Re: Infinity as index

[Andrew Starks <andrew.starks@...>]

On Thu, Apr 24, 2014 at 11:22 AM, Thiago L. <fakedme@gmail.com> wrote:
>
> On 24/04/2014 12:41, steve donovan wrote:
>>
>> On Thu, Apr 24, 2014 at 5:34 PM, Thiago L. <fakedme@gmail.com> wrote:
>>>
>>> I think it should expand +inf to #str and -inf to 1 (= passing -#str to
>>> the
>>> function)...
>>
>> Actually, on 2nd thought, I agree with Lukas - I also would expect
>> s:sub(inf) to be the empty string, seeing inf as the limit of
>> increasing integer value.
>>
>> Although in practice - do bugs occur because of this?
>>
> Well something like what I said... I would actually expect str:sub(inf) to
> expand to str:sub(#str+1) and str:sub(-inf,inf) to expand to
> str:sub(0,#str+1)... or something...
>

This is a really basic question (maybe so much so as to be off-topic):

What is all of this useful for? Where do you guys come across this in real life?

-Andrew