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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?
Reading CSV file as many hash-es
Can't use string (...) as an HASH ref while "strict refs" in use at ...
Useless use of hash element in void context
Create hash from two arrays: keys and values
Exchange values and keys of a hash - how to reverse a hash
Hashes in Perl
How to sort a hash in Perl?
How to sort a hash of hashes by value?
Perl Hash
Printing hash of hashes of arrays by the array
The Hash-bang line, or how to make a Perl scripts executable on Linux
Dumping a hash - video
Multi dimensional hashes in Perl
A hash and its uses - video
Creating a hash - video
Creating a hash from an array - video
Fetching data from a hash - video