Design patterns are an important concept in software development that provides proven solutions to common and repetitive problems such as object creation, organizational structure, and change handling. Using design patterns can improve readability, reusability, and extensibility while avoiding common mistakes and bad smells. However, design patterns are not a panacea, and it is important to choose and use them wisely to avoid over-design and misuse of patterns.
Reduce global dependencies.
Global dependencies reduce readability, testability, and maintainability, increasing coupling and error rates. In order to avoid global dependencies, we should write ** that relies on local state and parameter passing, limit the scope of variables and instances, pass data through the parameters and return values of functions, and avoid using global variables or instances. In addition, it is also important to write functions without *** to make the functions purer and more reliable.
Continuous refactoring. Refactoring is the adjustment of the internal structure of software in order to improve comprehensibility and reduce the cost of modification without changing the observable behavior of the software. Continuous refactoring is carried out throughout the software development process to adapt to changes in requirements and to maintain clarity and flexibility. The benefits of continuous refactoring include improved maintainability and scalability, reduced technical debt, and avoidance of quality and design degradation.
Safety is a top priority.
Security is the primary task of software development, which is related to the function, performance, reputation and legal responsibility of the software. Written security is to avoid common security vulnerabilities such as SQL injection, cross-site scripting (XSS), data breaches, etc., which can lead to data loss, tampering, leakage, and even system crash or being controlled by malicious people. Especially for financial applications, security is even more crucial, because it involves sensitive information such as users' property, privacy, and credit. In order to write a safe **, we should follow the following principles:
Use secure programming languages and frameworks to provide built-in security mechanisms and tools, such as precompiled SQL statements, input validation, encryption and decryption, etc., to prevent or mitigate some common attacks.
Enhance security and trustworthiness by using secure coding conventions and conventions, such as avoiding dynamic SQL statements, filtering and escaping user input, using the HTTPS protocol, using secure hashing algorithms and salt values, etc.
Use security testing methods and tools, such as static analysis, dynamic analysis, penetration testing, etc., to detect and fix security vulnerabilities in the world, as well as use some professional security tools, such as OWASP Zap, NMAP, Metasploit, etc., to simulate and defend against some common attacks.
By judiciously using design patterns, reducing global dependencies, continuous refactoring, and focusing on security, we can improve the quality and trustworthiness of software development and provide users with more reliable and secure software products.