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Top Forums Shell Programming and Scripting Swapping or switching 2 lines using sed Post 302250100 by radoulov on Wednesday 22nd of October 2008 05:32:31 PM
Old 10-22-2008
Quote:
Originally Posted by LaTortuga
I had trouble getting either of these to work (i'm probably running it in the wrong shell)[...]
This is strange,
what error/wrong behavior you got?

This is on my system:

Code:
% print -l {1..10}>infile
% cat infile 
1
2
3
4
5
6
7
8
9
10
% awk 'NR == FNR {
quote>   if (NR ~ "^("ln1"|"ln2")$")
quote>     _[++c] = $0
quote>   next
quote>   }
quote> FNR ~ "^("ln1"|"ln2")$" { $0 = _[c--] } 
quote> 1' ln1=3 ln2=5 infile infile
1
2
5
4
3
6
7
8
9
10
% awk 'NR == ln1, NR == ln2 { 
quote>   _[++c] = $0
quote>   if (NR == ln2 && j = c) 
quote>     while (++i <= c)
quote>       print _[NR ~ "^("ln1"|"ln2")$"?j--:i]
quote>   next
quote> }1' ln1=3 ln2=5 infile
1
2
5
4
3
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10

 

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PPI::Token::QuoteLike(3)				User Contributed Perl Documentation				  PPI::Token::QuoteLike(3)

NAME
PPI::Token::QuoteLike - Quote-like operator abstract base class INHERITANCE
PPI::Token::QuoteLike isa PPI::Token isa PPI::Element DESCRIPTION
The "PPI::Token::QuoteLike" class is never instantiated, and simply provides a common abstract base class for the five quote-like operator classes. In PPI, a "quote-like" is the set of quote-like things that exclude the string quotes and regular expressions. The subclasses of "PPI::Token::QuoteLike" are: qw{} - PPI::Token::QuoteLike::Words `` - PPI::Token::QuoteLike::Backtick qx{} - PPI::Token::QuoteLike::Command qr// - PPI::Token::QuoteLike::Regexp <FOO> - PPI::Token::QuoteLike::Readline The names are hopefully obvious enough not to have to explain what each class is. See their pages for more details. You may note that the backtick and command quote-like are treated separately, even though they do the same thing. This is intentional, as the inherit from and are processed by two different parts of the PPI's quote engine. SUPPORT
See the support section in the main module. AUTHOR
Adam Kennedy <adamk@cpan.org> COPYRIGHT
Copyright 2001 - 2011 Adam Kennedy. This program is free software; you can redistribute it and/or modify it under the same terms as Perl itself. The full text of the license can be found in the LICENSE file included with this module. perl v5.16.3 2011-02-26 PPI::Token::QuoteLike(3)
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