javascript - 下划线 将数组转换为对象键

Question

我正在尝试将此数组转换为对象。使用下划线，我想转换这个数组:

[
{
    "id": "parentA",
    "children": [
        {
            "name": "name1"
        },
        {
            "name": "name2"
        },
        {
            "name": "name3"
        }
    ]
},
{
    "id": "parentB",
    "children": [
        {
            "name": "name4"
        },
        {
            "name": "name5"
        },
        {
            "name": "name6"
        }
    ]
}]

进入一个看起来像这样的对象:

{
    "name1": "parentA",
    "name2": "parentA",
    "name3": "parentA",
    "name4": "parentB",
    "name5": "parentB",
    "name6": "parentB"
}

我真的只是在寻找尽可能最干净/最简单的方法。

Answer 1

这里有一个相当简短的方法来使用两个reduce:

var data = [
{
    "id": "parentA",
    "children": [
        {
            "name": "name1"
        },
        {
            "name": "name2"
        },
        {
            "name": "name3"
        }
    ]
},
{
    "id": "parentB",
    "children": [
        {
            "name": "name4"
        },
        {
            "name": "name5"
        },
        {
            "name": "name6"
        }
    ]
}];

var out = _.reduce(data, function(result, parent) {
  _.reduce(parent.children, function(r, child) {
    r[child.name] = parent.id;
    return r;
  }, result);
  return result;
}, {});

document.write(JSON.stringify(out));

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