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From: | David Kastrup |
Subject: | Re: Bug with transpose in functions |
Date: | Fri, 12 Jul 2019 21:48:13 +0200 |
User-agent: | Gnus/5.13 (Gnus v5.13) Emacs/27.0.50 (gnu/linux) |
Werner LEMBERG <address@hidden> writes: >> Functions like transpose act destructively on their argument, so you >> need a copy or the original will get changed. [...] > > How can Joe User find out whether a function is acting destructively? All music functions are allowed to do that by definition because it would be inefficient if every transformation would have to create a copy. -- David Kastrup
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