this post was submitted on 13 Nov 2023
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Any way to make a variable save its old value? (alien.top)
submitted 1 year ago by field_thought_slight@alien.top to c/emacs
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I'm wondering if there's any way to make a variable automatically save its old value, so that I can, e.g., write a minor mode that will automatically restore the old values of variables when it's deactivated (without having to declare a bunch of -old-value variables).

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[–] arthurno1@alien.top 1 points 1 year ago

There is no built-in automatic way; you will have to backup your old values any way you want; create a bunch of new symbols, put them into a hash table, a list, or whichever else strategy you prefer.