On 2010-09-25 13:07, John W. Krahn wrote:
Dr.Ruud wrote:
On 2010-09-25 01:57, Vaishnavi Saba wrote:
My query: In the code shown below, How does *grep* compare a scalar( *
$seen{$_}* ) with an array of hash references ( *...@_* ).
=====
@common = inter( \%foo, \%bar, \%joe );
sub inter {
my %seen;
for my $href ( @_ ) {
while (my $k = each %$href ) {
Replace the while-line by:
for my $k ( keys %$href ) {
Why? Either way will work and the while loop will use less memory.
Oops, thanks for the correction, I forgot about the
each-in-scalar-context mode.
--
Ruud
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