Am Mo., 31. Dez. 2018 um 10:43 Uhr schrieb Malte Meyn <lilyp...@maltemeyn.de>: > > > > Am 31.12.18 um 09:58 schrieb Andrew Bernard: > > > > Why do you have to use cadr and not cdr on the ly:grob-set-property > > line? Isn't the broken part the second item in a list of two items? How > > to understand this? > > In Scheme, a list is a pair, containing the head/car (first element of > the list) and tail/cdr (sublist of all other elements). A list > containing only one element is a pair of that element and an empty list '(). > > '(1 2 3 4 5) > is the same as > '(1 . (2 . (3 . (4 . (5 . ())))) > > So the car of the list above is 1, the cdr is '(2 3 4 5). If you want to > get the 2, you have to take the car of '(2 3 4 5). And cadr is short for > “car of cdr”.
Or use 'second' a srfi-1-procedure, which provided by LilyPond as default: (second '(1 2 3)) Or 'list-ref': (list-ref '(1 2 3) 1) NB first element of a list is at position zero. Cheers, Harm _______________________________________________ lilypond-user mailing list lilypond-user@gnu.org https://lists.gnu.org/mailman/listinfo/lilypond-user