扁平数组变为树结构

假设不考虑其他，只需要按照现有的数组索引把后续的元素绑定到前面一个元素的children属性数组中。

场景为：级联控件 。

输入 let children = [{value:12,key:12},{value:23,key:45}] 输出 let options = [ {value:12, key:12, children:[ {value:12, key:12, children:[{ value:12, key:12,

}]

} ] }]

代码如下 ：

  1.  transOption = (item, children, index) => {
  2.     const len = children.length;
  3.       let Newitem =  {
  4.         ...item
  5.         isLeaf: index === len - 1,
  6.       };
  7.     if (index + 1 === len) {
  8.       return Newitem
  9.     }
  10.        Newitem.children =
  11.     return {
  12.         ...Newitem,
  13.       children : [this.transOption(children[index + 1], children, index + 1)]
  14.     }
  15.  }