Golang: How can I write a map which is mixed with string and array?

Question

I am a beginner of Go. I wrote this code, but an error occurred. How should I write a map which contains string and []string properties?

package main

import (
    "fmt"
)

func main() {
    prof := make(map[string]map[string]interface{})

    prof["me"] = map[string]string{
        "name":       "John Lennon",
        "email":      "[email protected]",
        "phone":      "090-0000-0000",
        "occupation": []string{"Programmer", "System Engineer"},
        "language": []string{"Go", "Java", "Python", "PHP", "JavaScript", "SQL"},
        "hobby": []string{"Photography", "Traveling", "Fishing", "Eating"},
    }

    fmt.Println(prof)

}

This error is from Ideone.

# _/home/NcWlmE
./prog.go:14: cannot use []string literal (type []string) as type string in map value
./prog.go:15: cannot use []string literal (type []string) as type string in map value
./prog.go:16: cannot use []string literal (type []string) as type string in map value

When using interface{}, you have to cast your values back. Also, in your case defining a struct is preferable (Go is not JS). — T. Claverie
– T. Claverie, Commented Jun 10, 2016 at 12:14

cnicutar · Accepted Answer · 2016-06-10 11:43:13Z

10

You're assigning the wrong kind of map. Try:

prof["me"] = map[string]interface{}{
                        ^^^^^^^^^^^ instead of string

answered Jun 10, 2016 at 11:43

cnicutar

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3 Comments

yamachan Over a year ago

Thank you. I also noticed my mistake after I posted this. Thank you for your reply.

yamachan Over a year ago

10 minutes later, I will click "check mark". Thank you.

cnicutar Over a year ago

@yamachan Nothing beats rubber duck debugging!

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