javascript - 从嵌套 JS 对象中删除其属性后删除空对象-6ren

javascript - 从嵌套 JS 对象中删除其属性后删除空对象

转载作者：行者123 更新时间：2023-11-28 17:00:52

我有一个嵌套 JS 对象，如下所示:

data = {
    "name": "root",
    "children": [{
            "name": "bob",
            "children": []
        },
        {
            "name": "susan",
            "children": []
        },
        {
            "name": "chris",
            "children": []
        },
        {
            "name": "bobo",
            "children": []
        },
        {
            "name": "heather",
            "children": []
        }
    ]
}

通过使用以下递归函数，我可以删除任何属性，无论深度如何:

function search_and_delete(obj, search_term) {
    for (var k in obj) {
        if (typeof obj[k] == "object" && obj[k] !== null) {
            search_and_delete(obj[k], search_term)
        } else {
            if (typeof(obj.name) !== 'undefined') {
                if (obj.name === search_term) {
                    delete obj.name
                    delete obj.children
                }
            }
        }
    }
}

例如:

search_and_delete(data, 'bob')

...产生以下结果:

{
    "name": "root",
    "children": [
       {},   // <------ how do I remove this
       {
            "name": "susan",
            "children": []
       },
       {
            "name": "chris",
            "children": []
       },
       {
            "name": "bobo",
            "children": []
       },
       {
            "name": "heather",
            "children": []
       }
    ]
}

但是这在鲍勃曾经所在的位置留下了一个空物体。我怎样才能删除这个对象并重新索引 JSON 结构，就好像它从未存在过一样？

更新

@CertainPerformance 答案是最接近的，但会产生以下错误:

如果你使用这个照明弹data :

并运行以下命令:

search_and_delete(data, "Interpolator", data)

它的作用是:

最佳答案

一种选择是将父数组传递给递归调用，以便您可以从中拼接找到的项。

因为改变数组会改变每个属性指向的内容，这将使使用 for..in 变得困难 - 使用 Object.values 来迭代对象(或数组):

const data = {
    "name": "root",
    "children": [{
            "name": "bob",
            "children": []
        },
        {
            "name": "susan",
            "children": []
        },
        {
            "name": "chris",
            "children": []
        },
        {
            "name": "bobo",
            "children": []
        },
        {
            "name": "heather",
            "children": []
        }
    ]
}

function search_and_delete(obj, search_term, parent) {
  if (obj.name === search_term) {
    parent.splice(parent.indexOf(obj), 1);
  } else {
    Object.values(obj).forEach((val) => {
      if (val && typeof val === "object") {
          search_and_delete(val, search_term, obj)
      }
    });
  }
}

search_and_delete(data, 'bob');
console.log(data);

使用更深层次结构的示例:

