题解 | #Array.reduce#
Array.reduce
https://www.nowcoder.com/practice/213d0ef21cb841de8cf69fcc5ea60eb6
{"html":"<!DOCTYPE html>\n<html>\n\n<head>\n <meta charset=\"UTF-8\">\n <style>\n /* 填写样式 */\n </style>\n</head>\n\n<body>\n <!-- 填写标签 -->\n <script type=\"text/javascript\">\n // 填写JavaScript\n Array.prototype._reduce = function(fn, initial) {\n if(typeof fn !== 'function') {\n return;\n }\n const arr = this;\n let res;\n if(initial) {\n res = fn(initial, arr[0], 0, arr)\n } else {\n res = arr[0]\n }\n for(let i=1;i< arr.length;i++) {\n res = fn(res, arr[i], i, arr)\n }\n\n return res;\n }\n \n </script>\n</body>\n\n</html>","css":"","js":""}
阿里云工作强度 694人发布