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

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

pass a function to map. 4. const map1 = array1.map(x => x * 2);. 5. ​. 6. console.log(map1);. 7. // expected output: Array [2, 8, 18, 32].

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