maps

package main

import "fmt"

func main() {
    m := make(map[string]int)
    m["k1"] = 7
    m["k2"] = 13
    fmt.Println("map:", m)

    v1 := m["k1"]
    fmt.Println("v1:", v1)
    fmt.Println("len:", len(m))

    delete(m, "k2")
    fmt.Println("map:", m)

    _, prs := m["k2"]
    fmt.Println("prs:", prs)

    n := map[string]int{"foo": 1, "bar": 2}
    fmt.Println("map", n)
}