JSFiddle - React, Tailwind, and code Playground

by Jussia

JavaScript

function duplicateCount(text){
  //...
    var uniqueCount = text.toUpperCase().split("");
    var  count = {};
    var cnt = 0;
    uniqueCount.forEach(function(i) { count[i] = (count[i]||0) + 1;});
 
    console.log('count', count)
       for (var key in count) {
         if (count[key] > 1) {
      cnt++
    }
       }
   return cnt
}

console.log(duplicateCount(""))
console.log(duplicateCount("abcde"))
console.log(duplicateCount("aabbcde"))
console.log(duplicateCount("aabBcde"))
console.log(duplicateCount("Indivisibility"))
console.log(duplicateCount("Indivisibilities"))