understanding macd

A deep understanding of javascript scopes and closures, and a deep understanding of javascript Scope Scope is the scope of a variable and function. All variables declared in the function in javascript are always visible in the function body, and global and local scopes are available in javascript, however, there is no block-level scope, and the priority of local variables is higher than that of global varia

A deep understanding of Spring transaction principles and a deep understanding of spring I. Basic principles of transactionsThe essence of Spring transactions is the database's support for transactions. Without the database's support for transactions, spring cannot provide transaction functions. To use transactions to operate databases only using JDBC, follow these steps:Get Connection con = DriverManager.

A deep understanding of whether function passing parameters in python are value passing or reference passing, and a deep understanding of python At present, most blogs on the internet come to the following conclusions: Python does not allow programmers to choose whether to pass values or pass references. Python parameters must be passed in the "passing object reference" method. In fact, this method is equiv

In-depth understanding of mysql Data Transmission coding principles, in-depth understanding of mysql I. Basic concepts (Here we reference http://www.laruence.com/2008/01/05/12.html) 1. Given a series of characters, assign a value to each character and use a value to represent the corresponding character. This value is the character Encoding (Encoding ). For example, if 'A' is given A value of 0 and 'B' is g

In-depth understanding of the automatic loading mechanism of PHP classes and deep understanding of php Loading Php automatic loading: Before php5, we need to use a class or class method, which must be included or require before it can be used. Every time we use a class, we need to write an include statement, which is troublesome. The php author wants to make it simple. It is best to reference a class. If no

Record the asynchronous understanding of. net and the asynchronous understanding of. net. Recently I have been studying. net framwork is asynchronous. I have read a lot of blogs and learned a lot. But on MSDN, I am not very familiar with the deadlock caused by await on the UI. After thinking this morning, I feel restricted by the execution process of a single thread. Of course, I recorded my own thinking p

Three years of work, special support for program understanding, three years of process understanding I am an ordinary programmer who struggles to work in humdu. I carry my dreams and lofty aspirations. To realize my ideals, I need to constantly improve myself and strengthen myself. After three years of work, I have developed the habit of taking notes since I went to school. This also makes some summative re

The path to a Python guru [1] first understanding of python, first understanding of the path to python Python Introduction 1: Founder of Python Python /), it is an advanced programming language for interpreting, object-oriented, and dynamic data types. It was invented by Guido van rosum in 1989 and released in 1991 as the first public release. The founder of python is Guido van rosum ). Durin

Your understanding of aja (1 and 2) and your understanding of aja What Is Ajax? Ajax is short for Asynchronous JavaScript and XML. This technology can request additional data from the server without detaching the entire page, which brings a good user experience. The traditional HTTP request process is like this, the browser sends a request to the server-> the server generates a response-> server returns the

Reference: Https://github.com/angular/angular.js/wiki/Understanding-DirectivesInjecting, compiling, and linking functionsWhen you create a directive, there is essentially up to 3 function layers for your to define [1]:MyApp.directive' UIJQ‘,functionInjectingfunction () {= = = Injectingfunction = = =/Logic is executed 0 or 1 times per app (depending on if directive is used).Useful for bootstrap and global configurationreturn {Compile:functionCompilingf

Joseph's ring problem-preliminary understanding + array implementation, Joseph's preliminary understanding Joseph's ring problem-preliminary understanding + Array Implementation The first contact with Joseph's ring problem is still in the C language book. The specific questions are as follows: n people sit in a circle, select a person (for example, 1st), and rep

A comprehensive understanding of the javascript ternary operators and a comprehensive understanding of javascript Ternary operators: For example, the name represents three operands. Is the syntax a condition? Result 1: result 2. Here you write the condition in question mark (?) Result 1 and result 2 are separated by colons. If the conditions are met, result 1 is returned. Otherwise, result 2 is returned.

Deep understanding of jQuery event removal, deep understanding of jquery Removal Sometimes, when an event is executed, you can solve it in a certain way if you want to cancel the event. For example, the bind () method can be used to remove the effect of an event through the unbind () method. For example, in the following case: Html section: When the button btn is clicked, three click events are triggered.

Deep understanding of C pointer Reading Notes, deep understanding of pointers Chapter5.h # Ifndef _ CHAPTER_5 _ # define _ CHAPTER_5 _/* Study Notes for deep understanding of the C pointer-Chapter 5 * // * strings that should not be modified should use const char * de-modifier */size_t _ strlen_test (const char *); /* several methods for returning strings */char

I wrote my own book "deep understanding of memory management for Android virtual machines". I don't just write and play, but I have a deep understanding of Java virtual machines. Baidu Network Disk address: https://pan.baidu.com/s/1jI4xZgE I named it memory management for an in-depth understanding of Android virtual machines. This book consists of two parts: th

Simple understanding of Http and TCP, and understanding of tcp The TCP protocol corresponds to the transport layer, while the HTTP protocol corresponds to the application layer. Essentially, the two are not comparable. Http is based on TCP. When the browser needs to obtain webpage data from the server, an Http request is sent. Http will establish a connection channel to the server through TCP. When the data

A deep understanding of the JavaScript series (33): The Strategic Pattern of the design pattern, and a deep understanding of javascriptIntroduction The rule mode defines the algorithm family and encapsulates them separately so that they can replace each other. This mode prevents algorithm changes from affecting the customers who use the algorithm.Body Before understandi