Doh, I knew there was a single step approach for Nr.2.. it just wouldn't occur to me last night.

I'm not sure I like your approach to the first one though - using a subref to get around the lack of control in naked blocks seems to hackish. I'm not really happy with my own alternative, either:

my $hash_has_non_undef = do {
    local $_;
    my $found = 0;

    defined && ($found++, last)
        while (undef, $_) = each %hash;

    $found;
};

[download]
But without Perl 6 junctions there's not much that can be done about it if you need shortcircuiting..

Makeshifts last the longest.

In reply to Re^2: One liner to Check and undef hash elements (shortcircuiting) by Aristotle
in thread One liner to Check and undef hash elements by Anonymous Monk

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