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fdelacruz/gist:e03fec47ca271c44baf6

Created August 7, 2014 00:48
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gistfile1.rb
cube = Proc.new { |x| x ** 3 }
[1, 2, 3].collect!(&cube) #=>[ 1, 8, 27]
[4, 5, 6].map!(&cube) #=>[64, 125, 216]
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