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Full Discussion: Can one do a tr within an awk
Top Forums Shell Programming and Scripting Can one do a tr within an awk Post 302254911 by joeyg on Wednesday 5th of November 2008 12:29:49 PM
Old 11-05-2008
Question Can one do a tr within an awk
I am reading a file with awk, and because it is a fixed file using substr to select and write out parts of specific lines. However, one of my fields sometimes has extra characters. I know I can
Code:
awk 'substr($0,251,4)=="2008" {print substr($0,170,4)","substr($0,271,10)' $file_in >$fileout

But, that data at 271 for 10 characters might be
12345 which is good
12345a which I want to write as just 12345

in unix script, I could (assuming jbno contains my text)
Code:
jno=$(echo jbno | tr -d [a-zA-Z ])

to get rid of alpha characters and spaces

So, can something like that be done within an awk command?
 

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LEARN ABOUT DEBIAN

perl::critic::policy::builtinfunctions::prohibitlvaluesubstr

Perl::Critic::Policy::BuiltinFunctions::ProhibitLvalueSuUser(Contributed Perl DocPerl::Critic::Policy::BuiltinFunctions::ProhibitLvalueSubstr(3pm)

NAME

       Perl::Critic::Policy::BuiltinFunctions::ProhibitLvalueSubstr - Use 4-argument "substr" instead of writing "substr($foo, 2, 6) = $bar".

AFFILIATION

       This Policy is part of the core Perl::Critic distribution.

DESCRIPTION

       Conway discourages the use of "substr()" as an lvalue, instead recommending that the 4-argument version of "substr()" be used instead.

	   substr($something, 1, 2) = $newvalue;     # not ok
	   substr($something, 1, 2, $newvalue);      # ok

       The four-argument form of "substr()" was introduced in Perl 5.005.  This policy does not report violations on code which explicitly
       specifies an earlier version of Perl (e.g. "use 5.004;").

CONFIGURATION

       This Policy is not configurable except for the standard options.

SEE ALSO

       "substr" in perlfunc (or "perldoc -f substr").

       "4th argument to substr" in perl5005delta

AUTHOR

       Graham TerMarsch <graham@howlingfrog.com>

COPYRIGHT

       Copyright (c) 2005-2011 Graham TerMarsch.  All rights reserved.

       This program is free software; you can redistribute it and/or modify it under the same terms as Perl itself.

perl v5.14.2							    2012-06-07	 Perl::Critic::Policy::BuiltinFunctions::ProhibitLvalueSubstr(3pm)
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