emm meaning

Python core style: Avoid using underscores as the start of variable names.Because underscores have special meanings for the interpreter and are symbols used by built-in identifiers, we recommend that programmers avoid using underscores as the starting point for variable names. In general, variable name _xxx is considered " private "and cannot be used outside of a module or class. When a variable is private, it is good practice to use _xxx to represent variables. Because the variable name __xxx_

ANSI and Unicode encoding, TCHAR | LPSTR | LPCSTR | LPWSTR | LPCWSTR | LPTSTR | meaning of LPCTSTR, lpcstrlpwstr One character can be expressed in 1-byte, that is, ANSI encoding; A character can also be expressed in 2-bytes, that is, Unicode encoding (Unicode actually contains more content than 2-bytes ). Visual C ++ supports char and wchar_t as the original data types of ANSI and Unicode. For example char cResponse; // 'Y' or 'N'char sUsername[64];//

content to clipboardPHP Code:if ($a) {Include ("a.php");}and require () is different from include (), no matter what the value of $ A, the following code will include the file a.php into the file:Copy PHP content to clipboardPHP Code:if ($a) {Require ("a.php");}In the case of error handling, the include statement is used, and if an error occurs, the program skips the include statement, although an error message is displayed but the program continues! But Requre will give you a fatal error.Of co

Click to enter _ more _java thousand ask1, what is the meaning of 2 in the Java EE?The meaning of 2 in J2se,j2se,j2me is to be traced back to 1998 years.1998 Java 1.2 release, 1999 released the Java 1.2 Standard Edition, Enterprise Edition, mini version of the three versions, in order to differentiate these three versions, respectively, called Java2se,java2ee,java2me, referred to as J2SE,J2EE,J2ME. Therefor

/** 2, please explain the meaning of the characters ' \ ' in Java, what is the role?*Answer* In Java the backslash ' \ ' represents the meaning of the escape character, which is a marker** When the compiler reads this tag, it knows that the next character is not an ordinary character, but a translated character.* It will operate based on the meaning of the escape

PYTHON Specifies special variables/methods using underscores as variable prefixes and suffixes.There are four main cases1.1. Object # Public2. __object__ # Special, Python system use, user should not define like it3. __object # Private (name mangling during runtime)4. _object # Obey Coding Convention, consider it as privateCore style: Avoid using underscores as the start of variable names .Because underscores have special meanings for the interpreter and are symbols used by the built-in, we reco

;! function () {} (); ;! What's the use?Go from grammar to open. The semicolon in JavaScript indicates the end of the statement, plus at the beginning. It may be for compression and other methods to cut, indicating a new statement starts. So, let's say it's in a separate JS file. The beginning of the semicolon is no matter what the meaning, can be deleted.An exclamation point is a logical operator, which is "non", and is commonly written if (!true) {}

The meaning of the square operation of the adjacency matrix of a direction graph This is an assignment in the first chapter of graph theory algorithm application. Now, the linear algebra is too bad. Hey First code: #include The title requires the matrix to be written after the square of the adjacency matrix of the direction graph, then say the meaning of it, write code nearly one hours, want to

One, what is a single case mode? 1, meaningAs an object's creation pattern, the singleton pattern ensures that a class has only one instance, and instantiates it and provides it globally to the entire system. Instead of creating an instance copy, it returns a reference to an instance stored within a singleton class.2, the single example mode of the three points:(1). A static member variable is required to hold a unique instance of the class:private static $_instance;(2). Constructors and cloning

1 Preface In many foreign computer books and some of the third open source software demo often use two English words foo,bar. What the hell does that mean? From the IT life of the cock Silk circle simple These two words to now I still do not know the true meaning of these two words, today it is necessary to check the summary. 2 explanation on Wikipedia Original: The terms foobar, Foo, bar, Baz and Qux are sometimes, used as placeholder names (also

The purpose of forced type conversion in C language, the basic format, the essential meaning of variables in C, and the essence of Variables C forced type conversion Reading directory: 1. Purpose and basic format of forced type conversion Ii. Essential Meaning of variables in C Iii. Forced type conversion of common variables Iv. pointer variable type conversion 1. Purpose and basic format of forced type c

Call and apply the approximate use of the same, a simple look at the following example:We can call () and apply () as a method of an object, calling the function indirectly in the form of a calling method.That is, the method is the original method, but the parameter is the parameter of the object contained in call.The first parameter of the call function and the Apply method is the object to pass to the current object, and this inside the function. The arguments that follow are all arguments pas

The meaning of the four matching characters % indicates zero or multiple arbitrary characters. It indicates any character in the specified range []. Any single character [^] is not in the specified range. the character string must be enclosed in quotation marks, for example, the following example: LIKEBR % returns any string starting with BR. LIKEBr % returns The meaning of the four matching characters % i

Meaning: the transaction must have a very clear start and end point. Each data operation statement in SQL Server, such as SELECT, INSERT, UPDATE, and DELETE, is part of an implicit transaction. Even if there is only one statement, the system regards this statement as a transaction, either to execute all statements or to execute nothing. After the transaction starts, the firm Meaning: A transaction must have

From:http://www.jb51.net/article/71532.htm In JavaScript, Void is an operator that specifies that an expression is evaluated but does not return a value. I'd like to use Ajax for all the usual code like this: The code is as follows: But what is the meaning of void (0) here? The void operator uses the following format: 1. javascript:void (expression) 2. Javascript:void expression Expression is a standard of Javascript to evaluate. Parentheses on the o

Description of the. classpath file in the Eclipse project:The following is the content of A. classpath file: Note:1. Meaning: Path of the source code of the project -- under the SRC file of the current project path2. Meaning: The External jar package to be applied in this project, the specific path is G:/java_ocr/Asprise-OCR-Java-Windows_XP_32bit-4.0/aspriseocr. Jar here the absolute path is usedNote: Do

head before he had time to dry his urine. Wei Zhen, a Chinese coowner of Guan Yun, finally lost in the hands of Lu Meng, an unknown minor. Liu Xuande, the hero of the world, has been planted in Lu Xun, a white-faced scholar. It is also mighty, and its death is also wrong. Ouyang Xiu's "Ling Guan Chuan preface" said: Therefore, Fang Qisheng is also a hero of the world, and cannot compete with it; and its decline is also, the death of dozens of moles, and the death of the country, smile for the w

To understand the backlog argument, we must realize, a given listening socket, the kernel maintains the queues:To understand the meaning of the backlog parameter, we must understand that for a listening socket,kernel maintainer two queues:1.An Incomplete connection queue, which contains an entry for each SYN that have arrived from a client for which the server Is awaiting completion of the TCP Three-way handshake. These sockets is in the SYN_RCVD stat

Summary: When we write a program, it is always unavoidable to make mistakes, no matter how cautious. These errors often confuse the PHP compiler. If developers are unable to understand the meaning of compiler error messages, they are not only useless, but often frustrating. When we write a program, it is always inevitable to err on the wrong way, no matter how cautious. These errors often confuse the PHP compiler. If developers are unable to understa

Most of the time, I think, what is the purpose of human life? For fame and fortune? For life? To pursue? For responsibility? Or is it just for simplicity? This problem may cause a lot of questions. You may have been living for more than 10 years, and even have been living for decades, but you do not know what your life is. Sometimes I think it is a good thing to read more books. Sometimes I think it may not be a bad thing to read less books. Many people have low knowledge and knowledge. They th