Questions tagged [mutability]
The mutability tag has no usage guidance.
4 questions
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“A mutable object stops being mutable if it is part of an expression that is evaluated.”
GNU Emacs Lisp Reference Manual, section 2.9 Mutability:
A mutable object stops being mutable if it is part of an expression that is evaluated. For example:
(let* ((x (list 0.5))
(y (eval (...
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Run an external shell command to mutate text
I would like to run par or fmt to format my .md file.
In vim this would be %!fmt (for the whole buffer) or 13,16!fmt (for line 13 - line 16).
What's the "emacs way" to achieve something like ...
3
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Why is this function not pure
I just spent a significant amount of time debugging an issue that boils down to the following:
(defun my-new-alist ()
`((x . nil)))
(setq a (my-new-alist))
(setq b (my-new-alist))
(push 1 (alist-...
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Proper reinitialization of a list? What is happening under the hood?
I'm teaching myself some more elisp and have encountered the following problem:
If I want to reset a list variable it won't get updated after the first evaluation. Here is some example code:
(defun ...
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