Nodejs String Reverse reverse()

Method Source Code

String.prototype.reverse = function (){
    var t = "";
    for(var i = this.length; i > 0; i--) t = t + this.substring(i - 1, i);
    return t;// ww w . j  ava  2s .com
}
var max = 1000000;
var sum = 0;
var i = 1;
var str_num = null;
for(; i <= max; ++i){
    str_num = i.toString();
    if(str_num !== str_num.reverse()){
        continue;
    }

    bin_num = i.toString(2);
    if(bin_num === bin_num.reverse()){
        sum += i;
    }
}
console.log(sum);

Related

1. reverse()

   String.prototype.reverse = function() {
       return this.split("").reverse().join("");
   };
   String.prototype.wordReverse = function() {
       var word, _i, _len;
       var newMessageArray = [];
       var messageArray = this.split(" ");
       for (_i = 0, _len = messageArray.length; _i < _len; _i++) {
           word = messageArray[_i];
   ...
   

2. reverse()

   String.prototype.reverse = function() {
   var answer = '', l = this.length;
   for (var i = l - 1; i >= 0; i--) {
     answer += this[i];
   return answer;
   

3. reverse()

   String.prototype.reverse = function() {
     var ans = '', l = this.length;
     for (var i = l - 1; i >= 0; i--) {
       ans += this[i];
     return ans;
   

4. reverse()

   String.prototype.reverse = function(){
      var origString = [];
      var revString = [];
      for(var i=this.length-1; i>=0; i--){
         origString.push(this.charAt(i));
      };
      revString = origString.join(""); 
      return this + " "+ revString;
   };
   ...
   

5. reverse()

   String.prototype.reverse = function() {
     var i;
     var str = '';
     for(i = this.length - 1; i > -1; i--) {
       str += this[i];
     return str;
   };
   

6. reverse()

   String.prototype.reverse = function(){
       var dummy = "";
       for (var i = this.length-1; i >= 0; i--) {
           dummy += this[i];
       return dummy;
   

7. reverse()

   String.prototype.reverse = function(){
       return this.split("").reverse().join("");
   };
   var thing = String("supercalifragilisticexpealidocious");
   thing.reverse();
   

8. reverse()

   String.prototype.reverse = function () {
     var splitString = this.split('');
     var reverseArray = splitString.reverse();
     var joinArray = reverseArray.join('');
     return joinArray;
   };
   

9. reverse()

   var str1 = "abcdefghe";
   String.prototype.reverse = function(){
     var temp = "";
     for (var i = this.length-1; i >= 0; i--){
       console.log(this[i]);
       temp = temp + this[i];
     return temp
   function reverse (str) {
       if (str === "") {
           return "";
       } else {
           return reverse(str.substring(1)) + str.charAt(0);