Re: should every thing be zero indexed?


Jim Rogers wrote:
> spinoza1111@xxxxxxxxx wrote in news:1115248398.464044.38450
> @g14g2000cwa.googlegroups.com:
>
> > This for loop would have the structure of a quantification: for all
x,
> > do something. Our "not caring" in what order the xs are done unto
would
> > free us from a Fortran era annoyance, which is the fact that
arrays,
> > which want to be sets, have to follow the rules for, and be
understood
> > as, arrays.
>
> I acknowledge that the concept of arrays was used heavily in Fortran,
> and has been included in many languages developed since the earliest
> versions of Fortran.
>
> I can see how some uses of arrays would be better expressed as sets,
but
> I can also see how some collections require a specific ordering,
which is
> not necessary in a set.
>
> >
> > I am fooling around with an abstract VB .Net or C# iterator which
would
> > by default schedule each cycle through a for loop as a new thread
to
> > see if the concept flies.
>
> I suspect you can make the concept fly, or at least work acceptably.
> I also suspect that you will find the creation of such a cloud of
> threads to actually be slower than serial iteration, since the number
> of threads will probably greatly exceed the number of processors on
> your system. If the for loop does something mundane such as totalling
> a set of values the cloud of threads approach will quickly degenerate
> into a set of serial operations.
>
> True asynchronous behavior will only be possible when the number of
> threads is no greater than the number of processors or processor
cores,

This doesn't seem 100% right. If only one processor is involved, and
gets stuck in a thread while doing I/O, the thread can be suspended and
another thread can be activated.

My understanding is that "I/O" can involve paging I/O.
> and each thread operates on completely independent data addresses,
with
> no need for coordination beyond that needed to determine when the
> algorithm is complete.
>
> Jim Rogers

.

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