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arunix
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- arunix parentDo you remember which video that was?
- Also, the Query Object style, e.g. JOOQ and SQLAlchemy Core
- Consider
This is also mentioned in the docs:% perl -v | head -2 This is perl 5, version 40, subversion 0 (v5.40.0) built for x86_64-linux % % perl -E 'use feature "switch"; my ($x, $y); given ($x) { $y = 1 when /^abc/ }' given is deprecated at -e line 1. when is deprecated at -e line 1.
https://perldoc.perl.org/perldeprecation#SmartmatchSmartmatch is now seen as a failed experiment and was marked as deprecated in Perl 5.37.10. This includes the when and given keywords, as well as the smartmatch operator ~~. The feature will be removed entirely in the Perl 5.42.0 production release.>> In python you can't tell whats a variable and whats a list, and whats a dictionary by looking.
In Perl, sigils are used to distinguish between scalars/lists/hashes. Sigils and references are not the same thing.
- The key idea in CLOS is multi method dispatch, which Moose does not provide.
Moose out of the box has its own set of problems, leading to other workarounds, e.g.
Moo (a similar but much less bloated solution)
MooseX::Extended - Moose with more sensible/correct defaults
https://metacpan.org/dist/MooseX-Extended/view/lib/MooseX/Ex...
- OO in Perl is lower level compared to Java or C++, so e.g. instead of having a class construct, you have to simulate a class - typically by binding (blessing) a data structure to a namespace. Then any functions in the namespace become methods that can be called via the data structure (object).
In practice, this has turned out to be a mixed blessing because of how tedious it is to do this repeatedly. So over the years there have been many libraries created to make this easier, each with different features.
There's currently work underway to modernise Perl's built in OO to address these problems.
On the other hand, this makes some things easier, e.g. Design by Contract can be added to Perl just by writing a library.
Another example, adding traits to PHP required updating PHP itself, whereas in Perl there are libraries to do that.
- given/when are deprecated and will be removed in a future release.
References are a PITA - cumbersome to use, and they make code less readable.
Perl doesn't have first class functions (you can pass or return functions via references, but that's cumbersome and less readable compared to languages with better FP support).
- Perl had a similar motto ("Making Easy Things Easy and Hard Things Possible")
- Elliptical galaxies are ball-shaped.
- There was such a project long time ago.