Original article: http://blog.csdn.net/skywalkzf/article/details/5185442
Kernel Mode and user mode are two operating levels of the operating system, Intel CPU provides three levels of Ring0-Ring3 run mode. Ring0 is the highest, and ring3 is the
Recently I learned the state mode. Now I will summarize the relevant knowledge points to facilitate future study:
The object state affects the behavior of the object: The object has different states and often produces different behaviors.
I.
Object copy
AnObject copyIs an action in computing where a data object has its attributes copied to another object of the same data type. an object is a composite data type in object-oriented programming languages. the copying of data is one of the
After compiling the hello World program, you can't help but use V8 and V8 JavaScript Engine as a powerful JavaScript parsing engine. What functions can it provide for us?Let's take a closer look at the hello World Program:
... // Create a string
Kernel Mode and user mode are two operating levels of the operating system, Intel CPU provides three levels of Ring0-Ring3 run mode. Ring0 is the highest, and ring3 is the lowest. Among them, the privileged level 0 (ring0) is reserved for the
The image taken by the camera contains EXIF information. The imageorientation attribute of uiimage refers to the orientation information in EXIF.If we ignore the orientation information and directly perform pixel processing or drawinrect operations
You can create and edit a preferences in an application and read it from another application. Of course, the premise is thatPreferencesThe permission must be at least context. mode_world_readable.For example. in teleca application A, the name is com.
24.2 policy mode Overview
In policy mode, we can define some independent classes to encapsulate different algorithms,Each class encapsulates a specific AlgorithmEvery class that encapsulates an algorithm can be calledStrategy)To ensure consistency
What is 1.jetty?Jetty is a lightweight Web server, similar to Tomcat, but more flexible than Tomcat, especially for inline use. The so-called inline type starts jetty in the form of Java statements so that we can achieve the same effect without
This article mainly introduces the scope and context of Javascript. this article describes the scope VS context, variable scope, "this" context, execution context (ExecutionContext), and scope chain, for more information, see
Overview
The
Recently in the study of object-oriented process of deep feelings, so organized a number of mind mapping to deepen understanding.1. Object Oriented thinking2. Object-Oriented Architecture3. Object-oriented processesSome points of knowledge:The
Recently do the project some busy, busy schedule teacher let me to the new students to talk about the interface Design knowledge O (╯-╰) O (because they will be small to get some ps poke me), this embarrassed to say what good? Occasionally saw Liu
In reality, many devices need to calculate other values based on some values, such as the area of the known radius of the garden, the perimeter of the known triangle on the three sides, and so on. There are also some technical equipment that will
State mode (behavior type)
Function
The status mode can be viewed as a dynamic version of the Policy mode. When the object state changes, its behavior is changed to another group of operations. By switching the subclass of an object in a system, you
Definition of gof: defines a language, a representation of its syntax, and defines an interpreter which uses this representation to explain sentences in the language.This mode is rarely used. I have seen the implementation of a robot instruction and
1. Introduction
Being able to dynamically execute C # code is a cool feature. For example, we can enter a line of C # code in the console, and then the program automatically compiles and executes this line of code, display the result to us. This is
Window size acquisition:
CGRect screenBounds = [[UIScreenmainScreen] bounds]; // A Rect with the status bar is returned.
CGRect rect = [[UIScreenmainScreen] applicationFrame]; // Rect that does not contain the status bar
UIImageView:
I. rounded
Evolution of delegated writing yuanl [reprinting and learning]. NET 1. x delegate writing
Delegate, if you do not investigate the details, on the surface, we can consider it as a safe "function pointer ". Of course, this function pointer is actually
The content source of this page is from Internet, which doesn't represent Alibaba Cloud's opinion;
products and services mentioned on that page don't have any relationship with Alibaba Cloud. If the
content of the page makes you feel confusing, please write us an email, we will handle the problem
within 5 days after receiving your email.
If you find any instances of plagiarism from the community, please send an email to:
info-contact@alibabacloud.com
and provide relevant evidence. A staff member will contact you within 5 working days.