``` var arr = [ {name : '张三' , age : '10'}, {name : '李四', age : '18'}, {name : '王五', age : '15'} , {name : '李四', age : '12'} ] let obj = {} let shu = arr.reduce((cur,next) => { obj[next.name] ? '' : obj[next.name] = true && cur.push(next) return cur },[]) console.log(shu) ```