LIST.map((_,index) => {...})언더스코어...
처음 봤을 땐 귀찮아서 대충 넣은 줄 알았는데
이유가 있었다
Not exactly. () says that the function does not expect any arguments, it doesn't declare any parameters. The function's .length is 0.
If you use _, it explicitly states that the function will be passed one argument, but that you don't care about it.
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