You can take the same source code package that Ubuntu uses to build jq, compile it again, and realize 90% better performance.
I use jq for processing GeoJSON files and other open data offered in JSON format. Today I am working with a 500MB GeoJSON file that contains the Alameda County Assessor's parcel map. I want to run a query that prints the city for every parcel worth more than a threshold amount. The program is
Somehow my BTRFS file system became corrupted by what appears to be a single bit flip in a metadata field. Rather than copying all the data and reformatting the file system, which would have required another disk at least as large as the original, I decided to try to fix this manually, which appears to have worked. I've documented the procedure I've used here, in case I need it again or someone else runs into a similar issue and finds it useful.
The first thing you should do is run btrfs check. For me this produced the following output:
Opening filesystem to check...
Checking filesystem on /dev/nvme0n1p1
UUID: ec7afe1c-8478-450a-82fc-d17b32d8ca3d
Minimal script to quickly update hosts file from a filter list.
Note that this does not replace the entirety of the hosts file, so previous customizations will remain intact.
Download the update_hosts script below or run:
$ curl --proto "=https" --tlsv1.2 https://gist.githubusercontent.com/metametapod/4c4a7a9c888343fc6e722f8ed77aa763/raw/update_hosts -o update_hosts
The target audience for this is people who are beginners at software engineering and using linux. A lot of the information here may be obvious or already known to you. The language involved is C but you do not need to know any C to read this tutorial. I used mg to write this blog post. I used vs code to edit the source code.
This post is also available on gopher://tilde.team:70/0/~river/tweak-free-software
If you use a piece of free software and it's 99% perfect but there's just this one thing it does that annoys the hell out of you.. you can in theory just fix it! Here's a look at what doing that is like. Hopefully it inspires you, or you pick up a could tricks on the way!
| # IDA (disassembler) and Hex-Rays (decompiler) plugin for Apple AMX | |
| # | |
| # WIP research. (This was edited to add more info after someone posted it to | |
| # Hacker News. Click "Revisions" to see full changes.) | |
| # | |
| # Copyright (c) 2020 dougallj | |
| # Based on Python port of VMX intrinsics plugin: | |
| # Copyright (c) 2019 w4kfu - Synacktiv |
Here's a list of mildly interesting things about the C language that I learned mostly by consuming Clang's ASTs. Although surprises are getting sparser, I might continue to update this document over time.
There are many more mildly interesting features of C++, but the language is literally known for being weird, whereas C is usually considered smaller and simpler, so this is (almost) only about C.
struct foo {
struct bar {
int x;
A list of useful commands for the FFmpeg command line tool.
Download FFmpeg: https://www.ffmpeg.org/download.html
Full documentation: https://www.ffmpeg.org/ffmpeg.html
Instructions how to install Debian using debootstrap. Below instructions were verified to work with debootstrapping Debian 11.
| /** | |
| * jQuery Plugin to obtain touch gestures from iPhone, iPod Touch and iPad, should also work with Android mobile phones (not tested yet!) | |
| * Common usage: wipe images (left and right to show the previous or next image) | |
| * | |
| * @author Andreas Waltl, netCU Internetagentur (http://www.netcu.de) | |
| * @version 1.1.1 (9th December 2010) - fix bug (older IE's had problems) | |
| * @version 1.1 (1st September 2010) - support wipe up and wipe down | |
| * @version 1.0 (15th July 2010) | |
| */ | |
| (function($) { |