Questions tagged [variables]

for variables in Emacs Lisp, which are symbols with values. The symbol’s name is also called the variable name. Most variable names, by convention, consist of lowercase, ordinary words separated by hyphens.

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Why won't emacs permanently save my buffer-local var?

For many files I have file-local variables which asked me once if they were safe and I could add them permanently to my "trusted" list, never to be asked again. However, I get asked every ...
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1answer
18 views

How to add more default face highlight colors

Using (highlight-symbol-at-point) at some point the highlight start repeating colors. I find the variable that holds the default face highlight color values in Emacs is: hi-lock-face-defaults It ...
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1answer
46 views

Modify value of a variable by applying a function to it?

Suppose one of the customizable variables in a package is var, and its default value is a list, list. I understand I can change the value of var to mylist using (setq var mylist) in my init.el. ...
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20 views

Can't save safe variables for further

When I start Emacs it asks me if I want to allow "unsafe" variables which I agree and press '!' to save them for the future. Despite that, it still keeps asking me about it on every launch. ...
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2answers
72 views

Change $PATH once emacs is running

In my shell (Bash), I can switch among several LaTeX distros setting the $PATH variable. E.g.: export PATH=/usr/local/texlive/2016/bin/x86_64-linux:$PATH or export PATH=/usr/local/texlive/2018/bin/...
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50 views

org-capture-template “:created” property

Studying the variable org-capture-template I found several configurations where a certain :created t property is used. One example is here In my help buffer (help:org-capture-templates) I could not ...
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24 views

It is safe to delete set free variables?

For example I have followins line of code (usually I get these code from answers). (projectile-global-mode) ; smerge-mode (setq smerge-command-prefix "\C-cv") (setq undo-tree-show-...
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1answer
481 views

Symbol’s function definition is void

I am trying to make an interactive toggle in emacs 27.0.90 When I eval-region no warnings or errors are shown. However, when I do (helm/toggle-frame) in ielm it throws Symbol’s function definition is ...
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2answers
317 views

Is there a way to spread a list like in Typescript or Golang?

I have a variable with some common values between dap-mode debug templates and I want to use that variable along with other cons elements for :environment-variable in languages like Golang or ...
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3answers
41 views

The global value of a variable I set with setq in my config differs from the local value. How can I get my value to be what I want in every buffer?

I want web-mode-script-padding to be set to 0 at all times. In my config, I have tried both (with-eval-after-load 'web-mode (setq web-mode-script-padding 0) ) As well as simply, (setq web-mode-...
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1answer
21 views

How to change a variable value in the current buffer?

I spent a long time looking for this and kept getting reference to M-x customize. But, that didn't give me access to certain variables like comment-start. I couldn't access comment-start with M-x ...
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1answer
24 views

Add element to org-refile-targets

I am keeping a common init.el for work and private on separate machines. So dependent on my machine I have common settings and machine dependent settings. How do I get to add an element to the org-...
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33 views

Multiple cursors has undefined variables

I installed multiple cursors mode. My init.el has the following at the bottom: (require 'bytecomp) (require 'multiple-cursors) (multiple-cursors-mode 1) (global-set-key (kbd "C-S-c C-S-c") 'mc/edit-...
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1answer
27 views

Wrong type argument: symbolp, 10

I would like create function that ask me how length I want the Pomodoro but it say wrong type argument. (defun changePomoLength () (interactive) (set-variable org-pomodoro-length (read-string "...
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1answer
23 views

Giving faces compliant names

The description of defface in (info "(elisp) Defining Faces") says that the name of a face should not end in -face. But most faces declared in font-lock.el do use the suffix -face. How does this fit ...
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1answer
106 views

How can I get the effect of buffer-local symbol plist property values?

Does Emacs have a way to set buffer-local properties on symbols? It's well-known that there are buffer-local variables. But a property belongs to a symbol, not to a variable. Hence, if I have ...
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1answer
44 views

How to set a variable that matches different type of strings?

