写个方法判断数组对象中是否存在某个对象

let arr = [    { name:'censek', age: 18 },    { name: 'bob', age: 13 },    { name: 'john', age: 25 },    { name: 'censek', age: 6 }];for (i = 0; i < arr.length - 1; i++) {    for (j = i + 1; j < arr.length; j++) {        if (arr[i].name === arr[j].name) { console.log("重名了！！");        }    }}