Re: Scheme help for lyric align on vowel

[David Kastrup]

"Carl D. Sorensen" <address@hidden> writes:

> There's been a discussion on -user about getting lyrics aligned on vowels.
> Kieren came up with a clever, but somewhat cumbersome, manual means of
> accomplishing it.  I'm trying to convert that to an automatic, virtually
> transparent means.
>
> I've got it all worked out, I think, except for one challenge that may be a
> show stopper.
>
> I need to define a function (double x) that can work as follows.  I want
>
> (map double '(1 2 3))
>
> to return 
>
> (1 1 2 2 3 3)
>
>
> Can anybody help me figure out how to do this?  As far as I can see, it's
> not possible.

Definitely impossible.  map returns a list with the same number of
elements as its input.  Why do you need to use map in this manner?

-- 
David Kastrup