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avdi/flatten.rb

Created December 14, 2009 19:51
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flatten.rb
# Single-level flatten
arr = [ [1], [2,3], [4, [5]] ]
# Too flat!
arr.flatten # => [1, 2, 3, 4, 5]
# Just right!
arr.inject([]){|a,e| a.concat(e)} # => [1, 2, 3, 4, [5]]
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