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ES6で指定範囲の整数配列を作る

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Pythonのrange関数っぽく、指定した範囲の整数の配列を作る方法。

> Array.from(Array(10).keys())

[ 0, 1, 2, 3, 4, 5, 6, 7, 8, 9 ]

1から10にしたければ、

> Array.from(Array(10).keys(), x => x + 1)

[ 1, 2, 3, 4, 5, 6, 7, 8, 9, 10 ]

0始まりの配列ならこういう書き方もある。

> [...Array(10).keys()]

[ 0, 1, 2, 3, 4, 5, 6, 7, 8, 9 ]
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