どうやったら効率的なものを書けるだろうか Dictionary = function() { var self = function(k, v) { var state = self.state; if (v === undefined) { return state(k); } else { self.state = state(k) === v ? state : function(a) { return a === k ? v : state(a) } return v; } }; self.state = function(k) { return undefined }; return self; }; var dict = new Dictionary; dict(1, 2) dict('1', 3) var f = function() { hoge }; var g = fu