Golang : Extract unicode string from another unicode string example
Problem:
You have a string with unicode (UTF-8) characters and you want to extract part of the string by using character indexing. However, the output result is weird. What is the correct way to extract unicode (UTF-8) characters from a string?
Solution:
Wrap the string with []rune
, then index the characters and finally the convert the rune bytes to string.
Here you go!
package main
import "fmt"
func main() {
// wrong way
fmt.Println("fuß is german language for foot"[1])
// wrong way
fmt.Println(string("fuß is german language for foot"[1]))
// correct way
fmt.Println(string([]rune("fuß is german language for foot")[0:3]))
// correct way
fmt.Println(string([]rune("腳 is chinese language for foot")[0:1]))
}
Output:
117
u
fuß
腳
alternatively, you can use the strings.SplitN()
function as well.
package main
import (
"fmt"
"strings"
)
func main() {
str := "腳 is chinese language for foot"
// extract each word from str
parts := strings.SplitN(str, " ", -1)
fmt.Println(parts[0])
fmt.Println(parts[1])
fmt.Println(parts[2])
fmt.Println(parts[3])
fmt.Println(parts[4])
fmt.Println(parts[5])
}
Output:
腳
is
chinese
language
for
foot
Happy coding!
References:
https://golang.org/ref/spec#Index_expressions
https://www.socketloop.com/tutorials/golang-get-first-few-and-last-few-characters-from-string
https://www.socketloop.com/tutorials/golang-extract-sub-strings
See also : Golang : Get first few and last few characters from string
By Adam Ng
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