javascript - 求一個最優雅的資料處理辦法？

Question

已知endorsement array, 要求寫一個function實作想要輸出的結果：

// function input 
var endorsements = [ 
{ skill: 'javascript', user: 'Chad' }, 
{ skill: 'javascript', user: 'Bill' }, 
{ skill: 'javascript', user: 'Sue' }, 
{ skill: 'html', user: 'Sue' }, 
{ skill: 'css', user: 'Sue' }, 
{ skill: 'css', user: 'Bill' } 
]; 

// function output 
[ 
{ skill: 'javascript', user: [ 'Chad', 'Bill', 'Sue' ], count: 3 }, 
{ skill: 'css', user: [ 'Sue', 'Bill' ], count: 2 }, 
{ skill: 'html', user: [ 'Sue' ], count: 1 } 
];

Answer 1

雷雷