Pym Pym

Enterprise Rails

   WAT?

Lyon.rb - Octobre 2012

Philippe Creux - @pcreux - http://pcreux.com

One of my favorite past times is to look at the notebooks of famous scientists. Da Vinci's notebook is well known, but there plenty others. Worshipping Da Vinci like no other, I bought a Think/Create/Record journal, used it mostly to keep jot down random thoughts and take notes. This was great in the beginning, but the conformity of lines drove me nuts. Only moleskines made blank notebooks, so I had to buy one.

At the same time I started a freelance project. The project itself is irrelevant, but suffice to say it was very complex and spanned several months. It seemed like a perfect opportunity to use the moleskine. Looking back, all my entries fell under few categories:

Todo
Question
Thought
Bug
Feature

	#!/bin/bash

	# Sync Homebrew installations between Macs via Dropbox
	#

	BREW="/usr/local/bin/brew"

	# first get local settings
	echo "Reading local settings ..."
	rm -f /tmp/brew-sync.*

	# If you're having cert issues on ruby 2.0.0-p0, the issue is most likely that ruby can't
	# find the required intermediate certificates. If you built it via rbenv/ruby-build, then
	# the certs are already on your system, just not where ruby expects them to be.

	# When ruby-build installs openssl, it installs the CA certs here:
	~/.rbenv/versions/2.0.0-p0/openssl/ssl/cacert.pem

	# Ruby is expecting them here:
	$(ruby -ropenssl -e 'puts OpenSSL::X509::DEFAULT_CERT_FILE')
	# Which for me, is this path:

	<html>
	<head></head>
	<body>
	<canvas id="canvas" width="800" height="600"></canvas>

	<script>

	var canvas = document.getElementById("canvas").getContext('2d');

	canvas.shadowColor="#000";

	$stack, $draws = [], {}

	def method_missing *args
	return if args[0][/^to_/]
	$stack << args.map { \|a\| a or $stack.pop }
	$draws[$stack.pop(2)[0][0]] = args[1] if args[0] == :<
	end

	class Array
	def +@

	;; based on core.logic 0.8-alpha2 or core.logic master branch

	(ns sudoku
	(:refer-clojure :exclude [==])
	(:use clojure.core.logic))

	(defn get-square [rows x y]
	(for [x (range x (+ x 3))
	y (range y (+ y 3))]
	(get-in rows [x y])))

	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

	var parser = document.createElement('a');
	parser.href = "http://example.com:3000/pathname/?search=test#hash";

	parser.protocol; // => "http:"
	parser.hostname; // => "example.com"
	parser.port; // => "3000"
	parser.pathname; // => "/pathname/"
	parser.search; // => "?search=test"
	parser.hash; // => "#hash"
	parser.host; // => "example.com:3000"

	#!/usr/bin/env sh

	##
	# This is script with usefull tips taken from:
	# https://github.com/mathiasbynens/dotfiles/blob/master/.osx
	#
	# install it:
	# curl -sL https://raw.github.com/gist/2108403/hack.sh \| sh
	#