understanding macd

In-depth understanding and exploration of Java class loading mechanism-deep understanding of javaIn-depth understanding and exploration of Java class loading mechanism ----1. java. lang. ClassLoader class Introduction Java. lang. the basic function of the ClassLoader class is to find or generate the corresponding byte code based on the name of a specified class,

A deep understanding of Python decorators and a deep understanding of python decorations Decorator introduction: Decorator is an advanced Python syntax. The decorator Can process a function, method, or class. In Python, we have multiple methods to process functions and classes. For example, in the Python closure, we can see the function object as the return result of a function. Compared with other methods,

A comprehensive understanding of python strings and dictionaries, and a comprehensive understanding of python Many serial method strings are also applicable,However, the string is immutable, so some methods that try to change the string are not available. 1 string formatting 1) format the string with tuples or dictionaries Format = "hello, % s. s % enough for you? "Values = ('World', 'hot ')Format % values

In-depth understanding of the security of mt_rand () random numbers in PHP, and in-depth understanding of mt_rand Preface Many security vulnerabilities related to mt_rand () have been dug up some time ago, which are basically caused by incorrect understanding of random number usage. Here I would like to mention a pitfall of manual on the php official website. Let

A deep understanding of Python variables and constants, and a deep understanding of python Variables A variable is a region in the computer memory. It can store values within the specified range and change the value. For variable-based data types, the interpreter allocates the specified memory and determines what data can be stored in the memory. A constant is a read-only memory area. Once initialized, the

Complete Understanding of the Classic Mode of js object creation, and comprehensive understanding of js 1. Overview Create an object through the constructor, and sometimes forget to write new, then the function will return undefined You can create a createXXX function and encapsulate new in the system. Function Student (props) {this. name = props. name | 'anonymous'; this. grade = props. grade | 1;} Student

First understanding of PHP running process and principles (1), first understanding of php First understanding of PHP1. run php using the script command line(1)open cmd.exe (winkey + R)(2.exe find php.exe (drag it to cmd)(32.16input command php.exe-f "actual file path"Note: The runtime code php.exe-r "code"Concept:In the running mode of web software, a request is

Deep understanding of python multi-process programming and deep understanding of python Programming 1. python multi-process programming background The biggest benefit of multi-process in python is to make full use of the resources of multi-core cpu. Unlike the multi-thread in python, it is limited by GIL and can only be allocated to the cpu. in python multi-process, it is suitable for all scenarios where mu

Deep understanding of JS for fast sorting and de-duplication, deep understanding of js for sorting JS's quick sorting and JS's focus on the interview are quite a few questions. below is my understanding of quick sorting, and the Code for quick sorting and deduplication. 1. What is quick sorting? Step 1: Fast sorting is to remove the median value. If the median va

Creating object objects directlyvar New Object (); var = {};stu.name= "Zhangsan"="stu"function() { alert ( "My name Zhang San"); }You can also use the Stu as a module, the module has a number of objects, the following example for a simple shopping cart system module!Shoppingcar.carinfo = function (obj) {Shoppingcar.carinfo . Carnumber = Obj.carnumber;.....}//Shopping Cart ObjectShoppingcar.orderinfo = function (obj) {Shoppongcar.orderinfo. ordernumber = obj.ordernumber;...}//Order ObjectCall

Respect for the original: http://www.cnblogs.com/Alandre/p/4456719.htmlFirst, the understanding native namely Jni,java native InterfaceAll a language, all hope is pure. For example, to solve a certain program is like to write in this language alone. Java platform has a user and local C code interoperability API, called Java Native Interface (Java Local interface).Second, using Java to call C's "Hello,jni"We need to follow the easy steps:1. Create a Ja

Writer:bysocket (mud and brick pulp carpenter)Weibo: BysocketWatercress: BysocketMason first met Navicat is a hashcode method in the Java.lang.Object source code:? 1 public native int hashCode(); Why is there a navicat? This is the place where I want to study. So today Masons want to summarize the next navicat.First, the understanding native namely Jni,java native InterfaceAll a language, all hope is pure. For example,

JQuery understanding (2) functional functions; jquery understanding functional functions In javascript programming, developers usually need to write many small programs to implement some specific functions. For example, browser detection, string processing, and array editing. JQuery summarizes these commonly used programs and provides many practical functions. 1. Check the browser. JQuery obtains browser in

Deep understanding of polymorphism ., Deep understanding of Polymorphism 1. Inheritance: if Class A can obtain public information from Class B, this mechanism is called inheritance.2. About the base keywordBase. parent class attributesBase. Parent Class MethodBase ()3. protected is protected. It can be accessed in the current class and subclass. (Locked/restricted objects: variables in the class)4. Secret o

Deep understanding of CSS background and deep understanding of css* Directory [1] background color [2] background image [3] background tile [4] background positioning [5] background Association [6] background origin [7] background cropping [8] background size [9] In front of compound background The background is a composite attribute like the font, and it is a frequently used attribute. In CSS3, the backgro

Deep understanding of CSS pseudo classes and deep understanding of css pseudo* Directory [1] ANCHOR [2] UI element [3] structure pseudo class [4] Other prefix Pseudo classes are often confused with pseudo elements. The effect of pseudo elements is similar to that of adding an actual element. The effect of pseudo elements is similar to that of adding an actual class. In fact, to distinguish the two, css3 has

Deep understanding of absolute CSS positioning, deep understanding of CSS positioning* Directory [1] define [2] features [3] display [4] clip [5] in front of overflow We have already introduced the positioning offset and stack. In this example, a large number of applications have applied absolute positioning. Compared with relative positioning and fixed positioning, absolute positioning has a higher applica

seen called the Native Stringfromjni () method, using the keyword native to inform the Java compiler, this is implemented in another language, and then by the addition of shared library (Static statement block) Hello-jni to tell the virtual machine native method of the specific implementation. The Java.lang.System class provides two static methods that load and LoadLibrary use to load a shared library at run time. Let's take a look at the specific implementation.#include The first parameter, JN

WebAPI preliminary understanding (CURD), webapi understanding curd 1. Create an MVC project and select API 2. Add the Product class, IProductRepository interface, and ProductRepository class to the Models layer. Public class Product{Public int ID {get; set ;}Public string Name {get; set ;}Public string Category {get; set ;}Public decimal Price {get; set ;}} Public interface IProductRepository{IEnumerable Pr

First understanding of ajax technology, first understanding of ajax First, let me introduce why I need ajax technology. 1. There is a text input box on the page. When I click Submit, I can pass the value in the text box to the background. 2. parameters received in the background 3. Connect to the database and add the passed content to the database. 4. Call the method to pass the returned value to the foregr