const data = {
 "name": "flare",
 "children": [
  {
   "name": "analytics",
   "children": [
    {
     "name": "cluster",
     "children": [
      {"name": "AgglomerativeCluster", "value": 3938},
      {"name": "CommunityStructure", "value": 3812},
      {"name": "HierarchicalCluster", "value": 6714},
      {"name": "MergeEdge", "value": 743}
     ]
    },
    {
     "name": "graph",
     "children": [
      {"name": "BetweennessCentrality", "value": 3534},
      {"name": "LinkDistance", "value": 5731},
      {"name": "MaxFlowMinCut", "value": 7840},
      {"name": "ShortestPaths", "value": 5914},
      {"name": "SpanningTree", "value": 3416}
     ]
    },
    {
     "name": "optimization",
     "children": [
      {"name": "AspectRatioBanker", "value": 7074}
     ]
    }
   ]
  },
  {
   "name": "animate",
   "children": [
    {"name": "Easing", "value": 17010},
    {"name": "FunctionSequence", "value": 5842},
    {
     "name": "interpolate",
     "children": [
      {"name": "ArrayInterpolator", "value": 1983},
      {"name": "ColorInterpolator", "value": 2047},
      {"name": "DateInterpolator", "value": 1375},
      {"name": "Interpolator", "value": 8746},
      {"name": "MatrixInterpolator", "value": 2202},
      {"name": "NumberInterpolator", "value": 1382},
      {"name": "ObjectInterpolator", "value": 1629},
      {"name": "PointInterpolator", "value": 1675},
      {"name": "RectangleInterpolator", "value": 2042}
     ]
    },
    {"name": "ISchedulable", "value": 1041},
    {"name": "Parallel", "value": 5176},
    {"name": "Pause", "value": 449},
    {"name": "Scheduler", "value": 5593},
    {"name": "Sequence", "value": 5534},
    {"name": "Transition", "value": 9201},
    {"name": "Transitioner", "value": 19975},
    {"name": "TransitionEvent", "value": 1116},
    {"name": "Tween", "value": 6006}
   ]
  },
  {
   "name": "data",
   "children": [
    {
     "name": "converters",
     "children": [
      {"name": "Converters", "value": 721},
      {"name": "DelimitedTextConverter", "value": 4294},
      {"name": "GraphMLConverter", "value": 9800},
      {"name": "IDataConverter", "value": 1314},
      {"name": "JSONConverter", "value": 2220}
     ]
    },
    {"name": "DataField", "value": 1759},
    {"name": "DataSchema", "value": 2165},
    {"name": "DataSet", "value": 586},
    {"name": "DataSource", "value": 3331},
    {"name": "DataTable", "value": 772},
    {"name": "DataUtil", "value": 3322}
   ]
  },
  {
   "name": "display",
   "children": [
    {"name": "DirtySprite", "value": 8833},
    {"name": "LineSprite", "value": 1732},
    {"name": "RectSprite", "value": 3623},
    {"name": "TextSprite", "value": 10066}
   ]
  },
  {
   "name": "flex",
   "children": [
    {"name": "FlareVis", "value": 4116}
   ]
  },
  {
   "name": "physics",
   "children": [
    {"name": "DragForce", "value": 1082},
    {"name": "GravityForce", "value": 1336},
    {"name": "IForce", "value": 319},
    {"name": "NBodyForce", "value": 10498},
    {"name": "Particle", "value": 2822},
    {"name": "Simulation", "value": 9983},
    {"name": "Spring", "value": 2213},
    {"name": "SpringForce", "value": 1681}
   ]
  },
  {
   "name": "query",
   "children": [
    {"name": "AggregateExpression", "value": 1616},
    {"name": "And", "value": 1027},
    {"name": "Arithmetic", "value": 3891},
    {"name": "Average", "value": 891},
    {"name": "BinaryExpression", "value": 2893},
    {"name": "Comparison", "value": 5103},
    {"name": "CompositeExpression", "value": 3677},
    {"name": "Count", "value": 781},
    {"name": "DateUtil", "value": 4141},
    {"name": "Distinct", "value": 933},
    {"name": "Expression", "value": 5130},
    {"name": "ExpressionIterator", "value": 3617},
    {"name": "Fn", "value": 3240},
    {"name": "If", "value": 2732},
    {"name": "IsA", "value": 2039},
    {"name": "Literal", "value": 1214},
