Re: program to compute gears, with table

[Joerg]

On 2017-09-08 12:59, David Scheidt wrote:
> In rec.bicycles.tech Joerg <news@analogconsultants.com> wrote:
> :On 2017-09-08 10:52, Emanuel Berg wrote:
> :> Skip Montanaro wrote:
> :>
> :>> * Why the 1.0 divisor when computing gear?
> :>
> :> As explained, otherwise it'll be integer
> :> division. But I think that qualifies as a hack
> :> (not an ugly hack tho) so there is no shame in
> :> spotting it an "error" :)
> :>
> :>> * You can skip the radius and use wheel
> :>> (diameter) directly in computing
> :>> the circumference.
> :>
> :> Right!
> :>
> :>> * It never occurred to me to do this in Lisp.
> :>> I always just use an online calculator, like:
> :>>
> :>> 
> http://www.gear-calculator.com/?GR=DERS&KB=34,50&RZ=12,13,15,17,19,21,23,25&UF=2150&TF=90&SL=2.6&UN=KMH
> :>
> :> Let's agree there is no need to do it in Lisp.
> :> Only a desire :)
> :>
>
> :Why make things complicated? I do such stuff with spreadsheets. That's
> :what they were invented for. Part of every office software including
> :free ones.
>
> I rewrote his code in common lisp in less time than it takes excel to
> start.

Wow, you must be able to type at hundreds of letter a second. Here, it 
takes less than 2sec for Excel to start. Mostly only a split second to 
open the file because I usually have it running nearly all the time.

--
Regards, Joerg

http://www.analogconsultants.com/