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How do I create an average from a Ruby array?
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Try this:
arr = [5, 6, 7, 8]
arr.inject{ |sum, el| sum + el }.to_f / arr.size
=> 6.5
Note the .to_f, which you'll want for avoiding any problems from integer division. You can also do:
arr = [5, 6, 7, 8]
arr.inject(0.0) { |sum, el| sum + el } / ...
WPF Application that only has a tray icon
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http://visualstudiogallery.msdn.microsoft.com/aacbc77c-4ef6-456f-80b7-1f157c2909f7/
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edited Aug 8 '13 at 9:17
XLII
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How to get an element by its href in jquery?
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Search for “does-not-contain” on a DataFrame in pandas
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278
You can use the invert (~) operator (which acts like a not for boolean data):
new_df = df[~df["...
How can I reference the value of a final static field in the class?
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Running the new Intel emulator for Android
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answered May 27 '12 at 6:44
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