math is hard (to remember)

cabney cabney at
Thu Jul 12 23:00:07 CDT 2001

On 12 Jul 2001, Randal L. Schwartz wrote:

> Here's one way that involves more recursion than iteration.  I've come
> up with ways that involve more iteration than recursion too. :)
> my @list = qw(red orange yellow green blue);
> combo([], @list);
> sub combo {
>   my $base = shift;
>   if (@_) {
>     my $first = shift;
>     combo($base, @_);
>     combo([@$base, $first], @_);
>   } else {
>     print "@$base\n" if @$base; # skip null set
>   }
> }

Oh I like it... you don't have to look in the base if you are chewing
away at the list...

Thanks! :)

There was a time
A wind that blew so young
For this could be the biggest sky
And I could have the faintest idea


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