如何使用lodash从嵌套对象中获取唯一数组

Question

我的收藏集包含以下内容（对象数组）：

[
    {
        id: 'id-1',
        uniqueName: 'operation-level-1',
        operations: [
            {
                name: 'operaion-1',
                label: 'operation-1-label'
            },
            {
                name: 'operaion-2',
                label: 'operation-2-label'
            }
        ]
    },
    {
        id: 'id-2',
        uniqueName: 'operation-level-2'
        operations: [
            {
                name: 'operaion-1',
                label: 'operation-1-label'
            },
            {
                name: 'operaion-3',
                label: 'operation-3-label'
            }
        ]
    }

]

我想获得一个唯一的操作名称和标签的数组，如下所示

const result = [
    {
        name: 'operaion-1',
        label: 'operation-1-label'
    },
    {
        name: 'operaion-2',
        label: 'operation-2-label'
    },
    {
        name: 'operaion-3',
        label: 'operation-3-label'
    }
]

有人可以建议实现这一目标的最佳方法吗？

Answer 1

无需lodash即可轻松完成。您可以先将数据展平，然后将map作为键值对，然后使用Map删除重复的条目：

var data=data=[ { id: 'id-1', uniqueName: 'operation-level-1', operations: [ { name: 'operaion-1', label: 'operation-1-label' }, { name: 'operaion-2', label: 'operation-2-label' } ] }, { id: 'id-2', uniqueName: 'operation-level-2', operations: [ { name: 'operaion-1', label: 'operation-1-label' }, { name: 'operaion-3', label: 'operation-3-label' } ] }];

var result =  [...new Map(data.flatMap(({operations})=>operations).map(k=>([k.name, k]))).values()];

console.log(result);