How can I trim whitespaces in Go from a slice after Split

Question

I have a string that is comma separated, so it could be test1, test2, test3 or test1,test2,test3 or test1, test2, test3.

I split this in Go currently with strings.Split(s, ","), but now I have a []string that can contain elements with an arbitrary numbers of whitespaces.

How can I easily trim them off? What is best practice here?

This is my current code

var property= os.Getenv(env.templateDirectories)
if property != "" {
    var dirs = strings.Split(property, ",")
    for index,ele := range dirs {
        dirs[index] = strings.TrimSpace(ele)
    }
    return dirs
}

I come from Java and assumed that there is a map/reduce etc functionality in Go also, therefore the question.

Answer 1

You can use strings.TrimSpace in a loop. If you want to preserve order too, the indexes can be used rather than values as the loop parameters:

Go Playground Example

EDIT: To see the code without the click:

package main

import (
    "fmt"
    "strings"
)

func main() {
    input := "test1,          test2,  test3"
    slc := strings.Split(input , ",")
    for i := range slc {
      slc[i] = strings.TrimSpace(slc[i])
    }
    fmt.Println(slc)
}