Class: Array

Inherits:
Object
  • Object
show all
Defined in:
lib/rails2ext/active_support/core_ext/array/uniq_by.rb

Instance Method Summary collapse

Instance Method Details

#uniq_by ⇒ Object

Returns an unique array based on the criteria given as a Proc.

[1, 2, 3, 4].uniq_by { |i| i.odd? } # => [1, 2]



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# File 'lib/rails2ext/active_support/core_ext/array/uniq_by.rb', line 6

def uniq_by
  hash, array = {}, []
  each { |i| hash[yield(i)] ||= (array << i) }
  array
end