in reply to Re^2: Hash assignments using map
in thread Hash assignments using map
Right. My point is, why not loop over the elements in @keepers, rather than the keys of the other hash?
my %big_hash = (...); my @to_keep = ('abc', 'xyz'); %big_hash = map { exists($big_hash{$_}) ? ($_ => $big_hash{$_}) : () } + @to_keep; # or %big_hash = map { $_ => $big_hash{$_} } grep { exists $big_hash{$_} } +@to_keep;
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