Time for you to reread what has been presented already and engage your brain to solve the problem. Strong hint: $snpLookup{$1} = $2; puts the value you want into the %snpLookup hash and in print "$1    $2\n"; $1 contains the key.

Perl is environmentally friendly - it saves trees

In reply to Re^6: Searching Huge files by GrandFather
in thread Searching Huge files by biomonk

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