    {"name": "Match", "value": 3748},
    {"name": "Maximum", "value": 843},
    {
     "name": "methods",
     "children": [
      {"name": "add", "value": 593},
      {"name": "and", "value": 330},
      {"name": "average", "value": 287},
      {"name": "count", "value": 277},
      {"name": "distinct", "value": 292},
      {"name": "div", "value": 595},
      {"name": "eq", "value": 594},
      {"name": "fn", "value": 460},
      {"name": "gt", "value": 603},
      {"name": "gte", "value": 625},
      {"name": "iff", "value": 748},
      {"name": "isa", "value": 461},
      {"name": "lt", "value": 597},
      {"name": "lte", "value": 619},
      {"name": "max", "value": 283},
      {"name": "min", "value": 283},
      {"name": "mod", "value": 591},
      {"name": "mul", "value": 603},
      {"name": "neq", "value": 599},
      {"name": "not", "value": 386},
      {"name": "or", "value": 323},
      {"name": "orderby", "value": 307},
      {"name": "range", "value": 772},
      {"name": "select", "value": 296},
      {"name": "stddev", "value": 363},
      {"name": "sub", "value": 600},
      {"name": "sum", "value": 280},
      {"name": "update", "value": 307},
      {"name": "variance", "value": 335},
      {"name": "where", "value": 299},
      {"name": "xor", "value": 354},
      {"name": "_", "value": 264}
     ]
    },
    {"name": "Minimum", "value": 843},
    {"name": "Not", "value": 1554},
    {"name": "Or", "value": 970},
    {"name": "Query", "value": 13896},
    {"name": "Range", "value": 1594},
    {"name": "StringUtil", "value": 4130},
    {"name": "Sum", "value": 791},
    {"name": "Variable", "value": 1124},
    {"name": "Variance", "value": 1876},
    {"name": "Xor", "value": 1101}
   ]
  },
  {
   "name": "scale",
   "children": [
    {"name": "IScaleMap", "value": 2105},
    {"name": "LinearScale", "value": 1316},
    {"name": "LogScale", "value": 3151},
    {"name": "OrdinalScale", "value": 3770},
    {"name": "QuantileScale", "value": 2435},
    {"name": "QuantitativeScale", "value": 4839},
    {"name": "RootScale", "value": 1756},
    {"name": "Scale", "value": 4268},
    {"name": "ScaleType", "value": 1821},
    {"name": "TimeScale", "value": 5833}
   ]
  },
  {
   "name": "util",
   "children": [
    {"name": "Arrays", "value": 8258},
    {"name": "Colors", "value": 10001},
    {"name": "Dates", "value": 8217},
    {"name": "Displays", "value": 12555},
    {"name": "Filter", "value": 2324},
    {"name": "Geometry", "value": 10993},
    {
     "name": "heap",
     "children": [
      {"name": "FibonacciHeap", "value": 9354},
      {"name": "HeapNode", "value": 1233}
     ]
    },
    {"name": "IEvaluable", "value": 335},
    {"name": "IPredicate", "value": 383},
    {"name": "IValueProxy", "value": 874},
    {
     "name": "math",
     "children": [
      {"name": "DenseMatrix", "value": 3165},
      {"name": "IMatrix", "value": 2815},
      {"name": "SparseMatrix", "value": 3366}
     ]
    },
    {"name": "Maths", "value": 17705},
    {"name": "Orientation", "value": 1486},
    {
     "name": "palette",
     "children": [
      {"name": "ColorPalette", "value": 6367},
      {"name": "Palette", "value": 1229},
      {"name": "ShapePalette", "value": 2059},
      {"name": "SizePalette", "value": 2291}
     ]
    },
    {"name": "Property", "value": 5559},
    {"name": "Shapes", "value": 19118},
    {"name": "Sort", "value": 6887},
    {"name": "Stats", "value": 6557},
    {"name": "Strings", "value": 22026}
   ]
  },
  {
   "name": "vis",
   "children": [
    {
     "name": "axis",
     "children": [
      {"name": "Axes", "value": 1302},
      {"name": "Axis", "value": 24593},
      {"name": "AxisGridLine", "value": 652},
      {"name": "AxisLabel", "value": 636},
      {"name": "CartesianAxes", "value": 6703}
     ]
    },
    {
     "name": "controls",
     "children": [
