usecase-of-map-with-objects.js

const someString = "hey there hey what up what"

const howMany = (blah) => {
  let arrOfWords = blah.split(" ");
  const mappedObj = {};
  for(let i=0; i<arrOfWords.length; i++){
    if(mappedObj[arrOfWords[i]]){
      mappedObj[arrOfWords[i]]++
    } else {
      mappedObj[arrOfWords[i]]=1
    }
  }
  return mappedObj;
}

howMany(someString);

// { 
//   hey: 2, 
//   there: 1, 
//   what: 2, 
//   up: 1 
// }