JS 迴圈與效能

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const listSize = yourList.length; // 精華
for (let index = 0; index < listSize; index++) {
  // ...
}

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for (let index = 0; index < yourList.length; index++) {
  // ...
}

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yourList.forEach((element) => {
  // ...
});

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for (const element of yourList) {
  // ...
}