Sha256: ba60ac09b3c9669423ad3a6b82dfd5489aca05769675e0e8cff29ea0fda92f03
Contents?: true
Size: 334 Bytes
Versions: 7
Compression:
Stored size: 334 Bytes
Contents
class Array
# Like #uniq, but determines uniqueness based on a given block.
#
# a = (-5..5).to_a
# a.uniq_by!{ |i| i*i }
# a #=> [-5, -4, -3, -2, -1, 0]
#
# As can be seen in the example, order is significant.
def uniq_by! #:yield:
h = {}
replace( inject([]){|a,x| h[yield(x)] ||= a << x} )
end
end
Version data entries
7 entries across 6 versions & 1 rubygems