get the nth character of a string? I tried bracket( [] ) accessor with no luck. 45 Answers ...
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Prevent browser from loading a drag-and-dropped file

I'm adding an html5 drag and drop uploader to my page. 10 Answers 10 ...
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Define make variable at rule execution time

In my GNUmakefile, I would like to have a rule that uses a temporary directory. For example: 4 Answers ...