test$ grep '#/INT' dir1list.pl -A1 -B3
          }
          my $rule = Path::Iterator::Rule->new;
          if ($id =~ /^([0-9A-F]{2})/) {
            $rule->and( sub { m#/INT $1# } );
          }

##</code><code>##

test$ ./dir1list.pl --listing TheList/INTERRUP.LST --source source --find --summary --link 21.58
From "[Link command line switch]": Hyperlink selected: INT 21/AH=58h
Found: "INT 21 - DOS 2.11+ - GET OR SET MEMORY ALLOCATION STRATEGY (AH=58h/AL=00h,01h)"
Use of uninitialized value $1 in regexp compilation at ./dir1list.pl line 1166, <$array_lstff[...]> line 125.
Searching file INT 20 DOS 1 TERMINATE PROGRAM.txt
Use of uninitialized value $1 in regexp compilation at ./dir1list.pl line 1166.
Searching file INT 2158 DOS 211 GET OR SET MEMORY ALLOCATION STRATEGY.txt
source/Interrupt List/INT 21 DOS Function Calls/INT 2158 DOS 211 GET OR SET MEMORY ALLOCATION STRATEGY.txt
Found: "INT 21 - DOS 5+ - GET OR SET UMB LINK STATE (AH=58h/AL=02h,03h)"
Use of uninitialized value $1 in regexp compilation at ./dir1list.pl line 1166, <$array_lstff[...]> line 323.
Searching file INT 20 DOS 1 TERMINATE PROGRAM.txt
Use of uninitialized value $1 in regexp compilation at ./dir1list.pl line 1166.
Searching file INT 2158 DOS 211 GET OR SET MEMORY ALLOCATION STRATEGY.txt
Use of uninitialized value $1 in regexp compilation at ./dir1list.pl line 1166.
Searching file INT 2158 DOS 5 GET OR SET UMB LINK STATE.txt
source/Interrupt List/INT 21 DOS Function Calls/INT 2158 DOS 5 GET OR SET UMB LINK STATE.txt

##</code><code>##

test$ grep '#/INT' minuslst.pl -A1 -B3
          my $rule = Path::Iterator::Rule->new;
          if ($id =~ /^([0-9A-F]{2})/) {
            my $int - $1;
            $rule->and( sub { m#/INT $int# } );
          }

##</code><code>##

test$ ./minuslst.pl --listing TheList/INTERRUP.LST --source source --find --summary --link 21.58
Useless use of subtraction (-) in void context at ./minuslst.pl line 1166.
From "[Link command line switch]": Hyperlink selected: INT 21/AH=58h
Found: "INT 21 - DOS 2.11+ - GET OR SET MEMORY ALLOCATION STRATEGY (AH=58h/AL=00h,01h)"
Use of uninitialized value $int in subtraction (-) at ./minuslst.pl line 1166, <$array_lstff[...]> line 125.
Use of uninitialized value $int in regexp compilation at ./minuslst.pl line 1167, <$array_lstff[...]> line 125.
Searching file INT 20 DOS 1 TERMINATE PROGRAM.txt
Use of uninitialized value $int in regexp compilation at ./minuslst.pl line 1167.
Searching file INT 2158 DOS 211 GET OR SET MEMORY ALLOCATION STRATEGY.txt
source/Interrupt List/INT 21 DOS Function Calls/INT 2158 DOS 211 GET OR SET MEMORY ALLOCATION STRATEGY.txt
Found: "INT 21 - DOS 5+ - GET OR SET UMB LINK STATE (AH=58h/AL=02h,03h)"
Use of uninitialized value $int in subtraction (-) at ./minuslst.pl line 1166, <$array_lstff[...]> line 323.
Use of uninitialized value $int in regexp compilation at ./minuslst.pl line 1167, <$array_lstff[...]> line 323.
Searching file INT 20 DOS 1 TERMINATE PROGRAM.txt
Use of uninitialized value $int in regexp compilation at ./minuslst.pl line 1167.
Searching file INT 2158 DOS 211 GET OR SET MEMORY ALLOCATION STRATEGY.txt
Use of uninitialized value $int in regexp compilation at ./minuslst.pl line 1167.
Searching file INT 2158 DOS 5 GET OR SET UMB LINK STATE.txt
source/Interrupt List/INT 21 DOS Function Calls/INT 2158 DOS 5 GET OR SET UMB LINK STATE.txt

##</code><code>##

test$ grep '#/INT' dirlist.pl -A1 -B3
          my $rule = Path::Iterator::Rule->new;
          if ($id =~ /^([0-9A-F]{2})/) {
            my $int = $1;
            $rule->and( sub { m#/INT $int# } );
          }

##</code><code>##

test$ ./dirlist.pl --listing TheList/INTERRUP.LST --source source --find --summary --link 21.58
From "[Link command line switch]": Hyperlink selected: INT 21/AH=58h
Found: "INT 21 - DOS 2.11+ - GET OR SET MEMORY ALLOCATION STRATEGY (AH=58h/AL=00h,01h)"
Searching file INT 2158 DOS 211 GET OR SET MEMORY ALLOCATION STRATEGY.txt
source/Interrupt List/INT 21 DOS Function Calls/INT 2158 DOS 211 GET OR SET MEMORY ALLOCATION STRATEGY.txt
Found: "INT 21 - DOS 5+ - GET OR SET UMB LINK STATE (AH=58h/AL=02h,03h)"
Searching file INT 2158 DOS 211 GET OR SET MEMORY ALLOCATION STRATEGY.txt
Searching file INT 2158 DOS 5 GET OR SET UMB LINK STATE.txt
source/Interrupt List/INT 21 DOS Function Calls/INT 2158 DOS 5 GET OR SET UMB LINK STATE.txt
test$