You could just reverse the order of the lines in the file...

use strict;
use warnings;

my @lines = reverse(<DATA>);

[download]

This will read the entire file into RAM. No problem for 100 kBytes, big trouble for big files (larger than free RAM). The solutions from choroba, Grandfather, eyepopslikeamosquito, and the second solution from tybalt89 do not suffer from that problem, because they all read only one line at a time.

Alexander

--
Today I will gladly share my knowledge and experience, for there are no sweeter words than "I told you so". ;-)

In reply to Re^2: How can I keep the first occurrence from duplicated strings? by afoken
in thread How can I keep the first occurrence from duplicated strings? by Anonymous Monk

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