How to remove a key from a map in Golang

In this tutorial, you will learn how to remove an existing key from a map in Golang

We use a built-in delete function to remove the key from the map.

It is always important to check if the key exists in the map to prevent panic.

Example

  package main

  func main () {
    simpleMap := make(map[int]string, 0)
    simpleMap[1] = "One"
    simpleMap[2] = "Two"

    // delete a key from the map
    // check if the key exists in the map
    // to prevent the program to raise a panic
    if _, ok := simpleMap[2]; ok {
      delete(simpleMap, 2)
    }
  }

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