var arr = [1, 2, 3, 4, 5, 6, 7, 8, 9]; arr.map(String); //结果： [‘1‘, ‘2‘, ‘3‘, ‘4‘, ‘5‘, ‘6‘, ‘7‘, ‘8‘, ‘9‘]
var a = [‘1‘, ‘2‘, ‘3‘, ‘4‘, ‘5‘, ‘6‘, ‘7‘, ‘8‘, ‘9‘] a.map(Number); //结果：[1, 2, 3, 4, 5, 6, 7, 8, 9]
感谢https://www.cnblogs.com/web-record/p/10208485.html
数组里的字符串转换成数字或者把数字转换成字符串 【1，2，3】==【"1","2","3"】
原文：https://www.cnblogs.com/snowbxb/p/14812871.html