如何在数组中获取对象的对象键

Question

下面是我从API调用中获得的数据

{
"articles": {
    "articles": [
        {
            "active": true,
            "scanCodes": [
                "356448",
                "875736475896"
            ],
            "stock": {
                "1": {
                    "stockCurrent": 6.0,
                    "stockCustomValue": 0.0,
                    "stockMinimum": 4.0,
                    "stockTarget": 14.0
                }
            },
            "taxRate": 7.0
        },
        {
            "active": true,
            "scanCodes": [
                "682360596",
                "2355235",
                "235235235"
            ],
            "stock": {
                "1": {
                    "stockCurrent": 1.0,
                    "stockCustomValue": 1.0,
                    "stockMinimum": 2.0,
                    "stockTarget": 6.0
                },
                "3": {
                    "stockCurrent": 4.0,
                    "stockCustomValue": 0.0,
                    "stockMinimum": 2.0,
                    "stockTarget": 7.0
                }
            },
            "taxRate": 7.0
        },
        {
            "active": true,
            "scanCodes": [
                "50001112547160"
            ],
            "stock": {
                "1": {
                    "stockCurrent": 1.0,
                    "stockCustomValue": 1.0,
                    "stockMinimum": 2.0,
                    "stockTarget": 7.0
                },
                "2": {
                    "stockCurrent": 2.0,
                    "stockCustomValue": 0.0,
                    "stockMinimum": 0.0,
                    "stockTarget": 1.0
                }
            },
            "taxRate": 7.0
        },
    ]
}
}

我只需要每一篇文章的唯一对象键，比如"1"，"2"，"3"，"5"....etc

我已经尝试过这个代码，还有很多其他的，但是还没有得到正确的结果，请帮帮我，我会非常感谢你的。

resp.data.articles.articles.
                        reduce((p, c) => {
                            let { stock } = c
                            return { ...p.stock + Object.keys(stock) };
                        }, {})

Answer 1

以下是一个简单的解决方案：

const arr = [];
data.articles.articles.forEach(article => arr.push(...Object.keys(article.stock)));
const requiredList = [...new Set(arr)];

Answer 2

这里要循环的是作为数组的项目，每个项目都有一个对象的库存数组，您需要键。

let art = data.articles.articles;
let stockIds = [];
// loop through the articles
for (let a in art) {
    // loop throgh the stock array in each article
    for (let s in art[a].stock) {
        // Grab the stock key
        stockIds.push(s);
  }
}

//remove duplicates
let uniqueStockIds = uniq = [...new Set(stockIds)]