map.go

package main

import "fmt"

func main() {
	f := fmt.Printf
	var employees map[string]string
	f("%#v\n", employees)
	f("No. of pairs : %d\n", len(employees))
	f("The value for key %q is %q\n", "Dan", employees["Dan"])

	var accounts map[string]float64
	f("%#v\n", accounts["0x323"])

	var m1 map[[5]int]string
	_ = m1

	people := map[string]float64{}
	people["John"] = 21.4
	people["Mary"] = 10

	fmt.Println(people)

	map1 := make(map[int]int)
	map1[4] = 8

	balances := map[string]float64{
		"USD": 323.11,
		"EUR": 432.13,
		"CHF": 3243.1,
	}
	fmt.Println(balances)

	m := map[int]int{1: 10, 2: 20, 3: 30}
	_ = m

	balances["USD"] = 500.2
	balances["GBP"] = 100
	fmt.Println(balances)
	fmt.Println(balances["RON"])

	balances["RON"] = 0
	v, ok := balances["RON"]

	if ok {
		fmt.Println("The RON balance is:", v)
	} else {
		fmt.Println("The RON key doesn't exist in the map!")
	}

	for k, v := range balances {
		fmt.Printf("Key: %#v, Value: %#v\n", k, v)
	}

	delete(balances, "USD")
	fmt.Println(balances)
}