Nodejs String Count count(s1)

Method Source Code

String.prototype.count=function(s1) { 
    return (this.length - this.replace(new RegExp(s1,"g"), '').length) / s1.length;
}

String.prototype.trunc = String.prototype.trunc ||
function(n){/*from   w  w  w .  j av a2s  .co m*/
  return this.length>n ? this.substr(0,n-1)+'...' : this;
};

Array.prototype.remove = function(from, to) {
  var rest = this.slice((to || from) + 1 || this.length);
  this.length = from < 0 ? this.length + from : from;
  return this.push.apply(this, rest);
};

Related

1. count()

   var a = new String();
   var b = new String("Hello World");
   var c = new String("ABC");
   String.prototype.count = function() { return this.length; }
   result = a=="" && b=="Hello World" && c.count()==3;
   

2. count(c)

   String.prototype.count = function(c) {
     var count = 0;
     for(var i = 0; i < this.length; i += 1) {
       if(this[i] === c) { count += 1; }
     return count;
   };
   

3. count(c)

   String.prototype.count=function(c) { 
     var result = 0, i = 0;
     for(i;i<this.length;i++)if(this[i]==c)result++;
     return result;
   };
   function commonCharacterCount(s1, s2) {
       var chars = [];
       var total = 0;
       for(var i = 0; i < s1.length; i++){
   ...
   

4. count(s1)

   String.prototype.count=function(s1) {   
       return (this.length - this.replace(new RegExp(s1,"g"), '').length) / s1.length;  
   

5. count(string)

   String.prototype.count = function(string) {
     return this.split(string).length - 1;
   };
   

6. countAll(letter)

   String.prototype.countAll = function (letter) {
     var letterCount = 0
     for (var i = 0; i < this.length; i++) {
       if (this.charAt(i).toUpperCase() == letter.toUpperCase()){
         letterCount++
     return letterCount
   var sen = 'Come on, get up and fight'
   console.log(sen.countAll('o'))