javascript - 如何在 Javascript 中合并和过滤两个对象数组？

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我有以下内容:

var owners = [{
  "ownerid": "11",
  "name": "jane",
  "sex": "female"
}, {
  "ownerid": "22",
  "name": "mike",
  "sex": "male"
}, {
  "ownerid": "33",
  "name": "alex",
  "sex": "male"
}];

var cars = [{
  "ownerid": "11",
  "make": "ford",
  "model": "mustang"
}, {
  "ownerid": "11",
  "make": "honda",
  "model": "civic"
}, {
  "ownerid": "33",
  "make": "toyota",
  "model": "corolla"
}];

我想以这个结束

var mergedandfiltered = [{
  "name": "jane",
  "sex": "female",
  "make": "ford",
  "model": "mustang"
}, {
  "name": "jane",
  "sex": "female",
  "make": "honda",
  "model": "civic"
}, {
  "name": "alex",
  "sex": "male",
  "make": "toyota",
  "model": "corolla"
}];

这个想法是合并和过滤结果，这样我就有了所有者、所有者属性(property)以及他们拥有的汽车和汽车属性(property)的列表。迈克没有任何汽车，因此不会显示在结果中。 “ownerid”是通用链接，但我不需要它在结果中显示。

请首选纯JS解决方案!

Answer 1

首先构建一个对象以供车主引用，然后迭代汽车，并组合一个新对象。

var owners = [{ "ownerid": "11", "name": "jane", "sex": "female" }, { "ownerid": "22", "name": "mike", "sex": "male" }, { "ownerid": "33", "name": "alex", "sex": "male" }],
    cars = [{ "ownerid": "11", "make": "ford", "model": "mustang" }, { "ownerid": "11", "make": "honda", "model": "civic" }, { "ownerid": "33", "make": "toyota", "model": "corolla" }],
    obj = {},
    result;

owners.forEach(function (a) {
    obj[a.ownerid] = a;
});

result = cars.map(function (a) {
    return {
        name: obj[a.ownerid].name,
        sex: obj[a.ownerid].sex,
        make: a.make,
        model: a.model
    };
});

document.write('<pre>' + JSON.stringify(result, 0, 4) + '</pre>');