Get element of Array after last split in GO

I don't know if the title is clearly, i will explain my problem,

I have this piece of code :

package main

import (
	"fmt"
)

func main() {
	s := "test-email-test@gmail.com"
	fields := []string{}

	last := 0
	for i, r := range s {
		if r == '_' || r == '-' {
			fmt.Printf("%q\n", fields)
			fields = append(fields, s[last:i+1])

			last = i + 1

		}
	}
	fmt.Printf("%q\n", fields)


}

This code prints this :

["test-" "email-"]

But i don't know how can I put in the same time the last word, "test" in the same array, so that it gives :

["test-" "email-" "test"]

Anyone has idea please ?

Thanks a lot

I'm not entirely sure what the end goal is, but if it is to get a list of fields separated by - or _ in the username part of an email address, you may want to just use strings.Split and strings.FieldsFunc.

You can just Split on @ to get the username part, then use FieldsFunc to get the fields.

package main

import (
	"fmt"
	"strings"
)

func main() {
	s := "aaa-bbb-ccc@yyy.zzz"
	user := strings.Split(s, "@")[0] // get the username part
	fields := strings.FieldsFunc(user, func(c rune) bool {
		return c == '-' || c == '_'
	})
	fmt.Println(fields)
}

playground

Your criteria to cut a string is to find a certain char. The last piece does not match this rule except if you use a string like “a-b-c-“

Advice: check if there is something after last and append it after the for-loop

your loop will run correctly if there is "-" before the "@"
for alternative you may use

s := string("test-email-test@gmail.com")

fields := []string{}

name := strings.Split(s, "@") //separate from the "@"

name2 := strings.Split(name[0], "-") //separate from the "-"

for i := 0; i < len(name2); i++ {
	fields = append(fields, name2[i])
}

fmt.Println(fields)

output

[test email test]