Go Tutorial: & - Pass by Reference

pointers_test.go

// https://stackoverflow.com/questions/33242850/in-golang-what-is-the-difference-between-and
type TestCase struct {
	arg  string
	want string
}
func TestHello(t *testing.T) {
	testcase1 := &TestCase{
		arg:  "original arg val",
		want: "original want val",
	}
	fmt.Println(">> testcase1.arg:", testcase1.arg)
	testcase2 := testcase1
	testcase1.arg = "changed arg val"
	fmt.Println(">> testcase2.arg:", testcase2.arg)
}

// Output:
>> testcase1.arg: original arg val
>> testcase2.arg: changed arg val

Observe:

testcase1 := &TestCase{
	arg:  "original arg val",
	want: "original want val",
}

is the same as:

testcase1 := &TestCase{"original arg val", "original want val"}