On Sat, Jun 17, 2017 at 07:35:44AM +0200, Alexander Burger wrote:
> On Fri, Jun 16, 2017 at 06:31:06PM -0800, Christopher Howard wrote:
> > Hi list. In picolisp, what would be the simplest way to check if a
> > string (trans sym) is one character long and that the character is one
> > of the letters a-z or A-Z?
> 
> I would do:
> 
>    (member C '`(mapcar char (conc (range 65 90) (range 97 122))))

Sorry, no!

It is shorter, faster and more readable to do:

   (or (>= "Z" C "A") (>= "z" C "a"))

♪♫ Alex

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