package main
import (
"fmt"
"strings"
)
func main() {
reg := [...]string {"a","b","c"}
fmt.Println(strings.Join(reg,","))
}
gives me an error of:
prog.go:10: cannot use reg (type [3]string) as type []string in argument to strings.Join
Is there a more direct/better way than looping and adding to a var?
The title of your question is:
How to join a slice of strings into a single string?
but in fact, reg is not a slice, but a length-three array. [...]string is just syntactic sugar for (in this case) [3]string.
To get an actual slice, you should write:
reg := []string{"a", "b", "c"}
and then you'll find that your code for joining it works perfectly:
fmt.Println(strings.Join(reg, ","))
(Try it out: https://play.golang.org/p/vqU5VtDilJ.)
Incidentally, if you ever really do need to join an array of strings into a single string, you can get a slice from the array by adding [:], like so:
fmt.Println(strings.Join(reg[:], ","))
(Try it out: https://play.golang.org/p/zy8KyC8OTuJ.)
Use a slice, not an arrray. Just create it using
reg := []string {"a","b","c"}
An alternative would have been to convert your array to a slice when joining :
fmt.Println(strings.Join(reg[:],","))
Read the Go blog about the differences between slices and arrays.
To String
import "strings"
stringFiles := strings.Join(fileSlice[:], ",")
Back to Slice again
import "strings"
fileSlice := strings.Split(stringFiles, ",")
