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LeetCode #345 in Go: reverse vowels of a string, and how strings, bytes, and runes work in Go
Why I started this series A while back, I went through a job interview that included a coding challenge. It looked pretty easy, so I finished in like 90 seconds, and all tests passed! Then, the (non-t
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Ahmet Özel
AI Engineer. Computer Vision, RAG and LLM agents.
The constraint-first choice between []byte and []rune is exactly the right lesson. One additional boundary is that a rune is a Unicode code point, not necessarily a user-perceived character: combining marks and emoji sequences can still span multiple runes. For this ASCII problem []byte is both simpler and faster; for production text, the requirement should say whether it operates on bytes, code points, or grapheme clusters. That specification matters more than choosing the most Unicode-looking type.