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Perl sorting

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# 1  
Old 03-15-2010
Perl sorting
Hi,
I have a file in this format:
a b c d e
a b c d e
a b c d e

i need perl script to sort 2nd column in alphabatical order

The script i use is
Code:
#!/usr/bin/perl

my @words=<>;



foreach(sort mysort @words) {

 print;

}



sub mysort {



 lc($a) cmp lc($b);



}


This script sort the first column. What should i do to sort the second column.

Thanks
# 2  
Old 03-15-2010
MySQL
You can use the following command for sorting the data by second column.

Code:
sort -t ' ' -k 2 Data.txt

Input
a b c
c b s
a a c
a c e
f f d
c d g

Output
a a c
a b c
c b s
a c e
c d g
f f d
# 3  
Old 03-15-2010
is this homework?
you need to split into columns if you don't want to use
the first reply to your thread.
i.e. you need to extract the second column from $a and $b before you cmp
# 4  
Old 03-15-2010
Thanks for reply,
I know how to do with sort -k2 file but i want to try with perl
Quote:
Originally Posted by ungalnanban
You can use the following command for sorting the data by second column.

Code:
sort -t ' ' -k 2 Data.txt

Input
a b c
c b s
a a c
a c e
f f d
c d g

Output
a a c
a b c
c b s
a c e
c d g
f f d


---------- Post updated at 11:39 AM ---------- Previous update was at 11:38 AM ----------

No not homework. Trying to learn different things in unix

i will try split and let u know in 4 hrs if that work or not

Thanks for reply
Quote:
Originally Posted by bigearsbilly
is this homework?
you need to split into columns if you don't want to use
the first reply to your thread.
i.e. you need to extract the second column from $a and $b before you cmp
# 5  
Old 03-22-2010
summink like:


Code:
 

cat:$perl -e 'print sort {(split " ", $a)[4] <=> (split " ", $b)[4]} (qx/ls -l/)' 
total 52996
-rw-r--r--  1 michalejackson michalejackson        0 Feb 16 12:39 a2_FP4Hzh
-rw-r--r--  1 michalejackson michalejackson        0 Feb 16 09:47 a2_MbRNml
-rw-r--r--  1 michalejackson michalejackson        0 Feb 16 12:39 a2_eJXzSY
-rw-rw-r--  1 nagios      nagios             0 Feb  8 16:29 service_perfdata
-rw-r--r--  1 nagios      nagios            98 Mar 22 10:01 wrapper.log
-rw-------  1 root        root             622 Mar 17 15:00 etherXXXXkGKzPg
drwx------  2 michalejackson michalejackson     4096 Feb  9 09:52 mc-michalejackson
drwxr-xr-x 12 michalejackson michalejackson     4096 Mar 11 11:35 ntools
drwxr-xr-x  2 michalejackson michalejackson     4096 Mar 11 11:31 p
drwxr-xr-x  8 michalejackson michalejackson     4096 Feb 24 12:46 pdk-michalejackson
-rw-------  1 michalejackson michalejackson    11379 Feb 15 17:20 OHdX99GtwS
-rw-------  1 michalejackson michalejackson    12288 Feb 15 14:13 grab_xml_structure.pl.swp
-rw-------  1 michalejackson michalejackson    23369 Mar  8 15:27 3vAI5C1pq0
-rw-------  1 root        root           98016 Mar 17 14:56 etherXXXXcv3NYF
-rw-------  1 root        root          111207 Mar 17 14:36 etherXXXXDC5v7g
-rw-r--r--  1 nagios      nagios        236075 Mar 22 10:02 fortune.log
-rw-------  1 root        root          480086 Mar 17 14:58 etherXXXXfdsy8y
-rw-------  1 root        root          499652 Mar 17 14:33 etherXXXXRi2cQQ
-rw-rw-r--  1 nagios      nagios      52680394 Mar 22 10:06 nagios-results.out
c

names removed to protect the guilty
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