Go Brain Teasers

Puzzle 2

Empty-Handed

empty_map.go

package main

import (
        "fmt"
)

func main() {
        var m map[string]int
        fmt.Println(m["errors"])
}

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

This code will print: 0

The zero value for an uninitialized map is nil. Some operations on Go’s map type are nil safe, meaning they will work with a nil map without panicking.

Both len and accessing a value ...