splice( keys(%mh), 0, 100 ) ;

##</code><code>##

Type of arg 1 to splice must be array (not keys) at myprog.pl line 36, near "100)"
Compilation failed in require at ./test.pl line 8.
BEGIN failed--compilation aborted at ./test.pl line 8.

##</code><code>##

my @k = keys(%mh) ;
splice( @k ...) ;