understanding macd

In-depth understanding of PHP principles of execution cycle analysis, in-depth understanding of PHP This article describes the PHP principle of the execution cycle. Share to everyone for your reference, as follows: The execution cycle of PHP, from the first PHP script we wrote to the last script is executed, the results are executed, this process can be divided into the following stages: First of all, Zend

In-depth understanding of the Count function in PHP, in-depth understanding of Phpcount In PHP programming, when iterating over an array, it is often necessary to calculate the length of the array as the judgment condition for the end of the loop, and in PHP the operations of the arrays are very frequent, so count is a common function, and the following is a look at the concrete implementation of the Count

In-depth understanding of the internal structure of the PHP kernel (v) functions, in-depth understanding of internal structures PHP functions include user-defined functions, intrinsic functions (print_r count ...), anonymous functions, variable functions ($func = ' Print_r '; $func (Array (' A ', ' B ');) PHP kernel source will be divided into the following types of functions #define Zend_internal_function

Understanding OAuth 2.0, Understanding oauth2.0 OAuth is an open network standard for licensing (authorization) that is widely used worldwide and is currently available in version 2.0. This paper makes a concise and popular explanation for the design idea and running flow of OAuth 2.0, and the main reference material is RFC 6749. First, the application scenario To understand the application of OAuth, let

In-depth understanding of the streams tools in PHP, in-depth understanding of phpstreams Streams is a powerful tool that PHP provides, and we often inadvertently use it, and if good use will greatly improve PHP productivity. When you harness the power of streams, your application will ascend to a new height. The following is a description of streams in the PHP manual: Streams was introduced in PHP 4.

Code review should be a fundamental system in any important software development effort. Does not refer to the product process alone-it is everything. and code reviews don't take a lot of time and effort, but it can make a huge impact.　　What can I get from the code review?For code review, check with other people's eyes before the code is submitted to prevent bugs from mixing. This is the most common understanding and the most extensive

A deep understanding of the null "type" in java and a deep understanding of null This article focuses on examples of null "type" in java. The details are as follows. First, we will give a simple null-related question, which will lead to our discussion of null. Later, we will explain the "type" of null according to the official language manual. Question: Can the following programs run correctly? Resolution:

Let's talk about impress. js's preliminary understanding and impress. js's understanding 1. Understanding of impress. js Impress. js uses CSS3 and JavaScript to implement a presentation layer framework (Demo tool) for developers ). Currently, common developers can use impress. js to develop demo tools with similar effects, but the performance is better than FLASH

A deep understanding of variable assignment in Python and a deep understanding of python Preface In Python, the variable name rules, like most other advanced languages, are affected by the C language. In addition, the variable name is case sensitive.Python is a dynamic type language. That is to say, you do not need to declare the variable type in advance. The type and value of the variable are initialized a

change. But for the sake of convenience, I only drew a picture to express the changes of these three prototype references. In the heap, the right side is the memory representation of the function object, the middle is the pointer to the prototype property of the function object, and to the left is the object instance created by the function object. The pointer to the prototype property in which the function object is written dog1,dog2,dog3 the three reference changes corresponding to Dog.protot

A deep understanding of the event transfer mechanism of the View, and a deep understanding of the view Introduction: Currently, there are more and more cool Android controls on GitHub. On the one hand, we can make the App look beautiful, and on the other hand, we developers can learn a variety of knowledge from it. Write this blog post to record the knowledge blind spots that are exposed in the process

A deep understanding of javascript function parameters and closures, and a deep understanding of javascript Recently I have been studying javascript Functions. functions are the first-class objects of javascript. To learn javascript well, I must have a deep understanding of functions. I have compiled the learning process into an article. One is to deepen my

Understand global variables in PHP and global variables. A comprehensive understanding of global variables in PHP, a comprehensive understanding of global variables in PHP, pre-defined several Super global variables (superglobals), which means that they fully understand the global variables in PHP in all scopes of a script, comprehensive understanding of global v

UI-theory of first understanding, ui-theory of first understanding A good app not only needs good functions, but also has a good interface, so that both internal and external modifications can be regarded as a good App. In fact, just like people, you can't just be handsome, but have a connotation (to be clear, it doesn't mean cool ). Unconsciously, It has been eight years in the garden, and it has been eig

In-depth understanding of jsonp for cross-origin access and in-depth understanding of jsonp for cross-origin access In our project, we fully utilize the jsonp cross-domain feature to complete simple single sign-on function and unified permission authentication control, the implementation idea is not complex. Compared with various products that implement Single Sign-on, it can be said that each has its own a

A deep understanding of floating point numbers in JavaScript and a deep understanding of javascript Javascript has only one numeric data type. js classifies it as a number, whether it is an integer or a floating point number. Typeof 17; // "number" Typeof 98.6; // "number" Typeof-2.1; // "number" All numbers in js are double-precision floating-point numbers. It is a 64-bit encoded number developed by the IE

In-depth understanding of binary complement and further understanding of Complement Article SourceBackground We all know that the computer uses a complement to represent an integer, but many people cannot understand the meaning of the complement, so we can share our understanding. First, let's talk about the definition and basic nature of the complement code:1)

the object of everything!!When designing a class, remember that the object is shaped by the model of the class. Objects known to the object are called I: instance variables, which are both properties of the object;The actions an object can perform are called: methods. Like what:public class dogtest{public static void Main (String [] args) {Dog dog = new Dog ();//Create a Dog objectDog.name = "F";//Access the object's variable value, that is, the property valueDog.play ();//Call method to let th

After downloading SOLR and extracting it, we find that there are a lot of things in SOLR's catalogue, at which point we may feel panic and do not know how to do it, let me take you to know it.1. After decompression, the SOLR directory structure is as follows:Although there are a lot of files, but we need to actually two, such as the picture with the red box of the document SOLR and WebApps, other documents you can ignore it, interested can see the five-minute SOLR tutorial.2. Deploy to TomcatDep

A deep understanding of javascript prototype chain and inheritance, and a deep understanding of javascript In the previous article, I introduced the concept of prototype and learned the relationship among the three friends in javascript: constructor, prototype object, and instance: every constructor has a "patron saint"-a prototype object. The prototype object also contains a "location" of the constructor,