摘要： 1 Chain of Responsibility Concepts 责任链基础 Chain of Responsibility is a kind of behaviour pattern for object. In the COR pattern, many objects which are referenced to next form a responsibility ... 阅读全文

摘要： 1 Mediator Pattern definition 调停者模式定义 The Mediator Pattern defines an object that encapsulates how a set of objects interact. This promotes loose coupling,keeping the objects from refering to ... 阅读全文

摘要： 1 Singleton Definition 单态模式定义 The main purpose is to gurantee that the instance of class has only one in the application. some operations, such as connecting to database, are userful for only... 阅读全文

摘要： 1.the intention of Bridge pattern 桥接模式的意图 Bridge pattern is to make interface separate with their respective concrete implementation. 桥接模式的意图是将抽象部分与他的实现部分相分离。 2.when to apply this pattern适用... 阅读全文

摘要： create proc Pr_ToSolver_ds_in_item_loc as if exists(select * from OFG_SLV_DEV3.dbo.ds_in_item_loc) delete from OFG_SLV_DEV3.dbo.ds_in_item_loc insert into OFG_SLV_DEV3.dbo.ds_in_item_loc ( ... 阅读全文

摘要： 1. What is DOM? DOM is an abbrieviattion for Document Object Model. DOM represent a page as a tree which consists of nodes. therefore , we can manipulate these nodes in order to modify and self-d... 阅读全文

摘要： 1.about B-Tree Although most of the search trees are binary trees, there is a popular serach tree taht is not binary. this tree is known as a B-tree. 虽然大多数的查找树是二叉树，但是也存在不是二叉树的查找树。这种树就是B-树。简言之，B树是一种多... 阅读全文

摘要： 传统的垃圾回收机制 1.引用计数(reference counting，RC)算法 1960年以前，人们为胚胎中的LISP语言设计垃圾回收机制时，第一个想到的算法就是引用计数算法。拿餐巾纸的例子来说 午餐时，为了把脑子里突然跳出来的设机灵感记下来，我从餐巾纸代中抽出一张餐巾纸，打算在上面画出系统构架的蓝图。按照“餐巾纸使用之引用计数版“的要求，画图之前，我必须事先在餐巾纸的一角写上... 阅读全文

摘要： Interface is a new great type in CLR. it's hard to represent just with words. we can describe the importance of interface using a sample as following shown. 在CLR中，interface 是一个非常重要的新的类型(C++中没有inte... 阅读全文

摘要： 1. the similar feature 相似性 grammar: public const int x=100; public readonly int x; const variable and readonly variable can not be modified once they are initialized in run-time. Ho... 阅读全文