#!/usr/bin/perl -w use strict; use warnings; my @folders=("inc","Inc","iNc","incr","src","Src"); my $mk = "./media/common/max/tail/common.mk: $(PROJECT_ROOT)/../../Utils/inC"; my $folder_match; my @folder_match; foreach $folder_match(@folders) { if($mk !~ /^\/\Q$folder_match\E$/i)# if $mk doesnot match to anyone of @folders,then only push { push @folder_match ,$mk; } } print "@folder_match\n";