What is the best way to check whether a certain value is in a string slice? I would use a Set in other languages, but Go doesn't have one.

My best try is this so far:

package main

import "fmt"

func main() {
    list := []string{"a", "b", "x"}
    fmt.Println(isValueInList("b", list))
    fmt.Println(isValueInList("z", list))
}

func isValueInList(value string, list []string) bool {
    for _, v := range list {
        if v == value {
            return true
        }
    }
    return false
}

http://play.golang.org/p/gkwMz5j09n

This solution should be ok for small slices, but what to do for slices with many elements?

set go slice
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