How Do I Delete Keys from Maps in Go?

Deleting Keys in Maps: A Solution for Go

When dealing with maps in Go, the issue of removing keys arises. A common misconception is to assign nil to the desired key, as exemplified by the following unsuccessful attempt:

sessions[key] = nil, false;

Evolution in Go's Map Manipulation

In Go version 1, a significant change was made to map handling. The special syntax for deleting map entries was removed, giving way to a straightforward solution: the delete function.

Using the delete Function

The delete function takes two parameters: a map and a key. It removes the map entry corresponding to the specified key. For instance:

package main

func main() {
    var sessions = map[string]chan int{}
    delete(sessions, "moo")
}

This code effectively deletes the entry with the key "moo" from the sessions map.

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