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)
    }
}