请教一下怎么将路径数组转为树形结构 - V2EX
V2EX = way to explore
V2EX 是一个关于分享和探索的地方
现在注册
已注册用户请  登录
Yukee798
V2EX    问与答

请教一下怎么将路径数组转为树形结构

  •  
  •   Yukee798 2022-03-17 11:11:59 +08:00 2111 次点击
    这是一个创建于 1308 天前的主题,其中的信息可能已经有所发展或是发生改变。

    现在我拿到了类似下面这样的路径数组,里面路径嵌套层级不确定。

    [ "./home/analysis", "./home/boardTodo", "./home/dairy", "./home", "./home/todo", "./index", "./profile" ] 

    我想把它转换为下面这种树形结构:

    [ { path: "/home", children: [ { path: "/home/analysis", }, { path: "/home/boardTodo", }, { path: "/home/dairy", }, { path: "/home/todo", } ] }, { path: "/index", }, { path: "/profile", } ] 
    12 条回复    2022-03-17 16:09:57 +08:00
    stillsilly
        1
    stillsilly  
       2022-03-17 11:25:33 +08:00
    要什么语言的代码
    wxlwsy
        2
    wxlwsy  
       2022-03-17 11:43:11 +08:00
    这....手写不难吧
    stillsilly
        3
    stillsilly  
       2022-03-17 11:46:14 +08:00   1
    只有两层的话,两个循环就行了
    let arr = [
    "./home/analysis",
    "./home/boardTodo",
    "./home/dairy",
    "./home",
    "./home/todo",
    "./index",
    "./profile"
    ]

    let tree = format(arr)
    console.log(tree)

    function format(arr) {
    let paths = arr.map(path => {
    return path.replace(/^.\//, '').split('/').map(p => '/' + p)
    })

    let result = []
    getLevel1()
    getLevel2()

    function getLevel1() {
    paths.forEach(p => {
    if (p.length === 1) {
    result.push({
    path: p[0],
    children: []
    })
    }
    })
    }

    function getLevel2() {
    paths.forEach(p => {
    let node = result.find(r => r.path === p[0])
    if (p.length !== 1) {
    node.children.push({
    path: '.' + p.join('')
    })
    }
    })
    }

    return result
    }
    stillsilly
        4
    stillsilly  
       2022-03-17 11:47:16 +08:00
    排版好乱,我试一下能不能用 markdown
    ```
    let arr = [
    "./home/analysis",
    "./home/boardTodo",
    "./home/dairy",
    "./home",
    "./home/todo",
    "./index",
    "./profile"
    ]

    let tree = format(arr)
    console.log(tree)

    function format(arr) {
    let paths = arr.map(path => {
    return path.replace(/^.\//, '').split('/').map(p => '/' + p)
    })

    let result = []
    getLevel1()
    getLevel2()

    function getLevel1() {
    paths.forEach(p => {
    if (p.length === 1) {
    result.push({
    path: p[0],
    children: []
    })
    }
    })
    }

    function getLevel2() {
    paths.forEach(p => {
    let node = result.find(r => r.path === p[0])
    if (p.length !== 1) {
    node.children.push({
    path: '.' + p.join('')
    })
    }
    })
    }

    return result
    }br />

    ```
    stillsilly
        5
    stillsilly  
       2022-03-17 11:48:58 +08:00
    楼主对不起 我污染了这个帖子…… /捂脸逃走
    Yukee798
        6
    Yukee798  
    OP
       2022-03-17 11:53:08 +08:00
    @stillsilly #5 很感谢你的回复,但是里面的路径层级是不确定的,应该会用上递归,但是我没写出来
    Yukee798
        7
    Yukee798  
    OP
       2022-03-17 12:00:42 +08:00
    @stillsilly #5 不好意思 = = 刚刚没有仔细看完代码,我自己改了一下,限制了最大层级,已经能满足我的需求了,很感谢。
    GuuJiang
        8
    GuuJiang  
       2022-03-17 12:04:09 +08:00 via iPhone   3
    Trie ,只不过把标准 Trie 里的单个字母换成路径里的一级
    lyminghao
        9
    lyminghao  
       2022-03-17 13:45:24 +08:00
    建一个 map: path_string -> set
    把每个 path 分级依次插进去,最后统一输出?
    gydi
        10
    gydi  
       2022-03-17 14:15:17 +08:00   1
    murmur
        11
    murmur  
       2022-03-17 14:17:56 +08:00   1
    https://www.npmjs.com/package/path-list-to-tree

    这种东西不需要自己写吧
    Yukee798
        12
    Yukee798  
    OP
       2022-03-17 16:09:57 +08:00
    感谢大家,最后我采用的 Trie 方案,其实写这个东西就是想动态配置一下 React 路由,那个路径数组是用的 require.context 生成的,目前测试了几遍,应该是没问题了,我把完整代码贴出来:
    https://gist.github.com/Yukee-798/3131f9c9b34364e9110f3028abe058aa
    关于     帮助文档     自助推广系统     博客     API     FAQ     Solana     5502 人在线   最高记录 6679       Select Language
    创意工作者们的社区
    World is powered by solitude
    VERSION: 3.9.8.5 31ms UTC 01:26 PVG 09:26 LAX 18:26 JFK 21:26
    Do have faith in what you're doing.
    ubao msn snddm index pchome yahoo rakuten mypaper meadowduck bidyahoo youbao zxmzxm asda bnvcg cvbfg dfscv mmhjk xxddc yybgb zznbn ccubao uaitu acv GXCV ET GDG YH FG BCVB FJFH CBRE CBC GDG ET54 WRWR RWER WREW WRWER RWER SDG EW SF DSFSF fbbs ubao fhd dfg ewr dg df ewwr ewwr et ruyut utut dfg fgd gdfgt etg dfgt dfgd ert4 gd fgg wr 235 wer3 we vsdf sdf gdf ert xcv sdf rwer hfd dfg cvb rwf afb dfh jgh bmn lgh rty gfds cxv xcv xcs vdas fdf fgd cv sdf tert sdf sdf sdf sdf sdf sdf sdf sdf sdf sdf sdf sdf sdf sdf sdf sdf sdf sdf sdf sdf sdf sdf sdf sdf sdf sdf sdf sdf sdf sdf sdf sdf sdf sdf sdf sdf sdf sdf sdf sdf shasha9178 shasha9178 shasha9178 shasha9178 shasha9178 liflif2 liflif2 liflif2 liflif2 liflif2 liblib3 liblib3 liblib3 liblib3 liblib3 zhazha444 zhazha444 zhazha444 zhazha444 zhazha444 dende5 dende denden denden2 denden21 fenfen9 fenf619 fen619 fenfe9 fe619 sdf sdf sdf sdf sdf zhazh90 zhazh0 zhaa50 zha90 zh590 zho zhoz zhozh zhozho zhozho2 lislis lls95 lili95 lils5 liss9 sdf0ty987 sdft876 sdft9876 sdf09876 sd0t9876 sdf0ty98 sdf0976 sdf0ty986 sdf0ty96 sdf0t76 sdf0876 df0ty98 sf0t876 sd0ty76 sdy76 sdf76 sdf0t76 sdf0ty9 sdf0ty98 sdf0ty987 sdf0ty98 sdf6676 sdf876 sd876 sd876 sdf6 sdf6 sdf9876 sdf0t sdf06 sdf0ty9776 sdf0ty9776 sdf0ty76 sdf8876 sdf0t sd6 sdf06 s688876 sd688 sdf86