=> Print with one element
@map[7, test]: 1
=> Print after zero:
@map[7, test]: 0
=> Print top 2:
@map[4]: 9999
@map[897123]: 9997
=> Using printf:
9999 + 1
=> Print all map:
@map[4]: 9999
@map[897123]: 9997
@map[5]: 42
@map[7, test]: 2
=> Print after clear: