David Byrne wrote:
> Hello,
>
> I'm trying to map two files INPUT1 to INPUT2. I
> believe that I've made a syntax error somewhere
> because I'm not retrieving any ouput; yet I know that
> there are IDs in INPUT2 (via $id2) that exist in
> INPUT1 (via $id_1b).
>
> Also, is there a general, more efficient, way to map
> files that contain similar identifier strings?
Depending on the size, you can use a hash from one file as a key and then read
the other file and report using the key if exists, etc to do your print out. Do it
all the time when looking for dups. If any doubt on case of data, then either lc or
uc the keys to make sure there is a hit.
Wags ;)
>
> Thank you for any advice,
> David
>
> foreach $line2 (<INPUT2>) {
> ($id2,$remainder) = split(/\t/,$line2,2);
> foreach $line1 (<INPUT1>) {
> ($id_1a,$id_1b) = split (/\t/,$line1,2);
> chomp($id_1b);
> if ($id2 eq $id_1b) {
> print OUTPUT "$id2\t$id_1a\t$remainder";
> } else {
> next;
> }
> }
> }
>
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