- #NOT EQUAL SYMBOL SPACEMACS HOW TO#
- #NOT EQUAL SYMBOL SPACEMACS MANUAL#
- #NOT EQUAL SYMBOL SPACEMACS CODE#
#NOT EQUAL SYMBOL SPACEMACS CODE#
Alternatively, people use various versions of csetq macros in their configs to automatically take care of this (you can use GitHub code search to discover more sophisticated variants if you like): (defmacro csetq (sym val) To set such an option correctly with Elisp, you need to use the function customize-set-variable. If you use setq in your init file, to change the value of such an option, the setter function will not run. If you evaluate this code and change the value using the customize interface with M-x customize-option RET my-option RET the lambda will be called, and the message in the echo area will tell you the symbol and value of the option. One detail many users aren't aware of is that setting user options with customize might execute code, and this is sometimes used to run additional setup instructions: (defcustom my-option t
#NOT EQUAL SYMBOL SPACEMACS HOW TO#
Once you know how to set variables in your init file, there's no compelling reason to use it. As far as I know, most people don't use it much because it feels clunky. Unlike variables declared with defvar, such a variable is configurable with the M-x customize interface. User optionsĪ user option is simply a global variable that is declared with defcustom. If the declarations in those files reset variables to their default value, this would override any settings in your init. This behavior is intentional: As you might know, many features in Emacs load only on demand (i.e., they are autoloaded). This way, you can enforce setting the value if you need to. Note that there is one exception: If you evaluate the declaration above with C-M-x that calls eval-defun, the value will be reset to t. For example, if you establish a binding for my-var in your init file like this: (setq my-var nil)Įvaluating the following form won't reset the variable to t: (defvar my-var t) One important aspect of variables declared by defcustom or defvar is that reevaluating them won't reset a variable if it is already bound. User options defined with defcustom and variables defined with defvar or defconst are global. This article is my attempt to respond to that-to give readers a good grasp of the basics so they can use them for their configuration and make it easier for people to look up some detail in the manual. But many people want resources that explain Elisp concepts at a higher level and reduce the amount of information to the most useful bits.
#NOT EQUAL SYMBOL SPACEMACS MANUAL#
The Elisp manual includes everything there is to know, but it is written for people who already know what they are looking for (and it is really great for that). The examples also assume you use a fairly recent Emacs version ( v.25 or later). Ideally, you should also have heard of variable scope and how it works in another programming language. This article assumes you're familiar with common Emacs terminology and that you know how to read and evaluate basic snippets of Elisp code. If you're new to Emacs, visit Sacha Chua's excellent list of resources for Emacs beginners. eBook: An introduction to programming with Bash.Try for free: Red Hat Learning Subscription.
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