03-20-2009
Thanks, the first solution works nicely!
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1. Shell Programming and Scripting
Hi,
May I know, if a pipe separated File is large, what is the best method to calculate the unique row count of 3rd column and get a list of unique value of the 3rdcolum?
Thanks in advance! (20 Replies)
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2. Shell Programming and Scripting
I want to sort alphabetically on the first field and sort in descending numerical order on the 2nd field. With a normal "sort -r -n" it does this:
abc ||| 5e-05 ||| bla
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def ||| 1 ||| abc
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As you can see it ignores the fact that 5e-05 is actually 0.00005... (1 Reply)
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Hi Everyone,
Any simple code can simplify the code below, please advice. Thanks
# cat 2.pl
#!/usr/bin/perl
use warnings;
use strict;
my @aaaaa = <DATA>;
my @uids;
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Hi,
I'm a learner of PERL programming.
I've a input file with the below data:
SWAT_5, 1703, 2010-09-21
SWAT_6, 2345, 2010-09-21
SWAT_7, 1792, 2010-09-21
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5. Shell Programming and Scripting
Input file
---------
12:name1:|host1|host1|host2|host1
13:name2:|host1|host1|host2|host3
14:name3:
......
Required output
---------------
12:name1:host1(2)|host1(1)
13:name2:host1(2)|host2(1)|host3(1)
14:name3:
where (x) - Count how many times field appears in last column
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I have a file with contents below
123,502
123,506
123,702
234,101
235,104
456,104
456,100
i want to sort such that i get a unique value in column A, and for those with multiple value in A, i want the lowest value in B.
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123,502
234,101
235,104
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7. Shell Programming and Scripting
I have another file with three columns A,B,C as below
123,1,502
123,2,506
123,3,702
234,4,101
235,5,104
456,6,104
456,7,100
i want to sort such that i get a unique value in column A, and for those with multiple value in A, i want the lowest value in C.
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I have this input file
tilenet_test:clar_r5_performance:server_2:4.80762:0%:APM00083103999-009E,APM00083103999-009F
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9. UNIX for Dummies Questions & Answers
I would like to print unique lines without sort or unique. Unfortunately the server I am working on does not have sort or unique. I have not been able to contact the administrator of the server to ask him to add it for several weeks. (7 Replies)
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10. Shell Programming and Scripting
Hi,
I have an input file that I have sorted in a previous stage by $1 and $4. I now need something that will take the first record from each group of data based on the key being $1
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1000AAA|"ZZZ"|"Date"|"1"|"Y"|"ABC"|""|AA
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LEARN ABOUT MOJAVE
task::weaken
Task::Weaken(3) User Contributed Perl Documentation Task::Weaken(3)
NAME
Task::Weaken - Ensure that a platform has weaken support
DESCRIPTION
One recurring problem in modules that use Scalar::Util's "weaken" function is that it is not present in the pure-perl variant.
While this isn't necesarily always a problem in a straight CPAN-based Perl environment, some operating system distributions only include
the pure-Perl versions, don't include the XS version, and so weaken is then "missing" from the platform, despite passing a dependency on
Scalar::Util successfully.
Most notably this is RedHat Linux at time of writing, but other come and go and do the same thing, hence "recurring problem".
The normal solution is to manually write tests in each distribution to ensure that "weaken" is available.
This restores the functionality testing to a dependency you do once in your Makefile.PL, rather than something you have to write extra
tests for each time you write a module.
It should also help make the package auto-generators for the various operating systems play more nicely, because it introduces a dependency
that they have to have a proper weaken in order to work.
How this Task works
Part of the problem seems to stem from the fact that some distributions continue to include modules even if they fail some of their tests.
To get around that for this module, it will do a few dirty tricks.
If Scalar::Util is not available at all, it will issue a normal dependency on the module. However, if Scalar::Util is relatively new ( it
is >= 1.19 ) and the module does not have weaken, the install will bail out altogether with a long error encouraging the user to seek
support from their vendor (this problem happens most often in vendor-packaged Perl versions).
This distribution also contains tests to ensure that weaken is available using more normal methods.
So if your module uses "weaken", you can just add the following to your Module::Install-based Makefile.PL (or equivalent).
requires 'Task::Weaken' => 0;
SUPPORT
Bugs should be always be reported via the CPAN bug tracker at
<http://rt.cpan.org/NoAuth/ReportBug.html?Queue=Task-Weaken>
For other issues,contact the author.
AUTHOR
Adam Kennedy <adamk@cpan.org>
SEE ALSO
Task, Scalar::Util, <http://ali.as/>
COPYRIGHT
Copyright 2006 - 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 v5.18.2 2011-03-08 Task::Weaken(3)