Example
- It has it
package main import "fmt" // Go supports methods defined on struct types. type rect struct { width, height int } // This area method has a receiver type of *rect. func (r *rect) area() int { return r.width * r.height } // Methods can be defined for either pointer or value receiver types. Here’s // an example of a value receiver. func (r rect) perim() int { return 2*r.width + 2*r.height } func main() { r := rect{width: 10, height: 5} // Here we call the 2 methods defined for our struct. fmt.Println("area: ", r.area()) fmt.Println("perim:", r.perim()) // Go automatically handles conversion between values and pointers for // method calls. You may want to use a pointer receiver type to avoid // copying on method calls or to allow the method to mutate the receiving // struct. rp := &r fmt.Println("area: ", rp.area()) fmt.Println("perim:", rp.perim()) }
area: 50 perim: 30 area: 50 perim: 30