i have two tab delimited files. i want to match 204508_a_st in one file to 204508_A_ST in the other. 
open INDAT, "file1" or die "$!";
my @array;
my @probes;
while (<INDAT>){
        @array=split/\t/;
        open INCOMP, "file2" or die "$!";
        while (<INCOMP>){
                @probes=split/\t/;

                if ($array[0]=~/$probes[1]/i){
                        print $probes[1];#or whatever else 
                        }
               }
         close INCOMP;
         }

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if i use the array entry probes1 it doesn't work, but if i assign a variable to the same exact value 204508_A_ST and use that instead, it does. is there something i am missing regarding the array probes entry?

In reply to beginner regex question by natoikos

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