ex07.js

/*
Given an Array of strings, use Array#reduce to create an object that contains the number of times each string occured in the array. Return the object directly (no need to console.log).

Example

    var inputWords = ['Apple', 'Banana', 'Apple', 'Durian', 'Durian', 'Durian']

    console.log(countWords(inputWords))

    // =>
    // {
    //   Apple: 2,
    //   Banana: 1,
    //   Durian: 3
    // }

*/

function countWords(words) {
  return words.reduce(function(acc, word) {
    if(acc.hasOwnProperty(word)) {
      acc[word] = acc[word] + 1;
    } else {
      acc[word] = 1;
    }
    return acc;
  }, {});
}

var inputWords = ['Apple', 'Banana', 'Apple', 'Durian', 'Durian', 'Durian']

console.log(countWords(inputWords))