摘要：
Array.prototype.my_filter = function(fn, context) { let resArr = [] const me = this const ctx = context ? context : this // 判断上下文 if (typeof fn !== 'f 阅读全文
摘要：
Array.prototype.my_map = function(fn, context) { let resArr = [] const me = this const ctx = context ? context : me // 定义上下文 if (typeof fn !== 'functi 阅读全文