> if ( !grep(/$key/, @keysToKeep) )

Careful! Without anchors you'll also match on substrings, so better /^$key$/.

Anyway try to avoid regexes when possible and use eq

if ( not grep { $key eq $_ }  @keysToKeep) )

Cheers Rolf

( addicted to the Perl Programming Language)

edit

corrected code

In reply to Re^2: Parsing an Array of Hashes, Modifying Key/Value Pairs by LanX
in thread Parsing an Array of Hashes, Modifying Key/Value Pairs by librarat

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