Monkeypatches Ruby’s Array Class to add “sum” and “mean” methods.
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Find the mean of an array of integers
** BONUSWTFBBQ **
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Also find the sum of an array of integers
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$ python >>> sum([1, 2, 3]) 6 Hmm... $ irb >> [1, 2, 3].sum => NoMethodError: undefined method `sum' for [1, 2, 3]:Array :-( :-( :-( :-( Hmm... >> require 'rubygems' >> require 'mean' >> [1, 2, 3].sum => 6 :-) :-) :-) :-) $ [1, 2, 3].mean => 2 :-D :-D :-D :-D !!!
sudo gem install mean
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Copyright (c) 2009 Bryan Woods
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Version 2, December 2004
Copyright (C) 2004 Sam Hocevar
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