数组中是对象的情况下去重

let arr6 = [{name: 'zs'}, {name: 'zs'}, {name: 'kk'}, {name: 'ql'}, {name: 'kk'}]
let uniqueArr = arr6.filter((item, index) => {
    return arr6.findIndex(obj => obj.name === item.name) === index;
})


打印结果：[ { name: 'zs' }, { name: 'kk' }, { name: 'ql' } ]