PHP

I have never written recursion before (in fact, I have no idea about algorithms at all). I just had this requirement. I tried to write it and found it quite easy, especially to record it. The database is dedecms by default, dede_arctype is the

Post a record to the php to query the source code of the express waybill number, which can be used to query the record of the express waybill number of various types of express parcels. It is not a problem for zhongtong, yuantong Express, and SF

When running the program, we 'd better know where the data is stored. Pay special attention to the memory allocation. Data can be stored in six locations: the Registers register is the fastest place to store, because all the other storage media of

Each function is used to complete a single function. A single function is easy to understand, test, and predict. Input to the output. During the design, functions are divided into query and command. Query function: only queries the object state

A long time ago, on a land filled with metaphor, an elephant (similar to the traditional development method) lived ). For many years, this loyal elephant has been the main food collector in the village where he lives, and is very clear about what

Pair programming is a very simple and intuitive concept: the two programmers sit side by side in front of the same computer to complete the same design. The same algorithm, the same code, or the same group of tests are compared to the independent

The only "BestPractice" does not use a variety of design methods, models, and frameworks summarized by our predecessors. many famous methods, models, and frameworks only support code, it does not mean that they are suitable for you. you should use

This keyword is often used in the definition of a class, so we can understand the role of this pointer in class definition. Global and static functions cannot use this. In fact, the first parameter of the member function is T * constthis by default.

The use of static classes is a controversial topic. some people even advocate not to use the scope qualifier on the class name. The debate on static features focuses on a design principle called IoC control inversion. The IoC design principle tries

Contractual programming is a programming method. So what is contractual programming? I think this concept has evolved from contract. In human social activities, a contract is generally used by two parties, one party (supplier) for the other party

I used to think that xx1, x1, and x are only different in writing representation methods. I didn't expect to study them carefully ....... From the process above, we can see that x is less of a write process than x1, while x1 is less of an addressing

Many universities include software development-related majors in engineering, which gives people the illusion that software development is also an engineering discipline, just like civil engineering and power machinery. However, this is

The most popular and simple way to write verification rules is regular expressions, but the only problem is that the syntax of regular expressions is too obscure, which makes it very painful. Many developers often use a small copy to remember the

Speaking of SingleTon, I believe that SingleTon is a well-known design pattern as long as you know the design pattern. This is a well-known design model, but it is the most abused design model. This article will discuss the abuse of SingleTon. First,

Refactoring is an operation that must be done to write code. It should also be something that programmers are willing to practice. Whether it is logical implementation or design process, or even the entire layered structure, we may face and

The bad taste of code refers to the warning signal of potential problems in the code. Not all bad taste indicators are indeed a problem, but it is necessary to check and modify most bad tastes. If you see the same program structure in more than one

Do you still remember the question about "Why use a function" when I first learned programming? That is, the repeated code is summarized into a function and used multiple times. There is no doubt that everyone is familiar with this, but is there any

It is also very important to fully understand the business knowledge. these automated things are designed to avoid repetitive wheel building and getting stuck in the ocean of underlying code. How to make the best wheel in the world, and how to use

Information is a very abstract concept. People often say that there is a lot of information, or there is little information, but it is hard to tell how much information there is. For example, the amount of information contained in a 0.5 million-word

Abstraction is to extract useful and essential features from a problem and then express the problem with a model that is concise but contains the same information. After a complex problem is abstracted, it may become a simple problem or a previously