01 Joe
02 Ed
03 Sam
04 Wendy

##</code><code>##

yadda 01 abc
yadda 03 sss
yadda 02 asdsdbc
yadda 02 adfgbc
yadda 01 abgxvc
yadda 02 azdfbc
yadda 04 azdfbc
yadda 04 abdc

##</code><code>##

foreach (@transactions) { #there are dozens of employee numbers…
	if ($_ eq 01) { 	push (@joe , $_) ; }
	if ($_ eq 02) { 	push (@ed , $_) ; }
	if ($_ eq 03) { 	push (@sam , $_) ; }
	if ($_ eq 04) { 	push (@sam , $_) ; }
	if (no others) { 	push (@unregistered , $_) ; }
}

##</code><code>##

foreach (@transactions) {
	push (@the_correct_employee’s_array_based_on_number , $_) ;
}