javascript - 重构 JSON 数组

Question

我正在尝试按照以下方式重组 JSON 数组。在输出中，我需要 id 作为键和对象本身作为它的值。

示例输入:

[
    {
        "id": "1",
        "children": [
            {
                "id": "1-1",
                "children": [
                    {
                        "id": "1-1-1",
                        "children": []
                    },
                    {
                        "id": "1-1-2",
                        "children": []
                    }
                ]
            },
            {
                "id": "1-2",
                "children": []
            }
        ]
    },
    {
        "id": "2",
        "children": []
    },
    {
        "id": "3",
        "children": [
            {
                "id": "3-1",
                "children": []
            }
        ]
    }
]

要求的输出:

{
    "1": {
        "id": "1",
        "children": {
            "1-1": {
                "id": "1-1",
                "children": {
                    "1-1-1": {
                        "id": "1-1-1",
                        "children": []
                    },
                    "1-1-2": {
                        "id": "1-1-2",
                        "children": []
                    }
                }
            },
            "1-2": {
                "id": "1-2",
                "children": []
            }
        }
    },
    "2": {
        "id": "2",
        "children": []
    },
    "3": {
        "id": "3",
        "children": {
            "3-1": {
                "id": "3-1",
                "children": []
            }
        }
    }
}

下面的代码几乎给出了所需的答案。

function restruct(arr) {
    var newArray = arr.map(function(obj) {
        var t = {};
        if (obj.children)
            obj.children = restruct(obj.children);
        t[obj.id] = obj;
        return t;
    });
    return newArray;
}

输出是:

[
    {
        "1": {
            "id": "1",
            "children": [
                {
                    "1-1": {
                        "id": "1-1",
                        "children": [
                            {
                                "1-1-1": {
                                    "id": "1-1-1",
                                    "children": []
                                }
                            },
                            {
                                "1-1-2": {
                                    "id": "1-1-2",
                                    "children": []
                                }
                            }
                        ]
                    }
                },
                {
                    "1-2": {
                        "id": "1-2",
                        "children": []
                    }
                }
            ]
        }
    },
    {
        "2": {
            "id": "2",
            "children": []
        }
    },
    {
        "3": {
            "id": "3",
            "children": [
                {
                    "3-1": {
                        "id": "3-1",
                        "children": []
                    }
                }
            ]
        }
    }
]

如果您注意到，除 children 节点外，一切都符合预期输出。它返回对象数组，而我需要带有键值对的对象。有人可以帮我解决这个问题吗？

Answer 1

你不能使用 map 因为它返回一个数组，你可以使用 forEach 代替，比如:

function restruct(arr) {
    var result = {};

    arr.forEach(function(obj) {         
        if (obj.children) {
            obj.children = restruct(obj.children);
        }

        result[obj.id] = obj;
    });
    return result;
}