Re: Scheme function question

[Janek Warchoł]

2013/11/21 Gilberto Agostinho <address@hidden>:
> David Kastrup wrote
>> As a rule, don't use a music argument twice without copying in the same
>> expression.  \music copies music, just like $music does.  #music is very
>> Scheme-like: it does not change anything.  Often, that's what you want.
>
> Hi David,
>
> Is the difference between #variable and $variable inside a function covered
> in LilyPond's reference? I can't find it there, and I'd love to understand
> this better.

I see something in the Extending manual:
http://www.lilypond.org/doc/v2.17/Documentation/extending-big-page.html#lilypond-scheme-syntax

hth
Janek