This is the only solution, as far, that solves the general problem of repeating lines not only consecutive repeating lines ++. Just fix the name of the hash, now you use two: %read_lines and %read for what should be one I think.

A compression (broquaint based): 

perl -ni -e 'print if $seen{$_}; $seen{$_} = 1' your_file

[download]

In reply to Re: Re: Removing repeated lines from file by zby
in thread Removing repeated lines from file by matth

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