keys

       keys() - return an array of the keys from the (key, value)
       pairs in a mapping

SYNOPSYS

       mixed *keys( mapping m );

DESCRIPTION

       keys() returns an array of keys (indices) corresponding to
       the  keys  in the (key, value) pairs stored in the mapping
       m.

       For example, if:

              mapping m;
              m = (["hp" : 35, "sp" : 42, "mass" : 100]);

       then

              keys(m) == ({"hp", "sp", "mass"})

       Note: the keys will not be returned in any apparent order.
       However,  they  will  be returned in the same order as the
       corresponding values (returned by the values() efun).

SEE ALSO

       values(3), each(3)