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並前往https://developer.mozilla.org/zh-TW/docs/Web/JavaScript/Reference/Global_Objects/Array/splice

Array.prototype.splice() - JavaScript - MDN Web Docs

... 'sturgeon']; var removed = myFish.splice(2, 0, 'drum'); // myFish 為["angel", "clown", "drum", "mandarin", "sturgeon"] // removed 為[], 沒有元素被刪除

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