Tech Articles
A Complete Guide to PostgreSQL’s 9 Index Types
PostgreSQL provides a rich variety of index types. Each index type is based on specific data structures and principles, and is suitable for different application scenarios. The following will provide a detailed introduction to these nine main index types.
Why Use a VARCHAR Field Instead of TEXT in MySQL
An in-depth look at how TEXT fields work and when to avoid them.
Best Practices for Python Code Style and Linting
The Python code style guide is not set in stone. It evolves continuously with the development of the language. Some old conventions are gradually phased out, and new ones keep emerging. At the same time, many projects have their own coding style guides. When there are conflicts, the project-specific guides should be followed first. However, there is an important principle to keep in mind: "The stupid persistence in consistency is the monster of ignorance", which is a profound insight from Guido. Since code is often read more frequently than it is written, the core goal of the style guide is to improve code readability and keep all kinds of Python code consistent. As PEP20 says, "Readability counts".
How Many Goroutines Can Go Run? A Deep Dive into Resource Limits
A guide to understanding and managing Goroutine resource consumption and safe concurrency in Go.
Understanding JSON Arrays of Arrays
A guide to using and handling JSON nested arrays effectively.
How to Write JSON to a File in Python
Writing JSON to files in Python using `json.dump()`.
How to Convert JSON to CSV: A Practical Guide
Convert structured JSON to flat, tabular CSV for analysis.
Why Python, Go and Rust Don’t Use the Ternary Operator
Exploring the design choices behind conditional expressions in modern languages.
Why MVC, MVP, and MVVM Remain the Best Architectural Patterns
MVC stands for Model View Controller, which is an abbreviation for model-view-controller. It is a widely applied software design paradigm. Its core idea is to organize the code by separating the business logic, data, and interface display, and centralize the business logic in one component. In this way, when improving and customizing the interface and user interaction, there is no need to rewrite the business logic. MVC has uniquely developed to map the traditional input, processing, and output functions into a logical graphical user interface structure.
How to Store JSON Data in Session Storage in Angular
Storing JSON in Angular session storage using services for better structure.
How to Convert JSON to Excel Using Microsoft Excel's Power Query
Convert JSON files into Excel tables using Power Query tools.
Understanding JSON Arrays: A Practical Guide
JSON arrays store ordered, mixed-type data for structured information exchange.
Why Modern Languages (Go, Rust) Prefer Composition Over Inheritance
A deep dive into inheritance pitfalls and how composition solves them in languages like Go, Rust, and even Java.
Advanced Python Concurrency: Multithreading and AsyncIO
This article has deeply explored multithreading programming and asynchronous programming in Python, covering the basic knowledge of the multithreading module (`threading`), code practice, as well as the basic concepts and usage of the asynchronous programming module (`asyncio`). We started from the basics of multithreading, such as the `Thread` class, lock mechanism, thread safety, etc., and gradually demonstrated the application scenarios and precautions of multithreading in practical applications. Through an example, the process of multithreaded image downloading was shown, emphasizing the importance of thread safety and exception handling.
Go's nil Is More Complicated Than You Think
In the practice of Go language programming, the use of `nil` is extremely common. For example, the default type is assigned as `nil`, the `error` return value often uses `return nil`, and multiple types use `if != nil` for judgment, etc. However, regarding the knowledge point of `nil`, developers need to have an in-depth understanding of its essence and related characteristics.
Python Advanced: A Journey with Abstract Base Classes
Today, we are going to explore Abstract Base Classes (ABCs) in Python. Although this concept has been around in Python for a long time, in daily development, especially in development scenarios related to LeapCell, many people may not use it frequently, or they may not use it in the most sophisticated way.
Boosting Python Performance with Rust: A Practical Guide
By using Rust to optimize Python code, computational performance can be significantly improved. Although Rust has a steeper learning curve, for projects that need to handle a large number of computational tasks, rewriting the key parts of the code in Rust can save a lot of time costs. You can gradually try to use Rust to optimize existing Python projects, starting with a simple functional function and gradually mastering its usage.
Getting Started with anyhow: A Practical Guide to Rust Error Handling
A practical guide to simplifying Rust error handling using the anyhow crate.
Monolith or Microservices? The Evolution of Architecture
Neither the monolithic nor the microservices architecture is a "cancer". Instead, they are technical choices in different historical stages and according to different business needs. In actual projects, factors such as business scale, team capabilities, and technical requirements should be comprehensively considered to select the architecture that is most suitable for the current development stage and maintain the flexibility and evolvability of the architecture.
How to Convert JSON to an HTML Table: A Comprehensive Guide
Simple methods to transform JSON into readable HTML tables.
How to Convert Parquet to JSON in Python
Convert Parquet to JSON easily in Python using Pandas, PyArrow, or DuckDB.
How to Open a JSON File: A Comprehensive Guide
Ways to open, view, and edit JSON files easily.
