Recent questions tagged perl

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553 views

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perl - Why does Git.pm on cygwin complain about 'Out of memory during "large" request?

I'm getting this error while doing a git svn rebase in cygwin Out of memory during "large" request for 268439552 ... bytes at mem.pl line 6. See Question&Answers more detail:os...

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

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500 views

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perl - C#: Split string and assign result to multiple string variables

I have a string with several fields separated by a specific character, something like this: A,B,C I want to ... value in its own named variable. See Question&Answers more detail:os...

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

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521 views

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perl - Why does DateTime add a T separator to the timestamp?

My code: print DateTime->now; Response: 2012-08-17T20:16:37 Why is there a T? Is there an option I have forgotten? See Question&Answers more detail:os...

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

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532 views

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perl - How can I print a matching line, one line immediately above it and one line immediately below?

From a related question asked by Bi, I've learnt how to print a matching line together with the line ... guys. Again thanks you guys! See Question&Answers more detail:os...

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

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531 views

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perl - How to detect if any sound plays on a windows xp machine

Is it possible to detect if any sound plays on a windows xp machine? Help in any language would be useful. ... powered on or anything like 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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1.1k views

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perl - Error: 500 Can't connect to example.com:443 (certificate verify failed)

I get that error. Here is my code. use LWP::UserAgent; use HTTP::Request::Common qw(POST); use HTTP::Cookies; ... , though. Is it a good sign? See Question&Answers more detail:os...

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

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411 views

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perl - Should I keep a file open or should I open and close often?

Is it customary in such a case to open the file only once? #!/usr/bin/env perl use warnings; use 5.012; use ... $result; close $fh; sleep 3; } See Question&Answers more detail:os...

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

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512 views

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perl - Should I keep a file open or should I open and close often?

Is it customary in such a case to open the file only once? #!/usr/bin/env perl use warnings; use 5.012; use ... $result; close $fh; sleep 3; } See Question&Answers more detail:os...

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

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450 views

1 answer

perl - Should I keep a file open or should I open and close often?

Is it customary in such a case to open the file only once? #!/usr/bin/env perl use warnings; use 5.012; use ... $result; close $fh; sleep 3; } See Question&Answers more detail:os...

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

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436 views

1 answer

perl - Should I keep a file open or should I open and close often?

Is it customary in such a case to open the file only once? #!/usr/bin/env perl use warnings; use 5.012; use ... $result; close $fh; sleep 3; } See Question&Answers more detail:os...

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

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434 views

1 answer

perl - Should I keep a file open or should I open and close often?

Is it customary in such a case to open the file only once? #!/usr/bin/env perl use warnings; use 5.012; use ... $result; close $fh; sleep 3; } See Question&Answers more detail:os...

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

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502 views

1 answer

perl - How do I remove all undefs from array?

While reading from a configuration file in Perl there might be cases when a line is invalid and it does not ... all them afterwards? Thanks! See Question&Answers more detail:os...

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

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541 views

1 answer

perl - How do I prevent List::MoreUtils from warning about using $a and $b only once?

The List::MoreUtils module indicates that you use the variables $a and $b when supplying the BLOCK that goes ... and beyond: problem solved. See Question&Answers more detail:os...

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

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1.2k views

1 answer

perl - Decode an UTF8 email header

I have an email subject of the form: =?utf-8?B?T3.....?= The body of the email is utf-8 base64 ... do I extract information from this string? 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 - Using CPAN with a proxy failing after o conf init /proxy/

I have a Linux box in a corporate environment in which web access is gated through a proxy which ... corporate proxy with authentication? See Question&Answers more detail:os...

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

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827 views

1 answer

perl - Regex matching multiple negative lookahead

I'm trying to match a string (using a Perl regex) only if it doesn't start with "abc:" or "defg:", but I can't ... like ^(?:(?!abc:)|(?!defg:)) See Question&Answers more detail:os...

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

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912 views

1 answer

perl - How can I convert my JSON to CSV using jq?

I have the following JSON data: {"id":"111","case":"Y","custom":{"speech invoked":"no","input ... any perl or shell solution is 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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466 views

1 answer

perl - How do I read a file which is constantly updating?

I am getting a stream of data (text format) from an external server and like to pass it on to a ... , which is continuously getting updated? See Question&Answers more detail:os...

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

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594 views

1 answer

perl - How do I get started writing a module for CPAN?

Right now, I have my own homegrown testing harness/directory structure/support doc strucure/distribution tools for ... the CPAN-like structure? 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

1 answer

perl - STDOUT redirected to variable not catching pipe output

I want to temporarily redirect stdout to an in memory variable. Prints are correctly redirected to my variable but ... output: before bc 4 See Question&Answers more detail:os...

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

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695 views

1 answer

perl - Merge hashes with arrays with Hash::Merge

I am trying to merge two hashes which contains one or more arrays using Hash::Merge. For example: use strict; ... output using Hash::Merge ? See Question&Answers more detail:os...

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

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600 views

1 answer

perl - Why doesn't my parent process see the child's output until it exits?

Consider the following script: use IO::File; $| = 1; my ($handle, $pid) = myPipe(); if ($pid == 0) { ... for the pipe to flush to the parent? See Question&Answers more detail:os...

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

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923 views

1 answer

perl - How to use foreach with a hash reference?

I have this code foreach my $key (keys %ad_grp) { # Do something } which works. How would the same look ... reference, $ad_grp_ref, to the hash? See Question&Answers more detail:os...

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

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497 views

1 answer

perl - Is "map" a loop?

While answering this question, I came to realize that I was not sure whether Perl's map can be considered a loop ... in a list of Perl loops. See Question&Answers more detail:os...

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

0 votes

583 views

1 answer

perl - Is there SQL parameter binding for arrays?

Is there a standard way to bind arrays (of scalars) in a SQL query? I want to bind into an IN ... accumulating some good Perl-specific info. See Question&Answers more detail:os...

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

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556 views

1 answer

perl - How can I use __DATA__ twice?

How can I use __DATA__ twice? #!/usr/local/bin/perl use warnings; use 5.012; while ( <DATA> ) { print ... } __DATA__ one two three four five six See Question&Answers more detail:os...

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

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773 views

1 answer

perl - Using output from a previous job in a new one in a GitHub Action

For (mainly) pedagogical reasons, I'm trying to run this workflow in GitHub actions: name: "We ?? Perl" on ... the success or failure. Any idea? See Question&Answers more detail:os...

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

0 votes

557 views

1 answer

perl - How to generate an array with random values, without using a loop?

How can I generate an array in Perl with 100 random values, without using a loop? I have to avoid all kind of ... know how to do it in Perl. See Question&Answers more detail:os...

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

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