https://www.hackcraft.net/raii/ https://en.wikipedia.org/wiki/Resource_Acquisition_Is_Initialization…

A functional programming function is like a mathematical function, which produces an output that typically depends only on its arguments. Each time a functional programming function is called with the same arguments, the same result is achieved. Func…

原文链接:http://en.wikibooks.org/wiki/More_C%2B%2B_Idioms/Resource_Acquisition_Is_Initialization Intent To guarantee release of resource(s) at the end of a scope To provide basic exception safety guarantee Also Known As Execute-Around Object Resource Rel…

n computer science, reflection is the ability of a computer program to examine, introspect, and modify its own structure and behavior at runtime.[1] A language supporting reflection provides a number of features available at runtime that would otherw…

w https://zh.wikipedia.org/wiki/RAII RAII要求,资源的有效期与持有资源的对象的生命期严格绑定,即由对象的构造函数完成资源的分配(获取),同时由析构函数完成资源的释放.在这种要求下,只要对象能正确地析构,就不会出现资源泄露问题. https://en.wikipedia.org/wiki/Resource_acquisition_is_initialization Resource acquisition is initialization (RAII)[1…

Parent interface of Collection: Iterable Interface A class that implements the Iterable can be used with the new for-loop. The Iterable interface has only one method: public interface Iterable<T> { public Iterator<T> iterator(); } It is possib…

C++11标准推出了很多有用的新特性,本文特别关注那些相比C++98更像是一门新语言的特性,理由是: 这些特性改变了编写C++程序使用的代码风格和习语[译注 1],通常也包括你设计C++函数库的方式.例如,你会看到更多参数和返回值类型为智能指针(smart pointer),同时也会看到函数通过值传递返回大型对象.你将会发现在大多数的代码示例中充斥着新特性的身影.例如,几乎每5行现代C++代码示例都会使用到auto. C++11的其他特性也很棒.但是请先熟悉下面这些,正是由于这些特性的广泛使用使…

在上一篇文章中介绍了C++11新引入的lambda表达式(C++支持闭包的实现),现在我们看一下lambda的出现对于我们编程习惯的影响,毕竟,C++11历经10年磨砺,出140新feature,对于我们的programming idiom有深远影响.我们先看一下是不是lambda的出现对于仿函数的影响. 1) 仿函数 wikipedia 的定义: A function object, also called a functor, functional, or functionoid, is a…

java设计模式大全 Design pattern samples in Java(最经典最全的资料) 2015年06月19日 13:10:58 阅读数:11100 Design pattern samples in Java. Build status: Introduction Design patterns are formalized best practices that the programmer can use to solve common problems when desi…

网址 http://docs.python-guide.org/en/latest/ Reuqests库的作者写的经验 1. 项目需要一个好的结构 https://www.kennethreitz.org/essays/repository-structure-and-python https://github.com/kennethreitz/samplemod 2. 组织糟糕的项目的一些标志(Some signs of a poorly structured project include)…

[说明]这篇文章本来发布在我个人网站的博客上,但由于:1,打算以cnblogs为家了:2. 关于智能指针部分需要修订,所有将修订版发在这里,作为第一篇文章. 常遇到的动态内存回收问题 在C++的编程过程中,我们经常需要申请一块动态内存,然后当用完以后将其释放.通常而言,我们的代码是这样的: 1: void func() 2: { 3: //allocate a dynamic memory 4: int *ptr = new int; 5:  6: //use ptr 7:  8: //rele…

RAII:(Resource Acquisition Is Initialization),也就是“资源获取就是初始化”,是C++语言的一种管理资源.避免泄漏的惯用法.C++标准保证任何情况下,已构造的对象最终会销毁,即它的析构函数最终会被调用.简单的说,RAII 的做法是使用一个对象,在其构造时获取资源,在对象生命期控制对资源的访问使之始终保持有效,最后在对象析构的时候释放资源. RAII分类: 根据RAII对资源的所有权可分为常性类型和变性类型,代表者分别是boost:shared_ptr<…

在C++的编程过程中,我们经常需要申请一块动态内存,然后当用完以后将其释放.通常而言,我们的代码是这样的: 1: void func() 2: { 3: //allocate a dynamic memory 4: int *ptr = new int; 5: 6: //use ptr 7: 8: //release allocated memory 9: delete ptr; 10: ptr = NULL; 11: } 如果这个函数func()逻辑比较简单,问题不大,但是当中间的代码有可能抛…

http://julialang.org/ julia | source | downloads | docs | blog | community | teaching | publications | gsoc | juliacon | rss Julia is a high-level, high-performance dynamic programming language for technical computing, with syntax that is familiar to…

