Programming VIP

1. Introduction 1. What is GCD? The full name is Grand Central Dispatch Pure C language provides many powerful functions 2. Advantages of GCD GCD is Apple's solution for multi-core parallel computing GCD will automatically utilize more CPU cores (such as dual core and quad core) GCD automatical ...

List concept List is the most frequently used data type in Python. List can complete the data structure implementation of most collection classes.The list is identified with "[]". python is the most common composite data type, which supports characters, numbers, strings and even lists (so-called nesting).The value division in the list ...

Note the following points when removing comments in the code First, comments have multiple or single line comments from "/ *" to "* /" Second, there is a single line comment of "/ /" Also note that characters in double and single quotation marks are not included in comments So I designe ...

  Compared with other programming languages, Python has more diversified operation types. In particular, the asterisk (*), which is a widely used operator in Python, is not only used in the multiplication of two numbers. In this article, we will discuss the various uses of asterisks. The application scenarios of four kinds of asterisks are su ...

Content  match Match string begins, Match object is returned successfully, None is returned unsuccessfully, only one is matched. searchSearching in a string (not limited to the beginning), returning the Match object successfully, and returning None failed, matching only one. findall Find all grou ...

I created a database, such as'mydb'. CREATE DATABASE mydb CHARACTER SET utf8 COLLATE utf8_bin; CREATE USER 'myuser'@'%' IDENTIFIED BY PASSWORD '*HASH'; GRANT ALL ON mydb.* TO 'myuser'@'%'; GRANT ALL ON mydb TO 'myuser'@'%'; GRANT CREATE ON mydb TO 'myuser'@'%'; FLUSH PRIVILEGES; Now I can log in to the database from anywhere, but I can't ...

Basic Grammar By default, Python 3 source files are encoded in UTF-8, and all strings are unicode strings. Identifier: The first character must be an alphabet or underscore. The other parts are composed of letters, numbers and underscores. They are ...

SpringBook Integration AMQP (RabbitMQ) Adding pom dependencies <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-amqp</artifactId> </dependency> application.properties configuration spring.rabbitmq.host=***.***.***.*** spring.rabbitmq.port=5762 spring.rabbitm ...

  1.iterator iterator There are three functions of Iterator: one is to provide a unified and simple access interface for various data structures; the other is to enable members of the data structure to be arranged in a certain order; the third is that ES6 creates a new traversal command for...of lo ...

1. Preface RabbitMQ was actually the first MQ framework that I came into contact with. I remember that I went to the library to see it by myself when I was in college. Since the English of RabbitMQ website was not too difficult, it was also learned by referencing the website. There were six chapters, which were developed by Node at that time, a ...