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Full Discussion: sed - combination of line deletion and pattern matching
Top Forums UNIX for Dummies Questions & Answers sed - combination of line deletion and pattern matching Post 302681971 by jawsnnn on Sunday 5th of August 2012 05:46:08 AM
Old 08-05-2012
sed - combination of line deletion and pattern matching
I want to delete all the blank lines from a file before a certain line number. e.g.

Input file (n: denotes line number)
Code:
1: a
2: 
3: b
4: c
5: 
6: d

I want to delete all blank lines before line number 3, such that my output is:

Code:
a
b
c

d

I see that
Code:
 sed '/^$/d' in_file

works fine but works on the whole file.
Code:
 sed '1,3 /^$/d' 1

is incorrect. How can I achieve this?
 

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LEARN ABOUT DEBIAN

perl::critic::statistics

Perl::Critic::Statistics(3pm)				User Contributed Perl Documentation			     Perl::Critic::Statistics(3pm)

NAME

       Perl::Critic::Statistics - Compile stats on Perl::Critic violations.

DESCRIPTION

       This class accumulates statistics on Perl::Critic violations across one or more files.  NOTE: This class is experimental and subject to
       change.

INTERFACE SUPPORT

       This is considered to be a non-public class.  Its interface is subject to change without notice.

METHODS

       "new()"
	   Create a new instance of Perl::Critic::Statistics.  No arguments are supported at this time.

       " accumulate( $doc, @violations ) "
	   Accumulates statistics about the $doc and the @violations that were found.

       "modules()"
	   The number of chunks of code (usually files) that have been analyzed.

       "subs()"
	   The total number of subroutines analyzed by this Critic.

       "statements()"
	   The total number of statements analyzed by this Critic.

       "lines()"
	   The total number of lines of code analyzed by this Critic.

       "lines_of_blank()"
	   The total number of blank lines analyzed by this Critic. This includes only blank lines in code, not POD or data.

       "lines_of_comment()"
	   The total number of comment lines analyzed by this Critic. This includes only lines whose first non-whitespace character is "#".

       "lines_of_data()"
	   The total number of lines of data section analyzed by this Critic, not counting the "__END__" or "__DATA__" line. POD in a data section
	   is counted as POD, not data.

       "lines_of_perl()"
	   The total number of lines of Perl code analyzed by this Critic. Perl appearing in the data section is not counted.

       "lines_of_pod()"
	   The total number of lines of POD analyzed by this Critic. Pod occurring in a data section is counted as POD, not as data.

       "violations_by_severity()"
	   The number of violations of each severity found by this Critic as a reference to a hash keyed by severity.

       "violations_by_policy()"
	   The number of violations of each policy found by this Critic as a reference to a hash keyed by full policy name.

       "total_violations()"
	   The the total number of violations found by this Critic.

       "statements_other_than_subs()"
	   The total number of statements minus the number of subroutines.  Useful because a subroutine is considered a statement by PPI.

       "average_sub_mccabe()"
	   The average McCabe score of all scanned subroutines.

       "violations_per_file()"
	   The total violations divided by the number of modules.

       "violations_per_statement()"
	   The total violations divided by the number statements minus subroutines.

       "violations_per_line_of_code()"
	   The total violations divided by the lines of code.

AUTHOR

       Elliot Shank "<perl@galumph.com>"

COPYRIGHT

       Copyright (c) 2007-2011 Elliot Shank.

       This program is free software; you can redistribute it and/or modify it under the same terms as Perl itself.  The full text of this license
       can be found in the LICENSE file included with this module.

perl v5.14.2							    2012-06-07					     Perl::Critic::Statistics(3pm)
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