Curriculum Types & methods Methods exercise 3 · mcq
Methods
Given a method declared with a POINTER receiver:
``go
func (c *Counter) bump() { c.n++ }
`
How do you CALL bump on a regular Counter value c`? Pick
the form that works — Go's auto-addressing rules let you call
pointer-receiver methods through a value, but only when the
value is addressable.
TypeScript reference
About this theme
Methods are functions with a receiver — a special argument declared before the function name: func (r Receiver) Foo() { ... }. Two flavours: value receivers (operate on a copy) and pointer receivers (operate on the original). The rule of thumb: use a pointer receiver if you'd modify the receiver, or if the receiver is large enough that copying is wasteful.