understanding macd

Deep understanding of linear gradient in css3 and deep understanding of css3 gradientLinear Gradient in css3Linear gradient formula: Background-image: linear-gradient ([ (Angle deg or acronyms, one or more gradient color key nodes (separated )); This method is similar to a regular expression: []: Represents a character bit. It is generally used with "|" to select a character from; |: Indicates "or", which m

Deep understanding of shared memory for inter-process communication and deep understanding of processes Shared memory is the most useful communication method between processes and the fastest IPC format. It is designed to reduce the running efficiency of other communication mechanisms. The shared memory of two different processes A and B means that the same physical memory is mapped to the process address s

Deep understanding of JS prototype and prototype chain, and deep understanding of js prototype PrototypeIt is a concept that is hard to understand in JavaScript. There are also many prototype-related attributes, the object has the prototype attribute, and the function object has the prototype attribute, the prototype object has the "constructor" attribute. I. Initial Knowledge prototypeIn JavaScript, the Pr

A deep understanding of the signals of inter-process communication and a deep understanding of Process CommunicationSignal and Signal Source Signal nature A signal is a simulation of the interrupt mechanism at the software level. In principle, a process receives a signal and the processor receives an interrupt request. The signal is asynchronous. A process does not have to wait for the signal to arrive thro

A deep understanding of the display attribute and a deep understanding of the displayDirectory [1] block [2] inline [3] inline-block [4] none [5] list-item [6] run-in [7] table [8] inline- table [9] Before table-cell [10] table-caption The display attribute is very common in web page layout, but it is often used only a few attribute values, such as block, inline-block, inline, And none. This article will de

Deep understanding of the box model, deep understanding of the ModelDirectory [1] width and height [2] padding [3] margin [4] Front of the border All document elements generate a rectangular box, called an element box, which describes the space occupied by an element in the document layout. In addition, each box affects the position and size of other element boxes. Width and height In CSS, you can set an ex

Make a summary of the contents of the first chapter:The first chapter is an overview, not to do too much detail on the description, more is the ideological doubts. What are the reasons for learning a high-level computer language or specifically learning the Java language? Always keep a scientific attitude. First of all understand why, then is the engineering how to do, and finally in the theory of mastering very familiar situations, how to do better. After learning about why Java is being learn

today is my first time since Learning programming blog, write down the weekday learning, originally these days are learning the web framework but I think it is necessary to comb the previous study. After all, learning Java before is very sketchy just for the purpose of exams. So, thinking in Java is the main book to consolidate Java from the beginning. The search for gaps and better understanding. 　　everything is an object　　 .　In C + + we know that ma

Understanding and simple implementation of Spring Aop, springaop understanding1. The Aspect-Oriented Programming mentioned in the AOP concept is actually a set of actions when processing a series of business logic. For example, to connect to the database: load the driver ----- get class -------- get the connection object ------- access the database ------ query --------- operation results for the above series of actions we regard the dotted line as a

Format:(function () {//code}) ();The first pair of parentheses of the enclosing function (function () {}) returns an unnamed function to the script, followed by a pair of empty parentheses that immediately execute the returned unnamed function, which is the parameter of the anonymous function in parentheses.(function (ARG) {alert (arg+100);}) (20);This example returns 120.Come back to see jquery plugin writing(function ($) { //Code Goes here}) (JQuery);This code is equivalent tovar A=functon ($

Recently, some good articles have been found on overseas websites, collected and sorted for your own understanding, recorded as notes, so that you can have memories in the future.ASP. NET is a very powerful platform for building Web applications. It provides great flexibility and capabilities so that it can be used to build all types of Web applications. most people are only familiar with high-level frameworks such as WebForms and WebServices. the. NE

, single-case1. Instance variable: the instance variable belongs to the class object, that is, the object instance is private and is allocated in the heap of the virtual machine.2. Verify thread security for instance variables:(1) From the program, we can see that when the singleton mode, there is a resource conflict, when not a singleton mode, there will not be a thread conflict.(2) Program operation result diagram:Figure 1:Figure 2:3, the conclusion: the instance variable is the instance objec

Last time is a note on a chat item, inside the socket is also involved in a lot. So what is a socket?The two programs on the network realize the exchange of data through a two-way communication connection, one end of this connection is called a socket.In layman's terms, I think it is a connector that connects the two. The English meaning of the socket is "hole" or "socket". He's the equivalent of that socket, connected to the communication between different virtual machines or different computer

(pSpatialFilter, True) Use Cursor to access records Now you have a good understanding of the general mechanism for generating cursor. Let's see how to use a cursor to access the returned records. Remember, cursor is a set of records from only one table or element class in memory. When a cursor is generated for the first time, an associated pointer is also generated. You can use a cursor to access a row of records at a time. This pointer helps you tra

The following things are not what I have created. They are the essence of some books I think. After learning about JavaScript, I feel that my understanding of JavaScript has been further improved, find out something that is also known as a trick or a trick. I will apply this knowledge to a new framework. The goal of the new framework is to use js to display various charts. Although there are already many frameworks with this function, however, I think

Understanding the emulator's limitations Although the new simulator keeps up with the development of devices and ensures high-fidelity simulation of devices and the convenience of developers, each simulator has some limitations when simulating real devices. The smartphone code run by the simulator in the smartphone SDK is compiled for the x86 CPU. In most major application development scenarios, this is enough to meet the requirements. However, this t

Coredata first class understanding coredata, coredata first class understandingProblem There are many ways to persistently store data in iOS/Mac: NSUserDefault, Key chain, C language file interface, NSFileHandle, write method in basic framework, archive, and so on. In practical applications, we often need to convert the data into objects in a certain format, and perform certain filtering and other operations before using them, which is not very conven

forced conversion operation to convert it to object. Forced conversion does not change B object, but your B object view limits the data and behavior to. After B is forcibly converted to a, the can be forcibly converted to B. If Class B is used as Class B, data and behavior of Class A and Class B can be obtained at the same time. Objects can represent multiple types of capabilities called polymorphism. by understanding these concepts, you can define

[An in-depth understanding of javascript prototype and closure series] It took half a month to complete the draft, seek recommendations, and gain an in-depth understanding of javascript As you can see from the following directory, this series has 16 articles, plus two supplemented articles, a total of 18 articles. It was written for half a month and started in December September 17. When every article is up

ASP. NET is a very powerful platform for building Web applications. It provides great flexibility and capabilities that can be used to build all types of Web applications, as ASP. NETProgramPersonnel, should have a deeper understanding of its working principles. This period of time in the domestic and foreign network for verification and understanding to summarize, collect and sort out and when the programC