Write some code that will change this data structure

data.js

// Given
var endorsements = [
  { skill: 'css', user: 'Bill' },
  { skill: 'javascript', user: 'Chad' },
  { skill: 'javascript', user: 'Bill' },
  { skill: 'css', user: 'Sue' },
  { skill: 'javascript', user: 'Sue' },
  { skill: 'html', user: 'Sue' }
];
 
// Result
[
  { skill: 'javascript', user: [ 'Chad', 'Bill', 'Sue' ], count: 3 },
  { skill: 'css', user: [ 'Sue', 'Bill' ], count: 2 },
  { skill: 'html', user: [ 'Sue' ], count: 1 } 
  
//Answer
  

var skillObj = {};

for(var i = 0; i < endorsements.length; i ++) {
  var endorsement = endorsements[i];
  
  var skill = endorsement.skill;
  var user = endorsement.user;
  
  skillObj[skill] = skillObj[skill] || [];
  skillObj[skill].push(user);
}

// console.log(skillObj)

var skillArr = [];

for (var key in skillObj) {
  var obj = {
    skill: key,
    users: skillObj[key],
    count: skillObj[key].length
  };
  skillArr.push(obj);
}

console.log(skillArr);