Dominic Muller domgetter

domgetter / cards.rb

Created July 7, 2014 04:59

	class PokerHandRank

	RANKS = %w(high pair tpair trip stright flush full four royal)

	def initialize(hand)
	@hand = hand
	end

	def flush?
	@hand.suits.any? {\|k, v\| v >= 5 }

domgetter / ar.rb

Created July 7, 2014 17:33

	names = Car.uniq.pluck(:name)
	wheel_counts = Car.uniq.pluck(:wheels)

	groups = []

	names.each do \|name\|
	wheel_counts.each do \|wheel_count\|
	groups << Car.where(name: name, wheel: wheel_count)
	end
	end

domgetter / gist:ef33b6ea7f98b6aa5b4f

Created July 15, 2014 20:17

	> vi spec/controllers/users_controller_spec.rb
	> rspec spec/controllers/users_controller_spec.rb

domgetter / gist:62731a609f221507fd3e

Created July 15, 2014 20:21

domgetter / users_controller_spec.rb

Last active August 29, 2015 14:04

	require 'rails_helper'

	RSpec.describe UsersController, :type => :controller do

	describe "GET 'index'" do
	it "returns http success" do
	get 'index'
	expect(response).to be_success
	end
	end

domgetter / challenge_output.txt

Created July 16, 2014 23:08

domgetter / inspect.rb

Created July 23, 2014 02:19

	# here's what Array would output from inspect if it wasn't overridden:

	class Array
	def inspect
	"<##{self.class}:" + "0" + "x" + "#{self.object_id.to_s(16)}>"
	end
	end

	[1,2,3].inspect
	=> "<#Array:0x1491570>"

domgetter / ffi_callback_segfault.rb

Created July 28, 2014 09:29

Segmentation Fault example from waveOutProc callback for waveOutOpen windows multimedia function.

	require 'ffi'

	class HWAVEOUT < FFI::Struct
	layout :i, :int
	end

	class WAVEFORMATEX < FFI::Struct
	def initialize
	self[:wFormatTag] = 1
	self[:nChannels] = 1

domgetter / segfault_console_output

Created July 28, 2014 09:34

ffi callback segfault console output

	waveOutOpen returns 0 (no error) if I don't use the callback form
	0
	but if I use a callback, the moment it returns from the callback, there is a seg fault
	note that the code inside the callback runs, as I am puts-ing the mMsg which is 955
	for WOM_OPEN which tells us the device was opened.
	this is on ruby 1.9.3p484 (2013-11-22) [i386-mingw32] running 1.9.3 x86-mingw32 on
	Windows 7
	955
	sound.rb:67: [BUG] Segmentation fault
	ruby 1.9.3p484 (2013-11-22) [i386-mingw32]

domgetter / IEEE754.rb

Last active August 29, 2015 14:04

convert float to bits

	bits = eval("0x" + [0.15625].pack('g').unpack('H16')[0]).to_s(2).rjust(32,"0")
	#=> "00111110001000000000000000000000"
	# these are the bits of 0.15625 represented as a single precision float
	sign = bits[0]
	#=> "0"
	exponent = bits[1..8]
	#=> "01111100"
	mantissa = bits[9..32]
	#=> "01000000000000000000000"
	sign = sign.to_i == 0 ? 1 : -1