This is similar to Cristoforo's solution but using a sort of Schwartzian Transform to sort the keys for the %seen hash.

knoppix@Microknoppix:~$ perl -E '
> open my $inFH, q{<}, \ <<EOD or die qq{open: <<HEREDOC: $!\n};
> d_145_1_2- + c_3_1_8-e_74_1_1-
> a_100_1_6-c_2_1_6- + b_50_1_2-
> c_69_1_17- + b_61_6_1-
> c_2_1_2- + a_123_1_1-
> d_83_1_1- + c_2_1_5-d_162_1_1-
> c_2_1_2- + a_123_1_1-
> a_123_1_1- + c_2_1_2-
> EOD
> 
> my %seen;
> print
>    map  { qq{$_->[ 0 ]\n} }
>    grep { ! $seen{ $_->[ 1 ] } ++ }
>    map  { chomp; [ $_, join( q{:}, sort split m{ \+ }, $_ ) ] }
>    <$inFH>;'
d_145_1_2- + c_3_1_8-e_74_1_1-
a_100_1_6-c_2_1_6- + b_50_1_2-
c_69_1_17- + b_61_6_1-
c_2_1_2- + a_123_1_1-
d_83_1_1- + c_2_1_5-d_162_1_1-
knoppix@Microknoppix:~$

[download]

I hope this is of interest.

Cheers,

JohnGG

In reply to Re: xtracting unique lines by johngg
in thread xtracting unique lines by anasuya

Title:
Use:  <p> text here (a paragraph) </p>
and:  <code> code here </code>
to format your post, it's "PerlMonks-approved HTML":


  • Posts are HTML formatted. Put <p> </p> tags around your paragraphs. Put <code> </code> tags around your code and data!
  • Titles consisting of a single word are discouraged, and in most cases are disallowed outright.
  • Read Where should I post X? if you're not absolutely sure you're posting in the right place.
  • Please read these before you post! —
  • Posts may use any of the Perl Monks Approved HTML tags:
    a, abbr, b, big, blockquote, br, caption, center, col, colgroup, dd, del, details, div, dl, dt, em, font, h1, h2, h3, h4, h5, h6, hr, i, ins, li, ol, p, pre, readmore, small, span, spoiler, strike, strong, sub, summary, sup, table, tbody, td, tfoot, th, thead, tr, tt, u, ul, wbr
  • You may need to use entities for some characters, as follows. (Exception: Within code tags, you can put the characters literally.)
            For:     Use:
    & &amp;
    < &lt;
    > &gt;
    [ &#91;
    ] &#93;
  • Link using PerlMonks shortcuts! What shortcuts can I use for linking?
  • See Writeup Formatting Tips and other pages linked from there for more info.