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lmarburger/flatten.rb

Forked from avdi/flatten.rb
Created December 16, 2009 02:50
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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]]
# Just as right!
arr.flatten(1) # => [1, 2, 3, 4, [5]]
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