对以下数据 取出每人(name)最大的销售量(sales)数据 ( 对sales排序对name去重) var arr = [ { name: "小明", year: 2019, sales: 53 }, { name: "小明", year: 2020, sales: 234 }, { name: "小明", year: 2018, sales: 24 }, { name: "小强", year: 2019, sales: 31 }, { name: "小强", year: 2020, sales: 567 }, { name: "小强", year: 2018, sales: 678 }, { name: "小红", year: 2019, sales: 465 }, { name: "小红", year: 2020, sales: 82 }, { name: "小红", year: 2018, sales: 576 }, { name: "小马", year: 2019, sales: 4567 }, { name: "小马", year: 2020, sales: 832 }, { name: "小马", year: 2018, sales: 674 }, ];

你可以使用以下代码来取出每个人的最大销售量数据，并按照销售量进行排序，并去除重复的姓名：

var arr = [
    { name: "小明", year: 2019, sales: 53 },
    { name: "小明", year: 2020, sales: 234 },
    { name: "小明", year: 2018, sales: 24 },
    { name: "小强", year: 2019, sales: 31 },
    { name: "小强", year: 2020, sales: 567 },
    { name: "小强", year: 2018, sales: 678 },
    { name: "小红", year: 2019, sales: 465 },
    { name: "小红", year: 2020, sales: 82 },
    { name: "小红", year: 2018, sales: 576 },
    { name: "小马", year: 2019, sales: 4567 },
    { name: "小马", year: 2020, sales: 832 },
    { name: "小马", year: 2018, sales: 674 },
];

// 根据销售量进行排序
arr.sort(function(a, b) {
    return b.sales - a.sales;
});

var result = {};
arr.forEach(function(item) {
    // 判断是否已存在最大销售量数据
    if (!result[item.name]) {
        result[item.name] = item;
    }
});

// 获取最大销售量数据数组
var output = Object.values(result);

console.log(output);

运行以上代码，你将得到以下结果：

[
    { name: "小马", year: 2019, sales: 4567 },
    { name: "小强", year: 2018, sales: 678 },
    { name: "小红", year: 2018, sales: 576 },
    { name: "小明", year: 2020, sales: 234 }
]

这个结果是根据销售量从大到小排序的，且每个人只保留了其最大销售量的数据，并且去除了重复的姓名。