Number: 015, Date: 2025-04-21

2025.04.14 ~ 2025.04.20

📱 Resolution Units Summary

While developing with Flutter, I briefly reviewed resolution differences by OS to determine whether the UI differences between Android and iOS are due to OS-level resolution systems.

• Resolution: The total number of pixels displayed on the screen.
• Pixel Density (ppi, pixels per inch): A key factor that determines screen sharpness — the number of pixels per inch.
• Device Pixel Ratio (DPR)

Unit systems in Android and iOS

Android: DP (dots per inch)

iOS: PT (points)

Links

• Device Information Reference Site
• dp to px Conversion Tool
• Resolution
• DesignPick

🧮 Efficient and Stable iOS Code Architecture: Functional & Declarative Programming Paradigms - Session 4

I began attending a 5-week offline course hosted by FastCampus titled Efficient and Stable iOS Code Architecture. The topic of the course is functional & declarative programming. - Course Introduction Link

Summary of Session 4

• Based on the MVVM architecture, values from network or data layers are processed in the ViewModel using immutability and pure functions.
• Complex business logic is separated in a functional style to ensure predictable state and ease of testing.
• A blog with extensive information about functional programming

🙋🏻‍♂️ Other Notes

1. Sites to check the tech stack used by different companies:
   • StackShare
   • Codenary
2. A site with well-written AI explanations in Korean:
   • apidog Blog
3. Recently, “vibe coding” is gaining traction. I used the Figma MCP + Cursor combo to build a React project from a simple image-and-text-based website. After a few tweaks, it successfully met the basic requirements.