SQL statements are used to interact with a database. Data Definition Language (DDL) involves creating, altering, and dropping database structures. Data Manipulation Language (DML) is used for managing data, while Transaction Control (TCL) manages changes made by DML. Data Control Language (DCL) manages access permissions and privileges. In a library database use case, these statements are applied to manage book information.
HTTP Methods
The Internet comprises interconnected devices globally, with HTTP as an application-layer protocol for transferring hypertext requests and information. It operates over TCP/IP, using port 80, and employs stateless communication. Its methods include GET, POST, PUT, DELETE, PATCH, HEAD, OPTIONS, TRACE, and CONNECT. HTTPS is the secure version, providing encryption for sensitive data.
ASDF: The Best Version Management
Various version management tools are used in software development. NVM for Node.js, RVM for Ruby, and Pyenv for Python. However, ASDF stands out as a versatile, unified solution for multiple languages and tools.
DRY: Don’t Repeat Yourself
The DRY principle, or "Don't Repeat Yourself," promotes code reusability for maintainable, readable, and efficient software systems. While beneficial, it requires judicious application to avoid complexity and trade-offs.
KISS: Keep It Simple, Stupid
The KISS principle, or "Keep It Simple, Stupid," promotes straightforward and easy-to-understand solutions in design and decision-making, offering advantages such as improved understanding, reduced errors, faster development, lower maintenance costs, and scalability. However, it should be applied judiciously.
YAGNI: You Aren’t Gonna Need It
YAGNI, or "You Aren't Gonna Need It," is a software development principle advocating for simplicity and minimalism. It advises against adding unnecessary features to prevent complexity and wasted effort.
Code Review
Peer code review involves fellow developers reviewing each other's code before merging it. It enhances code quality, fosters collaboration, and identifies security issues. The process includes submitting, selecting reviewers, feedback, reviewing, and learning from the review. It is crucial to set clear expectations, be constructive, conduct reviews promptly, use tools, rotate roles, and document the process. The SMART strategy can guide the establishment of review goals for improved outcomes in project management and personal development.
Scalability: Vertical, Horizontal, and Hybrid
Vertical Scaling (Scale-Up) involves adding resources to existing servers for low traffic, while Horizontal Scaling (Scale-Out) adds servers for high traffic, offering redundancy and scalability. Consider cost, flexibility, and redundancy when choosing.
SOA: Service Oriented Architecture
Service-oriented architecture (SOA) enables reusable software components using common interfaces, offering benefits such as faster time to market, reduced costs, and ease of maintenance. It includes three roles: service provider, broker/registry, and requester. SOA differs from microservices in its enterprise-wide approach and dependency on middleware. It also contrasts with SaaS, as it offers web services via service providers.
Monolith, Microservices, Mono-Repo
A monolith is a self-contained software system with scalability, agility, maintenance, and fault isolation challenges. Microservices offer solutions, but bring complexity, versioning issues, testing complexities, and code sharing challenges. In contrast, a Mono Repo simplifies management, promotes collaboration, dependency management, testing, code sharing, refactoring, and discovery, though it may lead to coupling, complex CI/CD, performance issues, and broken master situations.
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