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?
Hashes in Perl
Search for hash in an array of hashes
Reading CSV file as many hash-es
Fast lookup by name or by date - Array - Hash - Linked List
Merge hashes of arrays
Create hash from two arrays: keys and values
How to sort a hash in Perl?
How to sort a hash of hashes by value?
Dumping a hash - video
Hash of Arrays in Perl
Useless use of hash element in void context
The Hash-bang line, or how to make a Perl scripts executable on Linux
undef on Perl arrays and hashes
Template Toolkit processing Hash of Hashes
Exchange values and keys of a hash - how to reverse a hash
Can't use string (...) as an HASH ref while "strict refs" in use at ...