JS中 map, filter, some, every, forEach, for in, for of 用法总结

for、for in和for of和forEach的区别：http://blog.sina.com.cn/s/blog_c112a2980102xqg9.html

JS中 map, filter, some, every, forEach, for in, for of 用法总结：https://blog.csdn.net/gis_swb/article/details/52297343