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Full Discussion: if match found go to a particular line in perl
Top Forums Shell Programming and Scripting if match found go to a particular line in perl Post 302180383 by user_prady on Monday 31st of March 2008 02:26:39 AM
Old 03-31-2008
got one way
Quote:
Originally Posted by user_prady
I tried almost all way using next , redo and last command in perl , But I can't get these syntax correctly in perl. I know its easy ,but still I cant find the efficient way using while and next statement in perl.

I am trying to do the follwoing in perl

Code:
nawk ' {
        if($0 ~ /^\*Main Start/){
	     while( $0 !~ /^\*Main End/){
	     print $0;
             getline;
        }
     }
 } ' my.txt

One more code I want to do it in perl pls give me some basic idea how to do it without creating any temporary files ..

Code:
TMP=/tmp/my_tmp$$
nawk '
/\*Main End/{
split(x,arr,",")
print "Loop  " arr[1]
};
{x=$0
}
' my.txt > $TMP 

nawk '{
if($0 ~ /^Loop/){
    loop = $2 
    next;
  }
if($0 ~ /^\*Main Start/){
     printf "\nrepeat ("
     print  loop

} ' $TMP $my.txt


Thanks & Regards,
user_prady
At last I got one way to do it.

Code:
my @buffer;
$#buffer = 1;
open(IN, $file)|| die("Could not open file");
 
while(<IN>){
        push@buffer => $_;
        shift@buffer;
}
close(IN);
open(IN, $file)|| die("Could not open file");
while(<IN>){ 
       print $buffer[0] if/^\*Main Start/ ;
}
close(IN);

Regards,
prady
 

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LEARN ABOUT DEBIAN

ppix::regexp::structure::main

PPIx::Regexp::Structure::Main(3pm)			User Contributed Perl Documentation			PPIx::Regexp::Structure::Main(3pm)

NAME

       PPIx::Regexp::Structure::Main - Represent a regular expression proper, or a substitution

SYNOPSIS

	use PPIx::Regexp::Dumper;
	PPIx::Regexp::Dumper->new( 'qr{foo}smx' )
	    ->print();

INHERITANCE

       "PPIx::Regexp::Structure::Main" is a PPIx::Regexp::Structure.

       "PPIx::Regexp::Structure::Main" is the parent of PPIx::Regexp::Structure::Regexp and PPIx::Regexp::Structure::Replacement.

DESCRIPTION

       This abstract class represents one of the top-level structures in the expression. Both PPIx::Regexp::Structure::Regexp and
       PPIx::Regexp::Structure::Replacement are derived from it.

METHODS

       This class provides the following public methods. Methods not documented here are private, and unsupported in the sense that the author
       reserves the right to change or remove them without notice.

   delimiters
       This method returns a string representing the delimiters of a regular expression or substitution string. In the case of something like
       "s/foo/bar/", it will return '//' for both the regular expression and the replacement.

   interpolates
       This method returns true if the regular expression or replacement interpolates, and false otherwise. All it really does is to check whether
       the ending delimiter is a single quote.

SUPPORT

       Support is by the author. Please file bug reports at <http://rt.cpan.org>, or in electronic mail to the author.

AUTHOR

       Thomas R. Wyant, III wyant at cpan dot org

COPYRIGHT AND LICENSE

       Copyright (C) 2009-2012 by Thomas R. Wyant, III

       This program is free software; you can redistribute it and/or modify it under the same terms as Perl 5.10.0. For more details, see the full
       text of the licenses in the directory LICENSES.

       This program is distributed in the hope that it will be useful, but without any warranty; without even the implied warranty of
       merchantability or fitness for a particular purpose.

perl v5.14.2							    2012-06-06					PPIx::Regexp::Structure::Main(3pm)
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