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【JavaScript】【jquery】指定した回数だけ回す。$.each([...Array(num).keys()]を使う

Last updated at Posted at 2022-04-27

コード

連番数値の配列を作る


const num = 15;

console.log([...Array(num).keys()]);

// 1から始めたいなら
console.log([...Array(num).keys()].map(n => ++n));

$.each([...Array(fields.length).keys()], function(_,i) {
    console.log(i);
})

結果

[
   0,  1,  2, 3,  4,  5,
   6,  7,  8, 9, 10, 11,
  12, 13, 14
]


[
   1,  2,  3,  4,  5,  6,
   7,  8,  9, 10, 11, 12,
  13, 14, 15
]

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