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Yuan30

第 125 题：如何将 [{id: 1}, {id: 2, pId: 1}, ...] 的重复数组（有重复数据）转成树形结构的数组 [{id: 1, child: [{id: 2, pId: 1}]}, ...] （需要去重）

```javascript function handelFn(arr) { let obj = {} let tree = {} async function ff(i) { obj[arr[i].pId].child.push(arr[i]) } for (let i = 0; i < arr.length; i++) { arr[i].child =...

第 125 题：如何将 [{id: 1}, {id: 2, pId: 1}, ...] 的重复数组（有重复数据）转成树形结构的数组 [{id: 1, child: [{id: 2, pId: 1}]}, ...] （需要去重）

function handelFunc(srcData) { let childList = []; let result = []; for (let i = 0; i < srcData.length; i++) { let element = srcData[i]; element.child = childList[element.id] || (childList[element.id]...