Re: repeat index

[Gianmaria Lari]

On 20 November 2017 at 12:00, David Kastrup <address@hidden> wrote:

Gianmaria Lari <address@hidden> writes:

> I have this:
>
> \version "2.19.80"
>
> scale = {c d e f g a b}
> pattern = {c d e f}
>
> \fixed c' {
>   \modalTranspose c c \scale \pattern
>   \modalTranspose c d \scale \pattern
>   \modalTranspose c e \scale \pattern
>   \modalTranspose c f \scale \pattern
>   \modalTranspose c g \scale \pattern
>   \modalTranspose c a \scale \pattern
>   \modalTranspose c b \scale \pattern
>   \modalTranspose c c' \scale \pattern
> }
>
> Is there any (simple) way to rewrite it in a more concise way like this for
> example?
>
>   \repeat unfold 7 {
>     \modalTranspose c "c+index" \scale \pattern
>   }

What is simple?

\version "2.18.0"

scale = {c d e f g a b}
pattern = {c d e f}

\fixed c' {
  #@(map
      (lambda (p)
        #{ \modalTranspose c #(ly:make-pitch -1 p) \scale \pattern #})
      (iota 8))
}

--
David Kastrup

Thank you David, it works perfectly!

Is there any way to encapsulate it in a function to avoid to write all the code any time I need it?

* * *

Regarding "simple". Never think seriously about what I mean with "simple".  Maybe:

Suppose that you know well how to informally solve a problem. 

Now suppose you have to describe your solution in a formal and algorithmic way.

Between many formal solution I would say that the simplest one is that one that better overlap the informal solution.

g.