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

  See also : Golang : Check if element exist in map

By Adam Ng

IF you gain some knowledge or the information here solved your programming problem. Please consider donating to the less fortunate or some charities that you like. Apart from donation, planting trees, volunteering or reducing your carbon footprint will be great too.