javascript将list转换成树状结构的实例

如下所示：

/**
   * 将list装换成tree
   * @param {Object} myId 数据主键id
   * @param {Object} pId  数据关联的父级id
   * @param {Object} list list集合
   */
  function listToTree(myId,pId,list){
   function exists(list, parentId){
    for(var i=0; i<list.length; i++){
     if (list[i][myId] == parentId) return true;
    }
    return false;
   }
   
   var nodes = [];
   // get the top level nodes
   for(var i=0; i<list.length; i++){
    var row = list[i];
    if (!exists(list, row[pId])){
     nodes.push(row);
    }
   }
   
   var toDo = [];
   for(var i=0; i<nodes.length; i++){
    toDo.push(nodes[i]);
   }
   while(toDo.length){
    var node = toDo.shift(); // the parent node
    // get the children nodes
    for(var i=0; i<list.length; i++){
     var row = list[i];
     if (row[pId] == node[myId]){
      //var child = {id:row.id,text:row.name};
      if (node.children){
       node.children.push(row);
      } else {
       node.children = [row];
      }
      toDo.push(row);
     }
    }
   }
   return nodes;
  }
  
  var list=[
   {"ids":1,"parendId":0,"name":"Foods",url:"wwww"},
   {"ids":2,"parentId":1,"name":"Fruits"},
   {"ids":3,"parentId":1,"name":"Vegetables"},
   {"ids":4,"parentId":2,"name":"apple"},
   {"ids":5,"parentId":2,"name":"orange"},
   {"ids":6,"parentId":3,"name":"tomato"},
   {"ids":7,"parentId":3,"name":"carrot"},
   {"ids":8,"parentId":3,"name":"cabbage"},
   {"ids":9,"parentId":3,"name":"potato"},
   {"ids":10,"parentId":3,"name":"lettuce"},
   
   {"ids":11,"parendId":0,"name":"Foods"},
   {"ids":12,"parentId":11,"name":"Fruits"},
   {"ids":13,"parentId":11,"name":"Vegetables"},
   {"ids":14,"parentId":12,"name":"apple"},
   {"ids":15,"parentId":12,"name":"orange"},
   {"ids":16,"parentId":13,"name":"tomato"},
   {"ids":17,"parentId":13,"name":"carrot"},
   {"ids":18,"parentId":13,"name":"cabbage"},
   {"ids":19,"parentId":13,"name":"potato"},
   {"ids":20,"parentId":13,"name":"lettuce"}
  ];
  
  console.log(JSON.stringify(listToTree("ids","parentId",list)));
  console.log(listToTree("ids","parentId",list));

以上这篇javascript将list转换成树状结构的实例就是小编分享给大家的全部内容了，希望能给大家一个参考，也希望大家多多支持。

# javascript # 树状图 # javascript如何用递归写一个简单的树形结构示例 # JavaScript几种形式的树结构菜单 # JavaScript解析任意形式的json树型结构展示 # js用于树型结构级联选择 # JavaScript 处理树数据结构的方法示例 # 详解JavaScript树结构 # js将列表组装成树结构的两种实现方式分享 # 给大家 # 树状 # 希望能 # 所示 # 这篇 # 转换成 # 小编 # 大家多多 # 主键 # function # lt # length # var # listToTree # exists # parentId # return # row # level # toDo

返回目录在线咨询

上一篇：什么是负面关键词，如何设置_SEO优化教程
下一篇：AI如何改变内容创作行业_SEO优化教程

您的项目需求

*请认真填写需求信息，我们会在24小时内与您取得联系。

全网整合营销服务商

javascript将list转换成树状结构的实例

您的项目需求