I thought I had seen somethink about this, but does Perl reserve a block of memory upon startup for user variables? Or are user variables always allocated when they are created/initialized with Newx, Newxz ?
From some benchmarks it seems that Perl does set some memory aside to avoid requesting memory from the OS all the time, and I thought I had seen some material about how to modify this "scratch space" but I could be very wrong or senile.

submitted by /u/ReplacementSlight413
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I have noticed the Perl Cookbook, 2nd Edition as an outstanding reference. How about the work Perl by Example, Fifth Edition? How does it compare? Would you recommend it as a reference as well?

submitted by /u/fosres
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Hi Everyone.

I am learning from the book "Learning Perl" and so far the journey is thankfully going great!

One thing noticed about Perl is that although the developer community here is smaller than other mainstream languages it feels very tight-knit. Is that just me or were you also drawn to Perl because of the strong community responsiveness to each other?

submitted by /u/fosres
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UUID::Tiny has a weird way of getting a random 32bit integer using 2x random 16 bit integers bitwise OR'd together:

sub _rand_32bit { _init_globals(); my $v1 = int(rand(65536)) % 65536; my $v2 = int(rand(65536)) % 65536; return ($v1 << 16) | $v2; }

Anyone know why you would do this instead of just: my $rand = int(rand(2**32));? Also why the modulus, isn't it redundant?

submitted by /u/scottchiefbaker
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Although this StackOverflow question about "islands and gaps" is titularly about Perl, the SQL answers are very nice. Apparently this is a FAQ for SQL.

However, this has bugged me for years on the CPAN side, but never enough to make me really do anthing about.

I thought there was a Perl module that did this, and it was in the context of a usenet reader that would take a list of article IDs, such as 1, 2, 3, 4, 5, 7, 10, 11, 15 and return something like 1-5,7,10-11,15 as a more space-efficient store of all the articles you had read.

Every time I've looked I've stopped after 15 minutes because I get distracted and I've never really needed this except to answer someone else's question. I'm not asking how to solve this because there are plenty of algorithm tutorials out there. Surely this is on CPAN somewhere.

There are plenty of options to go the other way and to ask if a number is in one of the ranges.

• Usenet was pre-web reddit, and comp.lang.perl and comp.lang.perl.misc are where I got my start in the Perl socials before there was "social".

submitted by /u/briandfoy
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I am new to this subreddit, but not new to Perl, though I've been flirting with Python for a little over two years so I'm a little out of the loop.

If I wanted to create a RESTful API using Catalyst and have my Swagger docs generated automatically, are there any toolchain recommendations that anyone can make?

Thanks.

submitted by /u/Biggity_Biggity_Bong
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This might be Perl/docker-perl#161 but if I filed this in the wrong place, let me know. Keeping these things current is the sort of thing I'd pay for.

Pulling perl images locally give the same warnings for old perl versions, although my local docker will still run them:

$ docker pull perl:5.14 5.14: Pulling from library/perl Image docker.io/library/perl:5.14 uses outdated schema1 manifest format. Please upgrade to a schema2 image for better future compatibility. More information at https://docs.docker.com/registry/spec/deprecated-schema-v1/ 

/usr/bin/docker pull perl:5.14 5.14: Pulling from library/perl [DEPRECATION NOTICE] Docker Image Format v1 and Docker Image manifest version 2, schema 1 support is disabled by default and will be removed in an upcoming release. Suggest the author of docker.io/library/perl:5.14 to upgrade the image to the OCI Format or Docker Image manifest v2, schema 2. More information at https://docs.docker.com/go/deprecated-image-specs/ Warning: Docker pull failed with exit code 1, back off 5.148 seconds before retry. /usr/bin/docker pull perl:5.14 5.14: Pulling from library/perl [DEPRECATION NOTICE] Docker Image Format v1 and Docker Image manifest version 2, schema 1 support is disabled by default and will be removed in an upcoming release. Suggest the author of docker.io/library/perl:5.14 to upgrade the image to the OCI Format or Docker Image manifest v2, schema 2. More information at https://docs.docker.com/go/deprecated-image-specs/ Warning: Docker pull failed with exit code 1, back off 4.06 seconds before retry. /usr/bin/docker pull perl:5.14 5.14: Pulling from library/perl [DEPRECATION NOTICE] Docker Image Format v1 and Docker Image manifest version 2, schema 1 support is disabled by default and will be removed in an upcoming release. Suggest the author of docker.io/library/perl:5.14 to upgrade the image to the OCI Format or Docker Image manifest v2, schema 2. More information at https://docs.docker.com/go/deprecated-image-specs/ Error: Docker pull failed with exit code 1 

 matrix: os: - ubuntu-22.04 perl-version: - '5.8' - '5.10' - '5.12' - '5.14' - '5.16' - '5.18' - '5.20' - '5.22' - '5.24' - '5.26' - '5.28' - '5.30' - '5.32' - '5.34' - '5.36' - 'latest' container: image: perl:${{ matrix.perl-version }} 

Mo utilities for email.

Changes for 0.02 - 2024-04-26T23:02:53+02:00

• Add tests for error parameters.
• Rewrite the tests so that the functional tests are first and then the errors.