understanding netflow

In-depth understanding of php json arrays and objects, and in-depth understanding of json In the process of PHP backend and client data interaction, the JSON data is sometimes formatted in an irregular manner. The JSON data is an array and the JSON data is an object, which makes the client developers feel like they want to crash. Therefore, the frontend and backend personnel must first understand the json_e

A deep understanding of JAVA's static (combined with the C language) and a deep understanding of static 1 public class statictest {2 3 4 String X = "I am a non-static variable"; 5 6 7 static int butterfly = 0; 8 static String staticX = "I Am a static variable "; 9 static String staticZ = "I am also a static variable"; 10 11 12 statictest () {13 System. out. println ("I am constructor"); 14} 15 16 17 18 publ

A deep understanding of the usage of the Python modifier and a deep understanding of python Because functions or classes are all objects, they can also be passed everywhere. They are mutable objects and can be changed. Decorator is the act of changing a function or class object after it is created but bound to a name ). There are two meanings hidden after the "decorator": one is that the function plays a de

A deep understanding of magic methods in Python and a deep understanding of python I have been in touch with Python for a while, and I have been in touch with many Python-related frameworks and modules. I hope to share with you the Design and Implementation I have come into contact, so I took a small "Charming Python" label and gave myself a start. I hope you will criticize and correct me a lot. :) From fla

A preliminary understanding of linq to xml and a preliminary understanding of linqtoxml I recently learned about lint to xml and wrote a blog here, so that I can view it later ~~ 1. Frequently Used classesXmlDocument -- document (xml file) XmlElement -- Element (node) XmlAttribute -- attribute (node content) XNamespace -- namespace (xmlns) XDeclaration -- "1.0", "UTF-8" is generated by default when an XML f

In-depth understanding of the method with parameters ----- object as a parameter, in-depth understanding ----- After learning about the common parameter-based method, we will go into the perspective of the parameter-based method. In the array as the parameter method, we know that we can add the scores of multiple students to the array and print them out, How can we achieve this if we need to add not only th

Understanding IL code (2) and understanding il code The most basic IL Code mentioned in the previous article should be relatively easy to understand. Therefore, with the foundation of the previous article, this article will be explained in depth. First, I must introduce some important concepts: Evaluation Stack: This is caused. net clr automatically manages the memory during execution. Every thread has its

Understanding and understanding of events A class or object can notify other classes or objects of related events through events. The publisher determines when an event is triggered, and the user determines the operation to be performed to respond to the event. In C #, event processing is actually a kind of delegate with special signatures. Assume that the student receives the score immediately after the in

A deep understanding of the C ++ object model and a deep understanding of the c Object Model The C ++ object model is an important knowledge point. It learns the memory model of the C ++ object, you can understand the polymorphism principle in C ++, the class initialization sequence, and the class size.1 C ++ object model basics What are there in 1.1 C ++ objects? The C ++ object includes the following: S

Deep understanding of PHP kernel (5) variables and data types-structure and type of variables, and deep understanding of the kernel Link: http://www.orlion.ga/238/ Programming Language types can be divided into strong type and weak type. PHP is a weak type language, but C is a strong type language. Internally implemented in PHP on the official website, all variables are saved using the same data structure (

Methods for optimizing PHP programs (for better understanding) and for better understanding of php programs 1. If a method c ++ an be static, declare it static. Speed improvement is by a factor of 4. If a method can be static, make a static Declaration on it. The speed can be increased to 4 times. 2. echo is faster than print. echo is faster than print. 3. Use echo's multiple parameters instead of string co

Preliminary understanding of processes and multithreading and deadlocks, and multi-thread understanding of processes Concept:ProcessIt is an execution activity on a computer, a dynamic execution process of a program, and a unit of resource allocation by the operating system. When a program is run, a process is started.ProcessAttackers can access processes on local or remote computers and start and stop proc

nesting2. For CSS and JS1) Try to use the outer chain CSS style sheet and JS script. The structure, performance and behavior are divided into three blocks, which conform to the norm. At the same time, improve the page rendering speed, improve the user experience.2) style as little as possible with the line style sheet, so that the structure and performance of the separation, tag ID and class attributes such as the name to see explanatory, the less the label, loading faster, user experience, cod

In the end, how high is the height of this line-height line:In the inline box model, there is a line boxes, this thing is invisible, the work of this thing is wrapped in every word. A line of text boxes. For example, "Iverson retired" The 5 words, if they are displayed in a row, you Iverson again, sorry, only a line boxes cover you; but "Chun Brother pure Man" 5 words, if the vertical writing, one line, that is really enough man, a word to cover the lines boxes, So a total of five line boxes. Li

instance=new Singletonclass ();135 } 136 } 137 }138 return instance;139 } $ }*/141 /***142 * Recommended Usage143 */144 /*Public class singletonclass{145 Private Singletonclass () {}146 static inner class of//java147 private static Class singletonclassinstance{148 private static final Singletonclass instance=new Singletonclass ();149 } Max Public static Singletonclass getinstance () {151 return singletonclassinstance.instance; the

, Hp's Alpha and Pa-risc series, and the Sun's UltraSPARC Series. Using the Harvard bus structure, single-cycle execution instructions, can achieve efficient pipeline operation, oriented to high-level language.The complex instruction set cisc, the program each instruction serially executes sequentially, this kind of control is relatively simple, but the computer parts utilization is low, the instruction is unequal, the instruction number is many, therefore the programming and the design processo

Understanding of the continuum hypothesis in macroscopic mechanics:Macroscopic mechanics (such as fluid mechanics, elasto-plastic mechanics, etc.) are the objects of a large number of molecules, at this time each set constitutes a small micro-body, the whole object is made up of the countless small micro-bodies continuously without gaps in the composition. Because we only need to pay attention to the nature of the objects on each set, such as density,

ThreadLocal: simple understanding and threadlocal understandingIn the code of the java open-source project, you can see the ThreadLocal attribute in a class: private static ThreadLocal I saw ThreadLocal while reading a book, but suddenly I couldn't remember its usefulness .. I was surprised to find that I had read the book. So I checked it online immediately.It originally meant the local variable of the thread. ThreadLocal is more like a tool class fo

If you encounter this problem at work, you only know the alignment of the vertical-align attribute settings. Therefore, you need to thoroughly understand the vertical-align function and sort it out by the way. First, let's take a look at some vertical-align attributes: Value Description Baseline Default value. The element is placed on the base line of the parent element. Sub Vertical align text subscript. Super Vertical Alignment

Preliminary understanding of GCD and understanding of GCD // (1) use an asynchronous function to add tasks to the concurrent queue. // conclusion: Enable three subthreads at the same time-(void) test1 {// 1. obtain the global concurrent queue dispatch_queue_t queue = dispatch_get_global_queue (DISPATCH_QUEUE_PRIORITY_DEFAULT, 0); // 2. after adding a task to the queue, You can execute the task // asynchrono