Tag: built-in

The use and partial analysis of Assert in SpringBoot’s built-in tool class

2023.10.29 update: Disadvantages of using assert: 1. The assert keyword needs to be explicitly enabled at runtime to take effect, otherwise your assertion will be meaningless. Currently, mainstream Java IDE tools do not enable the -ea assertion checking function by default. This means that if you use IDE tools to code, you will have some […]

[Django Development Manual] Using a custom user model in Django: a stronger choice than the built-in User

Foreword Django is a very popular Python web framework. Its built-in user authentication system can help us easily implement functions such as registration, login, and permission control. However, if you need to implement more functions, such as custom user attributes, or implement different user types (such as ordinary users and administrator users, etc.), using Django’s […]

Python operates MySQL, SQL injection issues, views, triggers, transactions, stored procedures, built-in functions, process control, indexes

1. Python operates MySQL Import third-party module: pymysql Operation steps (text description): 1. Connect to MySQL first host, port, username, password, charset, library, autocommit, etc. 2. Write SQL statements in python 3. Start executing the SQL statement and get the result 4. Processing in python (further processing of data) Code implementation: # 1. Link mysql […]

Implementation of self-built discrete Fourier transform matlab program and comparison example with matlab’s built-in functions

Examples of self-built discrete Fourier transform matlab program implementation and comparison with matlab’s built-in functions There is a built-in discrete Fourier transform program in matlab, namely the fft program, but the program is encapsulated and the source code cannot be seen. In order to have a clearer understanding of the implementation process that comes with […]

[QT reads JSON] Explain in simple terms how to use QT’s built-in QJson module to parse Json files. An ingenious work

Directory 0 Preface 1 Json data analysis 2 Parse Json data ?♂? Author: Haima007 Column: QT Column Title: [QT reads JSON] Use QT’s built-in QJson module to parse Json files Message: The meaning of life may be to realize your full potential, so go for it! Finally: The author of the article has limited skills […]

6 amazing built-in functions in Python

Life is short, learn Python for newbies! Today, we are here, and we will share 6 magical built-in functions at once. In many computer books, they are also usually introduced as higher-order functions. And in my daily work, I often use them to make code faster and easier to understand. Lambda function Lambda functions are […]

Bug resolved: Invariant Violation: Element type is invalid: expected a string (for built-in components) or

Blogger Maotouhu () takes you to Go to New World? Blog homepage: Maotouhu’s blog “Complete Column of Interview Questions” Articles with pictures and texts Vivid images Simple and easy to learn! Everyone is welcome to step in~ “IDEA Development Cheats Column” Learn the common operations of IDEA and double your work efficiency~ “Master Golang in […]

[Docker] Docker-Compose built-in DNS load balancing failure problem

Docker Compose implements load balancing Let’s slightly modify the previous example docker-compose.yml: version: “3.8” services: flask-demo: build: context: . dockerfile: Dockerfile image: flask-demo:latest environment: – REDIS_HOST=redis-server – REDIS_PASS=${REDIS_PASS} healthcheck: test: [“CMD”, “curl”, “-f”, “http://localhost:5000”] interval: 30s timeout: 3s retries: 3 start_period: 40s depends_on: -redis-server deploy: replicas: 3 networks: -backend -frontend redis-server: image: redis:latest command: redis-server […]