Choosing the Right Rust Error Handling Tool: anyhow, thiserror, or snafu?
An overview of Rust error handling tools: anyhow, thiserror, and snafu, with usage examples.
Node.js Logging Tools: A Detailed Analysis and Comparison
The rich logging tools in the Node.js ecosystem provide developers with a variety of choices, making it easy to implement logging functions in actual projects. However, choosing the right logging library is crucial. It is necessary to comprehensively consider factors such as the specific requirements of the application, performance requirements, deployment environment, and the complexity of log management. Developers should select a logging tool that can accurately record the required data, is easy to analyze and troubleshoot problems, and at the same time does not have too much impact on the application performance, so as to provide strong support for the stable operation and continuous optimization of the project.
Introduction to Redis CLI
Quick guide to using Redis CLI for server interaction and management.
Redis Commands: A Comprehensive Overview
Essential Redis commands for efficient data management and operations.
Getting Started with Redis and Python
Simple guide to using Redis efficiently with Python.
Thiserror: Effective Error Management in Rust
Learn how to simplify Rust error handling by creating custom errors with the thiserror crate.
Why Some Developers Prefer Go Without Generics
The introduction of Go generics is an important step in the development of the language, improving code reusability and type safety. However, compared with other languages, Go generics still have gaps in functionality and expressive power. The current design is more like a transitional solution and still needs further improvement in the future.
How to Show Databases in PostgreSQL
Different ways to list databases in PostgreSQL using CLI, SQL, or GUI tools.
Understanding PostgreSQL Data Types
PostgreSQL offers versatile, performance-driven data types for effective database design.
Understanding and Managing the PostgreSQL Port
Manage PostgreSQL ports safely by configuring, verifying, and securing connections.
Rust Essentials: Core Concepts and Practical Examples
Explore Rust’s unique approach to memory safety, concurrency, and efficient programming.
Deep Dive into Docker Images
As the foundation of containers, Docker images essentially represent the content of the container's file system. It is a read-only template used to create Docker containers. From a technical perspective, Docker images adopt a layered structure design. Except for the base image, other images are generated by overlaying new content on top of existing images. The metadata of each layer of the image is stored in a `json` file. This metadata not only describes the static content of the file system but also contains dynamic data information, such as the creation time of the image, build instructions, and so on.
How to List Users in PostgreSQL
Quick guide to listing and checking users in PostgreSQL.
How to Show Tables in PostgreSQL
Different ways to list PostgreSQL tables using `psql`, SQL, or GUI.
Understanding the MySQL `SUBSTRING()` Function
Extract specific text using MySQL `SUBSTRING()` for flexible data handling.
Rust Fundamentals Through 24 Minimal Examples
A quick dive into Rust’s key concepts, each explained with a short code snippet.
Next.js JWT Auth Made Easy: From Setup to Deployment
In modern web development, user authentication and authorization are core aspects of building secure applications. JSON Web Token (JWT), with its stateless, cross-platform, and lightweight characteristics, has become one of the most mainstream authentication solutions in front-end and back-end separated applications. As the most popular full-stack framework in the React ecosystem, Next.js provides a powerful middleware mechanism that can efficiently implement request interception and route protection. This article will delve into how to achieve user authentication in Next.js through custom middleware in combination with JWT, ensuring that the requests contain valid `userid` and `username`, and covering the entire process from basic principles to production-level practices.
How to Show All Users in MySQL
List all MySQL users using a simple SQL query with proper privileges.
Mastering MySQL INSERT: Techniques for Efficient Data Insertion
How to use MySQL INSERT efficiently and handle duplicates or large datasets.
Understanding and Resolving MySQL Error 1064
Fix SQL syntax issues to resolve MySQL Error 1064 quickly and reliably.
How to Create a Table in MySQL
Create structured, reliable tables using MySQL's `CREATE TABLE` syntax and constraints.
Mastering the MySQL UPDATE Statement: Syntax, Examples, and Best Practices
Safe and effective techniques for updating data with MySQL's `UPDATE` statement.
How to Use MySQL DATEDIFF() to Compare Dates
Compare two MySQL dates and get the day difference with `DATEDIFF()` function.
9 Rust Pitfalls Every Developer Should Know
A guide to common Rust coding mistakes and how to fix them
20 Years of Django: The Secret Behind Its Lasting Popularity
In 2025, the field of web development met a milestone——the Django framework officially marked its 20th anniversary. As the most influential full-stack web framework in the Python ecosystem, since the release of its first public version in 2005, Django has always adhered to the design philosophy of "batteries included" and has been driving a revolution in web development efficiency. This article will analyze the iterative path of Django's core functions along the timeline of its version evolution, and conduct technical comparisons with mainstream frameworks such as Ruby on Rails, Spring, and NestJS to showcase its continuously innovative technical genes.
A Deep Dive into Pattern Matching in Rust
A comprehensive guide to Rust’s powerful pattern matching syntax and its practical use cases.