thatrubylove’s gists

thatrubylove / lambda_fun.rb

Created November 22, 2013 18:47

lambda example for 2013-11-20-welcome-to-ruby-love-a-blog-where-we-love-ruby

	# Functional coding in Ruby - better than chunky bacon
	print_to_console = ->(msg) { puts msg }
	print_to_motd_file = ->(msg) { File.write("motd.txt", msg) }

	# Display the "message of the day" via the selected printer
	motd = ->(printer) {
	msg = ["Hello World,\n",
	" Sincerely,\n",
	" thatrubylove"].join
	printer.(msg)

thatrubylove / 6.rb

Last active December 29, 2015 07:29

Solution for problem #6 @ http://projecteuler.net/problem=6

	sum = ->(num_list) { num_list.reduce(:+) }
	square = ->(number ) { number * number }
	squares = ->(num_list) { num_list.map {\|num\| square.(num) } }
	sum_squares = ->(num_list) { sum.(squares.(num_list)) }
	square_sum = ->(num_list) { square.(sum.(num_list)) }

	gem 'minitest'
	require 'minitest/autorun'

	describe "sum_squares" do

thatrubylove / benchmarks.json

Created December 21, 2013 19:28

Interesting results from benchmarking

	[
	{:type=>"Functional::Lists::SinglyLinked", :operation=>"#plus", :sample_size=>10000, :benchmark=>0.116519289},
	{:type=>"Functional::Lists::SinglyLinked", :operation=>"#plus", :sample_size=>50000, :benchmark=>0.557987583},
	{:type=>"Functional::Lists::SinglyLinked", :operation=>"#plus", :sample_size=>750000, :benchmark=>18.900261197},
	{:type=>"Functional::Lists::SinglyLinked", :operation=>"#plus", :sample_size=>2000000, :benchmark=>145.656489316}
	],
	[
	{:type=>"Array", :operation=>"#plus", :sample_size=>10000, :benchmark=>1.640012864},
	{:type=>"Array", :operation=>"#plus", :sample_size=>50000, :benchmark=>5.108800796},
	{:type=>"Array", :operation=>"#plus", :sample_size=>750000, :benchmark=>71.655338726},

thatrubylove / CPU Bench

Created December 22, 2013 19:18

Array vs LinkedList show down

thatrubylove / card_deck.rb

Created March 28, 2014 18:08

Functional/OO Deck of Cards in Ruby - Start of a series of articles for rubylove.io

	Rank = Struct.new(:rank, :value) do
	def to_s; rank; end
	end

	Card = Struct.new(:rank, :suit) do
	def to_s; "#{rank} of #{suit}"; end
	end

	class Deck
	SUITS = %w(hearts clubs spades diamonds)

thatrubylove / poly-over-cond.rb

Created April 1, 2014 18:18

Polymorphism over conditionals

	# Conditional reach-around

	User = Struct.new(:name, :role) do; end

	def greet(user)
	if user.name && user.role
	"Hello, I am an #{user.role} user. My name is #{user.name}."
	elsif user.name
	"Hello, my name is #{user.name}."
	else

thatrubylove / string_primitive_deck.rb

Created April 2, 2014 08:48

one liner magic - but it is primitive obsessed with a string

DECK = %w[Ace 2 3 4 5 6 7 8 9 10 Jack Queen King].product(%w[Clubs Diamonds Hearts Spades]).map {|rank, suit| "#{rank} of #{suit}" }

thatrubylove / example-1.rb

Last active August 29, 2015 13:59

tdding-patshaughnessys-ask-dont-tell

	require 'minitest/autorun'

	describe "#lines_after_word(lines, target)" do
	let(:file) { File.expand_path("../innisfree.txt", __FILE__) }
	let(:lines) { File.readlines(file) }

	it "must return an empty array if no lines include the target word" do
	lines_after_word(lines, "hola").must_equal []
	end
	end

thatrubylove / example-2.rb

Created April 16, 2014 02:38

tdding-patshaughnessys-ask-dont-tell - example-2.rb

	def lines_after_word(lines, target)
	index = lines.find_index {\|line\| line =~ /#{target}/ }
	index.nil? ? [] : ""
	end

thatrubylove / example-3.rb

Created April 16, 2014 02:41

tdding-patshaughnessys-ask-dont-tell-example-3.rb

	require 'minitest/autorun'

	describe "#lines_after_word(lines, target)" do
	let(:lines) { File.readlines(File.expand_path("../innisfree.txt", __FILE__)) }

	it "must return all the lines if the first line includes the target word" do
	lines_after_word(lines, "Innisfree").count.must_equal lines.count
	end
	end

Jim OKelly thatrubylove