lpar’s gists

lpar / godel.rb

Created November 3, 2011 14:05

Simple Gödel encoding and decoding

	#!/usr/bin/env ruby
	# encoding: UTF-8
	#
	# Simple Gödel encoding
	# Ruby 1.9.3

	require 'prime'

	# Allowed characters
	CHARS = ' ABCDEFGHIJKLMNOPQRSTUVWXYZ'

lpar / SubClass.java

Created November 15, 2011 21:58

Java field initialization weirdness with primitive values

	public class SubClass extends SuperClass {

	protected int myValue = 69;

	public SubClass() {
	// You might think that field initialization will have been performed before this constructor is executed.
	super();
	// However, Java doesn't actually perform all the field initialization for this object until this point in the code.
	// Note also that there's nothing in the source code to say that initialization happens here.
	System.out.println("Subclass constructor continuing");

lpar / forkboy.rb

Created December 23, 2011 18:54

Locate files on Mac OS X which have resource forks

	#!/usr/bin/env ruby
	# encoding: UTF-8

	# Utility for Mac OS X to locate files which have resource forks, and which
	# therefore might be corrupted by being transferred via a non-Mac filesystem.

	require 'find'

	if ARGV.length != 1
	puts "usage: forkboy <dir>"

lpar / atomizer.js

Created January 11, 2012 21:40

Atomizer: Small embeddable JavaScript web client for Atom feeds.

	/jslint browser: true, indent: 2 /

	// Atomizer: Small embeddable JavaScript web client for Atom feeds (RFC 4287).
	//
	// Generates unordered lists or tables which can be inserted anywhere on
	// the page using innerHTML.
	//
	// The Atom feed needs to be on the same hostname, port and protocol as the
	// web page, because of browser security policies.
	// See <http://en.wikipedia.org/wiki/Same_origin_policy>

lpar / index.html

Created January 19, 2012 17:51

Simple JavaScript slideshow - no frameworks, no CSS3, no Flash

	<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
	<html xmlns="http://www.w3.org/1999/xhtml">
	<head>
	<title>Slideshow demo</title>
	<script type="text/javascript" src="slideshow.js"></script>
	<style type="text/css">
	#current { position: absolute; left: 0px; top: 0px; z-index: 0; }
	#next { position: absolute; left: 640px; top: 0px; z-index: 1; }
	#slideshow { position: relative; border: solid #2b2b2b 3px; overflow: hidden; }
	</style>

lpar / example.rb

Created March 23, 2012 22:56

Brief demonstration of using character encodings in Ruby 1.9

	#!/usr/bin/env ruby
	# encoding: UTF-8

	# Notice I set UTF-8 as the default above. As far as I'm concerned there
	# are two choices of encoding: UTF-8, and legacy crap. If I need to deal
	# with anything else I'll handle it explicitly, as in this example.

	# Open an ISO-8859-1 file.
	infile = File.open("iso88591.txt", "r:iso-8859-1")

lpar / flac2mp3.rb

Created January 26, 2013 22:58

Ruby script I use to convert FLAC files to MP3, and then copy the metadata across.

	#!/usr/bin/env ruby
	# encoding: UTF-8

	# Convert FLAC files to mp3 files, keeping metadata from the FLAC files.
	#
	# Requires that FLAC (including metaflac) and LAME tools be installed
	# and on the path.
	#
	# Takes any number of .flac files on the command line.

lpar / reader2evernote.rb

Created March 14, 2013 20:35

Google Reader to Evernote. Quick hack together of a Ruby script which will pull all your Google Reader starred items into an Evernote notebook in ENML (Evernote export format).

	#!/usr/bin/env ruby
	# encoding: UTF-8

	# Google Reader to Evernote

	# Quick hack together of a Ruby script which will pull all your Google Reader
	# starred items into an Evernote notebook in ENML (Evernote export format).
	# Requires Ruby 2.0, no other special dependencies. Should work on 1.9 but I
	# haven't tested it.
	#

lpar / ldapauth.rb

Created June 7, 2013 14:53

Example of LDAP authentication in Ruby. Written for IBM Intranet, but should easily be adaptable to other environments.

	#!/usr/bin/ruby

	# An example of BluePages / IBM Intranet Password authentication using Ruby.
	# Uses the gem ruby-ldap, a Ruby wrapper for OpenLDAP. Works with Ruby 2.0.
	#
	# To get this code to work, you must
	#
	# 1. gem install ruby-ldap
	# 2. add
	#

lpar / logreport.rb

Created June 7, 2013 19:04

Report the first 10 lines of all files on the command line, transparently decompressing .xz compressed files.

	#!/usr/bin/ruby
	# encoding: UTF-8

	# The audit team wanted to know that we were doing logging as required. As
	# evidence, they asked for a regular report consisting of the first 10 lines
	# of each daily log file. I wrote this script to automate the process.
	# If you want the last 10 lines instead, I suggest the Ruby Gem called Elif,
	# which wraps any IO object to read line by line backwards.

	LINES_OF_LOG = 10

mathew lpar