Nodejs String Encode encode()

Method Source Code

String.prototype.encode = function() {
   var reference = "abcdefghijklmnopqrstuvwxyz !'.?;,";
   var encoding = ",;?.'! zyxwvutsrqponmlkjihgfedcba";
   var input = this.valueOf().toLowerCase();
   var output = "";
   var n, p;/*from  w  w w.j a va2  s .c  o  m*/
   
   for (n=0; n<input.length; n++) {
      // find location of character in reference string
      p = reference.indexOf(input.charAt(n));
      // grab character at that location in encoded string
      output += encoding.charAt(p);
   }
   
   return output;
};

String.prototype.decode = function() {
   var reference = "abcdefghijklmnopqrstuvwxyz !'.?;,";
   var encoding = ",;?.'! zyxwvutsrqponmlkjihgfedcba";
   var input = this.valueOf().toLowerCase();
   var output = "";
   var n, p;
   
   for (n=0; n<input.length; n++) {
      // find location of character in reference string
      p = encoding.indexOf(input.charAt(n));
      // grab character at that location in encoded string
      output += reference.charAt(p);
   }         
   
   return output;
};

Related

1. encode()

   String.prototype.encode = function() {
       return encodeURIComponent( String( this ) );
   };
   

2. encode(str)

   String.prototype.encode = function(str) {
     var chars = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/=';
     var encoded = [];
     var c = 0;
     while (c < str.length) {
         var b0 = str.charCodeAt(c++);
         var b1 = str.charCodeAt(c++);
         var b2 = str.charCodeAt(c++);
         var buf = (b0 << 16) + ((b1 || 0) << 8) + (b2 || 0);
   ...