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"has"
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Moose constructor
Moose testing type constraint
Can't use string (...) as an HASH ref while "strict refs" in use at ...
Useless use of hash element in void context
Reading CSV file as many hash-es
Printing hash of hashes of arrays by the array
Exchange values and keys of a hash - how to reverse a hash
Create hash from two arrays: keys and values
How to sort a hash in Perl?
How to sort a hash of hashes by value?
Perl Hash
How to check if string is empty or has only spaces in it using Perl?
The Hash-bang line, or how to make a Perl scripts executable on Linux
Creating a hash from an array in Perl
How to insert a hash in another hash in Perl
Multi dimensional hashes in Perl
Perl hash in scalar and list context
Merge hashes of arrays
Dumping a hash - video
A hash and its uses - video