Resource Acquisition Is Initialization or RAII, is a C++ programming technique which binds the life cycle of a resource (allocated memory, thread of execution, open socket, open file, locked mutex, database connection-anything that exists in limited…

Hex Dump In Many Programming Languages See also: ArraySumInManyProgrammingLanguages, CounterInManyProgrammingLanguages, DotProductInManyProgrammingLanguages, WardNumberInManyProgrammingLanguages, NinetyNineBottlesOfBeerOnTheWall, ProgrammingChrestoma…

在读<Effective C++>和项目源代码时,看到pImpl Idiom.它可以用来降低文件间的编译依赖关系,通过把一个Class分成两个Class,一个只提供接口,另一个负责实现该接口,实现接口与实现的分离.这个分离的关键在于“以声明的依赖性”替换“定义的依赖性”,而编译依赖性最小化的本质是:让头文件尽可能的自我满足,万一做不到,则让它与其他文件内的声明式(而非定义式)相依. 引用这里的一些描述:The Pimpl idiom, also known as the compilation…

This appendix contains suggestions to help guide you in performing low-level program design and in writing code.Naturally, these are guidelines and not rules. The idea is to use them as inspirations and to remember that there are occasional situation…

1. Threading is the creation and management of multiple units of execution within a single process 二进制文件是驻留在存储介质上,已被编译成操作系统可以使用,准备执行但没有正运行的休眠程序 进程是操作系统对 正在执行中的二进制文件的抽象:已加载的二进制.虚拟内存.内核资源 线程是进程内的执行单元 processes are running binaries, threads are the smal…

Looping on the Command Line Writing for, while loops is useful when programming but not particularly easy when working interactively on the command line. There are some functions which implement looping to make life easier lapply: Loop over a list an…

RAII惯用法:C++资源管理的利器 RAII是指C++语言中的一个惯用法(idiom),它是“Resource Acquisition Is Initialization”的首字母缩写.中文可将其翻译为“资源获取就是初始化”.虽然从某种程度上说这个名称并没有体现出该惯性法的本质精神,但是作为标准C++资源管理的关键技术,RAII早已在C++社群中深入人心. 我记得第一次学到RAII惯用法是在Bjarne Stroustrup的<C++程序设计语言(第3版)>一书中.当讲述C++资源管理时,B…

本文整理了Arthur O'Dwyer在CppCon 2019上关于RAII的演讲,演讲的slides可以在此链接进行下载. 在C++程序中,我们往往需要管理各种各样的资源.资源通常包括以下几种: Allocated memory (malloc/free, new/delete, new[]/delete[]) POSIX file handles (open/close) C File handles (fopen/fcolse) Mutex locks (pthread_mutex_loc…

本文整理了Arthur O'Dwyer在CppCon 2019上关于RAII的演讲,演讲的slides可以在此链接进行下载. 在C++程序中,我们往往需要管理各种各样的资源.资源通常包括以下几种: Allocated memory (malloc/free, new/delete, new[]/delete[]) POSIX file handles (open/close) C File handles (fopen/fcolse) Mutex locks (pthread_mutex_loc…

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    Programming Contest Problem Types Hal Burch conducted an analysis over spring break of 1999 and made an amazing discovery: there are only 16 types of programming contest problems! Furthermore, the top several comprise almost 80% of the problems s…

There are some Common Bugs in C Programming. Most of the contents are directly from or modified from Prof. Liu Pangfeng's blog. Most credits should go to him. For all the following problems, answer the output message of the code, unless they are spec…

Today when taking a bath I got a good idea that it is an efficient and interesting way to learn a new programming language: (These days I learn Python from the Python manual and feel a little bored....) Learn programming by trying some little or larg…

March 26, 2013 作者:Hawstein 出处:http://hawstein.com/posts/dp-novice-to-advanced.html 声明:本文采用以下协议进行授权: 自由转载-非商用-非衍生-保持署名|Creative Commons BY-NC-ND 3.0 ,转载请注明作者及出处. 前言 本文翻译自TopCoder上的一篇文章: Dynamic Programming: From novice to advanced ,并非严格逐字逐句翻译,其中加入了自己的…

从 wechall.net 到 net-force.nl 网站,发现网站的内容不错,里面也有不同类型的挑战题目:Javascript / Java Applets / Cryptography / Exploits / Cracking / Programming / Internet / Steganography,有的还有一定的难度.注册了帐号做题,我也从中学到了不少知识.对网络攻防有兴趣的同学可以尝试下. level 601: Keep walking... /* This is a ch…

1. Functional programming treats computation as the evaluation of mathematical and avoids state and mutable data. Scala encourages an expression-oriented programming(EOP) 1) In expression-oriented programming every statement is an expression. A state…