In order to enable this feature, a Set schema will define an optional hash key, which defines how its elements are hashed/indexed. Map Schemas¶ You can define Map schemas by adding a member variable of type
By creating a hashtable and providing it to the command using the @ symbol in front of the name of the hashtable instead of our normal variable $ sign, all the items in the hashtable will be added to the command as parameters. Keys will become parameter names and the values will be ...