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Scheme function for tempo marking -- "hash" for names?

From: Dmytro O. Redchuk
Subject: Scheme function for tempo marking -- "hash" for names?
Date: Mon, 29 Sep 2008 14:54:37 +0300

Hi, all,

i'm sorry, this is, probably, purely-scheme-related-question.
Sorry, i'm not a programmer.

I wanted to align tempo mark ("Adagio", "Moderato" etc)
left-side-centered on key signature
if it is not C-dur or A-moll, otherwise aligned left-side above left
side of time signature.

I wrote small function for tempo marking:

tempoMark =
#(define-music-function (parser location mark anchor offset)
                                                (string? list? number?)
                \once \override Score.RehearsalMark #'self-alignment-X = #-1
                \once \override Score.KeySignature
#'break-align-anchor-alignment = #CENTER
                \once \override Score.TimeSignature
#'break-align-anchor-alignment = #LEFT
                \once \override Score.RehearsalMark
#'break-align-symbols = #$anchor
                \once \override Score.RehearsalMark #'Y-offset = #$offset
                \mark \markup { \bold \smaller $mark }

I use it like this:

\tempoMark "Moderato" #'(key-signature) #0

Next, let's say, i would like to have tempo marking translated into Ukrainian
("Швидко" instead of "Allegro" etc.). But i'm not sure that i will not
change those
translations, so i would like to have a function like this:

moderato =
#(define-music-function (parser location anchor offset)
                                                (list? number?)
                \tempoMark "Помірно" $anchor #$offset

and to use it like this:

\moderato #'(key-signature) #0

So, if i decide to "translate back", or to change translations, i can
modify function definition.

But in this case i need to write a lot of identical functions.

So, two questions:
1. Is it possible to define a "hash" (key->value) and use it in a
single function?
   I am not a programmer [*], so please give me a clue.
2. May be, i am quite *wrong*, and should use some different approach?

Thank you.

 * I know how to program this in Python, perl, awk, bash;
   however i'm not a programmer at all, that's why i'm asking
   for "keyword" or "template", or smth like this.

Dmytro O. Redchuk

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