{"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":""}