Module: Enumerable

Included in:
ConfigTable
Defined in:
lib/roebe/core/enumerable.rb

Overview

#

Instance Method Summary collapse

Instance Method Details

#uniq_by ⇒ Object

#

uniq_bq

Like #uniq, but determines uniqueness based on a given block.

(-5..5).to_a.uniq_by {|i| i*i }

produces

[-5, -4, -3, -2, -1, 0]

Usage example:

array = [ ['foo','bar'], ['fii','bur'], ['foo','bas'] ]; array.uniq_by {|e| e[0] }
#


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# File 'lib/roebe/core/enumerable.rb', line 20

def uniq_by
  h = {}
  inject([]) {|a,x| h[yield(x)] ||= a << x}
end