Recent questions tagged perl

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perl regex not matching string with newline character

I'm trying to use perl (v5.14.2) via a bash shell (GNU Bash-4.2) in Kubuntu (GNU/Linux) to search ... spot the issue or suggest a 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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527 views

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perl - Passing arguments to redirect_to in mojolicious and using them in the target controller

I am passing arguments to redirect_to like $c->redirect_to('named', foo => 'bar'); or $c->redirect_to(' ... of foo in the target controller. See Question&Answers more detail:os...

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

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485 views

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perl - Is space supposed to be ignored between a sigil and its variable name?

I just discovered that perl ignores space between the sigil and its variable name and was wondering if someone ... know anything about 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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710 views

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perl - split() but keep delimiter

I have never used Perl before and I have a basic question. my $string1 = "Hi. My name is Vlad. It is ... period. how can this be accomplished? See Question&Answers more detail:os...

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

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572 views

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perl - How to use an array reference to pairs of elements

I am considering this answer which uses a single array reference of points, where a point is a reference to ... clearer to the original setting? See Question&Answers more detail:os...

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

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503 views

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perl - What's the difference between various $SIG{CHLD} values?

What is the difference between these settings? $SIG{CHLD} = 'IGNORE' $SIG{CHLD} = 'DEFAULT' $SIG{CHLD} = ' ... the reaper never sees the child. See Question&Answers more detail:os...

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

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953 views

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perl - How to install pp (PAR Packager)?

I have to create an exe from a Perl script. I installed ActivePerl-5.14.2.1402-MSWin32-x86-295342.msi How do I install pp? See Question&Answers more detail:os...

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

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555 views

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perl - How can I flexibly add data to Moose objects?

I'm writing a module for a moose object. I would like to allow a user using this object (or myself...) add some ... -fly stuff I'd like to add. See Question&Answers more detail:os...

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

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477 views

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perl - Why does this map block contain an apparently useless +?

While browsing the source code I saw the following lines: my @files_to_keep = qw (file1 file2); my %keep = map { + $_ = ... > 1, 'file2' => 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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623 views

1 answer

perl - How do I access the HTTP Header of request in a CGI script?

I've used Perl a bit for small applications and test code, but I'm new to networking and CGI. I get ... headers.cgi -H "HeaderAttribute: value" See Question&Answers more detail:os...

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

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508 views

1 answer

perl - What is the best option for building a plugin system for a Moose application?

I want to write a app that can be extended via plugins, using Perl and Moose. I know there are a ... about before implementing a plugin system? See Question&Answers more detail:os...

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

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557 views

1 answer

perl - How can I find the newest created file in a directory?

Is there an elegant way in Perl to find the newest file in a directory (newest by modification date)? What I ... There must be a better 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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487 views

1 answer

perl - How to make Mason2 UTF-8 clean?

Reformulating the question, because @optional asked me it wasn't clear and linked one HTML::Mason based solution Four ... modify in the above? See Question&Answers more detail:os...

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

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756 views

1 answer

perl - Sort CSV based on a certain column?

I'm sure I've done this in the past and there is something small I'm forgetting, but how can I sort a ... 24,male name,25,female name,27,female See Question&Answers more detail:os...

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

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596 views

1 answer

perl - Getting names of directories under given path

I am trying to get the names of all first level directories under given path. I tried to use File::Find but ... Can someone help me with that? See Question&Answers more detail:os...

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

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596 views

1 answer

perl - Printing an array within double quotes

my @a = (1,2,3,4,5); print @a; #output: 12345 print " "; print "@a"; #output: 1 2 3 4 5 Printing an ... ; instead of print "@a"; and vice versa. See Question&Answers more detail:os...

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

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983 views

1 answer

perl - Type of argument to keys on reference must be unblessed hashref or arrayref

if((scalar keys ($this->{'libraries'}->{$y}->{'cellHash'})) == 0){ This is the line where I am ... am not posting the code for obvious reasons. See Question&Answers more detail:os...

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

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437 views

1 answer

perl - Which package from CPAN should I use to send mail?

Which package from CPAN should I use to send mail? Sometime the timtowtdi approach is very tiring. For ... or popularity billboard somewhere? See Question&Answers more detail:os...

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

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447 views

1 answer

perl - How can I still get automatic assignment to '$_' with a mocked 'readline' function?

Perl has some special handling for the readline function (and the equivalent <> I/O operator) where it treats the ... ) in all the legacy code. See Question&Answers more detail:os...

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

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422 views

1 answer

perl - How to traverse all the files in a directory; if it has subdirectories, I want to traverse files in subdirectories too

opendir(DIR,"$pwd") or die "Cannot open $pwd "; my @files = readdir(DIR); closedir(DIR); foreach my $file (@files) ... $mtime"; print " "; } } See Question&Answers more detail:os...

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

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626 views

1 answer

perl - Best way to capture output from system command to a text file?

I'm trying to capture output from using Perl's system function to execute and redirect a system command's ouptut ... of doing the same thing? See Question&Answers more detail:os...

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

0 votes

602 views

1 answer

perl - How can I still get automatic assignment to '$_' with a mocked 'readline' function?

Perl has some special handling for the readline function (and the equivalent <> I/O operator) where it treats the ... ) in all the legacy code. See Question&Answers more detail:os...

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

0 votes

506 views

1 answer

perl - How to traverse all the files in a directory; if it has subdirectories, I want to traverse files in subdirectories too

opendir(DIR,"$pwd") or die "Cannot open $pwd "; my @files = readdir(DIR); closedir(DIR); foreach my $file (@files) ... $mtime"; print " "; } } See Question&Answers more detail:os...

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

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589 views

1 answer

perl - Best way to capture output from system command to a text file?

I'm trying to capture output from using Perl's system function to execute and redirect a system command's ouptut ... of doing the same thing? See Question&Answers more detail:os...

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

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493 views

1 answer

perl - Why is modulus different in different programming languages?

Perl print 2 % -18; --> -16 Tcl puts [expr {2 % -18}] --> -16 but VBScript wscript.echo 2 mod -18 --> 2 Why the difference? See Question&Answers more detail:os...

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

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530 views

1 answer

perl - How can I fetch the last row I inserted using DBI?

How can I fetch the last row that was inserted using DBI (DBD::mysql)? Code sample: my $sth = $dbh->prepare(' ... and n0rd for your answers. :-) See Question&Answers more detail:os...

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

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673 views

1 answer

perl - Checking for existence of hash key creates key

Given the following code #!/usr/bin/perl use Data::Dumper; my %hash; my @colos = qw(ac4 ch1 ir2 ird kr3); ... if exists. Where did I go 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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607 views

1 answer

perl - How do I tell CPAN.pm to install all modules in a specific directory?

I have set makepl_arg [INSTALLDIRS=site PREFIX=~/perl] mbuildpl_arg [--install_base ~/perl] in the CPAN.pm ... modules in the same directory? See Question&Answers more detail:os...

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

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