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momo-lab/array_insertif.js

Created July 31, 2024 01:29
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array_insertif.js
// 指定した条件の位置に値を追加する。合致しない場合は末尾に追加する。
Array.prototype.insertIf = function(value, condition) {
const index = this.findIndex(condition);
if (index < 0) {
this.push(value);
} else {
this.splice(index, 0, value);
}
return this;
}
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