go-strings

What problem does it solve?

Go developers often write inefficient or error-prone string handling routines. This skill provides guidance to write correct and efficient Go string code, covering rune semantics, iteration, trimming, conversion between string and []byte, and safe substring usage to avoid memory leaks.

Core Features & Use Cases

• Rune-aware string iteration: correctly range over strings to access runes rather than bytes.
• Efficient concatenation: prefer strings.Builder with pre-growth when total size is known.
• Substrings safety: avoid keeping large backing arrays by cloning substrings when storing them.
• Trim vs trim functions: choose TrimPrefix/TrimSuffix for fixed strings and TrimLeft/TrimRight/Trim for cutsets.
• Use-case example: refactor a function that concatenates 100 short strings into a single string efficiently without excessive allocations.

Quick Start

Refactor a Go function to use strings.Builder for efficient concatenation of a given slice of strings.