How to delete elements in map with go language

This article mainly explains "how to delete elements in map with go language". The content of the explanation is simple and clear, and it is easy to learn and understand. Please follow the editor's train of thought to study and learn "how to delete elements in map with go language".

Go language to delete map elements: 1, use the delete () function to delete key-value pairs from map, syntax "delete (map, key)"; 2, by re-make a new map to clear all elements in map.

Go language removes elements from map

Use the delete () function to remove key-value pairs from map

The Go language provides a built-in function, delete (), to delete elements within the container.

Use the delete () built-in function to delete a set of key-value pairs from map. The format of the delete () function is as follows:

Delete (map, key)

Where map is the map instance to be deleted, and the key is the key of the key-value pair in the map to be deleted.

Deleting a set of key-value pairs from map can be done with the following code:

Scene: = make (map [string] int) / / prepare map data scene ["route"] = 66scene ["brazil"] = 4scene ["china"] = 960delete (scene, "brazil") for k, v: = range scene {fmt.Println (k, v)}

The code output is as follows:

Route 66china 960

In this example, the delete () function is used to remove brazil from the map of scene.

Clear all elements in the map

Interestingly, the Go language does not provide any functions or methods for map to empty all elements. The only way to empty map is to re-make a new map. Do not worry about the efficiency of garbage collection. Parallel garbage collection in Go language is much more efficient than writing an emptying function.

Thank you for your reading. the above is the content of "how to delete elements in map with go language". After the study of this article, I believe you have a deeper understanding of how to delete elements in map with go language, and the specific use needs to be verified in practice. Here is, the editor will push for you more related knowledge points of the article, welcome to follow!