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[1,2,3].map(parseInt) #2

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w990752800 opened this issue Apr 2, 2020 · 0 comments

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w990752800 commented Apr 2, 2020

1.map 接受三个参数 item ,index ,arr
2.parseInt 接受两个参数，第一个为数值，第二个为基数

基数为 0 的时候默认为 10进制
不在 2 ~ 36 之间，返回 NaN
数值大于基数的时候返回 NaN

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