Pointers / Pointer vs. value methods / Essential Go
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package main
import "fmt"
type Foo struct {
Bar int
}
func (f *Foo) Increment() {
f.Bar++
}
func main() {
var f Foo
// Calling `f.Increment` is automatically changed to `(&f).Increment` by the compiler.
f = Foo{}
fmt.Printf("f.Bar is %d\n", f.Bar)
f.Increment()
fmt.Printf("f.Bar is %d\n", f.Bar)
// As you can see, calling `(&f).Increment` directly does the same thing.
f = Foo{}
fmt.Printf("f.Bar is %d\n", f.Bar)
(&f).Increment()
fmt.Printf("f.Bar is %d\n", f.Bar)
}
Go
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