JSFiddle - React, Tailwind, and code Playground

by colorkid

JavaScript

var string = "abaaat";

function count (string) {  
  var arr = string.split('');
  arr.sort();
  var newArr = [];
  alert(arr);
 
 for(var i = 0; i < arr.length; i++){
 	if(arr[i] === arr[i + 1]){
  	newArr.push(arr[i]);

  }
 }
 alert(newArr);
}

count(string);