teramako https://blog.hatena.ne.jp/teramako/ hogehoge @teramako https://teramako.hatenadiary.org/ JavaScript Mozilla JavaScriptの話 var o = {}; for each (let val in ["a","b","c"]) { o.__defineGetter__(val, function (){ return val; }); } 結果 o.a; // "c" o.b: // "c" o.c; // "c" になってしまう。letで書いているからいけると思ったのに。 var o = {}; for each (let val in ["a","b","c"]) { let value = val; o.__defineGetter__(value, function (){… 190 <iframe src="https://hatenablog-parts.com/embed?url=https%3A%2F%2Fteramako.hatenadiary.org%2Fentry%2F20110511%2Fp1" title="let がブロックを作ってくれない？ - hogehoge @teramako" 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 2011-05-11 00:00:00 rich https://teramako.hatenadiary.org/entry/20110511/p1 1.0 100%