题解 | 大写字符串

        function _touppercase(string) {\n            let newStr = ''\n            for( let i = 0 ; i < string.length; i++) {\n                let charCode = string.charCodeAt(i)\n                if(charCode >= 97 && charCode <= 122) {\n                    newStr += String.fromCharCode(charCode - 32)\n                } else {\n                    newStr += string[i]\n                }\n            }\n            return newStr\n   \n}