[Jprogramming] index origin 0
Zsbán Ambrus
ambrus at math.bme.hu
Wed Jul 28 15:25:13 HKT 2010
2010年7月28日 Roger Hui <rhui000 at shaw.ca>:
> Negative indexing and index origin 1 can co-exist. e.g.
>> 3 1 4 2 X 'abcd'
> cadb
> _1 _2 _3 _4 X 'abcd'
> dcba
Indeed. Older versions of perl have a feature where you can change
the index origin (for arrays and strings) to one -- this has been
depreciated in newer versions for a while now. Perl also has negative
indexing. And, indeed, this is how perl interprets negative indices
when index origin is one.
Ambrus
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