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Top Forums UNIX for Dummies Questions & Answers Reversing line and word order using awk Post 302506628 by blink_w on Monday 21st of March 2011 12:17:09 PM
Old 03-21-2011
Computer Reversing line and word order using awk

Hello, I am new to awk and I was wandering if I could reverse line and word order from a text file using awk. I figured out how to do them both separately, but can't quite figure out how to mix them.

Example:

Input file:
Code:
dog cat mouse
1 2 3
I am new to awk

Output of the awk program:
Code:
awk to new am I
3 2 1
mouse cat dog

Thank you in advance for your replies! Smilie

Moderator's Comments:
Mod Comment Please use [code] and [/code] tags when posting code, data or logs etc. to preserve formatting and enhance readability, thanks.

Last edited by zaxxon; 03-21-2011 at 01:45 PM.. Reason: code tags
 

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English(3pm)						 Perl Programmers Reference Guide					      English(3pm)

NAME
English - use nice English (or awk) names for ugly punctuation variables SYNOPSIS
use English; use English qw( -no_match_vars ) ; # Avoids regex performance penalty # in perl 5.16 and earlier ... if ($ERRNO =~ /denied/) { ... } DESCRIPTION
This module provides aliases for the built-in variables whose names no one seems to like to read. Variables with side-effects which get triggered just by accessing them (like $0) will still be affected. For those variables that have an awk version, both long and short English alternatives are provided. For example, the $/ variable can be referred to either $RS or $INPUT_RECORD_SEPARATOR if you are using the English module. See perlvar for a complete list of these. PERFORMANCE
NOTE: This was fixed in perl 5.20. Mentioning these three variables no longer makes a speed difference. This section still applies if your code is to run on perl 5.18 or earlier. This module can provoke sizeable inefficiencies for regular expressions, due to unfortunate implementation details. If performance matters in your application and you don't need $PREMATCH, $MATCH, or $POSTMATCH, try doing use English qw( -no_match_vars ) ; . It is especially important to do this in modules to avoid penalizing all applications which use them. perl v5.18.2 2014-01-06 English(3pm)
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