manual reference

1. Please describe the differences between Nsset, Nsarray and nsdictionary.Nsset, Nsarray, nsdictionary are all non-mutable collection classes, and only object elements can be added to the collection class to add basic data types.Immutable: The

MongoDB database introduction & installation configuration, mongodb DatabaseApsaradb for MongoDB is a distributed file storage-based open-source NoSQL database system written in C ++. It adds more nodes under high loads, this service guarantees

MongoDB database data aggregation & amp; Pipe operations, mongodb database AggregationThe data aggregation process for pipeline operations on mongodb usually works with pipeline operations. The pipeline operation concept of mongodb is similar to the

The main content of the previous article stresses the use of CC ++ to implement Node. js module, This article further explores this issue. If you need it, you can refer to the warm-up to learn about it. Remember this V8 online

Php references add symbols before variables, functions, and objects. in PHP, references mean that different names access the content of the same variable. The following describes how to use PHP references. Php references add symbols before variables,

Transferred from: http://www.cnblogs.com/flyFreeZn/p/4264220.htmlThis article comes from my personal arc learning note, which aims to summarize the key points of the Automatic Reference counting, automatic reference counting technology for iOS

The style is first seen in the exercise control today. Setting the style greatly improves the efficiency of writing the UI using XAML; In my previous studies, every time I write a control, I need to write a lot of attributes that match it. For

Rules of Component Object Model Charlie KindelProgram Administrator, Windows NTOctober 20, 1995 Summary This article aims to provide a quick reference for using and implementing the Microsoft Component Object Model (COM. If you want to better

Reply content:You are using the self-brought idle ... A wonderful editor = = In theory, this error is the Python VM crashes after the port is not released, you can use Command+space input terminal, and then Ps-ef | grep python looks like this to

Php variables, functions, and objects. The reference in PHP means that different names access the same variable content. the pointer is different from the pointer in C language. the pointer in C language stores the variable content referenced in the

Describes the function of referencing (& amp; symbol) in php. Php references (adding symbols before variables, functions, and objects) in PHP mean that different names access the same variable content. pointers in C language are different from php

PrefaceSince Microsoft announced the COM technology for the first time in 1993, the development model on the Windows platform has undergone great changes. A series of software componentization technologies based on COM have brought Windows

Original Title: iOS 6 programming pushing the limits Author: (US) ROB Napier mugunth Kumar [Translator's introduction] Translator: chen xiaoliang Wu Haifeng Deng Qiang Zhou Qingcheng series name: Turing Program Design Series Press: People's post and

Teach you how to get started with ARC-iOS/Mac development and use Revolution of Objective-c. some examples in this article are taken from the tutorials and public content about ARC in iOS 5 Toturail, it is only used for technical exchanges and

Protobuf and iosprotobuf for iOS Network Communication Abstract: objects must be serialized before communication between different platforms. On the iOS platform, we often use 'nskeyedarchiver 'for archiving. Of course, we can also process data in

Technical Points of ARC memory management for iOS developmentThis article comes from my personal ARC Study Notes and aims to summarize the key points of the Automatic Reference Counting (Automatic Reference Counting) Memory Management Technology in

Mongodb Study Notes 03. mongodb Study NotesMongodb Study Notes 03-query expression Not equal to, greater than, less ! =: Db. stu. find ({name: {$ ne: 'billvsme '}) name is not 'billvsme' >: Db. stu. find ({age: {$ gt: 18}) older than 18 >=: $

MongoDB3.0.x user authorization configuration (standalone environment) By default, the MongoDB database does not have permission control. It can be accessed by connecting to the opened port and has root-level permissions; the production environment

Mysql 5.6 and mysql5.6Limits in MySQL 5.6Sql Join restrictions:  Database and table quantity limit: The table size of a Mysql database is generally determined by the size limit of a single file in the operating system, not by the mysql kernel; File

IOS memory management and ios Memory Management The memory resources of the device are allocated and used when the software is running. Therefore, memory management is required during software development to ensure efficient and fast memory