ProgramGuruTo clear all key-value pairs from a map in Go, you can reinitialize the map or delete each key individually using a loop. Both methods effectively empty the map.
We can clear all key-value pairs from a map in Go by reinitializing the map, which removes all elements from the map.
For example,
myMap with some key-value pairs. In this example, the map has string keys and integer values.myMap.fmt.Println function to verify that the map is empty.package main
import "fmt"
func main() {
// Declare and initialize a map
myMap := map[string]int{
"one": 1,
"two": 2,
"three": 3,
}
// Clear all key-value pairs by reinitializing the map
myMap = make(map[string]int)
// Print the contents of the map
fmt.Println(myMap)
}map[]
We can reinitialize an already empty map in Go, and it will still be empty.
For example,
myMap. In this example, the map has string keys and integer values.myMap.fmt.Println function to verify that the map is still empty.package main
import "fmt"
func main() {
// Declare and initialize an empty map
myMap := map[string]int{}
// Clear the map by reinitializing it
myMap = make(map[string]int)
// Print the contents of the map
fmt.Println(myMap)
}map[]
We can delete each key individually from a map to clear all key-value pairs in Go.
For example,
myMap and inserting some key-value pairs into it. In this example, the map has string keys and integer values.delete function.fmt.Println function to verify that the map is empty.package main
import "fmt"
func main() {
// Declare and initialize a map
myMap := map[string]int{
"one": 1,
"two": 2,
"three": 3,
}
// Clear the map by deleting each key individually
for key := range myMap {
delete(myMap, key)
}
// Print the contents of the map
fmt.Println(myMap)
}map[]
In this tutorial, we learned How to Clear All Key-Value Pairs from a Map in Go language with well detailed examples.