      {"name": "AnchorControl", "value": 2138},
      {"name": "ClickControl", "value": 3824},
      {"name": "Control", "value": 1353},
      {"name": "ControlList", "value": 4665},
      {"name": "DragControl", "value": 2649},
      {"name": "ExpandControl", "value": 2832},
      {"name": "HoverControl", "value": 4896},
      {"name": "IControl", "value": 763},
      {"name": "PanZoomControl", "value": 5222},
      {"name": "SelectionControl", "value": 7862},
      {"name": "TooltipControl", "value": 8435}
     ]
    },
    {
     "name": "data",
     "children": [
      {"name": "Data", "value": 20544},
      {"name": "DataList", "value": 19788},
      {"name": "DataSprite", "value": 10349},
      {"name": "EdgeSprite", "value": 3301},
      {"name": "NodeSprite", "value": 19382},
      {
       "name": "render",
       "children": [
        {"name": "ArrowType", "value": 698},
        {"name": "EdgeRenderer", "value": 5569},
        {"name": "IRenderer", "value": 353},
        {"name": "ShapeRenderer", "value": 2247}
       ]
      },
      {"name": "ScaleBinding", "value": 11275},
      {"name": "Tree", "value": 7147},
      {"name": "TreeBuilder", "value": 9930}
     ]
    },
    {
     "name": "events",
     "children": [
      {"name": "DataEvent", "value": 2313},
      {"name": "SelectionEvent", "value": 1880},
      {"name": "TooltipEvent", "value": 1701},
      {"name": "VisualizationEvent", "value": 1117}
     ]
    },
    {
     "name": "legend",
     "children": [
      {"name": "Legend", "value": 20859},
      {"name": "LegendItem", "value": 4614},
      {"name": "LegendRange", "value": 10530}
     ]
    },
    {
     "name": "operator",
     "children": [
      {
       "name": "distortion",
       "children": [
        {"name": "BifocalDistortion", "value": 4461},
        {"name": "Distortion", "value": 6314},
        {"name": "FisheyeDistortion", "value": 3444}
       ]
      },
      {
       "name": "encoder",
       "children": [
        {"name": "ColorEncoder", "value": 3179},
        {"name": "Encoder", "value": 4060},
        {"name": "PropertyEncoder", "value": 4138},
        {"name": "ShapeEncoder", "value": 1690},
        {"name": "SizeEncoder", "value": 1830}
       ]
      },
      {
       "name": "filter",
       "children": [
        {"name": "FisheyeTreeFilter", "value": 5219},
        {"name": "GraphDistanceFilter", "value": 3165},
        {"name": "VisibilityFilter", "value": 3509}
       ]
      },
      {"name": "IOperator", "value": 1286},
      {
       "name": "label",
       "children": [
        {"name": "Labeler", "value": 9956},
        {"name": "RadialLabeler", "value": 3899},
        {"name": "StackedAreaLabeler", "value": 3202}
       ]
      },
      {
       "name": "layout",
       "children": [
        {"name": "AxisLayout", "value": 6725},
        {"name": "BundledEdgeRouter", "value": 3727},
        {"name": "CircleLayout", "value": 9317},
        {"name": "CirclePackingLayout", "value": 12003},
        {"name": "DendrogramLayout", "value": 4853},
        {"name": "ForceDirectedLayout", "value": 8411},
        {"name": "IcicleTreeLayout", "value": 4864},
        {"name": "IndentedTreeLayout", "value": 3174},
        {"name": "Layout", "value": 7881},
        {"name": "NodeLinkTreeLayout", "value": 12870},
        {"name": "PieLayout", "value": 2728},
        {"name": "RadialTreeLayout", "value": 12348},
        {"name": "RandomLayout", "value": 870},
        {"name": "StackedAreaLayout", "value": 9121},
        {"name": "TreeMapLayout", "value": 9191}
       ]
      },
      {"name": "Operator", "value": 2490},
      {"name": "OperatorList", "value": 5248},
      {"name": "OperatorSequence", "value": 4190},
      {"name": "OperatorSwitch", "value": 2581},
      {"name": "SortOperator", "value": 2023}
     ]
    },
    {"name": "Visualization", "value": 16540}
   ]
  }
 ]
};



