SirJson

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.

1. Combined type and variable/field declaration, inside a struct scope [https://godbolt.org/g/Rh94Go]

struct foo {
   struct bar {
 int x;

SirJson

#!/bin/bash

I3CFG="$HOME/.config/i3/config"
STYLE=$(i3-style -l | sed -e 's/\s[-].*//' | sed -e 's/Available themes://' | tr -d '[:cntrl:]' | tr -s '[:blank:]' '\n' | tail -n +2 | dmenu)

i3-style $STYLE -o $I3CFG -r

SirJson

// You only need the developer console for this. JS rocks!.. sometimes

document.querySelectorAll(".useragent").forEach(x => console.log('"'+x.childNodes[0].innerHTML+'"'))

SirJson

#!/bin/bash

# The first line is the data source you are looking for
# The last two lines select a random one from the array above for demostration

USERAGENTS=("Mozilla/5.0 (X11; Linux x86_64; rv:45.0) Gecko/20100101 Thunderbird/45.3.0" "Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/44.0.2403.157 Safari/537.36" "Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/42.0.2311.135 Safari/537.36" "Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:15.0) Gecko/20100101 Firefox/15.0" "Mozilla/5.0 (Unknown; Linux) AppleWebKit/538.1 (KHTML, like Gecko) Chrome/v1.0.0 Safari/538.1" "Mozilla/5.0 (X11; Linux x86_64; rv:10.0) Gecko/20150101 Firefox/47.0 (Chrome)" "Mozilla/5.0 (SMART-TV; X11; Linux armv7l) AppleWebKit/537.42 (KHTML, like Gecko) Chromium/25.0.1349.2 Chrome/25.0.1349.2 Safari/537.42" "Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML" "Mozilla/5.0 (Linux; NetCast; U) AppleWebKit/537.31 (KHTML, like Gecko) Chrome/34.0.1847.137 Safari/537.31 SmartTV/6.0

SirJson

@-moz-document domain("xkcd.com") {
  @namespace url(http://www.w3.org/1999/xhtml);
  body {
    background: #fff!important;
    width: inherit;
    position: inherit;
  }

  .box {
    background: #fff;

SirJson

#!/bin/sh
youtube-dl --prefer-free-formats --youtube-skip-dash-manifest -x --audio-format best $1

SirJson

// gcc -o drmgl Linux_DRM_OpenGLES.c `pkg-config --cflags --libs libdrm` -lgbm -lEGL -lGLESv2

/*
 * Copyright (c) 2012 Arvin Schnell <arvin.schnell@gmail.com>
 * Copyright (c) 2012 Rob Clark <rob@ti.com>
 * Copyright (c) 2017 Miouyouyou <Myy> <myy@miouyouyou.fr>
 *
 * Permission is hereby granted, free of charge, to any person obtaining a
 * copy of this software and associated documentation files (the "Software"),
 * to deal in the Software without restriction, including without limitation

SirJson

Installing i3-gaps

Dependencies

i3-gaps has some packages that are required for it to work so install these things:

sudo apt install libxcb1-dev libxcb-keysyms1-dev libpango1.0-dev libxcb-util0-dev libxcb-icccm4-dev libyajl-dev libstartup-notification0-dev libxcb-randr0-dev libev-dev libxcb-cursor-dev libxcb-xinerama0-dev libxcb-xkb-dev libxkbcommon-dev libxkbcommon-x11-dev autoconf xutils-dev libtool automake

You also need to install libxcb-xrm-dev, but I got Unable to locate package libxcb-xrm-dev when trying to install from the apt repositories on Ubuntu 16.04. If this happens to you, just install it from source using these commands:

mkdir tmp

SirJson

rPi Netboot TFTP setup

This is not a tutorial, it's some hints to get up and going. All of this assumes you are using Linux. (As you should!)

This setup will let you boot the rPi from a folder on your disk over the network. This makes life much easier if you are iterating over changes. All you need is an easy way to reboot the pi (cable with switch or a switchable power supply).

Based on documentation from rPi foundation.

SirJson

* {
    font-family: Roboto, Noto Sans, Segoe UI, Ubuntu, sans-serif;
    font-size: 12pt;
    font-weight: normal;
  }
  
  th {
    vertical-align: center;
    font-size: 10pt;
    padding-top: 8px;