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Contents
module Enumerable
unless method_defined?(:each_with_object)
# A variation of #inject that saves one from having to
# return the aggregate/memo argument.
#
# Say we want to count characters in a string. Using
# the #each_with_object method we have:
#
# "string".each_with_object(Hash.new(0)) do |c, h|
# h[c] += 1
# end
#
# versus using #inject which would be:
#
# "string".inject(Hash.new(0)) do |h, c|
# h[c] +=1
# h
# end
#
# Notice that the order of the block parameters is reversed.
#
# This method used be called #injecting and had the same
# parameter order as #inject, but Ruby 1.9 has adopted this
# method, so we support it instead.
def each_with_object(memo) #:yield:
each do |element|
yield(element, memo)
end
memo
end
end
end
Version data entries
7 entries across 6 versions & 1 rubygems