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go_tour_notes [2018/04/14 08:46]
rpjday [Call-by-value]
go_tour_notes [2018/04/14 08:49]
rpjday [Refresher: call-by-value]
Line 719: Line 719:
 </​code>​ </​code>​
  
 +==== Refresher: pointer-based function ====
  
 +Pointer-based call:
 +
 +<​code>​
 +package main
 +
 +import (
 +        "​fmt"​
 +)
 +
 +type Vertex struct {
 +        X, Y float64
 +}
 +
 +func Scale(v *Vertex, f float64) {
 +        v.X = v.X * f
 +        v.Y = v.Y * f
 +}
 +
 +func main() {
 +        v := Vertex{3, 4}
 +        fmt.Println(v)
 +        Scale(&​v,​ 10)
 +        fmt.Println(v)
 +}
 +
 +{3 4}
 +{30 40}
 +</​code>​
go_tour_notes.txt ยท Last modified: 2018/04/14 08:57 by rpjday