38 lines
655 B
Go
38 lines
655 B
Go
package greetings
|
|
|
|
import (
|
|
"errors"
|
|
"fmt"
|
|
"math/rand"
|
|
)
|
|
|
|
func Hello(name string) (string, error) {
|
|
if name == "" {
|
|
return name, errors.New("empty name")
|
|
}
|
|
message := fmt.Sprintf(randomFormat(), name)
|
|
return message, nil
|
|
}
|
|
|
|
func Hellos(names []string) (map[string]string, error) {
|
|
messages := make(map[string]string)
|
|
for _, name := range names {
|
|
message, err := Hello(name)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
messages[name] = message
|
|
}
|
|
return messages, nil
|
|
}
|
|
|
|
func randomFormat() string {
|
|
formats := []string{
|
|
"Hi, %v. Welcome!",
|
|
"Great to see you, %v!",
|
|
"Hail, %v! Well met!",
|
|
}
|
|
|
|
return formats[rand.Intn(len(formats))]
|
|
}
|