what is transcode number

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What is the knowledge of this function in PHP? what is its function?

What is the knowledge of this function in PHP and what is its function? The following function has never been used. First, what is PHP knowledge? File processing? Or binary? Second, note it from the beginning to the end. Why have

What is a lambda? What good is it?

A lambda function is a function that can receive any number of arguments (including optional arguments) and return a single expression value1, lambda function is relatively light, that is, still, it is suitable for the need to complete a function, but this function

What is a Python threading module? 3 min To learn what a threading module is

This article mainly describes What is a thread: Threadsis the smallest unit in which the operating system is capable of operation scheduling. Processes are included in the process and are the actual processing units in the process. A thread is a collection of instructions. A thread

What is CDN acceleration What is the use of CDN?

distribution In short, when the site opened CDN, users visit the site, not directly to the site of the original server, but a server distributed to your nearest server node, because the server close to you, so access speed or download speed will be faster. Do you remember the previous introduction of the computer Pepsi network to set up DNS? Also mentioned in the DNS server address must fill out the nearest to your IP, which is the nearest principl

What is the design? , what is design?

individual things, the world's reasons or conclusions as a precondition. Therefore, this deductive reasoning process, with the experience of predecessors to deduce, it is possible to draw conclusions are also wrong. For example: "People, all like to eat." I am human, so I like to eat. "Induction: From individual things to general principles or conclusions, through comparison, analysis, synthesis, abstraction and other methods to clarify the causal li

What is Ajax? The interaction Model (flow) of Ajax? What is the difference between synchronous and asynchronous? Ajax cross-domain solution?

What is Ajax? The interaction Model (flow) of Ajax? What is the difference between synchronous and asynchronous? Ajax cross-domain solution?What is Ajax: Asynchronous JavaScript and XMLAjax is

What is interruption? What is an exception?

interruption. After that, the processor will notify the OS that an interruption has occurred. In this way, the OS can properly handle this interrupt.Different devices have different interruptions, and each interruption is identified by a unique number. These values are generally called the interrupt request line (IRQ ). An interrupt can be divided into synchronous interrupt and asynchronous interrupt:1. S

What is the best fill factor for SQL index and what is the fill factor?

must allocate a new page somewhere on the disk, and the new pages and the original physical pages are not contiguous. As a result, Access uses random I/O instead of sequential I/O, which makes accessing index pages slower.So what is the ideal filling factor? It relies on the application's ratio of read and write to SQL Server tables. The first principle, follow the guidance below:Table with low change (rea

What is the group Control plus human system, and what kind of mobile phone is used in general?

of changes, the latest play is group control. Although so much of the enterprise can not grasp how to absorb the key point of powder, how to convert.Thor Micro-control principle is to use a computer to control a number of mobile phones up to 100, a person can easily control add powder, make friends circle. This software also conforms to the market trend, with th

What is the difference between OC and Swift? What is the difference between OCSwift?

What is the difference between OC and Swift? What is the difference between OCSwift? 4. constants and variable declarations The oc variable Declaration uses the type variable name = variable value method. The type is the built-in data type or custom type. The variable name m

What is a real estate certificate? What is the difference between a real estate certificate and a real estate certificate?

What is a real estate certificate?China's real estate registration was officially implemented on January 1, March 1, 2015. The real estate registration book certificate and real estate registration certificate formulated by the Ministry of Land and Resources were officially launched. After the new real estate register certificate is enabled by the real estate

What is Unicode, what is utf-8_css/html

is simply preceded by a 2 byte 0. UCS-4 is primarily used to save auxiliary planes, such as the second auxiliary plane in Unicode 4.0 20000-20fff-21000-21fff-22000-22fff-23000-23fff-24000-24fff-25000-25fff-26000-26fff-27000-27fff-28000-28 Fff-29000-29fff-2a000-2afff-2f000-2ffff A total of 16 auxiliary planes were added, extending from the original 65,536 encodings to nearly 1 million encodings. So since t

What is a database and what is it used?

I am always talking about database learning. I remember a teacher told us that it is easy for us to learn a programming language, database, and network programming in college. I have studied databases for a while, but I always know nouns like ADO (ActiveXDataObject), DAO (DataAccessObject), RDO (R I am always talking about database learning. I remember a teacher told us that it is easy for us to learn a pro

What is the BNF paradigm and what is the ebnf paradigm?

"} " identifier :: = letter {letter | digit} quoted_symbol: = "{any_character}" " Extended bacos paradigm augmented BNFRfc2234 defines the extended bacos Paradigm (ABNF ). ABNF has been widely used in Internet definition in recent years. ABNF has made more improvements. For example, in ABNF, angle brackets are no longer needed. What is ebnf? Basic (Ebnf) Definition Related Ebnf For more infor

What is TCP/IP and what is UDP

, serial line, etc.) to transmit data. Protocols in TCP/IP Here's a brief description of what the protocols in TCP/IP are capable of, and how they work: 1. Ip Internet Protocol IP is the heart of TCP/IP and the most important protocol in the network layer. The IP layer receives packets from a lower level (network interface layer such as an Ethernet device driver) and sends the packet to a higher--

What is the Taskmgr.exe process? What is the role of Taskmgr.exe?

What is the Taskmgr.exe process? Askmgr.exe is used for Windows Task Manager. It displays the processes that are running on the system. The program uses Ctrl+alt+del to open, which is not a pure system program, but it can cause an unknown problem if it is terminated. In Mi

What is the difference between PHP overloading and rewriting? What is the difference between overloading and other languages, such as Java?

Problem: The contents of the PHP manual for overloading are as follows: PHP provides a "reload" (overloading) that refers to dynamically "create" class properties and methods. We do this by means of magic methods. such as __call ($funcname, $arguments), __callstatic ($funcname, $arguments) Overloading in the Java language refers to the ability to create multiple methods in a class that have the same name but have different parameters and different definitions. Methods are invoked by the

What is the difference between php reload and rewrite? What is the difference between heavy load and other languages (such as java?

Problem: The PHP manual contains the following content about overloading: quot; overloading quot; (overloading) provided by PHP means to dynamically quot; Create quot; class attributes and methods. We use magicmethods. For example, _ call ($ funcname, $ arguments) and _ callStatic (... problem: The reloads in the PHP Manual are as follows: the "overloading" provided by PHP means to dynamically "create" class attributes and methods. We use magic methods. For example, _ call ($ funcname, $ arg

What is python file targeting? What is the role of file positioning?

In the Python learning Session of this article today, let's look at python file positioning. In the next article I'll tell my friends what the file locator is in Python and what this file location can do. File location The tell () method tells you the current position within the file, in other words, the next read and write will occur after so many bytes at

What is process-oriented and what is object-oriented?

Class object (Player object) is responsible for accepting user input, and informs the second class object (Checkerboard object) The change of the chess piece layout, the Checkerboard object receives the change of the chess piece to be responsible to show this change on the screen, and uses the third kind of object (rule system) to decide the chess game.It is obvious that object-oriented

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