reednj

Multiplication from Scratch

Imagine you need to implement (integer) mulitplication in code. Maybe you are on a system which doesn't have it or something. How to do this, and what is the minimal set of operators that are required?

Repeated addition

The most obvious way to do multiplition is through repeated addition. To get the answer to 56 x 67 you add 56 to itself 67 times (or 67, 56 times - the order doesn't matter).

This is simple to implement if we assume for the moment that both a and b are positive (we will deal with negative integers later)

reednj

aback
abase
abate
abbey
abbot
abhor
abide
abled
abode
abort

reednj

#!/usr/bin/env ruby
#
# screens.rb
# @reednj, 2016-12-06
#
# This script will take a screenshot of the desktop on up to two monitors, and save it in the
# given location (usually Dropbox). It will only take a screenshot if the user is active.
#
# If there is already a screenshot that exists for that day, it will _sometimes_ overwrite it
# and make a new one. This is an attempt to get a screenshot at a random time each day.

reednj

class Object
	def is_a!(t, name = nil)
		if !is_a? t
			if name.nil?
				raise "expected #{t} but got #{self.class}"
			else
				raise "#{name} requires #{t} but got #{self.class}"
			end
		end
	end

reednj

#!/bin/sh

# create a gem templete
bundle gem gem_name_goes_here

# run the unit tests
bundle exec rake test

# upload the gem to rubygems
bundle exec rake release

reednj

def benchmark(count = 1, &block)
	start = Time.now
	
	count.times do |i|
		yield
	end
	
	duration = Time.now - start
	per_sec = count / duration
	

reednj

class WorkerThread
	def initialize

	end

	def start(options = nil)
		raise 'background_task needs a block' unless block_given?

		options ||= {}

reednj

colors used in paint on windows 7

row one

• #000000
• #7F7F7F
• #880015
• #ED1C24
• #FF7F27
• #FFF200

reednj

// The MIT License (MIT)
//
// Copyright (c) 2013, Nathan Reed
//
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to deal
// in the Software without restriction, including without limitation the rights
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:

reednj

using System;
using System.Collections.Generic;
using System.Text;

namespace Temp
{
    class Program
    {
        static void Main(string[] args)
        {