Randomizing an array in Ruby

Paul — Sat, 07 Oct 2006 03:49:34 +0000

Ruby's Array class has no method to randomize the contents of an array. Of course, Array can easily be extended to include this functionality. And like anything else in Ruby, there's more than one way to do it. Here's one way:

class Array

def randomize
arr=self.dup
self.collect { arr.slice!(rand(arr.length)) }
end

def randomize!
self.replace self.randomize
end

def random
self.randomize.first
end

end

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Randomizing an array in Ruby