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course/11-pointers/exercises/5-pointer_receiver/readme.md

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+# Pointer Receivers
+
+A receiver type on a method can be a pointer.
+
+Methods with pointer receivers can modify the value to which the receiver points. Since methods often need to modify their receiver, pointer receivers are *more common* than value receivers.
+
+## Pointer receiver
+
+```go
+type car struct {
+	color string
+}
+
+func (c *car) setColor(color string) {
+	c.color = color
+}
+
+func main() {
+	c := car{
+		color: "white",
+	}
+	c.setColor("blue")
+	fmt.Println(c.color)
+	// prints "blue"
+}
+```
+
+## Non-pointer receiver
+
+```go
+type car struct {
+	color string
+}
+
+func (c car) setColor(color string) {
+	c.color = color
+}
+
+func main() {
+	c := car{
+		color: "white",
+	}
+	c.setColor("blue")
+	fmt.Println(c.color)
+	// prints "white"
+}
+```