String, rune slice. In Golang we often use strings to store character data. But rune slices have many advantages—they treat characters in a more consistent way.
For Unicode characters, a rune slice can be used to append and modify characters with no errors. If we act on a string directly, we can cause problems here.
Modify runes example. A string contains runes (these are characters). We can convert a string to a slice of runes. Then we can modify runes or add new ones.
And We create a new string from the modified rune slice. This is character-based string manipulation in Go.
Detail In this Golang program we modify the first character in a string, and then add a fourth character to the end.
package main
import "fmt"
func main() {
original := "cat"
fmt.Println(original)
// Get rune slice.// ... Modify the slice's data.
r := []rune(original)
r[0] = 'm';
r = append(r, 'e')
// Create new string from modified slice.
result := string(r)
fmt.Println(result)
}cat
mate
Substrings, notes. Rune slices are also ideal for acquiring substrings from a string. This supports Unicode characters with no risk of data corruption.
A summary. Converting a string to a rune slice in Golang is a common operation. It leads to code that will be less likely to corrupt Unicode characters.
Dot Net Perls is a collection of tested code examples. Pages are continually updated to stay current, with code correctness a top priority.
Sam Allen is passionate about computer languages. In the past, his work has been recommended by Apple and Microsoft and he has studied computers at a selective university in the United States.
This page was last updated on Oct 8, 2022 (image).
