method

uniq_by

v3.0.9 - Show latest stable - 0 notes - Class: Array

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What's this?

uniq_by() public

Return an unique array based on the criteria given as a proc.

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

Show source

# File activesupport/lib/active_support/core_ext/array/uniq_by.rb, line 7
  def uniq_by
    hash, array = {}, []
    each { |i| hash[yield(i)] ||= (array << i) }
    array
  end

uniq_by

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