Owen Smith orls

Why Functional Programming Matters

###John Hughes, Institutionen f ̈or Datavetenskap, Chalmers Tekniska H ̈ogskola, 41296 G ̈oteborg, SWEDEN. [email protected]

This paper dates from 1984, and circulated as a Chalmers memo for many years. Slightly revised versions appeared in 1989 and 1990 as [Hug90] and [Hug89]. This version is based on the original Chalmers memo nroff source, lightly edited for LaTeX and to bring it closer to the published versions, and with one or two errors corrected. Please excuse the slightly old-fashioned type-setting, and the fact that the examples are not in Haskell!

##Abstract

As software becomes more and more complex, it is more and more important to structure it well. Well-structured software is easy to write, easy to debug, and provides a collection of modules that can be re-used to reduce future programming costs. Conventional languages place conceptual limits on the way problems can be modularised. Functional languages push those limits back. In this paper we show that t

How to figure out numbers of buckets

Rough way to determine number of buckets/classes to split a dataset into, for frequency distribution analysis / histograms:

2ⁿ⁻¹ < α < 2ⁿ

where α is the size of the dataset.

In other words, find a power of 2 that yields a number just larger than the size of your dataset. Decrementing this power would yield a number smaller.

Below content is authored by Darian Shirazi for forbes.com -- I'm just saving it for the record/sharing post-removal

Why Dun & Bradstreet's Monopoly Has Stifled Innovation For 100 Years (Part 1 Of 2)

Original from forbes.com 2013-08-19 13:43. Retrieved from yahoo cache 2013-08-22 00:20

From the movie Boiler Room: "Hey these are the D&B cards. These are our leads...These are good leads. People on these cards buy stock."

1

    std::set phoenix;
    phoenix.key_comp();

http://www.imdb.com/title/tt0373889

2

Click to add nodes! Nodes near the cursor will be linked to the new node.

D3's force layout uses the Barnes–Hut approximation to compute repulsive charge forces between all nodes efficiently. Links are implemented as geometric constraints on top of position Verlet integration, offering greater stability. A virtual spring between each node and the center of the chart prevents nodes from drifting into space.

	#!/usr/bin/env ruby
	require 'oyster'

	spec = Oyster.spec do
	name "tsp -- Generate 1x1 PNG files with a particular background colour and opacity"

	description <<-EOS
	tsp is a command-line utility for generating 1x1 pixel PNG files with a given
	background colour and opacity. Due to the relative lack of support for RGBA
	amongst web browsers, it's useful to be able to generate background images

	var fs = require('fs');
	var http = require('http');
	var path = require('path');
	var console = require('sys');
	var url = require('url');

	var Script = process.binding('evals').Script;
	var couchURL = url.parse(process.argv[2]),
	couchUser = process.argv[3],
	couchPass = process.argv[4],

	<?php

	namespace CHH;

	trait MetaObject
	{
	protected static $metaClass;

	static function setMetaClass(MetaClass $metaClass)
	{

	import java.net.InetSocketAddress;

	public class TestDns {
	public static void main(String[] args) {

	System.out.println(sun.net.InetAddressCachePolicy.get());

	InetSocketAddress unresolved = InetSocketAddress.createUnresolved("10.228.174.223", 8020);
	System.out.println(unresolved.toString()); // prints 10.228.174.223:8020
	System.out.println(unresolved.getHostName()); // prints 10.228.174.223:8020

	"""Provides a utility to inject environment variables into argparse definitions.
	Currently requires explicit naming of env vars to check for"""

	import argparse
	import os

	# Courtesy of http://stackoverflow.com/a/10551190 with env-var retrieval fixed
	class EnvDefault(argparse.Action):
	"""An argparse action class that auto-sets missing default values from env
	vars. Defaults to requiring the argument."""