A solution similar to yours in style: 

use v6;
print join ' ', reverse .words for
    lines.grep(/SRC1/)\
         .map({ [+<<.words[*-1, 0], $_]})\
         .sort\
         .map(*[2])

[download]

And a version using feeds (note that feeds support in Rakudo is still somewhat lacking and experimental, but this one works:) 

use v6;

lines()
==> grep(/SRC1/)
==> map({ [+<<.words[*-1, 0], $_]})
==> sort()
==> map(*[2])
==> my @lines;

print ~.words.reverse for @lines;

[download]

And here is another solution: 

class Line {
    has $.str handles 'words';
    method Str { self.words.reverse.join(' ') }
}
multi infix:<cmp>(Line $a, Line $b) {
    $a.words[*-1] <=> $b.words[*-1]
        || $a.words[0] <=> $b.words[0];
}


print lines().map({Line.new(str => $_)}).grep(/SRC1/).sort;

[download]

(Which admittedly doesn't do the Schwartz Transform).

(Update: added second version, tested and fixed third version)

Perl 6 - the future is here, just unevenly distributed

In reply to Re: Perl 6 implementation of the following Perl 5 code by moritz
in thread Perl 6 implementation of the following Perl 5 code by konnjuta

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