On Mon, 27 Jan 2003, Michael Lazzaro wrote: > Some requests for verification, plus additional questions. If anyone > has any arguments/clarifications/questions on these, please discuss so > I can document. > > 1) Edge cases in array indexing: > > @a[ undef ] # undef, or 1? > @a['foo'] # undef, or 1?
These should generate warnings, at least. I don't know whether undef or 1 is more correct. Perl5 chooses 1, but it's smart enough to distiguish between $a["1e0"] (returns 2) and $a["1e"] (returns 1 and a non-numeric warning), so it's definitely choosing to return $a[0] for non-numeric indexes. (0+"1e" is 1, not 0) > Is [undef] the same as [0] in Perl6? Is there any index value you can > give that will cause an exception? What about @a[NaN]? Just another warning probably. ~ John Williams
