in reply to Re^2: importing all the values stored in an HoH into an array
in thread importing all the values stored in an HoH into an array

What does 'keys' stand for? Is it a reference?

'keys' is a Perl built-in function. It returns a list of the keys in a given hash. You should read the documentation (which I already pointed you to above).

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<http://dave.org.uk>

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