in reply to iterators: traversing arbitrary data structure
Take a look at Data::Rmap. It's rmap() routine is a recursive map specifically for traversing nested data structures.
use Data::Rmap; ... rmap{ s/^\s+\n//; } $oWkBook;
Examine what is said, not who speaks -- Silence betokens consent -- Love the truth but pardon error.
Lingua non convalesco, consenesco et abolesco. -- Rule 1 has a caveat! -- Who broke the cabal?
"Science is about questioning the status quo. Questioning authority".
In the absence of evidence, opinion is indistinguishable from prejudice.
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Seekers of Perl Wisdom