function search_and_delete(obj, search_term, parent) {
  if (obj.name === search_term) {
    parent.splice(parent.indexOf(obj), 1);
  } else {
    Object.values(obj).forEach((val) => {
      if (val && typeof val === "object") {
          search_and_delete(val, search_term, obj)
      }
    });
  }
}

search_and_delete(data, "Interpolator") 
console.log(data);

关于javascript - 从嵌套 JS 对象中删除其属性后删除空对象，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/57539883/

文章推荐： javascript - 无法读取未定义的属性 'val'

文章推荐： javascript - 动态引用 JQUERY 中的子元素

文章推荐： javascript - Angular js html不更新

javascript - 我需要将文本放在一个中，它位于一个 Div 中，该 Div 位于另一个 Div 中，该 Div 位于另一个 Div 中
我需要将文本放在中在一个 Div 中，在另一个 Div 中，在另一个 Div 中。所以这是它的样子: #document Change PIN
html - 两个背景图像。一个在 HTML 中，一个在 BODY 中。在 Firefox 中，主体图像未呈现
奇怪的事情发生了。我有一个基本的 html 代码。 html，头部， body 。(因为我收到了一些反对票，这里是完整的代码) 这是我的CSS: html { backgroun
ios - 将图像从 asset.xcassets 加载到 imageArray 中，并将其动态加载到 UIImageView 中，该 UIImageView 存在于 UICollectionView 中 - swift
我正在尝试将 Assets 中的一组图像加载到 UICollectionview 中存在的 ImageView 中，但每当我运行应用程序时它都会显示错误。而且也没有显示图像。我在ViewDidLoa
linux - 在 BASH 中，我需要根据 perl 脚本的输出更改一些环境变量。在 tcsh 中，我可以使用别名 eval 组合。不能在 bash 中
我需要根据带参数的 perl 脚本的输出更改一些环境变量。在 tcsh 中，我可以使用别名命令来评估 perl 脚本的输出。 tcsh: alias setsdk 'eval `/localhome/
asp.net - Windows 身份验证适用于 IIS，但不适用于 Kestrel/Microsoft.AspNetCore.Authentication.Negotiate(不在 Chrome 中，有时在 Edge 中，始终在 IE 中)？
我使用 Windows 身份验证创建了一个新的 Blazor(服务器端)应用程序，并使用 IIS Express 运行它。它将显示一条消息“Hello Domain\User!”来自右上方的以下 Ra
java - java 中 Kotlin 中的等价物是什么？
这是我的方法 void login(Event event);我想知道 Kotlin 中应该如何最佳答案在 Kotlin 中通配符运算符是 * 。它指示编译器它是未知的，但一旦知道，就不会有其他类
express - 在 Jade 中，为什么有时我可以按原样使用变量而有时必须将它们包含在#{......} 中？
看下面的代码 for story in book if story.title.length < 140 - var story
c - C 中 strstr() 中 for 循环的错误使用
我正在尝试用 C 语言学习字符串处理。我写了一个程序，它存储了一些音乐轨道，并帮助用户检查他/她想到的歌曲是否存在于存储的轨道中。这是通过要求用户输入一串字符来完成的。然后程序使用 strstr()
c - * 在 sscanf 中，* 在 [] 中
我正在学习 sscanf 并遇到如下格式字符串: sscanf("%[^:]:%[^*=]%*[*=]%n",a,b,&c); 我理解 %[^:] 部分意味着扫描直到遇到 ':' 并将其分配给 a。:
python - 在 Python (2.7.3) 中，如果 str(x) 中的任何字符在 str(y) 中(或 str(y) 在 str(x) 中)，我如何编写一个函数来回答？
def char_check(x,y): if (str(x) in y or x.find(y) > -1) or (str(y) in x or y.find(x) > -1):
ansible - 在 Ansible 中，如何将一行移动到一个 block 中？
我有一种情况，我想将文本文件中的现有行包含到一个新 block 中。 line 1 line 2 line in block line 3 line 4 应该变成 line 1 line 2 line
Django 调试工具栏显示在根 URL 中，但不显示在应用程序 URL 中
我有一个新项目，我正在尝试设置 Django 调试工具栏。首先，我尝试了快速设置，它只涉及将 'debug_toolbar' 添加到我的已安装应用程序列表中。有了这个，当我转到我的根 URL 时，调试
r - 在 R 中，Matlab 中 @ 函数句柄的等价物是什么？
在 Matlab 中，如果我有一个函数 f，例如签名是 f(a,b,c)，我可以创建一个只有一个变量 b 的函数，它将使用固定的 a=a1 和 c=c1 调用 f: g = @(b) f(a1, b,
swiftui - SwiftUI 中 ScrollView 中 VStack 元素中的神秘间距或填充
我不明白为什么 ForEach 中的元素之间有多余的垂直间距在 VStack 里面在 ScrollView 里面使用 GeometryReader 时渲染自定义水平分隔线。 Scrol
cookies - 什么应该存储在 session 中，什么应该存储在 cookie 中？
我想知道，是否有关于何时使用 session 和 cookie 的指南或最佳实践？什么应该和什么不应该存储在其中？谢谢! 最佳答案这些文档很好地了解了 session cookie 的安全问题以及
python - Python 中 matplotlib 中 3d 直方图的奇怪行为
我在 scipy/numpy 中有一个 Nx3 矩阵，我想用它制作一个 3 维条形图，其中 X 轴和 Y 轴由矩阵的第一列和第二列的值、高度确定每个条形的是矩阵中的第三列，条形的数量由 N 确定。
c - c 中 sem_init(...) 中 value 参数的不同用法
假设我用两种不同的方式初始化信号量 sem_init(&randomsem,0,1) sem_init(&randomsem,0,0) 现在， sem_wait(&randomsem) 在这两种情况下
c - 实际值存储在 pstr 中，但是该值如何存储在数组 "WORD"中
我怀疑该值如何存储在“WORD”中，因为 PStr 包含实际输出。？既然Pstr中存储的是小写到大写的字母，那么在printf中如何将其给出为“WORD”。有人可以吗？解释一下？ #include
javascript - 数组索引选择像在 numpy 中，但在 javascript 中
我有一个 3x3 数组: var my_array = [[0,1,2], [3,4,5], [6,7,8]]; 并想获得它的第一个 2
javascript - 在 Javascript 中，如何检测浏览器窗口何时在 View 中？
我意识到您可以使用如下方式轻松检查焦点: var hasFocus = true; $(window).blur(function(){ hasFocus = false; }); $(win

行者123

个人简介

我是一名优秀的程序员,十分优秀！

作者热门文章

滴滴打车优惠券免费领取

全站热门文章

首页

博学

6Ren·AI

商城

javascript - 从嵌套 JS 对象中删除其属性后删除空对象