Go Brain Teasers

Puzzle 24

Fun with Flags

flag.go

package main

import (
        "fmt"
)

type Flag int

func main() {
        var i interface{} = 3
        f := i.(Flag)
        fmt.Println(f)
}

Guess the Output
	Try to guess what the output is before moving to the next page.

This code will panic.

Even though Flag is basically an int, the Go compiler sees it as a distinct type, and the type assertion (i.(Flag)) will panic. This is another case where you can use ...