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"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?
The Hash-bang line, or how to make a Perl scripts executable on Linux
The easiest way to find the highest hash value without looping through all of them (max)
undef on Perl arrays and hashes
Can't use string (...) as an HASH ref while "strict refs" in use at ...
Useless use of hash element in void context
Template Toolkit processing Hash of Hashes
Fast lookup by name or by date - Array - Hash - Linked List
How to sort a hash in Perl?
How to sort a hash of hashes by value?
Create hash from two arrays: keys and values
Exchange values and keys of a hash - how to reverse a hash
Sorted hash in Perl using Tie::IxHash
Search for hash in an array of hashes
each - iterate over Perl hash elements pair-by-pair
Key/Value Hash Slices
Merge hashes of arrays
delete an element from a hash