Maps / Maps with slices as values / Essential Go
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package main
import (
"fmt"
)
func main() {
m := make(map[string][]int)
fmt.Printf("Non-existing key returns zero value of []int, i.e. nil: %#v\n", m["key1"])
m["key1"] = append(m["key1"], 8)
m["key1"] = append(m["key1"], 3)
fmt.Printf("\nAfter appending to slice: %#v\n", m["key1"])
delete(m, "key1")
fmt.Printf("\ndelete() sets back to nil slice: %#v\n", m["key1"])
}
Go
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