JSFiddle - React, Tailwind, and code Playground

by soumya gangamwar

JavaScript

var arr = [1,2,3,4,1,2,4,5,1,2];


function countOfDuplicates() {
     var temp = {};
     var count = 1;
     
     for (var i = 0; i < arr.length; i++) {
     			if (arr[i] in temp) {
             count++;
             [arr[i]] = count;
          } else {
             [arr[i]] = count;
          }
         // return temp;
     }
     
     return temp;
     
}