JS:数组的 Math.random

2022-01-19 00:00:00 string return arrays call javascript

本周学习 JS.

是否可以使用 Math.random 在数组中返回随机值?该值是否是一个字符串并且仍然有效?

Is it possible to use Math.random to return a random value in an array? Does that value be a string and still work?

推荐答案

可以取浮点数(0 到 1 之间，不包含)并将其转换为数组的索引(0 到长度的整数)数组 - 1).例如:

You can take the floating point number (between 0 and 1, non-inclusive) and convert it to an index to the array (integer between 0 and length of the array - 1). For example:

var a = ['a', 'b', 'c', 'd', 'e', 'f']; var randomValue = a[Math.floor(a.length * Math.random())];

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