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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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How to set up Spark on Windows?

I am trying to setup Apache Spark on Windows. 10 Answers 10 ...
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Warning: mysql_connect(): [2002] No such file or directory (trying to connect via unix:///tmp/mysql.

I'm trying to connect to my MySQL DB with the Terminal on my Apple (With PHP). 17 Answers ...
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How do I remove background-image in css?

I have a general rule which gives all DIVs a background image. I have one div (with id='a') which I don't want it to have the background image. What css rule do I have to give it? ...
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is_null($x) vs $x === null in PHP [duplicate]

PHP has two (that I know of, and three if you count isset() ) methods to determine if a value is null: is_null() and === null . I have heard, but not confirmed, that === null is faster, but in a code review someone strongly suggested that I use is_null() instead as it is specifically design...
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Autoreload of modules in IPython [duplicate]

Is there a way to have IPython automatically reload all changed code? Either before each line is executed in the shell or failing that when it is specifically requested to. I'm doing a lot of exploratory programming using IPython and SciPy and it's quite a pain to have to manually reload each module...
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Why, Fatal error: Class 'PHPUnit_Framework_TestCase' not found in …?

Why I'm getting this PHP error? 13 Answers 13 ...
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How to impose maxlength on textArea in HTML using JavaScript

I would like to have some functionality by which if I write 15 Answers 15 ...
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What does auto&& tell us?

If you read code like 4 Answers 4 ...
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How to scale down a range of numbers with a known min and max value

So I am trying to figure out how to take a range of numbers and scale the values down to fit a range. The reason for wanting to do this is that I am trying to draw ellipses in a java swing jpanel. I want the height and width of each ellipse to be in a range of say 1-30. I have methods that find t...