Set and decrease for counter
Modify the code of
makeCounter() so that the counter can also decrease and set the number:
counter()should return the next number (as before).
counter.set(value)should set the
counter.decrease()should decrease the
See the sandbox code for the complete usage example.
P.S. You can use either a closure or the function property to keep the current count. Or write both variants.
The solution uses
count in the local variable, but addition methods are written right into the
counter. They share the same outer lexical environment and also can access the current