amachang https://blog.hatena.ne.jp/amachang/ IT戦記 https://amachang.hatenablog.com/ JavaScript 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… 190 <iframe src="https://hatenablog-parts.com/embed?url=https%3A%2F%2Famachang.hatenablog.com%2Fentry%2F20080212%2F1202805356" title=" すべてのオブジェクトをキーにできるハッシュの様なもの - IT戦記" class="embed-card embed-blogcard" scrolling="no" frameborder="0" style="display: block; width: 100%; height: 190px; max-width: 500px; margin: 10px 0px;"></iframe> Hatena Blog https://hatena.blog 2008-02-12 17:35:56 rich https://amachang.hatenablog.com/entry/20080212/1202805356 1.0 100%