How to clear map in golang

Go language does not provide any functions or methods for clearing all elements of map. The only way to clear map is to make a new map , don’t worry about the efficiency of garbage collection. Parallel garbage collection in Go language is much more efficient than writing a clearing function.

Extension:

Method to delete map elements:

Go language provides a built-in function delete() for deleting elements in the container. Below we Let's briefly introduce how to use the delete() function to delete elements in the map.

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

delete(map, key)

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

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

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

The code output is as follows:

route 66
china 960

For more golang knowledge, please pay attention golang tutorial column.

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