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Format decimal for percentage values?

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Referring to a file relative to executing script

In a bash script I'm writing, I use source to include the variable defined in a configuration file. The script to be executed is act.sh , while the script to be source d is act.conf.sh , so in act.sh I have: ...
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What's the UIScrollView contentInset property for?

Can someone explain to me what the contentInset property in a UIScrollView instance is used for? And maybe provide an example? ...
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Find the extension of a filename in Ruby

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Random row selection in Pandas dataframe

Is there a way to select random rows from a DataFrame in Pandas. 6 Answers 6 ...
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binning data in python with scipy/numpy

is there a more efficient way to take an average of an array in prespecified bins? for example, i have an array of numbers and an array corresponding to bin start and end positions in that array, and I want to just take the mean in those bins? I have code that does it below but i am wondering how it...
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R - Concatenate two dataframes?

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Sass calculate percent minus px

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How to reuse an ostringstream?

I'd like to clear out and reuse an ostringstream (and the underlying buffer) so that my app doesn't have to do as many allocations. How do I reset the object to its initial state? ...
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What are Vertex Array Objects?

...just starting to learn OpenGL today from this tutorial: http://openglbook.com/the-book/ I got to chapter 2, where I draw a triangle, and I understand everything except VAOs (is this acronym OK?). The tutorial has this code: ...