12-01-2003
or else you can use expr substr command
e.g. `expr substr $var 1 2`
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Here is my code
let x=10 #or any other calculated value done here
`echo $sol | awk '{print substr($0,1,(x-3))}'`
Question.
I am able to use the variable x in beginning at character "1"
but I get nothing when using it for the next n characters.
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What is the more efficient way to do this (awk only and default FS) ?
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Hi,
My input file is
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41;2;xxxx;yyyyy....
41;2;xxxx;yyyyy....
..
..
I need to change the second field value from 2 to 1. i.e.,
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41;1;xxxx;yyyyy....
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..
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Hi,
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I'm writing a shell script in which I need to be able to pull a portion of the file name out. I'm testing with the following code:
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can anybody explain this code?
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Hi All,
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I have a command like this:
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512345981,213456,100071
512345982,213456,100091
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LEARN ABOUT DEBIAN
perl::critic::policy::builtinfunctions::prohibitlvaluesubstr
Perl::Critic::Policy::BuiltinFunctions::ProhibitLvalueSuUser(Contributed Perl DocPerl::Critic::Policy::BuiltinFunctions::ProhibitLvalueSubstr(3pm)
NAME
Perl::Critic::Policy::BuiltinFunctions::ProhibitLvalueSubstr - Use 4-argument "substr" instead of writing "substr($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)