26 lines
1.0 KiB
Markdown
26 lines
1.0 KiB
Markdown
---
|
||
layout: post
|
||
title: "Rounding numbers to N decimals in Emacs"
|
||
date: 2014-10-07 10:28:50+00:00
|
||
tags: [emacs, development]
|
||
permalink: /blog/2014/10/7/rounding-numbers-to-n-decimals-in-emacs
|
||
published: true
|
||
author:
|
||
name: Gergely Polonkai
|
||
email: gergely@polonkai.eu
|
||
---
|
||
|
||
I have recently faced a problem, where I had a bunch of SVG files with a
|
||
large amount of fraction numbers in the path definitions. These images were
|
||
displayed in small size, so this amount of precision was irrelevant, and
|
||
these numbers took almost half of my SVG images’ size. So I created an
|
||
Elisp defun to round these numbers to 2 decimals:
|
||
|
||
{% gist gergelypolonkai/9c721ceda6d3079b4f05 %}
|
||
|
||
This finds the first digit of the number under point (the cursor), and
|
||
reduces its digits to the given amount (or the number given with `C-u`). It
|
||
has some drawbacks, though, as it cannot handle exponential forms (e.g.
|
||
`1e-1234`), but these were rare in my case, and its hard to iterate through
|
||
all numbers. I will come over this latter problem soon(ish).
|