Ryan Zhang

icon location The important thing is learning, and the other important thing is writing.

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第 2 题：['1', '2', '3'].map(parseInt) what & why ?

基数为1（1进制）的时候，返回的结果都是NaN，所以parseInt('2', 1)返回结果是NaN 基数为2（2进制）的时候，字符串的值要求是0和1，所以parseInt('3', 2)返回结果是NaN