HASH

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How to dereference a reference to a hash or to an array in Perl

Moo with hash reference as attributes - with or without default values

ref - What kind of reference is this variable?

Search for hash in an array of hashes

Merge hashes of arrays

A hash and its uses - video

Creating a hash - video

Creating a hash from an array - video

Dumping a hash - video

Fetching data from a hash - video

exists, delete in hash - video

hash in SCALAR context - video

undef on Perl arrays and hashes

Key/Value Hash Slices

How to sort a hash in Perl?

How to sort a hash of hashes by value?

Reading CSV file as many hash-es

Creating a hash from an array in Perl

Hashes in Perl

How to insert a hash in another hash in Perl