r in nutshell

This is a creation in Article, where the information may have evolved or changed. Recent interest in go language has been strong. Because the go language can not only develop desktop, Web programs, the most attractive to me is the language of Android to go all the way to move closer to the trend, home system or use their own language development more reliable.In a nutshell: The Go language is the second open source programming language released by Goo

create a Mina application, you just need to do:Create I/O service-Select the service you have provided (acceptor) or the service you created yourselfCreate a filter chain-select the filter chain already provided or create your own custom filter chainCreate I/ohandler-write business logic, handle a variety of different messages above is the overall structure of Mina,Here's a look at the service-side structure: In a nutshell, there is an I/O acceptor

understand the structure of the GridView, see. In a nutshell, a GridView consists of n columns, and each column has its own header, content, and footer operations, which are reflected in the GridView code. try { echo gridview::widget ([ ' dataprovider ' = ' $dataProvider, ' columns ' =>[ ' id ', ' Created_at:datetime: Generate time ', [ ' label ' + ' member name ',

Today, we are going to talk about the content of abstract and abstract methods in object-oriented PHP, in a nutshell, the abstract class in PHP is a class that cannot be instantiated, can only be used as the parent class of other classes, and the abstract method cannot take the method body, so let's look at the concrete examples below. Object-oriented abstract methods and abstract classes: All subclasses must inherit the methods of the parent class,

that you can manipulate the local database with query statements like MySQL queries, you'll find it interesting. Today, let's look at the HTML 5 Web SQL Database api:opendatabase, transaction, ExecuteSQL. Installation steps in Windows environment Phpstudy tutorial Summary: Phpstudy is a program integration package for a PHP debugging environment. The package integrates the latest apache+php+mysql+phpmyadmin+zendoptimizer, one-time installation, no need to be configured to use, is a very conven

connection is relatively slow, you can see the difference. When your database connection is slow, the DB operation is not very complicated, and you have enough confidence in your own program, no deadlock, and you have control over the server, you can meet any of the above four conditions of any two, then use Pconnect.Pconnect does not have to be closed in the script, you can set lifetime in MySQL, or you can write the shell to scan regularly, kill off the long-dormant connection. In a

This time to bring you the PHP closure principle (OCP) Use case analysis, the PHP closure principle (OCP) to use the attention of what, the following is the actual case, together to see. 1. What is "open-closed" With the increasing of the scale of software system, the complexity of maintenance and modification of software system continues to improve, this predicament has prompted the French engineering academician Bertrand Meyer to put forward the principle of "open-closed" (Open-close PRINCIPL

an exception in a destructor (called when the script terminates) can result in a fatal error. Class x{function construct () { $this->file = fopen (' path ', ' a '),} function destruct () { fclose ($this->fil e); }} In a nutshell, the destructor is a special work to do when the object is closed, such as the example I wrote, which opens a file at the same time as the instantiation, but when it is closed, it is closed, so the destructor closes it dire

interfaces (interface) may contain only function definitions Abstract classes are concepts that are abstracted from a series of related objects, and thus reflect the internal commonality of things; an interface is a functional contract defined to satisfy an external invocation, so it reflects the external nature of the thing. Analyzing objects, refining internal commonalities to form abstract classes to represent the nature of objects, i.e. "what" The interface is preferred when the exter

This article refer to sikic# Advanced article, reproduced please indicate the source.What is a delegateIf we want to pass the method as a parameter, we need to use the delegate. In a nutshell, a delegate is a type that can assign a reference to a method . Declaring delegates and usingThere are four ways of declaring a delegate. One is native, and the other three is C # for the convenience of encapsulation.The four types of declarations are delegate,

Note: Most of this article draws on the "c#5.0 authoritative guide In the Nutshell", small part also wants to comb the C # According to this book well. Preamble: C # is a common type-safe, object-oriented programming language. The goal of this language is to increase the productivity of programmers, which requires a balance of simplicity, expression, and performance. The chief architect of the C # language, starting with the first version, was An

condition occurs, the action is added to the end of the execution queue, unless it is already in the queue.Each action in the queue is extracted sequentially, and each command in the action is executed sequentially.The actions are in the following form:On On is followed by a trigger, and when trigger is triggered, COMMAND1,COMMAND2,COMMAND3 executes sequentially until the next action or next service.In a nutshell, actions are a startup script that An

In a nutshell, the resources in Android refer to non-code parts, slices, MP3, strings, XML files, and so on.In an Android project, there are two folders alongside the SRC source folder, called Res and assets, which are used to save resource files.Different points:Resources in 1.res can be accessed directly through the R resource class. This method is more commonly used.The res contains various subfolders that categorize the resources:Anim (XML animati

, which is labeled "not For use by Third-party applications "permission.Once we understand the permission mechanism of Android, we can know:1. Android APK is equivalent to the UID of Linux.2. Android permission is the equivalent of a Linux gid.3. Android signature is used to control the UID and GID allocation of the APK.This is the relationship between Android permission-based security and the Linux Uid/gid-based security mechanism, which, in a nutshell