I have these strings: First Type: arXiv:1234.56789 arXiv:1234.56789v1 Second type: hep-th/123456789 hep-th.AB/12345689 hep-th/123456789v1 hep-th.AB/12345689 Belong to the second type even strings ...
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2answers
38 views

Make/unmake a variable globally buffer-local depending on another variable

I have a package with the variable my-package--my-var that needs to be buffer-local when my-package-buffer-only is t but global if my-package-buffer-only is nil. This is what I have so far: (...
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1answer
134 views

What's really behind an assignment in Emacs lisp?

[Warning : these are noob questions.] I'm a beginner in Emacs Lisp and I would like to be sure that I understand well what I'm really doing when I set a value to a variable with setq or let. Here is ...
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1answer
43 views

Get value of a variable from another session in org-mode

How to share variables' values in org-mode between different sessions? Simple example: in session one I create _gpg_tmpdir #+name: make_temporary_directories #+begin_src bash :session *one* ...
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1answer
80 views

Keep ivy-initial-inputs-alist nil after counsel loaded

I want to keep the alist ivy-initial-inputs-alist nil after ivy and counsel are loaded. Therefore, I have the following configuration: (use-package ivy :ensure t :config ;; some keybindings ...
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1answer
32 views

Evaluate allows for combinations whose operators are compound expressions

I find the amazing power of scheme in sicp Exercise 1.4. Observe that our model of evaluation allows for combinations whose operators are compound expressions. Use this observation to describe ...
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44 views

How to extract symbols from an elisp buffer?

While I could parse the elisp myself, is there a way to extract symbols from an elisp buffer? That is, variable names, macros & functions - not part of strings.
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1answer
74 views

Regular expression gives different results as variable and as literal

In the Emacs *scratch* buffer, I get different results when I use the same regular expression as a variable compared to a literal: (setq splitter-string "9:20") "9:20" (string-match "[0-9]?[0-9]:[0-...
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1answer
32 views

eval-expression on (setq helm-debug t) does not change describe-variable output

I'm running this version of Emacs: GNU Emacs 26.3 (build 2, x86_64-pc-linux-gnu, GTK+ Version 3.24.11) of 2019-09-23, modified by Debian Installed on Ubuntu 19.10 via apt, and not built from source. ...
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89 views

Error running timer ‘ac-update-greedy’: (void-variable org-link-types)

I very recently updated to Emacs 26.3 and Org 9.2.6, and am getting the above-mentioned error whenever I type "[[" in an org-mode buffer to type a hyperlink. Unsurprisingly, no error after turning off ...
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2answers
88 views

Treat all numbers as floats

Is there a way to get elisp to automatically treat all numeric variables as floating points without having to repeatedly use the float function? For example to a division function that outputs the "...
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1answer
165 views

Check whether buffer is in org-mode

I want to programmatically check whether the current buffer is in org mode. I know that major modes should usually define the variable <modename>-mode, i.e., org-mode should be a defined ...
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1answer
50 views

Is variable assignment an atomic operation in elisp?

I have a situation in a mode I'm writing that saves a portion of the output of a long-running asynchronous process to a variable at intermittent intervals. I need to access this data periodically. My ...
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2answers
93 views

Unusual behavior when overriding `calculate-lisp-indent'

I've modified calculate-lisp-indent as a better solution to the indentation questions here, here and here. By "modified" I mean I overrode the function with advice. After doing this when I restarted ...
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1answer
74 views

How to check whether an optional param was input?

I have a command with an optional argument whose value is a number. I need: If no input argument then use default value (1000) else use input arg. (random t) (defun insert-random-number-at-point(&...
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3answers
440 views

How to modify a string without altering its text properties

If I propertize a string and save it to a variable, how can I change the string within that variable without altering its text properties? For example: (setq myvar (propertize "testing" ...
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1answer
143 views

Surprisingly persistent local variable

A local variable keeps coming back, and I know not whence. In a certain buffer, TeX-command-extra-options is "--synctex=1", even after I have removed this from my init.el and restarted Emacs. I tried ...
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2answers
115 views

Accessing the global value of a locally altered variable

Is it possible to access the global value of a variable that has been changed locally? (setq foo 2) (let ((foo 3)) ;; can I access the original value here? )
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1answer
62 views

Can a symbol have a function, variable, and class?

