JSFiddle - React, Tailwind, and code Playground

by Amir Danish

JavaScript

let str = "aabgrhaab"
let charMap = {}

for(var char of str) {
   if(charMap.hasOwnProperty(char)){
      charMap[char]++
   } else {
     charMap[char] = 1
   }
}
function countCharacters(char, string) {
  return string.split('').reduce((acc, ch) => ch === char ? acc + 1: acc, 0)
}
console.log(countCharacters(9,str));