refactoring methods and learn more refactoring techniques. Michael Feathers recommends that you pay attention to things that seem useless or especially useful during this process so that when you finish this exercise and actually modify them, only in this way can we make things right-when we modify the things, we should focus on methods and test while modifying.
What is "large-scale" reconstruction?
Simple
What exactly is the callback function ?, What is the callback function?
I was confused when I saw the callback function today. I found a lot of Search Engine information, but I did not understand it after reading "c and pointer.
Briefly describe what
valid operations in the execution of a program, with a clear execution sequence between the different operations, if an operation is time consuming or is stuck in a long wait (such as waiting for a network response), the program will not respond to actions such as a mouse and keyboard, This time-consuming thread can be assigned to a separate thread to execute, making the program more interactive.2) thread
1. What is C #:Solution 1:c# is a development language, is from C and C + + evolved, a friend play called "C Four +", here the "#" number, do not read "Well", and read " sharp" I find in the online Chinese reading method called "Sharpe" also do not know right or not, HoHo an
With the development of the network, VoIP services and unified communication platforms become more and more important. The SIP protocol is an exciting focus. Some may ask, what is the SIP protocol? What's better about it? Here we will go into more details.
The Chinese meaning of the SIP protocol is the process initiali
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
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
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
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
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: Asynchronous JavaScript and XMLAjax is
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
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
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?
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?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
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
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
"} " 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
, 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--
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