Created
August 12, 2022 15:49
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JS) Init array
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/* Source: https://velog.io/@kler/%EC%9E%90%EB%B0%94%EC%8A%A4%ED%81%AC%EB%A6%BD%ED%8A%B8-%EB%B0%B0%EC%97%B4-%EC%83%9D%EC%84%B1-%EC%B4%88%EA%B8%B0%ED%99%94-%ED%95%9C%EB%B2%88%EC%97%90-%ED%95%98%EA%B8%B0 */ | |
/* console.log()로 v의 값을 확인해보면 undefined가 출력된다. */ | |
const arr = Array.from({length: 5}, (v, i) => { | |
console.log(v, i) | |
return i; | |
}); | |
// => undefined 0 | |
// => undefined 1 | |
// => undefined 2 | |
// => undefined 3 | |
// => undefined 4 |
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