It's because your method receivers are values, not pointers:
func (b Builder) setFirst() {
b.firstElement = "First element"
}
In Go, method receivers work a lot like regular function arguments. When
you call the above method, you're operating on a copy of the Builder
struct. Any time you pass an argument by value like this, its value is
copied. What you probably want is to define the method on a pointer
receiver:
func (b *Builder) setFirst() {
b.firstElement = "First element"
}
Now, when you call this method on an object, only the pointer is copied.
Inside the method, you're referring to the same Builder instance that you
are when calling the method.
On Sun, Dec 5, 2021 at 10:47 PM Денис Мухортов <muhortovdeni...@gmail.com>
wrote:
> I have 2 empty strings in the output. But why?
> https://play.golang.com/p/v7zEVBM17YH
>
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