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// run
// Copyright 2018 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
package main
import (
"fmt"
)
func f(a []byte) ([]byte, []byte) {
return a, []byte("abc")
}
func g(a []byte) ([]byte, string) {
return a, "abc"
}
func h(m map[int]int) (map[int]int, int) {
return m, 0
}
func main() {
a := []byte{1, 2, 3}
n := copy(f(a))
fmt.Println(n, a)
b := []byte{1, 2, 3}
n = copy(g(b))
fmt.Println(n, b)
m := map[int]int{0: 0}
fmt.Println(len(m))
delete(h(m))
fmt.Println(len(m))
}