字符串反转

1、

var strings = '952863174';
console.log(strings.split('').reverse().join(''));

2、

var strings = 'ka3ogaj4jon5vuyn9ug7u';
    function sortString(str) {
      if(str.length === 0 || str.length === 1){
        console.log();
        return str;
      }
      var len = str.length;
      var n = len;
      var tempstr = '';
      while(--n >=0) {
        tempstr += str.charAt(n);
      }
      return tempstr;
    }

    console.log(sortString(strings));