const arr2 = [{id:1,name:'张三'},{id:2,name:'李四'},{id:1,name:'张三'},{id:2,name:'李四'}]
const newArr = arr2.filter((currentValue,currentIndex,selfList)=>{
return selfList.findex(x=>x.name===currentValue.name)===currentIndex
//找出符合的第一个下标等于去重
})
console.log(newArr)