Nodejs String Sub String sub(pattern, replacement, count)

Method Source Code

String.prototype.sub = function(pattern, replacement, count) {
   replacement = this.gsub.prepareReplacement(replacement);
   count = count === undefined ? 1 : count;

   return this.gsub(pattern, function(match) {
      if (--count < 0) return match[0];
      return replacement(match);
   });/*from   ww  w. j  av a 2  s  .  c  o  m*/
};

Related

1. sub(pattern, replacement, count)

   String.prototype.sub = function(pattern, replacement, count) {
     var replacer = Object.isFunction(replacement) ?
       replacement :
       function(){ return replacement };
     count = Object.isUndefined(count) ? 1 : count;
     return this.gsub(pattern, function(match) {
       if (--count < 0) return match[0];
       return replacer(match);
     });
   ...
   

2. subString()

   String.prototype.subString = function(){
       var arr = [];
       for(var i = 0; i < this.length; i++){
           for(var j = i + 1; j < this.length + 1; j++){
               arr.push(this.slice(i, j));
       return arr;
   console.log("dog".subString());
   

3. subString()

   String.prototype.subString = function()   
     var subset = [];  
     for (var m = 0; m < this.length; m++)   
       for (var n = m+1; n<this.length+1; n++)   
         subset.push(this.slice(m,n));  
     return subset;  
   };  
   console.log("dog".subString());
   

4. subStringCounter(searchString)

   var text = 'this is  test test test we in are is';
   String.prototype.subStringCounter = function (searchString) {
       var position = 0,
           counter = 0;
       searchString = searchString.toLowerCase();
       while (this.indexOf(searchString, position) >= 0) {
           counter += 1;
           position = this.toLowerCase().indexOf(searchString, position) + 1;
       return counter;
   };
   console.log(text.subStringCounter('in'));
   console.log(text.subStringCounter('we'));