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| From: | Jean Abou Samra |
| Subject: | Re: Tweak grobs with callback output? |
| Date: | Wed, 19 Jul 2023 21:41:07 +0200 |
| User-agent: | Evolution 3.48.4 (3.48.4-1.fc38) |
\tweak color #(if (equal? DOWN (ly:grob-property grob 'direction)) red blue)
You just forgot to wrap the _expression_ in (lambda (grob) ...) .
Best,
Jean
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