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?
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
The easiest way to find the highest hash value without looping through all of them (max)
How to sort a hash in Perl?
How to sort a hash of hashes by value?
Hashes in Perl
The Hash-bang line, or how to make a Perl scripts executable on Linux
Fast lookup by name or by date - Array - Hash - Linked List
Merge hashes of arrays
Creating a hash from an array in Perl
How to insert a hash in another hash in Perl