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Grand Central Dispatch (GCD) is a technology developed by Apple Inc. to optimize application support for systems with multi-core processors and other 阅读全文
posted @ 2018-01-18 23:51
zzfx
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POSIX Threads, usually referred to as pthreads, is an execution model that exists independently from a language, as well as a parallel execution model 阅读全文
posted @ 2018-01-18 23:49
zzfx
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In computer programming, event-driven programming is a programming paradigm in which the flow of the program is determined by events such as user acti 阅读全文
posted @ 2018-01-18 23:47
zzfx
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操作方式、含义、存储方式。 In computer science and computer programming, a data type or simply type is a classification of data which tells the compiler or interpr 阅读全文
posted @ 2018-01-18 21:58
zzfx
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以前本站发布过《编程语言时间地理图》、《计算机编程简史图》，下面是两张关于编程语言的进化图。 第一张是比较宏观的，来源在这里，虽然是去年的，但还是比较不错的，其把计算机编程语言分成了五个时代—— 语言诞生。1940年代。第一个语言应该是：Ada Lovelace, 编译器时代。1950年代。这个时代 阅读全文
posted @ 2018-01-18 17:04
zzfx
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Type system[edit] Main articles: Data type, Type system, and Type safety A type system defines how a programming language classifies values and expres 阅读全文
posted @ 2018-01-18 15:54
zzfx
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In computer programming, run-time type information or run-time type identification (RTTI)[1] refers to a C++ mechanism that exposes information about 阅读全文
posted @ 2018-01-18 15:46
zzfx
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类型系统的属性： 1、结构属性； 2、规则属性；类型系统定义了一套规则（内部数据的访问规则、函数的访问规则、类型的比较与转化规则），以供编译和运行时进行检查。 In programming languages, a type system is a set of rules that assigns 阅读全文
posted @ 2018-01-18 15:38
zzfx
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动态改变运行时结构 Dynamic programming language, in computer science, is a class of high-level programming languages which, at runtime, execute many common pro 阅读全文
posted @ 2018-01-18 15:12
zzfx
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动态语言：修改结构； 动态类型：运行时类型检查； 编译语言：机器码、解释器； 强类型：类型不可变。 编译型语言和解释型语言 1、编译型语言 需通过编译器（compiler）将源代码编译成机器码，之后才能执行的语言。一般需经过编译（compile）、链接（linker）这两个步骤。编译是把源代码编译成 阅读全文
posted @ 2018-01-18 15:06
zzfx
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this 和 self指针 为函数提供了运行上下问；为函数提供了当前对象的其实地址，方便函数的对对象的访问。 阅读全文
posted @ 2018-01-18 12:49
zzfx
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Normally, in a typed language, the dispatch mechanism will be performed based on the type of the arguments (most commonly based on the type of the rec 阅读全文
posted @ 2018-01-18 12:40
zzfx
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Late binding, or dynamic binding,[1] is a computer programming mechanism in which the method being called upon an object or the function being called 阅读全文
posted @ 2018-01-18 12:38
zzfx
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