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Array.prototype.lengthをアクセッサプロパティで再現するのサンプルコードをリファクタリングした #1626
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個人的には下で
this.items.slice(0, newLength);
とthis.items
を参照してるので、ここではthis.items
のlength
を見るのが正しいかなーとは思いました(get length()と get items()の実装が異なる可能性があるのと、一貫性)
また、
currentItemLength
なのでthis.length
だとItemのlengthだとちょっとわかりにくいというのもあります。あと、setterの中で同じ名前のgetterを参照するのはなんか無限ループ感があってちょっと怖いというが感覚的に避けたい理由ですかね。
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多分一番良いのは、getter/setter内からはgetter/setterを触らないようにするという感じにして、ここでも
this._items
を常に使うとかなのかなーとはちょっと思いました。getter/setterそのものが可読性的には微妙なので(見た目で区別ができない)、改善するとしたら一貫性なのかなーとは思いました。