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Swap elements of an array in Ruby

class Array
    def swap!(a,b)
         self[a], self[b] = self[b], self[a]
    self
    end
end


You can now do stuff like..

[1,2,3,4].swap!(2,3)  # = [1,2,4,3] etc..


Many thanks to Sam Stephenson and technoweenie for their suggestions.
to ruby array arrays swap swapping by peter on May 13, 2005 1 Comments
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