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Hidden Features of JavaScript? [closed]

What "Hidden Features" of JavaScript do you think every programmer should know? 99 Answers ...
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Histogram using gnuplot?

I know how to create a histogram (just use "with boxes") in gnuplot if my .dat file already has properly binned data. Is there a way to take a list of numbers and have gnuplot provide a histogram based on ranges and bin sizes the user provides? ...
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How to downgrade or install an older version of Cocoapods

How can I downgrade Cocoapods to an older version, or how can I install an older version of Cocoapods? 6 Answers ...
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How to clear the canvas for redrawing

After experimenting with composite operations and drawing images on the canvas I'm now trying to remove images and compositing. How do I do this? ...
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Check if character is number?

I need to check whether justPrices[i].substr(commapos+2,1) . 22 Answers 22 ...
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Why does the indexing start with zero in 'C'?

Why does the indexing in an array start with zero in C and not with 1? 16 Answers 16 ...
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Canvas width and height in HTML5

Is it possible to fix the width and height of an HTML5 canvas element? 4 Answers 4 ...
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What's quicker and better to determine if an array key exists in PHP?

Consider these 2 examples... 10 Answers 10 ...
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getMinutes() 0-9 - How to display two digit numbers?

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How to compute the similarity between two text documents?

I am looking at working on an NLP project, in any programming language (though Python will be my preference). 10 Answers ...