feat: pointers, runes, structs

go-by-example/structs/structs.go

@@ -0,0 +1,42 @@
+package main
+
+import "fmt"
+
+type person struct {
+	name string
+	age  int
+}
+
+func newPerson(name string) *person {
+	p := person{name: name}
+	p.age = 42
+	return &p
+}
+
+func main() {
+	fmt.Println(person{"Bob", 20})
+	fmt.Println(person{"Alice", 30})
+	// fmt.Println(person{"Fred"}) // will zero value age. Compiler don't like it actually.
+	fmt.Println(&person{"Ann", 40})
+	fmt.Println(newPerson("Jon"))
+
+	s := person{name: "Sean", age: 50}
+
+	fmt.Println(s.name)
+
+	sp := &s
+	fmt.Println(sp.age)
+
+	sp.age = 51
+	fmt.Println(sp.age)
+
+	// If a single use struct you can omit the decalre the struct type and just use it directly on the initialization.
+	dog := struct {
+		name   string
+		isGood bool
+	}{
+		"Mike",
+		true,
+	}
+	fmt.Println(dog)
+}