Objective-C Message Forwarding: 3 Stages
One of the most common lines in iOS crash logs is unrecognized selector sent to instance.
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Follow the trail from foundational concepts to practical engineering decisions.
[AI User Guide #1] ChatGPT is not a search engine: How AI generates answers
When you ask ChatGPT something and receive an answer, it is easy to assume that it found a stored correct answer and showed it to you—like finding a document after entering a query in Naver or Google. But AI does not work that way. This misunderstanding leads to confusing experiences such as “AI lied” or “AI keeps changing its answer”…
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[Free Service #1] Fixing AI Designs with Agentation
Asking AI to build a website is easy now. The real struggle starts afterward—when you show the finished screen and say, “This button looks a little odd.”
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Swift Middleware: Decorator + Chain of Responsibility
When building a network layer, you inevitably hit moments like this.
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[Swift Philosophy #1] Safe · Fast · Expressive
When writing Swift, you eventually wonder: Why are optionals so strict? Why are arrays copied? Why does guard exist? Digging into these questions leads to Swift’s three original goals: Safe, Fast, and Expressive.
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