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## Based on map_by_method 0.7.0 module MapByMethod MAP_BY_METHOD_FORMAT = /^(map|collect|select|each|reject)(?:_by)?_(\w+[?!]?)$/ module InstanceMethods alias_method :respond_to_before_map_by_method?, :respond_to? def respond_to?(method) respond_to_before_map_by_method?(method) or !!method.to_s.match(MAP_BY_METHOD_FORMAT) end protected alias_method :method_missing_before_map_by_method, :method_missing def method_missing(method, *args, &block) if !respond_to_before_map_by_method?(method) and (matches = method.to_s.match(MAP_BY_METHOD_FORMAT)) iterator, callmethod = matches[1..2] # map by multiple stuff result = callmethod.split('_and_').collect do |method| self.send(iterator) { |item| item.send method } end return result.length > 1 ? result.transpose : result.first else method_missing_before_map_by_method(method, *args, &block) end end end def self.included(base) super base.send :include, InstanceMethods end end Array.send :include, MapByMethod

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