Sha256: b762a534d0cdc6f7a731b51f5e83303e7cc322a8ee6d6dfdfd2df1bd4d047952
Contents?: true
Size: 353 Bytes
Versions: 42
Compression:
Stored size: 353 Bytes
Contents
class Array
# Return an unique array based on the criteria given as a proc.
#
# [1, 2, 3, 4].uniq_by { |i| i.odd? }
# # => [1, 2]
#
def uniq_by
hash, array = {}, []
each { |i| hash[yield(i)] ||= (array << i) }
array
end
# Same as uniq_by, but modifies self.
def uniq_by!
replace(uniq_by{ |i| yield(i) })
end
end
Version data entries
42 entries across 42 versions & 3 rubygems