Extraction from C++ Primer 5th. Editioin 3.2.1 C++ has several different forms of initialization, we should understand how these forms differ from one aother. When we initialize a variable using =, we are asking the compiler to copy initialize the ob…

Lazy initialization (also sometimes called lazy instantiation, or lazy loading) is a technique for delaying the creation of an object or some other expensive process until it’s needed. When programming for iOS, this is helpful to make sure you utiliz…

A computer-implemented system and method for a lock-less, zero data copy messaging mechanism in a multi-core processor for use on a modem in a telecommunications network are described herein. The method includes, for each of a plurality of processing…

C++ Core Guidelines September 9, 2015 Editors: Bjarne Stroustrup Herb Sutter This document is a very early draft. It is inkorrekt, incompleat, and pµøoorly formatted. Had it been an open source (code) project, this would have been release 0.6. Copy…

档 ID 420787.1 White Paper Oracle Applications Multiple Organizations Access Control for Custom Code Checked for relevance on 12-JAN-2011 See Change Record This document discusses how to update the customization code that is affected by the access con…

这篇博客的源起是我下面的一段代码 #include <bits/stdc++.h> using namespace std; int main(){ priority_queue<long long> que; // some operations on que que = {}; // some operations on que return 0; } 其中 que = {} 相当于 que.clear();(std::priority_queue 并没有 clear() 方法…

摘自http://v3.bootcss.com/migration/ Bootstrap 3 版本并不向后兼容 v2.x 版本.下面的章节是一份从 v2.x 版本升级到 v3.0 版本的通用指南.如需查看更版本更新信息,请点击 v3.0 新增内容. 主要 class 的变更 下表列举了 v2.0x 版本和 v3.0 版本之间的样式差异. Bootstrap 2.x Bootstrap 3.0 .row-fluid .row .span* .col-md-* .offset* .col-md-of…

直接预测是B帧上一种独有的预测方式,其中直接预测又分为两种模式: 时域直接模式(temporal direct).空域直接模式(spatial direct). 在分析这两种模式之前,有一个前提概念需要了解:共同位置4x4子宏块分割块(co-located 4x4 sub-macroblock partitions),下面简称为co-located. 共同位置4x4子宏块分割块,故名思义,该块大小为4x4.co-located的主要功能是得到出该4x4块的运动向量以及参考帧,以供后面的直接预测做…

Matroska 开源多媒体容器标准.MKV属于其中的一部分.Matroska常见的有.MKV视频格式.MKA音频格式..MKS字幕格式..MK3D files (stereoscopic/3D video). 1.EBML(Extensible Binary Meta Language)   MKV是建立在EBML这种语言的基础上,所以要了解MKV格式需要先了解EBML这种语言. EBML是一种类似于XML格式的可扩展二进制元语言,使用可变长度的整数存储,以节省空间. EBML基本元素结构:…

本文转自:https://weblog.west-wind.com/posts/2016/Jun/06/Publishing-and-Running-ASPNET-Core-Applications-with-IIS#DoyouneedIIS? When you build ASP.NET Core applications and you plan on running your applications on IIS you'll find that the way that Core ap…

提高一个系统的performance,有两种办法: 1) 不断提高一个core的performance,手段就是不断提高freq,减小Vt,这样都会在增加power(dynamic,leakage) 2) 增加processor的个数 arm的big-little processor cluster采用的就是第二个办法,通过Power Gating和DVFS也尽量的减小了功耗. 但是multiprocessor的另一个问题就是cache coherence的问题. 针对cluster内部,arm…

[时间:2016-07] [状态:Open] MKV是一种开源的多媒体封装格式,是Matroska中应用比较多的格式之一.常见的后缀格式是.mkv(视频,包括音频和字幕)..mka(纯音频)..mks(纯字幕)..mk3d(3d视频,包括音频和字幕). 0. 学习多媒体容器格式的目的 主要是为了回答以下问题: 该容器中数据是如何组织的? 该容器包含哪些编码格式的数据?这些数据是如何存储的? 该容器包含哪些元数据信息?包含哪些节目信息? 对于支持多节目的容器格式,如何找到对应的音频流.视频流.字幕…

          HEC-ResSim Reservoir System Simulation             User's Manual       Version 3.1 May 2013     Approved for Public Release. Distribution Unlimited.     CPD-82 REPORT DOCUMENTATION PAGE Form Approved OMB No. 0704-0188 The public reporting b…

