javascript - 在javascript中将键添加到数组

Question

我有一个数据数组，第一行是标题:

[["Date", "Key1", "Key2", "Key3", "Key4"],
["2018-11-01", "254", "-", "-", "-"],
["2018-11-02", "648", "-", "-", "-"],
["2018-11-03", "270", "170", "-", "147"],
["2018-11-04", "300", "406", "136", "208"]]

我希望能够将它与 D3 库图形一起使用的输出是:

[[Date: "2018-11-01", Key1: "254", Key2: "-", Key3: "-", Key4: "-"],
[Date: "2018-11-02", Key1: "648", Key2: "-", Key3: "-", Key4: "-"],
[Date: "2018-11-03", Key1: "270", Key2: "170", Key3: "-", Key4: "147"],
[Date: "2018-11-04", Key1: "300", Key2: "406", Key3: "136", Key4: "208"]]

我尝试了许多不成功的变体来使用 javascript，使用 map 来做到这一点。但我做不到……键是动态的，所以我不能使用固定键。有人能帮我吗？谢谢你!曼努埃

Answer 1

对于对象数组，您可以映射值并获取映射对象，这些对象被分配给单个对象。

var data = [["Date", "Key1", "Key2", "Key3", "Key4"], ["2018-11-01", "254", "-", "-", "-"], ["2018-11-02", "648", "-", "-", "-"], ["2018-11-03", "270", "170", "-", "147"], ["2018-11-04", "300", "406", "136", "208"]],
    result = data.slice(1).map(a => Object.assign(...a.map((v, i) => ({ [data[0][i]]: v }))));
    
console.log(result);

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