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练习题7：取出数组里面的负数 #18

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chenhuiYj opened this issue Jul 3, 2020 · 0 comments
Open

练习题7：取出数组里面的负数 #18

chenhuiYj opened this issue Jul 3, 2020 · 0 comments

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@chenhuiYj
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给出一个数组，数组里面的成员可是数值，字符串，对象，数组。找出里面所有的字符串

let arr=[-6.236,3,-21,{a:-11,b:{c:-10}},[11,2.26,[-1,-6,]]]
console.log(JSON.stringify(str).split('-').splice(1).map(item=>-Number.parseFloat(item)))

解题思路：首先把数组转成 json ，然后按照 ’-‘ 分割字符，把第一个元素删除，再用 Number.parseFloat 把字符串转成 数值

关键点：Number.parseFloat

Number.parseFloat('12asd31{{}') //12
@chenhuiYj chenhuiYj changed the title 练习题7：去除数组里面的负数 练习题7：取出数组里面的负数 Jul 3, 2020
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