let arr =[
{
name:'zhangsan',
age:34
},{
name:'lisi',
age:34
},{
name:'zhangsan',
age:34
},{
name:'lisi',
age:34
},{
name:'zhangsan',
age:34
},{
name:'lisi',
age:34
}
]
let nArr = arr.filter((element,index,self)=>{
return self.findIndex(x=>x.name===element.name) === index
})
console.log(nArr)