Jan Wrobel wrr

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 #'-)

Mathematics: What do grad students in math do all day?

by Yasha Berchenko-Kogan

A lot of math grad school is reading books and papers and trying to understand what's going on. The difficulty is that reading math is not like reading a mystery thriller, and it's not even like reading a history book or a New York Times article.

The main issue is that, by the time you get to the frontiers of math, the words to describe the concepts don't really exist yet. Communicating these ideas is a bit like trying to explain a vacuum cleaner to someone who has never seen one, except you're only allowed to use words that are four letters long or shorter.

What can you say?

Getting Started with NPM (as a developer)

As easy as 1, 2, 3!

Updated:

Aug, 08, 2022 update config docs for npm 8+
Jul 27, 2021 add private scopes
Jul 22, 2021 add dist tags
Jun 20, 2021 update for --access=public
Sep 07, 2020 update docs for npm version

	<!DOCTYPE html>
	<!-- By Jan Wrobel. See it working at:
	http://mixedbit.org/blog/2013/02/10/random_walk_illustrated_with_d3.html
	-->

	<html>

	<head>
	<meta http-equiv="Content-Type" content="text/html;charset=utf-8">
	<title>Random walk</title>

	require 'rack'
	require 'rack/proxy' #gem install rack-proxy

	class Proxy < Rack::Proxy
	def rewrite_env(env)
	env["HTTP_HOST"] = "my.host.com"
	env["SERVER_PORT"] = "80"
	env
	end
	end

	require "net/http"
	require "enumerator"

	# Example Usage:
	#
	# use Rack::Proxy do \|req\|
	# if req.path =~ %r{^/remote/service.php$}
	# URI.parse("http://remote-service-provider.com/service-end-point.php?#{req.query}")
	# end
	# end