zweizeiler

Hofstadter on Lisp

In the mid-80s, while reading through my roommate's collection of Scientific American back issues, I encountered this introduction to Lisp written by Douglas Hofstadter. I found it very charming at the time, and provide it here (somewhat illegally) for the edification of a new generation of Lispers.

In a testament to the timelessness of Lisp, you can still run all the examples below in emacs if you install these aliases:

(defalias 'plus #'+)
(defalias 'quotient #'/)
(defalias 'times #'*)
(defalias 'difference #'-)

Step 1 - Make a Discord Webhook

Find the Discord channel in which you would like to send commits and other updates
In the settings for that channel, find the Webhooks option and create a new webhook. Note: Do NOT give this URL out to the public. Anyone or service can post messages to this channel, without even needing to be in the server. Keep it safe!

Step 2 - Set up the webhook on Github

Navigate to your repository on Github, and open the Settings

A non-exhaustive list of WebGL and WebGPU frameworks and libraries. It is mostly for learning purposes as some of the libraries listed are wip/outdated/not maintained anymore.

Engines and libraries ⚙️

Name	Stars	Last Commit	Description
three.js	![GitHub

Swift Concurrency Manifesto

Author: Chris Lattner

Chinese Translation by Jason Yu

How To Use GitHub Gists For Publishing Articles

GitHub Gists may be used not only for code snippets sharing but as a publishing platform for your articles.

Features And Restrictions Of GitHub Gists

Each gist is a git repo with restrictions and features:

You can't create folders in any branch of the repo.
Each file in the master branch larger than 1MB risks to be truncated so you can't add zip archive to master. But you may keep additional large files at another branches which can't be viewed on the gist page.
If you want to use images in your article but wish non-embedded images to be hidden on the gist page then you may keep them in non-master branch and reference by .//raw//foobar.jpg.

short url: caseywatts.com/selfpublish

my book is out! an applied psychology / self-help book targeted at developers: Debugging Your Brain

Markdown --> PDF (as a booklet!)

Markdown --> EPUB and MOBI

	Latency Comparison Numbers (~2012)
	----------------------------------
	L1 cache reference 0.5 ns
	Branch mispredict 5 ns
	L2 cache reference 7 ns 14x L1 cache
	Mutex lock/unlock 25 ns
	Main memory reference 100 ns 20x L2 cache, 200x L1 cache
	Compress 1K bytes with Zippy 3,000 ns 3 us
	Send 1K bytes over 1 Gbps network 10,000 ns 10 us
	Read 4K randomly from SSD* 150,000 ns 150 us ~1GB/sec SSD

	/*
	Makefile:
	(make sure Makefile is indented using a tab and not spaces)

	all:
	cc -Wall -g -O0 rdb_mergeop.c -o rdb_mergeop -lstdc++ -lrocksdb -lsnappy -lbz2 -llz4 -lz
	clean:
	rm -rf rdb_mergeop
	rm -rf testdb
	*/

	#!/usr/local/bin/python3
	"""
	This script should idempotently grab the stuff that's newly added to Pocket to pocket.md

	You'll need to install https://airtable-python-wrapper.readthedocs.io, i.e. via:

	$ pip3 install airtable-python-wrapper

	and, of course, sign up for an Airtable account (free seems to work fine).
	"""