Contents
How does the scratch buffer work in Emacs?
The *scratch* buffer is the buffer selected upon startup, and has the major mode Lisp Interaction. Note: the mode for the *scratch* buffer is controlled by the variable initial-major-mode. In general you can create as many “scratch” buffers as you want, and name them however you choose.
How to change scratch buffer to org mode?
As to the *scratch* buffer, you can customize the initial-major-mode variable: initial-major-mode is a variable defined in ‘startup.el’. Its value is ‘lisp-interaction-mode’ Documentation: Major mode command symbol to use for the initial ‘*scratch*’ buffer. You can customize this variable.
What’s the default setting for the scratch buffer?
New buffers that are not the *scratch* buffer, should default to fundamental-mode; e.g., when calling get-buffer-create. As to the *scratch* buffer, you can customize the initial-major-mode variable: initial-major-mode is a variable defined in ‘startup.el’.
How many buffers can I create in scratch?
In general you can create as many “scratch” buffers as you want, and name them however you choose. switches to a buffer NAME, creating it if it doesn’t exist. A new buffer is not associated with a file on disk until you use C-x C-w (or M-x write-file RET) to choose a file where it should be saved.
The Emacs *scratch* buffer comes with a few useful additions over the regular Emacs-Lisp mode that makes it useful for throw-away scripts and quick code evaluation. If you put point at the end of an sexp and type C-j Emacs will evaluate the expression and print the result straight into the buffer.
How to evaluate chunks of code in Emacs?
Evaluating Chunks of Code. If you have a body of code that you want to evaluate, this approach is by far the simplest. To quickly evaluate any amount of code – from one to many forms, where a form is essentially something that Emacs can evaluate – simply yank the code into an empty buffer and run M-x eval-buffer.
How to evaluate an Elisp expression in Emacs?
If you put point at the end of an sexp and type C-j Emacs will evaluate the expression and print the result straight into the buffer. Note: If you use paredit, be aware that it rebinds the key! The scratch buffer is a poor substitute for a proper REPL, but thankfully Emacs does come with one of those too.
Can you invoke multiple expressions in Emacs scratch?
One thing you cannot do is invoke multiple expressions; to get around this, you can wrap the expressions in the progn form, like so: (progn (foo) (bar) (baz)). The Emacs *scratch* buffer comes with a few useful additions over the regular Emacs-Lisp mode that makes it useful for throw-away scripts and quick code evaluation.