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@ML081(081 ML)

JSでループ/連番配列作成の書き方

Posted at

はじめに

JavaScript でとりあえずループさせたい、とりあえず連番の配列を作成したいという備忘録です。

forEach

[...Array(4)].forEach((_, i) => { console.log(i); });

log
image.png

連番配列作成

[...Array(4).keys()]

log
image.png

[...Array(4)]

とすると、配列の中身がundefinedになるので注意！

log
image.png

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