Count the number of occurrences of a character in a string in Javascript

Question

I need to count the number of occurrences of a character in a string.

For example, suppose my string contains:

var mainStr = \"str1,str2,str3,str4\";         


        

Answer 1

Add this function to sting prototype :

String.prototype.count=function(c) { 
  var result = 0, i = 0;
  for(i;i

usage:

console.log("strings".count("s")); //2