Go Premium for a chance to win a PS4. Enter to Win

x
?
Solved

sorting one array, matching the second one

Posted on 2009-03-30
7
Medium Priority
?
173 Views
Last Modified: 2012-05-06
I have two arrays of strings, the left one needs to be natural sorted, I can do this however array2 has to be modified to maintain the index consistency.

@array1   @array2
1 --> b      1 --> bla
2 --> d      2 --> bla2
3 --> a1    3 --> bla3
4 --> a10  4 --> bla4
5 --> a20  5 --> bla5
6 --> a2    6 --> bla6

1 --> a1    1 --> bla3
2 --> a2    2 --> bla6
3 --> a10  3 --> bla4
4 --> a20  4 --> bla5
5 --> b      5 --> bla
6 --> d      6 --> bla2

i'm using a modified version of tye algorithm found on perkmonkey site for the natsort on array1 but then how would I order array2.

my @sorted = @list[
    map { unpack "N", substr($_,-4) }
    sort
    map {
        my $key = $list[$_];
        $key =~ s[(\d+)][ pack "N", $1 ]ge;
        $key . pack "N", $_
    } 0..$#list
];

Would you use a two dimensional array instead?
I want to make sure i'm doing this the most efficient way as the list can get long, any help appreciated
0
Comment
Question by:NewtonianB
  • 4
  • 3
7 Comments
 
LVL 39

Expert Comment

by:Adam314
ID: 24021882
I think a 2D array (or actually an array-of-arrays) would be better.  Here is an example:

my @array1 = (qw(b d a1 a10 a20 a2));
my @array2 = (qw(bla bla2 bla3 bla4 bla5 bla6));
 
##### Build array of array
my @AoA;
for(my $i=0; $i<=$#array1; $i++) {
	push @AoA, [$array1[$i], $array2[$i]];
}
 
##### Sort
my @AoA_sorted = sort {$a->[0] cmp $b->[0]} @AoA;
 
##### get original arrays, but sorted
@array1 = map{$_->[0]} @AoA_sorted;
@array2 = map{$_->[1]} @AoA_sorted;

Open in new window

0
 

Author Comment

by:NewtonianB
ID: 24022150
Thanks Adam! but It needs to be natural sorted instead of sort which is what's creating my complication, how would I use the above natural sorting algorithm or another one with your code
example of proper sort: a1 b1 a10 b1 b20  instead of  a1 a10 b1 b20
0
 

Author Comment

by:NewtonianB
ID: 24022460
i meant for example a1 a2 a3 a10 a12  instead of  a1 a10 a12 a2 a3
0
Technology Partners: We Want Your Opinion!

We value your feedback.

Take our survey and automatically be enter to win anyone of the following:
Yeti Cooler, Amazon eGift Card, and Movie eGift Card!

 
LVL 39

Accepted Solution

by:
Adam314 earned 2000 total points
ID: 24022640

##### Build array of array
my @AoA;
for(my $i=0; $i<=$#array1; $i++) {
	my $key = $array1[$i];
	$key =~ s/(\d+)/pack "N", $1/ge;
	push @AoA, [$key, $array1[$i], $array2[$i]];
}
 
##### Sort
my @AoA_sorted = sort {$a->[0] cmp $b->[0]} @AoA;
 
##### get original arrays, but sorted
@array1 = map{$_->[1]} @AoA_sorted;
@array2 = map{$_->[2]} @AoA_sorted;

Open in new window

0
 

Author Comment

by:NewtonianB
ID: 24023289
that should work! thanks!

Last quick question,
What's the most efficient way to get a 2Dimensional array consisting of the last two columns of array AoA_sorted?

could i just do something like
my @arrayTwoDim = map{$_->[1], $_->[2]} @AoA_sorted;
0
 
LVL 39

Assisted Solution

by:Adam314
Adam314 earned 2000 total points
ID: 24023543
If you want to make a new @arrayTwoDim (you need the extra square brackets):
    my @arrayTwoDim = map{[$_->[1], $_->[2]]} @AoA_sorted;

If you want to change @AoA_sorted:
    shift @$_ foreach (@AoA_sorted);
0
 

Author Closing Comment

by:NewtonianB
ID: 31564469
I could not have asked for a better help. Thank you so much!
0

Featured Post

Concerto Cloud for Software Providers & ISVs

Can Concerto Cloud Services help you focus on evolving your application offerings, while delivering the best cloud experience to your customers? From DevOps to revenue models and customer support, the answer is yes!

Learn how Concerto can help you.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

On Microsoft Windows, if  when you click or type the name of a .pl file, you get an error "is not recognized as an internal or external command, operable program or batch file", then this means you do not have the .pl file extension associated with …
Email validation in proper way is  very important validation required in any web pages. This code is self explainable except that Regular Expression which I used for pattern matching. I originally published as a thread on my website : http://www…
Explain concepts important to validation of email addresses with regular expressions. Applies to most languages/tools that uses regular expressions. Consider email address RFCs: Look at HTML5 form input element (with type=email) regex pattern: T…
Six Sigma Control Plans

877 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question