http://blog.youkuaiyun.com/v_JULY_v/article/details/6256463
package main
import (
"fmt"
)
func main() {
m := make(map[string]int)
m["123"] = 1
m["13333"] = 2
for k,v := range m {
fmt.Printf("%s %d\n", k, v)
}
if _,ok := m["1"]; ok {
fmt.Println("found key");
} else {
fmt.Println("not found");
}
delete(m, "123")
}