Javascript 如何映射和过滤react js中的重复值

如何获取类别id列数据的唯一值 这是我的控制台日志数据

0: {category_id: "37", status: "4", category_name: "GO Thrones"}
1: {category_id: "41", status: "3", category_name: "need for speed"}
2: {category_id: "84", status: "4", category_name: "new"}
3: {category_id: "41", status: "3", category_name: "need for speed"}
4: {category_id: "37", status: "4", category_name: "GO Thrones"}

使用Object.keys（）我们可以使用.reduce（）返回所有唯一的Id值

const data = {
    0: {category_id: "37", status: "4", category_name: "GO Thrones"},
    1: {category_id: "41", status: "3", category_name: "need for speed"},
    2: {category_id: "84", status: "4", category_name: "new"},
    3: {category_id: "41", status: "3", category_name: "need for speed"},
    4: {category_id: "37", status: "4", category_name: "GO Thrones"}
}

const results = (data) => 
    Object.keys(data).reduce((result, key) => {
        (!~result.indexOf(data[key].category_id)) &&
            result.push(data[key].category_id);
        return result
    }, [])


console.log(results(data)); // ​​​​​[ '37', '41', '84' ]​​​​​

为了方便起见，这里将相同的代码重构为一行，虽然显然不那么清晰

const results = (d) => Object.values(d).reduce((r, i) => !~r.indexOf(i.category_id) ? (r.push(i.category_id), r) : r , []);

console.log(results(data)); // ​​​​​[ '37', '41', '84' ]​​​​​

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您希望category_id是唯一的number@MaheerAli对sir@Gnanaseelan预期的outputpendingProductList.map（category=>console.log（“mydata=”，category.category_id））是什么；现在我得到了所有的category_id（37,41,84,41,37）@Gnanaseelan，如果它在数组中不存在，我已经更新为只显示category id