Solved

Sorting - Help needed

Posted on 2006-11-28
8
221 Views
Last Modified: 2010-03-05
My perl program parses data and outputs the relevant values I need into an array.
(code has a series of ifels conditions I check).

push (@array1,$var1, ",", $var2, ",", $var3, ",", $var4, ",", $var5, ",", $var6,"\n");


The output.csv file contains 6 columns, namely, var1, var2,....var6.
I need to sort my output.csv file first by $var4 and then by $var5. I would appreciate if you could:
1) Tell me what are the ways this can be achieved.

2) Code that would do this (with a brief explanation)


0
Comment
Question by:nathan_007
8 Comments
 
LVL 84

Expert Comment

by:ozo
ID: 18029316
while( <> ){
my ($var1, $var2, $var3, $var4, $var5, $var6) = split/,/;
push @array,"$var4\0$var5\0$var1, $var2, $var3,  $var4, $var5, $var6\n";
}
@array = map{/.*\0(.*)/s}sort @array;
print @array;

0
 

Author Comment

by:nathan_007
ID: 18031286
Thanks. In most cases $var4 and $var5 are 5 digit integers. However I enocuntered an issue when $var5 happened to be a 4 digit number.

10012, 3068 appeared after 10012, 10078

3068 needs to be as 03068 in the array.

How do I format $var4 and $var5 it in the array to be of 5 digits in length.....something similar to sprintf"%05d" ????
0
 
LVL 5

Expert Comment

by:Alkali_Guy
ID: 18031423
$var4 = "0".$var4 if (length($var4)==4);
0
Enterprise Mobility and BYOD For Dummies

Like “For Dummies” books, you can read this in whatever order you choose and learn about mobility and BYOD; and how to put a competitive mobile infrastructure in place. Developed for SMBs and large enterprises alike, you will find helpful use cases, planning, and implementation.

 

Author Comment

by:nathan_007
ID: 18031600
Alkali_Guy:
I agree that it works if the length is 4 digits. Is there a generic check I can do and round it to 5 digits assuming $var5 can be of length 1 or 2 or 3 or 4 or 5.
0
 
LVL 28

Accepted Solution

by:
FishMonger earned 50 total points
ID: 18032171
$var5 = sprintf("%05d", $var5);
0
 
LVL 84

Assisted Solution

by:ozo
ozo earned 50 total points
ID: 18032196
push @array,sprintf"%6d\0%6d\0%s\n",$var4,$var5,"$var1, $var2, $var3,  $var4, $var5, $var6";
0

Featured Post

3 Use Cases for Connected Systems

Our Dev teams are like yours. They’re continually cranking out code for new features/bugs fixes, testing, deploying, testing some more, responding to production monitoring events and more. It’s complex. So, we thought you’d like to see what’s working for us.

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 …
There are many situations when we need to display the data in sorted order. For example: Student details by name or by rank or by total marks etc. If you are working on data driven based projects then you will use sorting techniques very frequently.…
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…
This video shows how to use Hyena, from SystemTools Software, to bulk import 100 user accounts from an external text file. View in 1080p for best video quality.

770 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