1 Simple BLOCK The simple block represents only a way of partitioning the code. It allows concurrent statements to be clustered into a BLOCK, with the purpose of turning a set of concurrent statements to be more readable and more manageable. label: B…

GENERATE It is another concurrent statement (along with operators and WHEN). It is equivalent to the sequential statement LOOP in the sense that it allows a section of code to be repeated a number of times, thus creating several instances of the same…

WHEN (simple and selected) It is one of the fundamental concurrent statements (along with operators and GENERATE). It appears in two forms: WHEN / ELSE (simple WHEN) and WITH / SELECT / WHEN (selected WHEN). 1) WHEN / ELSE: assignment WHEN condition…

Using operators Operators can be used to implement any combinational circuit. However, as will become apparent later, complex circuits are usually easier to write using sequential code, even if the circuit does not contain sequential logic. Example M…

(function(){ if ( !this.Data || (typeof this.Data != 'object' && typeof this.Data != 'function') ) this.Data = new Object(); if ( this.Data.Stack === undefined ) this.Data.Stack = undefined; with ( function(){ with ( Data ) { return function () {…

一.简介 GCD 的全称是 Grand Centre Dispatch 是一个强大的任务编程管理工具.通过GCD你可以同步或者异步地执行block.function. 二.dispatch Queue - 队列 queue是指先进先出的列表,是blocks的执行环境.这个环境可以是单线程的也可以使多线程这个取决于你创建的queue类型.如果是serial queue(串行队列)队列的话,queue内部是以单线程运行.被添加进去的blocks,按照它们被添加进去的顺序串行地执行. 如果是concu…

Cocoa编程的一个通常的任务是要去循环遍历一个对象的集合  (例如,一个 NSArray, NSSet 或者是 NSDictionary). 这个看似简单的问题有广泛数量的解决方案,它们中的许多不乏有对性能方面问题的细微考虑. 对于速度的追求 首先,是一个免责声明: 相比其它问题而言,一个 Objective-C 方法原始的速度是你在编程时最后才需要考虑的问题之一 – 区别就在于这个问题够不上去同其它更加需要重点考虑的问题进行比较,比如说代码的清晰度和可读性. 但速度的次要性并不妨碍我们去理解…

Cocoa编程的一个通常的任务是要去循环遍历一个对象的集合  (例如,一个 NSArray, NSSet 或者是 NSDictionary). 这个看似简单的问题有广泛数量的解决方案,它们中的许多不乏有对性能方面问题的细微考虑. 对于速度的追求 首先,是一个免责声明: 相比其它问题而言,一个 Objective-C 方法原始的速度是你在编程时最后才需要考虑的问题之一 – 区别就在于这个问题够不上去同其它更加需要重点考虑的问题进行比较,比如说代码的清晰度和可读性. 但速度的次要性并不妨碍我们去理解…

http://blog.csdn.net/win_lin/article/details/8242653 译文在后面. State Threads for Internet Applications Introduction State Threads is an application library which provides a foundation for writing fast and highly scalable Internet Applications on UNIX-li…

A delta cycle is a VHDL construct used to makeVHDL, a concurrent language, executable on asequential computer. For RTL design, you can adopt some simple rules andforget about delta cycles. For testbenches, often you must have a good understandingof w…