Re: Adding Columns from Given Data

[tedrek]

This gives the final result I think you want:

my @oldlist = map {chomp; $_} <DATA>;

my @sorted = map {$_->[2] . " " . $_->[1]}
             sort {($a->[2] cmp $b->[2]) || ($b->[1] cmp $a->[1])}
             map { [split] } @oldlist;
my @newlist = map {shift(@oldlist) . ' ' . $_} @sorted;

print join "\n", @newlist;
__DATA__
a1 p1 q5
a1 p1 q6
a1 p2 q4
a2 p3 q9
a2 p2 q8
a2 p2 q9

__OUTPUT__
a1 p1 q5 q4 p2
a1 p1 q6 q5 p1
a1 p2 q4 q6 p1
a2 p3 q9 q8 p2
a2 p2 q8 q9 p3
a2 p2 q9 q9 p2

HTH

Update: Forgot to mention my output is different from yours, I think it was a typo in your sample output, looking at your sample input.

[artist]

Thanks tedrek for the excellent code, I slightly modified because I like to 'sort' within account block

my @oldlist = map {chomp; $_} <DATA>;

my @sorted = map {$_->[2] . " " . $_->[1]}
             sort {($a->[0] cmp $b->[0]) || 
                   ($a->[2] cmp $b->[2]) || 
                   ($b->[1] cmp $a->[1])}
             map { [split] } @oldlist;

#print join "\n", @sorted,"\n";

my @newlist = map {shift(@oldlist) . ' ' . $_} @sorted;
print (join ("\t", split),"\n") for @newlist;
__DATA__
a1 p1 qX5
a1 p1 q6
a1 p2 q4
a2 p3 q9
a2 p2 q8
a2 p2 q9

_OUTPUT__
a1    p1    qX5    q4    p2
a1    p1    q6    q6    p1
a1    p2    q4    qX5    p1
a2    p3    q9    q8    p2
a2    p2    q8    q9    p3
a2    p2    q9    q9    p2

Notice that 'qX5' remains within the given block of account (a1).

artist