Golang : How to delete element(data) from map ?

Problem :

You need to delete some elements from a map.

Such as:

cities := map[string]string{ "city1":"New York", "city2":"Adelaide" };

and remove element "city2" from cities map

Solution :

Use the Golang's builtin function

 delete(m, k)  // remove element m[k] from map m

For example :

 package main

 import "fmt"

 func main() {
 cities := map[string]string{"city1": "New York", "city2": "Adelaide"}

 fmt.Println("Before : ", cities) // before delete

 delete(cities, "city2")

 fmt.Println("After : ", cities) // after delete
 }

Output :

Before : map[city1:New York city2:Adelaide]

After : map[city1:New York]

References :

Deletion of map elements