That is interesting. One change I'd suggest would be to not say if @foo, since that will result in the iterator returning 0 (@foo in scalar context) when the list is exhausted. Unconditionally saying shift @foo will return undef instead, which, while still ambiguous if @foo may contain undef, is more what I'd expect.

Either way, your iterator is only expecting to be called in scalar context; you could expand it to allow returning the remaining list when the iterator is called in list context: 

sub foo {
    # ...
    wantarray ? @foo : sub { wantarray ? splice @foo : shift @foo } };
}

[download]
(It is a little inconsistent to use return in sub foo but not in the anonymous sub.)

In reply to Re: Return a list or an iterator by ysth
in thread Return a list or an iterator by nferraz

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