C.H. Yang cyang-el

Learn Go in ~5mins

This is inspired by A half-hour to learn Rust and Zig in 30 minutes.

Basics

Your first Go program as a classical "Hello World" is pretty simple:

First we create a workspace for our project:

Parallelism and Concurrency in Python

There should be one-- and preferably only one --obvious way to do it.

-- Tim Peters, Zen of Python

When we need our programs to run faster, the first place we often look is parallelism and concurrency. By doing more things at once, we hope for significant speed gains. Python has a number of techniques optimized for different use cases; there is no one obvious way to do it! So how do you decide the correct approach?

Here's my quick take on the primary tools for parallel execution in Python, their strengths and weaknesses. I'll focus mainly on the tools in the standard library, but I'll touch on a few third-party modules that provide interesting features.

Installation of NixOS with encrypted root

These are my notes on instaling NixOS 16.03 on a Lenovo ThinkPad X1 Carbon (4th generation) with an encrypted root file system using UEFI.

Most of this is scrambled from the following pages:

This gist lets you keep IPython notebooks in git repositories. It tells git to ignore prompt numbers and program outputs when checking that a file has changed.

To use the script, follow the instructions given in the script's docstring.

For further details, read this blogpost.

The procedure outlined here is inspired by this answer on Stack Overflow.

Each of these commands will run an ad hoc http static server in your current (or specified) directory, available at http://localhost:8000. Use this power wisely.

Discussion on reddit.

Python 2.x

$ python -m SimpleHTTPServer 8000

	#include <time.h> // Robert Nystrom
	#include <stdio.h> // @munificentbob
	#include <stdlib.h> // for Ginny
	#define r return // 2008-2019
	#define l(a, b, c, d) for (i y=a;y\
	<b; y++) for (int x = c; x < d; x++)
	typedef int i;const i H=40;const i W
	=80;i m[40][80];i g(i x){r rand()%x;
	}void cave(i s){i w=g(10)+5;i h=g(6)
	+3;i t=g(W-w-2)+1;i u=g(H-h-2)+1;l(u

	The MIT License

	Copyright © 2010-2016 three.js authors

	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 the rights
	to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
	copies of the Software, and to permit persons to whom the Software is
	furnished to do so, subject to the following conditions:

	xml2_sax_sample: xml2_sax_sample.c
	gcc -o xml2_sax_sample `xml2-config --cflags --libs` xml2_sax_sample.c

	clean:
	rm xml2_sax_sample