[MCP·Skill #2] AI Agent Skills Explained: From Slash Commands to Automatic Triggers
When using AI coding tools, you often repeat the same instructions: “Use this format for commit messages” or “Follow this checklist before deployment.”
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Follow the trail from foundational concepts to practical engineering decisions.
Shallow vs. Deep Copy: Up to Swift COW
Reference, shallow, and deep copies differ in how much newly created data they duplicate. This article explains the pitfalls of reference types inside Swift value types and how Copy-on-Write preserves independent copies.
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[Swift Basics #4] Using guard to flatten the pyramid of doom
Swift guard handles failure conditions first and keeps the happy path flat. Verify its compiler guarantees over if, optional-binding scope, and when to choose return, throw, or continue with runnable examples.
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Swift Flyweight Pattern: Save Memory by Sharing Objects
When building an app, you may need to create thousands or tens of thousands of similar objects. A typical example is placing tens of thousands of markers on a map, where the memory graph can easily keep climbing.
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Implement Undo with the Swift Command Pattern
When building an app, requests to “just add an undo button” come up more often than you might expect.
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