From: Mike Moore <blowmage@...>
Date: 2007-07-14T06:09:53+09:00
Subject: Re: Base 26

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On 7/13/07, Peter Cooper <peter@peterc.org> wrote:
>
> On 7/13/07, Phrogz <phrogz@mac.com> wrote:
> >
> > On Jul 13, 2:39 pm, Stefan Rusterholz <apei...@gmx.net> wrote:
> > > Mike Moore wrote:
> > >> Hey friends!  What is the best way to convert a Numeric to a string
> > >> encoded
> > >> with base 26?  I want the string to contain just alpha characters,
> not
> > >> alphanumeric characters.  For now I'm using num.to_s(26).tr('0-9a-p',
> > >> 'a-z')
> > >> and I'm wondering if there is a more concise way.
> > > Anyway, if you need that instead of what to_s(26) already does, then I
> > > don't know a shorter way.
> >
> > How about (i+10).to_s(36)
>
>
> If it ends up in base 36 then it's still going to get numbers in it, just
> not for the first ten numbers! :)
>
> To the original poster.. no, it looks like you're doing it the best way
> IMHO. What you are trying to do is not standard (that is, base 26 is
> 0-9a-p), so a single 'tr' is nothng to sniff at to get your special
> variant
> :) Just abstract it away into your own method on Fixnum/Numeric if you
> want
> to keep it lean in your other code.


Thanks Peter.  I didn't mean to sniff at a single 'tr', I was just hoping
for a better way.  Right now I have my 'to_base26' and 'from_base26' methods
on Numeric and String respectively, but I think I might monkey-patch 'to_s'
and 'to_i' and add the base 26 logic when the 'base' argument is 26.

Cheers,
> Peter Cooper
> http://www.rubyinside.com/
>

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