var arr = [
    {id: 1, name: 'sli', year: 2012},
    {id: 2, name: 'ap', year: 2015},
    {id: 1, name: 'alslion', year: 2012},
    {id: 3, name: 'pose', year: 2012},
]

//刪除arr中的重復對象
var newArr= [];
var arrId = [];
for(var item of arr){
    if(arrId.indexOf(item['id']) == -1){
        arrId.push(item['id']);
        newArr.push(item);
    }
}
console.log(arrId,newArr);

var arr = [
    {name:'uzi',color:'blue'},
    {name:'pdd',color:'white'},
    {name:'mlxg',color:'orange'},
    {name:'uzi',color:'red'},
]

let hash = {};
var newArr = arr.reduce((item, next) => {
    hash[next.name] ? '' : hash[next.name] = true && item.push(next);
    return item
}, []);
console.log(newArr);

let arr = [
    {name:'黎明',id:21111},
    {name:'王小二',id:1111},
    {name:'大小二',id:3222}
]

arr.splice(arr.findIndex(item => item.id === 3222), 1);