Changsheng Wu Congee

macOS Internals

Understand your Mac and iPhone more deeply by tracing the evolution of Mac OS X from prelease to Swift. John Siracusa delivers the details.

Starting Points

How to use this gist

You've got two main options:

An Opinionated Comparison of Software Design Approaches in Haskell

Installing tmux-256color for macOS

macOS 10.15.5
tmux 3.1b

macOS has ncurses version 5.7 which does not ship the terminfo description for tmux. There're two ways that can help you to solve this problem.

The Fast Blazing Solution

Instead of tmux-256color, use screen-256color which comes with system. Place this command into ~/.tmux.conf or ~/.config/tmux/tmux.conf(for version 3.1 and later):

Linux Kernel Modules for NixOS

You can find what kernel modules are loaded using lsmod.

However some kernel modules are required at stage 1 boot. Basically preloaded in the initial ram disk before switching to the root filesystem. These kernel modules are mostly needed to deal with peripherals, storage devices, filesystems and network devices. You may need to be wary of these required modules:

sd_mod - SCSI, SATA, and PATA (IDE) devices

High-Performance Matrix Multiplication

This is a short post that explains how to write a high-performance matrix multiplication program on modern processors. In this tutorial I will use a single core of the Skylake-client CPU with AVX2, but the principles in this post also apply to other processors with different instruction sets (such as AVX512).

Intro

Matrix multiplication is a mathematical operation that defines the product of

	var jsonData = pm.response.json();
	pm.environment.set("jwt", jsonData.access_token);

	function parseJwt (token,part) {
	var base64Url = token.split('.')[part];
	var words = CryptoJS.enc.Base64.parse(base64Url);
	var jsonPayload = CryptoJS.enc.Utf8.stringify(words);
	return JSON.parse(jsonPayload);
	};

	{ stdenv, fetchzip, pkgconfig, ffmpeg, gtk2-x11, libjpeg }:

	stdenv.mkDerivation rec {
	pname = "droidcam";
	version = "0";

	src = fetchzip {
	url = "https://github.com/aramg/droidcam/archive/b49842a02611f8ddc6b9342ef74e299abd1c4090.zip";
	sha256 = "05kd5ihwb3fldmalv67jgpw4x0z0q39lfis69r7yh03qiqlviymk";
	};

	function! Sort(type, ...)
	'[,']sort
	endfunction
	nmap <silent> <key> :set opfunc=Sort<CR>g@

	" usage:
	" <key>ip
	" <key>G

	body
	{
	margin-top: 1px;
	margin-right: 3px;
	margin-left: 2px;
	margin-bottom: 3px;
	background: #201F1F;
	color: white;
	font-family: Bookerly, Segoe UI, Palatino Linotype, Arial Unicode MS;
	}