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並前往https://velog.io/@colki/JS-Object-Array-%EC%9E%90%EC%A3%BC-%EC%82%AC%EC%9A%A9%ED%95%98%EB%8A%94-%EC%88%9C%ED%99%98-Method-%EC%A0%95%EB%A6%AC

[JS] Object, Array 자주 사용하는 순환 Method 정리 - velog

Object.entries Object.keys Object.values hasOwnProperty / for arr.entries() for...of while forEach map / empty요소 순회.

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