Simple map exaple

maps/go.go

@@ -0,0 +1,38 @@
+package main
+
+import (
+	"fmt"
+)
+
+type Vertex struct {
+	X, Y float64
+}
+
+func main() {
+	m := make(map[string]Vertex)
+	m["hello world"] = Vertex{12.2, 32.22}
+	m["another place"] = Vertex{X: 12}
+	m["bilbo baggins"] = Vertex{}
+	fmt.Println(m)
+    delete(m, "bilbo baggins")
+    delete(m, "frodo baggins")
+    if v, ok := m["another place"]; ok {
+        fmt.Printf("%v %v\n", v, ok)
+    }
+    fmt.Printf("%v\n", m)
+
+    n := make(map[string]map[string]int)
+    my_name := "stephen m. mcquay"
+    n[my_name] = make(map[string]int)
+    n[my_name]["weight"] = 197
+    n[my_name]["age"] = 31
+    n["michael m. mcquay"] = map[string]int{"weight": 210, "age": 30}
+    fmt.Printf("%v\n", n)
+
+    for k := range n {
+        fmt.Printf("'%v'\n", k)
+    }
+    for k, v := range n {
+        fmt.Printf("'%v' : %v\n", k, v)
+    }
+}