unicode

In Go language development, string slicing is a high-frequency operation. Special attention needs to be paid to encoding issues, especially when dealing with mixed Chinese and English text. This article systematically organizes four mainstream string slicing methods in Go, analyzing technical points with code examples.

Unicode Safe Processing Method

Achieve character-level safe slicing through []rune conversion:

func main() {
    str := "Hello, 世界!"
    runes := []rune(str)
    
    // Character-level safe slicing
    sub3 := string(runes[7:9])
    fmt.Println("Safe Chinese slicing:", sub3) // Output: 世界
}

Technical Comparison:

Method	Time Complexity	Memory Overhead	Applicable Scenarios
Byte Slice	O(1)	Low	Pure ASCII strings
[]rune Conversion	O(n)	High	Strings containing multi-byte characters