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I've recently had some experience with function pointers in C. So, continuing with the tradition of answering your own questions, I decided to make some basic summaries for those who need to learn the topic quickly. #1 building Another good use of function pointers: Easy to switch versions When you need different functions at dif ...

Based on Boost 1.69, this article cuts out some deprecated or different configured code blocks that are not related to the topic of this article when displaying the source code. Service type resolving service socket/file operation timer ... service resolution Here, take the reactive socket service that provides services around reactor as an e ...

(I) use scenarios Usually in the ordered numbers, find a number that meets certain conditions Multiple questions It needs to be traversed many times and has a large amount of data (II) basic process Determine the boundary (low, high) value To determine the boundary moving condition, write only one side moving (low=mid hig ...

Differences between Nio and IO The original IO is flow oriented and blocking, while NIO is block oriented and non blocking. 1. Each time an IO stream reads one or more bytes from the stream until all the bytes are read, they are not cached in other places. In addition, the IO stream cannot move the data in the stream. If it is necessary to move ...

Of course, most Spring Boot programs in the world are Web programs. If you look away from the Web and zoom into the whole program world, you will surely see that the console program is a more basic and extensive kind of program. Console programs written in Java can also enjoy the benefits of Spring Boot. To develop a console program based on Sp ...

I wrote before An article , sharing the methods of interface management in their own projects. The conclusion is: define interface file -- with Axios export -- call interface method. In this way, the unified management of the interface and the semantics and simplifications of the calling interface are realized.   According to the use in the p ...

Reference source: Vitu.AI Today, let's look at the use of Boolean. Boolean types in Python are represented by two constants, True and False. x = True print(x) print(type(x)) Unlike the example above, which assigns True to x, we usually don't put True and False directly in the code, but get the Boolean value through some operational comparison, ...

stay Custom View for Android Development (1) The most complex custom View is explained in, and the rest two are finished this time ~ ~ ~ go,go,go Inherit the original control and modify it based on the original control, such as TextView, which is common and simple. This is explained by implementing a TextView example that displays ...

Given a string s and some words of the same length. Find out the starting position of a substring in s that can be formed by concatenating all words in words.Note that the substring should exactly match the words in the words, and there should be no other characters in the middle, but the sequence of words in the words should not be considered. ...

Preface The text and pictures of this article are from the Internet, only for learning and communication, not for any commercial purpose. The copyright belongs to the original author. If you have any questions, please contact us in time for handling. Author: front-end counselor PS: if you need Python learning materials, you can click the link b ...