我有汽车对象数组，我想返回基于数组的 对包含 2 个值对 var cars =
的对象进行赋值[ { make: 'audi', model: 'r8', year: '2012' }
, { make: 'ford', model: 'mustang', year: '2012' }
, { make: 'ford', model: 'fusion', year: '2015' }
, { make: 'kia', model: 'optima', year: '2012' }
, { make: 'audi', model: 'rs5', year: '2013' }]
输出像
[ { Id: 'audi-group', value: 'audi-group' } , { id: 'r8', value:
'2012' } , { id: 'r5', value: '2013' }, {id:'ford-group',
value:'ford-group'}, {id: 'fusion', value: '2015' } //... ]
所有基于“make”的订单都应该来