auto reflections

This series of articles by the @yhl_leo produced, reproduced please indicate the source. Article Link: http://blog.csdn.net/yhl_leo/article/details/50864612 When programming, it is often necessary to assign the value of an expression to a variable, which requires a clear understanding of the type of the expression when declaring the variable. But it is not so easy to do, and sometimes it is impossible. To solve this problem, the C++11 standard introduces a

I am a newbie. I have been confused for a long time. Today I decided to ask you the correct or common practices. Here is a simple example: id, title, content ,...... Label table: id. The two tables above the title obviously require auto-incrementing IDS as the primary key to ensure uniqueness. Design 1 next... I am a newbie. I am confused about this question for a long time. Today I decided to ask you the correct or common practices. A simple example

The following is a simple implementation of Python + MongoDB auto-incrementing key values. I think this is quite good. now I will share it with you and give you a reference. Let's take a look at it with Xiaobian. Background I recently wrote a test toolbox with a bug record system. I encountered a problem because I used Django and MongoDB in the background, how to implement an auto-increment field. It is v

1. Reference Links: A. http://www.cnblogs.com/karotte/archive/2012/06/06/2537670.html B. http://www.emacswiki.org/CollectionOfEmacsDevelopmentEnvironmentTools C. http://guweigang.com/2010/09/gnu/%E4%BB%8A%E5%A4%A9%E5%9F%BA%E6%9C%AC%E9%85%8D%E5%A5%BD%E4%BA%86emacs%E4%BA%86%EF%BC%81.html D. http://jovesky.sinaapp.com/2012/07/29/the-the-emacs24-configuration-cedet-and-ecb/ E. http://jianghao19890829.iteye.com/blog/1850791 F. http://blog.csdn.net/cnsword/article/details/7474119 G. http://jianghao198

It's not easy for programmers to remember the names of a lot of class names or class methods. If you want the IDE to be able to automatically complete the code, that will be a great help to our programmers.The Code hints feature in the Eclipse code is turned off by default, only the input "." When the feature is prompted with VS users may not be accustomed to this, VS is the input of any letter will prompt, the following is how to modify the Eclipse configuration, turn on the code automatic prom

The C++14 standard has recently been passed, as before, without much change to the language, and the C++14 standard is to make it easier for programmers to program by improving C++11, c++11 introduce the Auto keyword (strictly speaking, auto starts with C + + 03, just C + + 11 changed the meaning of auto), Auto makes y

One, auto1, the role of autoin general, when assigning the return value of an expression or function to an object, we must know the return type of the expression, but sometimes it is difficult or impossible to know the expression or the return type of the function. This time, We can use the Auto keyword to let the compiler help us parse the expression or the type the function belongs to. Like what:Auto item = val1 + Val2;

Zencart auto Facebook plug-in configuration and use Facebook allows users to implement virtual communication at no cost. Do you know the marketing results of Facebook? Another benefit of Facebook web pages is that they help you increase your search engine rankings. Zencart is an open sourceProgramA wide range of senior programmers develop zencart plug-ins, which further promotes the development of the zencart program. So far, many good zencart plug-i

There are two new methods of c++11, Auto and Decltype, which make our variable definitions much more convenient.The Auto keyword is deduced according to the type of its initialization.(1) Ignoring the Const property of the initializer itself when torn down. Such as:int x=0; Auto a=x,b=0; CoutOutput:I i (I represent int type)(2) If it is a pointer or reference, r

OneautoKeywords in previous livesStarting with the C language, the auto keyword is treated as a storage type modifier for a variable that represents an automatic variable (local variable). It cannot be used alone, or the compiler will give a warning. #include int main () {int a = 123 Span class= "K" >auto int b = 234 Span class= "K" >auto c = 345printf (\n" Span

Swift language auto layout Getting Started Tutorial: PreviousStart thinking in the form of automatic layout constraints!Update record: This tutorial was updated by Brad Johnson for Swift and iOS 8, with the first version of the author being the Matthijs Hollemans of the tutorial compilation group.Have you ever been bothered by the app's ability to display a neat interface in both portrait and landscape mode? Have you ever been upset about the layout s

adding videos on the Web page often does not automatically play, how to achieve automatic playback of video This is a lot of friends want to solvethe problem. After collecting and researching, we find several ways to realize the automatic play of video, for reference, learning,use! common code that videos are added to a Web page:keurls= "false" quality= "High" allowscriptaccess= "Never" allownetworking= "internal "allowscriptaccess=" never ">One, 56 albums video automatic playback method:Find th

Precautions for using the AUTO_INCREMENT column in MySQL: update auto-incrementing Column1. Description (1) For the MyISAM table, if you use UPDATE to UPDATE the auto-incrementing column, if the column value is the same as the existing value, an error occurs. If the column value is greater than the existing maximum value, the AUTO_INCREMENT of the table is automatically updated, and the operation is safe. (

: This article mainly introduces anatomy of Nginx automatic scripts (1) parsing configuration option script autooptions. For more information about PHP tutorials, see. Anatomy of Nginx automatic scripts (1) parsing configuration option script auto/options Author: Poechant Blog: blog.CSDN.net/Poechant Email: zhongchao. ustc # gmail.com (#-> @) Date: March 4th, 2012 Copyright? Liu Da-Poechant Install NginxBefore (that is, running makeBef

From: http://blog.chinaunix.net/space.php? Uid = 13626447 Do = Blog cuid = 392987 Usage: Create Table Test(Id int unsigned not null primary key auto_increment,Username varchar (15) not null)Auto_increment = 100; In database applications, we often use unique numbers to identify records. In MySQL, The auto_increment attribute of the data column can be automatically generated. MySQL supports multiple data tables, and the auto-increment attribu

Margin: 0 auto and text-align: Difference Between center (reprinted), margintext-align From: http://www.cnblogs.com/zhwl/p/3529473.html Basic concepts: 1. text-align: attribute specifies the horizontal alignment of text in the element; This attribute sets the horizontal alignment of text in block-level elements by specifying the point to which the row box is aligned; This attribute is generally used when text alignment is set. Value justify is support

This article mainly introduces the dynamic setting auto-completion and auto-verification function of ThinkPHP3.1, the need of friends can refer to the following Prior to the ThinkPHP3.1 version, if you need to set up automatic validation or auto-completion, you must either define it in the model or set the properties dynamically through the SetProperty method,

auto-increment will generate a unique number when the new record is inserted into the table. AUTO INCREMENT FieldWe typically want to automatically create a value for the primary key field each time a new record is inserted.We can create a auto-increment field in the table.Syntax for MySQLThe following SQL statement defines the "p_id" column in the "Persons" tabl

How to turn off and on auto sync and background data on androidadmin On Jun 23,201 1- 1 comment In this article we will give you a tutorial how to turn off auto sync on Android or Google phone. But before that, we will explain to you about auto sync and background data on Android. Understanding background data android If the Android Application running in the bac

The environment discussed below is based on Visual Studio 2010.In the process of using OPENCV, we not only specify the header file and library directory, but also specify the name of the library, for example, in order to use common basic functions, we need to specify additional Libopencv_highgui249.dll.In contrast, in the process of using the C + + Boost Library, we only need to specify the directory and library directory of the header file, and we do not have to specify additional dependencies