一．实验内容: 利用sift算法,实现全景拼接算法,将给定的两幅图片拼接为一幅. 二．实验环境: 主机配置: CPU :intel core i5-7300 2.50GHZ RAM :8.0GB 运行环境:win10 64位操作系统 开发环境:python3.7   三．核心算法原理: 1.SIFT算法 SIFT,即尺度不变特征变换(Scale-invariant feature transform,SIFT),是用于图像处理领域的一种描述.这种描述具有尺度不变性,可在图像中检测出关键点,是一种…

转自: http://en.cppreference.com/w/cpp/language/copy_initialization copy initialization   C++   C++ language   Initialization   Initializes an object from another object Syntax   T object = other ; (1)     f(other); (2)     return other; (3)     catch…

You can do Select, Cut, Copy and Paste operations on text items in Oracle Forms using Select_All, Cut_Region, Copy_Region and Paste_Region commands through right click popup menu.   In this example I created a popup menu which is associated with the…

Windows Forms Application Creation and Initialization This topic details the steps performed after an end-user has run an XAF Windows Forms application, until the moment the main XAF objects, like the WinApplication, are created and initialized. In t…

In this tutorial you will learn to copy the records from one data block to another data block on same form and on a same canvas in Oracle Forms. Below is the screen shot of the form and you can download this form for your reference from the following…

org.apache.solr.common.SolrException:org.apache.solr.common.SolrException: The max direct memory is likely too low. Either increase it (by adding -XX:MaxDirectMemorySize=g -XX:+UseLargePages to your containers startup args) or disable direct allocati…

  原文  http://resources.infosecinstitute.com/system-address-map-initialization-x86x64-architecture-part-2-pci-express-based-systems/   This article is the second part of a series that clarifies PCI expansion ROM address mapping to the system address m…

一.model字段对象 (一)_meta _meta是django.db.models.options.Options的实例,获取字段对象可通过模型类来进行获取,而_meta可提供如下功能: 获取模型的所有字段实例 通过名称获取模型的单个字段实例 1.获取模型的单个字段实例 In [19]: models.Book._meta.get_field("title") Out[19]: <django.db.models.fields.CharField: title> 2.获…

本文由@呆代待殆原创,转载请注明出处. 对于一个类来说,我们把copy constructor.copy-assignment operator.move constructor.move-assignment operator.destructor统称为copy control. 今天我们先来聊聊其中的copy constructor.copy-assignment operator的destructor这三个. copy constructor copy constructor:一个cons…

Copy, Assign, and Destroy When we define a class, we specify what happens when objects of the class are copied, moved, assigned, and destroyed. A class controls these operations by defining five special member functions: copy contructor, copy-assignm…

BACKGROUND The present disclosure relates to the resource management of virtual machine(s) using hardware address mapping, and, more specifically, to facilitate direct access to devices from virtual machines, utilizing control of hardware address tra…

Copy elision (or Copy omission) is a compiler optimization technique that avoids unnecessary copying of objects. Now a days, almost every compiler uses it. Let us understand it with the help of an example. 1 #include <iostream> 2 using namespace std…

vs2015 update3 新建的xamarin.forms项目中的android项目编译错误.提示缺少android_m2repository_r22.zip,96659D653BDE0FAEDB818170891F2BB0.zip等类似错误. Error Download failed. Please download https://dl-ssl.google.com/android/repository/android_m2repository_r22.zip and put it t…

看完此文,题目不言自明.转自 http://blog.chinaunix.net/uid-27105712-id-3270102.html 在Linux 开发中,有几个关系到性能的东西,技术人员非常关注:进程,CPU,MEM,网络IO,磁盘IO.本篇文件打算详细全面,深入浅出.剖析文件IO的细节.从多个角度探索如何提高IO性能.本文尽量用通俗易懂的视角去阐述.不copy内核代码. 阐述之前,要先有个大视角,让我们站在万米高空,鸟瞰我们的文件IO,它们设计是分层的,分层有2个好处,一是架构清晰,二…

Engish version copied from here Why This Document? As editor of the Jargon File and author of a few other well-known documents of similar nature, I often get email requests from enthusiastic network newbies asking (in effect) "how can I learn to be a…

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…

Method overloading |_Distinguishing overloaded methods If the methods hava the same name, how can Java know which method you mean? There's a simple rule : Each overloaded method must take a unique list of argument types. |_Overloading with primitives…