perl hash keys - SERP Analysis

https://perldoc.perl.org/functions/keys

https://www.geeksforgeeks.org/perl-keys-function/

https://www.perltutorial.org/perl-hash/

https://www.perl.com/article/27/2013/6/16/Perl-hash-basics-create-update-loop-delete-and-sort/

https://www.tutorialspoint.com/perl/perl_hashes.htm

https://stackoverflow.com/questions/3033/whats-the-safest-way-to-iterate-through-the-keys-of-a-perl-hash

https://www.geeksforgeeks.org/perl-hash/

https://www.perlmonks.org/?node_id=11127604

https://www.learn-perl.org/en/Hashes

https://www.cs.mcgill.ca/~abatko/computers/programming/perl/howto/hash/

https://www.oreilly.com/library/view/perl-cookbook/1565922433/ch05s05.html

https://perlmaven.com/perl-hashes

https://www.oreilly.com/library/view/perl-cookbook/1565922433/ch05s12.html

https://www.tutorialspoint.com/how-to-count-the-number-of-keys-in-a-perl-hash

https://perldoc.perl.org/Hash::Util

https://perl101.org/hashes.html

https://perl.developpez.com/documentations/en/5.8.9/functions/keys.html

https://www.youtube.com/watch?v=e2XIfxr5Pl0

https://www.cs.drexel.edu/~kn33/cs265_spring_2014/Perl_Presentation_2.pdf

https://sites.radford.edu/~nokie/classes/380/perl/hashes.html

https://www.geos.ed.ac.uk/~bmg/software/Perl%20Books/cookbook/ch05_08.htm

https://stackoverflow.com/questions/52595297/referencing-hash-keys-with-a-variable-in-perl/52595870

https://www.quora.com/How-do-you-print-a-hash-value-in-Perl

https://www.classes.cs.uchicago.edu/archive/2006/winter/10100-1/html/perl/perl_hashes.html

https://www.educba.com/perl-hash/

https://docstore.mik.ua/orelly/perl4/prog/ch09_04.htm

http://cs.furman.edu/~tallen/Xcsc105/materials/hashDISP.pdf

https://perlmaven.com/perl-hash

https://help.cengage.com/webassign/instructor_guide/webassign/t_i_using_hashes.htm

https://en.perlzemi.com/blog/20161013147635.html

https://opensource.com/article/18/2/perl-hashes-and-arrays-basics

https://alvinalexander.com/blog/post/perl/how-to-traverse-loop-items-elements-perl-hash/

https://www.reddit.com/r/perl/comments/1750o5/can_someone_help_me_with_hash_references_before_i/

https://superuser.com/questions/1003420/using-hashes-values-and-keys-in-perl

https://www.youtube.com/watch?v=I-llfc4iERw

https://www.stat.berkeley.edu/~spector/extension/perl/notes/node44.html

https://www.tek-tips.com/threads/show-all-hash-keys-in-ref.955117/

https://www.javadrive.jp/perl/func/index21.html

https://www.youtube.com/watch?v=kqJluD64f-g

https://abf.io/import/perl-Hash-SafeKeys/tree/rosa2023.1

https://bi.biopapyrus.jp/perl/syntax/hash.html

https://www.youtube.com/watch?v=Mu4lOw72648

https://www.youtube.com/watch?v=eEFnsMccvSA

https://www.youtube.com/watch?v=04rOQV9dzp8

https://perlzemi.com/blog/20080210120265.html

https://www.md5hashgenerator.com/

https://www.postgresql.org/docs/current/datatype-json.html

https://github.com/openwall/john

https://www.youtube.com/watch?v=UKbUR0tE9V4

https://docs.python.org/3/glossary.html

https://www.youtube.com/watch?v=9oOavJJd-c0

http://www.runoob.com/redis/redis-hashes.html

https://www.youtube.com/watch?v=ImpQrwkqRSI

https://www.youtube.com/watch?v=M3HA3tiuGdo

https://woocommerce.github.io/woocommerce-rest-api-docs/

https://en.wikipedia.org/wiki/ZIP_(file_format)

https://www.youtube.com/watch?v=Sb5uxokCCnA

https://github.com/apache/apisix

https://developer.ibm.com/tutorials/au-lexyacc/

https://www.udemy.com/course/master-the-coding-interview-data-structures-algorithms/?srsltid=AfmBOor4mCYKBfpE2OQ7pvdbk2gjYLPGWuxYnBMX2VUpe1O3hTz1O-h3

https://www.gnu.org/software/gettext/manual/gettext.html

https://www.youtube.com/watch?v=wexEC3sHXPo

https://bugs.python.org/file47781/Tutorial_EDIT.pdf

https://www.youtube.com/watch?v=iA_HFgLJjFs

https://hup.hu/comment/3194014

https://blog.eduguru.in/tutorial/hashes-in-perl-key-values-hashes

https://www.youtube.com/watch?v=aCRjx8ApQbM

https://www.youtube.com/watch?v=tkSgS9J3kfo

https://www.youtube.com/watch?v=EqV0jjCByNo