JS两个数组对象去除相同的数据

let arr1 = [{uid:'1',name:'当当'},{uid:'2',name:'威威'} ]
let arr2 = [{id:'1',name:'当当',age:'20'},{id:'2',name:'多多',age:'23'},{id:'3',name:'丁丁',age:'24'}]

//ES6的方法，得到新数组

let newArr = arr2 .filter((item) => {
    return  !arr1 .some(ele=>ele.uid===item.id)
});

//ES5的方法，改变原数组

    for (var i=0; i