10-09-2007
awk problems
awk ' FILENAME=="First"{
arr[$1] = 1;
x=sub[$2] ;
}
FILENAME=="Second"{
if (/^10/ && arr[substr($0,31,5)]){
sub(substr($0,4,5),$x,$0);
print $0 ;
}
}
' First Second
the problem that I want to access the VAR X from the first file to modify the second file if the (IF expression is true)
the first problem :how can we solve this
the second problem : if we have several files as the second but the first is fixed how can we get the files automatically
here is an example of the files
the first file:
04756 23644
02565 25696
25698 25693
the second files:
10023658702365970000236587000204756
20002655000002365900000255
10002365000002365000002566900000225
thanks in advance
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LEARN ABOUT DEBIAN
perl::critic::policy::variables::requirenegativeindices
Perl::Critic::Policy::Variables::RequireNegativeIndices(User Contributed Perl DocumentPerl::Critic::Policy::Variables::RequireNegativeIndices(3pm)
NAME
Perl::Critic::Policy::Variables::RequireNegativeIndices - Negative array index should be used.
AFFILIATION
This Policy is part of the core Perl::Critic distribution.
DESCRIPTION
Conway points out that
$arr[$#arr];
$arr[$#arr-1];
$arr[@arr-1];
$arr[@arr-2];
are equivalent to
$arr[-1];
$arr[-2];
$arr[-1];
$arr[-2];
and the latter are more readable, performant and maintainable. The latter is because the programmer no longer needs to keep two variable
names matched.
This policy notices all of the simple forms of the above problem, but does not recognize any of these more complex examples:
$some->[$data_structure]->[$#{$some->[$data_structure]} -1];
my $ref = @arr;
$ref->[$#arr];
CONFIGURATION
This Policy is not configurable except for the standard options.
AUTHOR
Chris Dolan <cdolan@cpan.org>
COPYRIGHT
Copyright (c) 2006-2011 Chris Dolan.
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::Variables::RequireNegativeIndices(3pm)