You shouldn't necessarily assume you have to loop at all. Perl 6 also lets you take a junctional approach: 
    $lowest  = one(@list_of_int) <= all(@list_of_int);
    $highest = one(@list_of_int) >= all(@list_of_int);
    $lowest  = one(@list_of_int) le all(@list_of_string);
    $highest = one(@list_of_int) ge all(@list_of_string);

[download]
Or something like that...

In reply to Re: Thoughts on some new operators for perl (6 or 7) by TimToady
in thread Thoughts on some new operators for perl (6 or 7) by BigLug

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