Exercises & activities from the go workshop provided by Packt: https://courses.packtpub.com/courses/go
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29 lines
444 B
29 lines
444 B
package main
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import (
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"errors"
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"fmt"
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)
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func doubler(v interface{}) (string, error) {
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if i, ok := v.(int); ok {
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return fmt.Sprint(i * 2), nil
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}
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if s, ok := v.(string); ok {
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return s + s, nil
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}
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return "", errors.New("unsupported type passed")
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}
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func main() {
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res, _ := doubler(5)
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fmt.Println("5 :", res)
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res, _ = doubler("yum")
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fmt.Println("yum:", res)
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_, err := doubler(true)
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fmt.Println("true:", err)
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}
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