How to find a character index in Golang?

Question

I'm trying to find "@" string character in Go but I cannot find a way to do it. I know how to index characters like "HELLO[1]" which would output "E". However I'm trying to find index number of the found char.

In Python I'd do it in following way:

x = "chars@arefun" split = x.find("@") chars = x[:split] arefun = x[split+1:]  >>>print split 5 >>>print chars chars >>>print arefun arefun 

So chars would return "chars" and arefun would return "arefun" while using "@" delimeter. I've been trying to find solution for hours and I cannot seem to find proper way to do it in Golang.

Answer 1

You can use the Index function of package strings

Playground: https://play.golang.org/p/_WaIKDWCec

package main  import "fmt" import "strings"  func main() {     x := "chars@arefun"      i := strings.Index(x, "@")     fmt.Println("Index: ", i)     if i > -1 {         chars := x[:i]         arefun := x[i+1:]         fmt.Println(chars)         fmt.Println(arefun)     } else {         fmt.Println("Index not found")         fmt.Println(x)     } } 

Answer 2

If you are searching for non-ASCII characters (languages other than english) you need to use http://golang.org/x/text/search.

func SubstringIndex(str string, substr string) (int, bool) {     m := search.New(language.English, search.IgnoreCase)     start, _ := m.IndexString(str, substr)     if start == -1 {         return start, false     }     return start, true }  index, found := SubstringIndex('Aarhus', 'Å'); if found {     fmt.Println("match starts at", index); } 

Search the language.Tag structs here to find the language you wish to search with or use language.Und if you are not sure.