Carthook Support Engineer Interview

carthook-1.js

//2. Write a short javascript function that displays the first non repeating character in a string.Example: If the string is "Alphabet", it would print out the letter "l"
function firstUnrepeatedLetter (word){
  word = word.toLowerCase();
  let hash = {};
  for(let char of word){
    if(!hash[char])
      hash[char] = 1;
    else
    hash[char] += 1;
  }

  for(let key of Object.keys(hash)){
    if(hash[key] === 1)
      return key;
  }
}