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fedesilva/mutable.rb

Created November 26, 2010 16:12
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Mutable arrays suck
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mutable.rb
#I would like to avoid having to explicitly clone the array. I want immutable collections.
ruby-1.8.7-p302 > segment = [ 192,168,20 ]
=> [192, 168, 20]
ruby-1.8.7-p302 > (180..185).map{ |i| segment.clone << i }
=> [[192, 168, 20, 180], [192, 168, 20, 181], [192, 168, 20, 182], [192, 168, 20, 183], [192, 168, 20, 184], [192, 168, 20, 185]]
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