Recent questions tagged perl

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perl - Why does Perlbrew launch bash on Mac OS X Lion?

When I run... perlbrew switch perl-5.16.0 ...I get... A sub-shell is launched with perl-5.16.0 as the ... behavior? If not, how can I fix it? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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700 views

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perl - How to stop forking in this code

So I have a perl script that goes out there and wgets pieces of a stream (I don't know how many pieces there are ... "; sleep 1; `rm END`; See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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963 views

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perl - Odd number of elements in hash assignment with default

Greeting Dear Community. I'm trying to make a sub in perl that takes a hash and a debug flag ... event_c3_z1=2 201609230100: event_c3_z2=1 See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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646 views

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perl - is it allowed to pass pipes to constructors?

I tried to do something very fancy in Perl, and I think I'm suffering the consequences. I don't know if what I ... I'm not allowed to do this. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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815 views

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perl - PayPal IPN: unable to get local issuer certificate

I am using curl to verify the PayPal IPN but it throws error: SSL certificate problem: unable to get local issuer ... ' . curl_error($ch); } See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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868 views

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perl - Trouble installing DBD::mysql under macOS Mojave

Can't install DBD::mysql under macOS Mojave with perl v5.18.2 MySQL Community Server 8.0.13 is installed from ... 0.dyli What do you advise ? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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577 views

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perl - How do I average column values from a tab-separated data file, ignoring a header row and the left column?

My task is to compute averages from the following data file, titled Lab1_table.txt: retrovirus genome gag pol env ... someone's process was. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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636 views

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perl - How Do I Persist A Scalar Value Across Program Executions?

Code sample var_inc1.pl: #!/usr/bin/perl -w my $x = 0; $x++; print "value : ".$x." "; ... scalar value increments at each program execution. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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643 views

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perl - How can I export an Oracle table to tab separated values?

I need to export a table in the database to a tab separated values file. I am using DBI on Perl and ... made solution if it is available. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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711 views

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perl - Building a local CPAN repository

I wonder if there are any options in Perl to build a local CPAN repository including the modules I want and ... modules there with no headaches? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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619 views

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perl - How to detect when socket connection is lost?

I have a script (I don't have the code example here at the moment but I used IO::Async) which ... another more creative or cleaner solution? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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731 views

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perl regex escape characters

I have heard perl is a good language at doing regex but i am a bit confused at the characters that requires ... ? Am i using something wrong? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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709 views

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perl - How exactly does unlink work?

I'm having a little difficulty understanding how exactly this works. It seems that unlink() will remove the ... being freed up immediately? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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583 views

1 answer

perl - How can I expand a string like "1..15,16" into a list of numbers?

I have a Perl application that takes from command line an input as: application --fields 1-6,8 I am required to ... . Can it be done this way? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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734 views

1 answer

perl - why does sort with uniq not work together

I have the following script: use strict; use List::MoreUtils qw/uniq/; use Data::Dumper; my @x = (3 ... and similar pitfalls? Thanks, David See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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766 views

1 answer

perl - how to get the Absolute Path for symlink file?

# test-> a.pl my $file = '/home/joe/test'; if ( -f $file && -l $file ) { print readlink( $file ) ... to get the Absolute Path for symlink file ? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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709 views

1 answer

perl - How do I print the '%' character with 'printf'?

Simple problem that I can't figure out... How can I print a '%' character within a printf string? The code below ... => 3125.19 898.02 28.7% See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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578 views

1 answer

perl - How can I combine files into one CSV file?

If I have one file FOO_1.txt that contains: FOOA FOOB FOOC FOOD ... and a lots of other files FOO_files.txt. ... a lot for any help ! Yohad See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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786 views

1 answer

perl - Why does my XSD file fail to parse with XML::LibXML?

I am trying to validate an XML against schema using LibXML::Schema Validator CPAN module. In that same script am ... XML resource 'export.xsd'. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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583 views

1 answer

perl - input to the program with all the strings in an array one by one

I have a shell script consisting of so many perl scripts, one of the perl script have to be run with differnt input each ... txt .... ... .... See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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722 views

1 answer

perl - How to specify default values for optional subroutine arguments?

Is there an elegant way to specify default values for subroutine arguments? Currently, I am using the following ... ), to process_args.. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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619 views

1 answer

perl - Propagation of signal to parent when using system

I have written a wrapper script that starts another script using system(). The child script traps SIGINT and processes the ... .e. sh vs bash ) See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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741 views

1 answer

perl - Regex: delete contents of square brackets

Is there a regular expression that can be used with search/replace to delete everything occurring within square brackets ( ... [too] early]!") See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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1.0k views

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perl - Why do I get "SMTP Failed to connect to mail server:" when I try to send an email to a Gmail account using MIME::Lite?

I have following code to send an email in Perl: #!/usr/bin/perl use MIME::Lite; $to = '[email protected]'; $cc ... .gmail.com How can I fix this? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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640 views

1 answer

perl - What type is STDOUT, and how do I optionally write to it?

Does STDOUT have a "type"? printf STDERR ("STDOUT = %s ", STDOUT); printf STDERR ("*STDOUT = %s ... the compound question; they seemed related. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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842 views

1 answer

perl - How can I replace a particular character with its upper-case counterpart?

Consider the following string String = "this is for test. i'm new to perl! Please help. can u help? ... your help will be greatly appreciated. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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1.1k views

1 answer

perl - How to add header, footer with images using PDF::API2::Lite?

Is it possible to add header(with text and one image) and footer (with page number) with images. I wrote below ... } $pdf->saveas( $outfile ); See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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729 views

1 answer

perl - Why does my command-line not run from cron?

I have a perl script (part of the XMLTV family of "grabbers", specifically tv_grab_oztivo). I can successfully run it ... it's running as me? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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