上节我们讨论了Zipper-串形不可变集合(immutable sequential collection)游标,在串形集合中左右游走及元素维护操作.这篇我们谈谈Tree.在电子商务应用中对于xml,json等格式文件的处理要求非常之普遍,scalaz提供了Tree数据类型及相关的游览及操作函数能更方便高效的处理xml,json文件及系统目录这些树形结构数据的相关编程.scalaz Tree的定义非常简单:scalaz/Tree.scala * A multi-way tree, also kn…
C#生成树形结构泛型类,使用方法: ToTree<ShowMessageUpdatesTableTreeViewModel>.ToDo(models) public class ToTree<T> where T : IToTreeModel { public static List<T> ToDo(List<T> models) { var dtoMap = new Dictionary<int, T>(); foreach (var item…
This is a Laravel 4-5 package for working with trees in relational databases. Laravel 5.5, 5.6, 5.7, 5.8 is supported since v4.3 Laravel 5.2, 5.3, 5.4 is supported since v4 Laravel 5.1 is supported in v3 Laravel 4 is supported in v2 Although this pro…
var data = [ {id:100000, name :"1", pid :0}, {id:100100, name :"1-1", pid :100000, }, {id:100101, name :"1-1-1", pid :100100, }, {id:200000, name :"2", pid :0, }, {id:210000, name :"2-1", pid :200000, }, {…