log(flatTree); 2. 使用迭代(栈) function flattenTree(tree) { const result = []; const stack = [...tree]; while (stack.length) { const node = stack.pop(); result.push(node); if (node.children) { stack.push(...node.children); } } return result; } // 示例 const tree = [...
console.log(arrayToTree(flatArr,0));//不改变原数组的方法functionarrayToTree2(items) { const result= [];//存放结果集const itemMap = {};//for(const item of items) { const id=item.id; const pid=item.pid;if(!itemMap[id]) { itemMap[id]={ children: [], }; } itemMap[id]={ ...
javascript复制代码 const flat = [ { id: 1, parentId: null }, { id: 2, parentId: 1 }, { id: 3, parentId: 1 }, { id: 4, parentId: 2 }, { id: 5, parentId: 3 } ]; const tree = arrayToTree(flat); console.log(JSON.stringify(tree, null, 2)); 1. 2. 3. 4. 5....
JS从扁平array转tree 有时我们需要从扁平的数组结构(flat array),根据id,和pid构建出树形数组结构(tree array),这种情形经常出现在嵌套的目录结构,如下图: 或者企业的部门架构,也会出现上面的类似结构。 类似上面的情景,假如我们有以下的数据: letentries = [{"id":"12","parentId":"0","text":"Man","l...
parentId 为根节点 idfunctionarrayToTree(arr,parentId){// 将所有对象存到 map 中constmap=arr.reduce((prev,cur)=>{// 注意:这里是浅拷贝,会修改原数组,当后续再使用原数组会出问题prev[cur.id]=cur;returnprev;},{});// 定义返回结果数组letresult=[];// 遍历传入的对象for(leti=0;i<arr....
function convertToTree(flatData) { let treeData = []; let map = new Map(); let outputObj, pid; for (let i = 0; i < flatData.length; i++) { pid = flatData[i].pid; if (map.has(pid)) { if (!map.get(pid).childrens) ...
treeData生成树结构数据 ascArr数组升序 descArr数组降序 shuffle随机排序 takeArray截取数组开始指定的元素 takeLastArray截取数组最后指定的元素 cloneArray克隆数组 maxArray数组中最大值 minArray数组中最小值 validArray去除数组中的无效值 二、对象 isObjectEqual检查两个对象各项值相等 ...
Modular Genealogy - Genealogy / family tree management system using Laravel 5.7, Vue.js 2.5 and various components. Work in progress. Minimal Notes - Web app build with Vue.js Roast - An app built to help coffee enthusiasts find their next cup of coffee while learning about Laravel + Vue....
flatMap([1, 2], it => [it, it]); // => [1, 1, 2, 2] Iterator.from(function * (i) { while (true) yield i++; }(1)) .drop(1).take(5) .filter(it => it % 2) .map(it => it ** 2) .toArray(); // => [9, 25] structuredClone(new Set...
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