# File lib/map.rb, line 1053 def Map.pairs_for(enumerable, *args, &block) if block.nil? pairs, block = [], lambda{|*pair| pairs.push(pair)} else pairs = false end result = case enumerable when Hash enumerable.each_pair(*args, &block) when Array enumerable.each_with_index(*args) do |val, key| block.call(key, val) end else enumerable.each_pair(*args, &block) end pairs ? pairs : result end