已知endorsement array, 要求寫一個function實現(xiàn)想要輸出的結(jié)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 } ];