Q: can one symbol refer to a function, a variable, and a class? Elisp is a Lisp-2 in which a symbol can have separate function and variable values. So, for example, I can define the following ...
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1answer
161 views

Wrong type argument: symbolp, possible mismatched parenteses in .spacemacs

I am trying to apply a fix to make it easier to change todo status in org mode. The code is the following: '( (org :variables org-want-todo-bindings t) ) from https://github.com/syl20bnr/...
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1answer
27 views

How best to define nullable integer customizable variables?

I would like to define a variable using defcustom so that it can be customized by users of an emacs package. The variable is an integer (let's call it spam-override), and its function is to override ...
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1answer
292 views

Find variable definition and uses in emacs-lisp files?

Is it possible to find/jump/point to where an Emacs LISP variable is used/defined within the current file? I know about find-variable, describe-variable and find-symbol, but those all seem to work ...
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18 views

Definition and usage of colors [duplicate]

I'm trying to define a color set (from material color) in order to be able to easily change the set I want to use. I think I've managed to define them but then, I'm not able to use them properly. I ...
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1answer
152 views

defun removes function in spacemacs config

I re-defined the function org-archive-subtree to call another function as described in the function below. I did this in spacemacs/user-config, now I can't call org-archive-subtree and C-h v (describe ...
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1answer
422 views

Setq doesn't work [duplicate]

Glad that the title got your attention :D I have this little snippet that's driving me crazy: (defvar cache '(nil . nil)) (defun init-cache () (setq cache '(nil . nil))) (defun save (value) (...
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1answer
114 views

Why does :command argument of make-process not work when string passed as a variable? [duplicate]

This works fine: (make-process :name "my-proc2" :buffer " *my-proc2*" :command '("sh" "-c" "echo \"hi\"\nsleep 10\necho \"there\"") :connection-type 'pipe :...
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0answers
40 views

helm-comint-input-ring - get error: shell-mode-map

windows 10, emacs 26.1, helm 3.0 I use C-c C-l (comint-dynamic-list-input-ring) I get something like this: But I don't like this. I want to use helm-comint-input-ring. I want to get something like ...
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2answers
616 views

When I start Emacs: Symbol's value as variable is void: shell-mode-map [duplicate]

System: Windows 10, Emacs 26.1, Helm 3.0 In my init.el: ;; Shell commands history (define-key shell-mode-map (kbd "C-c C-l") 'helm-comint-input-ring) When I start Emacs I get the following error: ...
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1answer
1k views

elisp: What does “setf” do?

I read the official documentation. Here's what not clear: Scope: If I do a setf in a function, is that visible in another function. Undo: How do I undo it. in ruby, you can do def myfunc a = "...
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2answers
5k views

what does “let*” ( let asterisk) mean in elisp

I've used let before, but never used let* what does let* ( let asterisk) mean in elisp? fyi this one was hard to google because of the asterisk.
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1answer
324 views

How do you pass a variable in to a lambda?

How can I pass a stringvariable in to this function, so that instead of printing "This is a test", it prints "This is a value-of-variable" (async-start ;; What to do in the child process (...
4
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1answer
67 views

Per-host background colour

Having got a bunch of custom colors defined (thanks to Drew), I need to use them to customize the background color per host. I have named the colors after the hostname, eg (setq pentacle "#314159") (...
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2answers
386 views

Bind function to variable and evaluate each time variable is referenced

I want to set a variable to a function that is run every time the variable is used. Like Lazy set in a makefile (setq counter 0) (setq counter (+ 1 counter)) counter ; actual: 1 wanted: 1 counter ; ...
2
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1answer
168 views

Make a variable visible to some functions only

Consider the following metacode: ;;; -*- lexical-binding: t -*- (defvar var1 ...) (defvar var2 ...) (defun main () "Main entry point" ...) (defun func1 ...) (defun func2 ...) ... (defun funcn ...)...