mcv foundation

, because the No. 0 object in array was immediately destroyed after it was removed, so obj pointed to a dealloced object, so NSLog will appear exc_bad_access. In arc, because obj is strong, it holds the first object in the array, and the array is no longer the only holder of that object. Even if we remove obj from the array, it will not be destroyed because it has been held by another pointer;(8), ARC also has some shortcomings, for beginners, may only use arc on the Objective-c object (also inh

Information Security System Design Foundation Fifth Week study summary"Learning Time: 10 hours""Learning content: Chapter III: Machine Representation of the program"First, the contents of the textbook 1. Changes in X86 addressing modes:1 The flat mode of the DOS era, does not distinguish between user space and kernel space, very insecure;2 8086 sub-mode;3 IA32 Flat mode with protected mode2. Two kinds of abstraction of machine programming:1) instructi

foundation, followed by the details of the deep, and further understand the essence of C + +. "effective C + +" can be seen as a C + + troubleshooting manual; for the C + + language level in-depth things, error-prone knowledge points, in this book can find a satisfactory answer, suitable for multiple tastes. "c + + must know will" "more effective C + +" as to effective C + + did not finish the supplement, can be regarded as the former after reading t

Key Core:Version.h: Version control information, macro poco_version, value format with 0xAABBCCDD, respectively, representing the main version, minor version, patch version, pre-release version;Poco.h: simply contains the header file Foundation.h;Foundation.h: The header files that need to be included before using any other Foundation module, mainly define the library export macro Poco_dll, Foundation_api, and automatically connect the appropriate con

Many users in the process of using TFS complain about a problem and cannot find files in the code base of TFS! Although all of TFS's data is stored in the database (SQL Server), you cannot query the database directly through the functionality of the full-text search because of the particularity of the code file store. The latest version of TFS Update 4 and TFS Online is not able to find code-related search functionality on the interface. However, through the research, discover the TFS code base

Windows Communication Foundation (WCF) (formerly known as "Indigo") will fundamentally change the distributed programming interface for developers using Microsoft. NET Framework. The entire set of existing. net distributed technology is integrated into a programming model, which improves your experience through stable structure, greatly improved functionality and interoperability, and all the scalability you want. This article will introduce you to WC

After you have installed SharePoint Foundation with SP1 directly, you find that the new site does not have a default search box.650) this.width=650; "src=" http://s3.51cto.com/wyfs02/M02/79/DD/wKioL1ac-2DxDgazAAHSRSHwYQQ964.jpg "title=" 5.jpg " alt= "Wkiol1ac-2dxdgazaahsrshwyqq964.jpg"/>Specific error characteristics:1. Add search Box Web Part, save page Error "Common language runtime detects invalid program"650) this.width=650; "src=" http://s4.51cto

The foundation kit is the base Class library for OS X class Library and iOS class library sharing, which provides a lot of encapsulation classes, see https://developer.apple.com/library/ios/documentation/Cocoa/ reference/foundation/objc_classic/, here are some common classes.1. String class: NSString and Nsmutablestring.Nsmutablestring inherit from NSString, the difference is: Nsmutablestring is mutable, an

Do not write, I fear will never write the-lamp Foundation, nor-lamp Foundation Hi After 4 days of baptism of the feast, the whole people think of the secret Tatsu ... Yesterday's lazy, there is no reason for lazy, in short, is the pen to the pro 1. Lamp Configuration under Ubuntu Basic knowledge of-----ubuntu----- ----Administrator Privileges For security reasons, Ubuntu does not recommend using the root a

We all know that an important part of a building is the foundation, if not a solid foundation. Again gorgeous appearance and decoration are no longer there. We build Web-tagged pages, and most people are more concerned with CSS technology and its applications. But we also need to understand that CSS, however powerful, also works on XHTML. Without a well-formed XHTML base, our layout will be more difficult t