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生成随机数字串的正确姿势 #4

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AymaxLi opened this issue Jul 16, 2018 · 0 comments
Open

生成随机数字串的正确姿势 #4

AymaxLi opened this issue Jul 16, 2018 · 0 comments
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AymaxLi commented Jul 16, 2018

错误姿势

生成长度为 4 的随机数字串

String.prototype.slice.call(Math.random() * 10000, 0, 4)

之前在生成数字串时用过这个方法，后来发现会出现 453. 这样错误数字串，因为 Math.random() 生成了 0.0453xxxxxxxxxx 这样的随机数，这个数字乘以 10000 就变成 453.xxxxxxx，前面的零被吃掉了。。。

正确姿势

所以正确姿势应该是介个样几

String.prototype.slice.call(Math.random(), 2, 6)

计划通 ~
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