高校餐饮一卡通系统源码 if exists (select * from dbo.sysobjects where id = object_id(N'[dbo].[card]') and OBJECTPROPERTY(id, N'IsUserTable') = 1) drop table [dbo].[card] GO if exists (select * from dbo.sysobjects where id = object_id(N'[dbo].[card_use]') and OB
UPX 源码 V3 验证好用 UPX.v3.05.Source The UPX Hacker's Guide ====================== Foreword -------- The precompiled UPX versions are linked against the NRV compression library instead of the UCL library. Using the same compression algorithms, NRV achiev
React作为一门前端框架,虽然只是focus在MVVM中的View部分,但还是实现了View和model的绑定。修改数据的同时,可以实现View的刷新。这大大简化了我们的逻辑,只用关心数据流的变化,同时减少了代码量,使得后期维护也更加方便。这个特性则要归功于setState()方法。React中利用队列机制来管理state,避免了很多重复的View刷新。下面我们来从源码角度探寻下setState机制。
1 还是先声明一个组件,从最开始一步步来寻源;
class App extends Com
C语言 MD5源码
md5c.h:
/* POINTER defines a generic pointer type */
typedef unsigned char * POINTER;
/* UINT2 defines a two byte word */
//typedef unsigned short int UINT2;
/* UINT4 defines a four byte word */
typedef unsigned long int UINT4;
/* MD5