我希望树中的所有单个节点都合并到其父节点中,但如果其子节点包含两个或更多子节点,则不做任何更改。
下面是我的数据模型示例:

[{
        name: "HOME",
        value: [{//Only node merged into the parent level
            name: "HOME",
            value: [{//Only node merged into the parent level
                name: "HOME",
                id: '1000'
            }]
        }]
    }, {
        name: "ARTICLE",
        value: [{
            name: "ARTICLE",
            value: [{
                name: "ARTICLE TYPE 1",
                id: '2001'
            },{
                name: "ARTICLE TYPE 2",
                id: '2002'
            }]
        },{
            name: "ARTICLE",
            value: [{//Only node merged into the parent level
                name: "ARTICLE TYPE 3",
                id: '2003'
            }]
        }]
    }]

我想这样过滤数据:
    [{
        name: "HOME",
        id: 1000
    }, {
        name: "ARTICLE",
        value: [{
            name: "ARTICLE",
            value: [{
                name: "ARTICLE TYPE 1",
                id: '2001'
            },{
                name: "ARTICLE TYPE 2",
                id: '2002'
            }]
        },{
            name: "ARTICLE TYPE 3",
            id: '2003'
        }]
    }]

//更新1:
这是个想法,但是现在出现了一个问题,发现节点不能退回到原来的节点,只能修改当前的父节点:
function filter(data){
    for(var i = 0; i < data.length; i++){
        if( !data[i].value ) continue;

        //Check whether there are child nodes "value" is because it contains a "value" does not exist "id",
        //you must enter a recursive make the following checks
        if( data[i].value.length === 1 && !data[i].value[0].value ) {
            data[i].id = data[i].value[0].id;
            delete data[i].value;
            continue;
        }
        filter( data[i].value );
    }
    return data;
}

我现在直接修改原来的对象,不知道这样做是否合理。
//更新2:
我最后的措词是这样的,结果输出似乎是正确的,但不确定逻辑是正确的,而且看起来很难看,还是不知道是否有更好的解决方案?
function filter(data, parent){
    for(var i = 0; i < data.length; i++){
        if( data[i].value ) filter( data[i].value, data[i] );

        if( parent && data.length === 1 && !data[i].value ) {
            parent.id = data[i].id;
            delete parent.value;
        }
    }
    return data;
}

最佳答案

简单的版本

function merge(node){
    if(node.value){
        var children = node.value.map(merge);
        return children.length === 1?
            children[0]:
            {
                name: node.name,
                value: children
            };
    }
    return node;
}
var result = data.map(merge);

大概是:
function cp(a, b){
    for(var k in b){
        if(k === "value" || k in a) continue;
        a[k] = b[k];
    }
    return a;
}

function merge(node){
    if(node.value){
        var children = node.value.map(merge);
        return children.length===1 && !("value" in children[0])?
            cp(children[0], node):
            cp({ value: children }, node);
    }
    return cp({}, node);
}
var result = data.map(merge);

07-25 21:42
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