# File lib/facets/core/module/equate_on.rb, line 25 def equate_on(*fields) code = "" code << "def ==(o) " << fields.map {|f| "self.#{f} == o.#{f}" }.join(" && ") << " end\n" code << "def eql?(o) " << fields.map {|f| "self.#{f}.eql?(o.#{f})" }.join(" && ") << " end\n" code << "def hash() " << fields.map {|f| "self.#{f}.hash" }.join(" ^ ") << " end\n" class_eval( code ) fields end