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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?
delete an element from a hash
exists - check if a key exists in a hash
exists, delete in hash - video
The easiest way to find the highest hash value without looping through all of them (max)
Search for hash in an array of hashes
How to sort a hash in Perl?
How to sort a hash of hashes by value?
The Hash-bang line, or how to make a Perl scripts executable on Linux
Merge hashes of arrays
Fast lookup by name or by date - Array - Hash - Linked List
Hashes in Perl
Create hash from two arrays: keys and values
Exchange values and keys of a hash - how to reverse a hash
Perl Hash
Template Toolkit processing Hash of Hashes
Dumping a hash - video
Hash of Arrays in Perl