Memo mode of design mode

scene Protect the integrity of the saved state of these objects and the internal implementation from being exposed You need to store the state externally on the premise of getting the state. So that at some point, you can restore your previous state. role There are three conventional roles: Originator: primitive state class Memo: a specific ...

Posted by omelin on Sat, 07 Dec 2019 19:08:52 -0800

Variables and function return values in Python functions

1. Variable of function Local and global variables: Any variable in Python has a specific scope Variables defined in a function can only be used inside the function, and those variables that can only be used in specific parts of the program are called local variables Variables defined at the top of a file can be called by any function in the fi ...

Posted by cactus on Sat, 07 Dec 2019 18:27:45 -0800

[C + +] 35 μ function object analysis

customer demand Write a function Function to get the value of each term of Fibonacci series Return one value per call Functions can be reused as needed Programming experiment: the first solution #include <iostream> using namespace std; int fib() { static int a0 = 0; static int a1 = 1; int ret = a1; a1 = a0 ...

Posted by garry27 on Sat, 07 Dec 2019 17:35:05 -0800

Summary of Chapter 3 of UNIX Linux programming practice course

Under Linux, everything is a file, so the directory is only a special file. It can be opened, read, and close just like the file, but the function is changed to opendir(),readdir(),closedir() Data structure used to read directory file -- struct directory #include <dirent.h> struct dirent { ino_t d_ino; /* Ino ...

Posted by akufen on Sat, 07 Dec 2019 17:00:31 -0800

Function corrilization -- six pulse sword

Are you in? It should be. by the way, there's no six pulse sword here, or even it can't compete with the six pulse sword. But the title of this blog post is called this. It's not changed. What's more? Back to the main topic, the functions in javascript are curried, and many articles on the Internet are written in various ways, even with fancy s ...

Posted by Sulman on Sat, 07 Dec 2019 16:36:41 -0800

Bidirectional queue, KMP algorithm, clue binary tree

Insertion and deletion of two-way queue insert Assign a value to the new node first New->pre = My; New->next = My->next; Modify the front and back nodes My->next->pre = New; My->next = New; New - > next = my - > next; and my - > next - > pre = new; positions can be changed. This changes to the front ...

Posted by lhaynes on Sat, 07 Dec 2019 16:30:02 -0800

Efficient string splicing in Go language

+ number splicing This kind of splicing is the simplest and easiest for us to use, because it is not limited to programming languages, such as Go language, Java, and they are + operators, which are calculated at runtime. var s string s+="Nickname?"+":"+"Zhiqiang 1224"+"\n" s+="Contact information QQ"+":"+"354662600"+"\n" fmt.Println(s) fmt spl ...

Posted by dan90joe on Sat, 07 Dec 2019 11:18:54 -0800

Analysis of Mybatis plug-in

Preface MyBatis provides a powerful extension function, that is, the plugins function of MyBatis. MyBatis allows you to intercept and call at a point during the execution of mapped statements. After interception, you can add some customized functions to existing methods, such as common page splitting functions. When you try to modify or rewrit ...

Posted by mayanktalwar1988 on Sat, 07 Dec 2019 10:25:58 -0800

Why do I recommend Python as a second language for the front end?

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 ...

Posted by dape2009 on Sat, 07 Dec 2019 07:19:50 -0800

Talk about the functional functional components in Vue.js

The Vue.js component provides a functional switch. When set to true, the component can become a stateless and instance free functional component. Because it's just a function, rendering costs are relatively small. The Render function in the functional component provides the second parameter context as the context. data, prop ...

Posted by goldages05 on Sat, 07 Dec 2019 07:16:46 -0800