digit-groups Emacs package adds the
minor mode, which makes it easier to read large numbers by
highlighting digits at selected place-value positions (e.g.,
thousands place, millions place, billions place, etc.).
The default configuration formats in bold every other group of
three digits. So, for example, in
digits 3, 4, 5 and 9 are highlighted both before and after the
.). This makes it easy to find the place-value
positions for thousands, millions, billions, and so forth.
To use this package, enable the
digit-groups-mode minor mode in
the buffers in which you wish to use it, or to enable it for all
The default configuration highlights digits by making them bold.
This can be changed by customizing
or you can highlight different positions with different faces by
The default configuration highlights every other group of three
digits between the novemdecillionths (10^-60) position and the
novemdecillions (10^60) position with the exception of the
units (10^0) position. This can be changed by customizing
Changes to the configuration take effect only when the
digit-groups-mode minor mode is being turned on. Thus, you may
need to toggle the mode off and on again in affected buffers
before you see the effect of any configuration changes.
The source code for this package is available at:
This package is licensed under the MIT license. See the LICENSE file in the
Install the package files
Option 1 (preferred): Install from MELPA
Enable installation of packages from MELPA
Launch Emacs's package manager from the menu with
Options -> Manage Emacs Packagesor manually with
digit-groupspackage for installation.
Option 2: Install manually
Download the source code with:
hg clone ssh://email@example.com/adamsmd/digit-groups
digit-groups.elinto a directory in your
Load the package by either running
manually or adding the following to your
.emacs. (If you don't
after-init-hook, you may get an error when
(add-hook 'after-init-hook (lambda () (require 'digit-groups)))
digit-groups-modeminor mode in the buffers in which you wish
to use it, or to enable it for all buffers, customize
Since the regular expression for matching the selected place-value positions
is computed only when turning on the minor mode, you need to toggle the mode
off and on again in affected buffers before you see the effect of
configuration changes to
Due to how
font-lockworks, this package can highlight only a fixed number
of place-value positions. Thus, the default configuration goes only between
10^-60 and 10^60.
Due to how regular expressions work on Emacs, this package doesn't support
Unicode digits. They are treated as non-digits.
Due to how
font-lockand regular expressions work in Emacs, this package
may prevent highlighting that
font-lockwould normally do to the first
non-digit character after a sequence of digits.
I am looking for someone to take over maintenance of this package.
I am not an expert on Emacs Lisp programming, so suggestions about better ways
to write or package the code are welcome.
I wrote this software to solve a particular problem that I had, and it now
solves that problem. Unfortunately, I am fairly busy and don't have much time
for feature improvements or on-going maintenance. This has a few
Suggestions, improvements, and fixes are welcome, but I may not get to them
for quite some time.
The less work I have to do to incorporate your improvement or fix, the more
quickly and more likely I will include it. The best case is a pull request
that has a good comment explaining what it does and why it should be done
and that has a simple enough diff that it is obviously correct.
I would be happy to turn over maintenance of this package to someone
qualified who is in a better position to do on-going maintenance than I.