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How to delete newline with perl

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Top Forums Shell Programming and Scripting How to delete newline with perl
# 1  
Old 10-15-2010
Debian How to delete newline with perl
input:
Code:
donkey

monkey


dance


drink

output should be:
Code:
donkey
monkey
dance
drink

# 2  
Old 10-15-2010
try chomp

---------- Post updated at 09:49 AM ---------- Previous update was at 09:42 AM ----------

Code:
use strict;
use warnings;

open(FILE, "<", "a") or die;

my $data;
while ( $data = <FILE> ) {
    chomp($data);
    print $data, "\n" if ( $data =~ /./ );
}

close(FILE) or warn;

Last edited by matrixmadhan; 10-15-2010 at 01:49 AM..
# 3  
Old 10-15-2010
Any regular expression to solve this?
# 4  
Old 10-15-2010
Code:
$ 
$ 
$ cat -n f24
     1    donkey
     2    
     3    monkey
     4    
     5    
     6    dance
     7    
     8    
     9    drink
$ 
$ 
$ perl -lne 'print if /./' f24
donkey
monkey
dance
drink
$ 
$

# 5  
Old 10-15-2010
Please explain this line:
Code:
 $ perl -lne 'print if /./' f24

'print if / ./'
# 6  
Old 10-15-2010
Code:
perl -i -pe 's/^\s+$//g' file

Last edited by k_manimuthu; 10-15-2010 at 01:58 AM.. Reason: update
This User Gave Thanks to k_manimuthu For This Post:
cola
# 7  
Old 10-15-2010
Quote:
Originally Posted by cola
Please explain this line:
Code:
 $ perl -lne 'print if /./' f24

'print if / ./'
. represents any character except a newline ( \n )
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