[golang] deletion and emptying of map elements in golang

When we want to put a map When the element is completely empty

You can directly assign a new map In the past ,Go There is nothing in the language for map Provide any function that empties all elements 、 Method , Empty map The only way is to re make A new map, Don't worry about the efficiency of garbage collection ,Go Parallel garbage collection in the language is much more efficient than writing an empty function .

Use delete() Function from map Delete key value pairs in

Use delete() Built in functions from map Delete a set of key value pairs in ,delete() The format of the function is as follows ：

delete(map, key )