Still comparing apple and oranges.

Handrolling your own my_any or exists_any is not that complicated, only 10-15% slower that List::Util:any .

And exists_any has a nice syntax too. 

sub my_any (&@) {
  my $block = shift;
  $block->() && return !!1
    for @_ ;
  return !!0
}

sub exists_any (\%@) {
  my $h_hash = shift @_;
  exists $h_hash->{$_} && return 1
    for @_;
  return !!0
}


my %hash;
my @list = 0 .. 1_000_000;
@hash{ map int rand @list, 1 .. 1000 } = ();

say my_any { exists $hash{$_} } @list;

say exists_any %hash, @list;      # note cleaner syntax

[download]

Of course there is no point in reinventing my_any if List::Util is available, but if this semanics is regularly needed a custom function will pay of easily in terms of readability.

Cheers Rolf
(addicted to the Perl Programming Language :)
see Wikisyntax for the Monastery

In reply to Re^5: Why doesn't exist work with hash slices? by LanX
in thread Why doesn't exist work with hash slices? by Anonymous Monk

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