EvanHahn

# Non-destructive quicksort.
# DOESN'T WORK WITH DUPLICATES. Too lazy.
# [1, 5, 8, 12].quickSort()
Array::quickSort = ->

	# Is the array already sorted by nature of its length?
	return this if @length <= 1

	# Pick a pivot as a random element.
	# This is probably not the best pivot we could choose.

EvanHahn

// Test my hypothesis that Object.is(a, b) is the same as a === b.
// Log an error if they're different.
var numTests = 0;
function test(a, b) {
	if ((Object.is(a, b)) !== (a === b)) {
		console.error('Object.is is different from === for ' + a + ' and ' + b);
	}
	numTests ++;
}

EvanHahn

# Non-destructive merge sort.
# [1, 8, 12, 5].mergeSort()
Array::mergeSort = ->

	# If the array has one element, we're done.
	return this if @length is 1

	# Split the array in half.
	halfwayMark = Math.floor(@length / 2)
	firstHalf = @slice(0, halfwayMark)

EvanHahn

# Destructive selection sort.
# [1, 12, 8, 5].selectionSort()
Array::selectionSort = ->

	# Look forward from each element.
	for num, i in this

		# Find the smallest element in this partition.
		smallest = null
		smallestIndex

EvanHahn

C++ I/O

• cin.get

• cin.unget

• getline(cin, var)

• cin >> var

• cout is slow because it has to go to the operating system

EvanHahn

// The most readable way (in my opinion)
$(document).ready(function() {
    // your code here
});

// Alternate way that's supposedly faster
$.fn.ready(function() {
    // your code here
});

EvanHahn

# Idiot solution to this dailyprogrammer idea
# <http://redd.it/yln9p>

puts """abandonments
abbreviating
abbreviation
abbreviators
abecedarians
aberrational
abjectnesses

EvanHahn

Let me teach you how programming works through the analogy of slavery.

Imagine that you had a slave. This slave had taken a bunch of your money and you struck a deal with him or her -- do my bidding and I will not throw you in jail.

You quickly learn that this slave isn't like the many other slaves you've had.

For one, this slave has terrible language skills. They only understands about 50 words and doesn't understand anything you say unless you say it very explicitly. If I ordered you, a non-idiot slave, to "bake me a cake", you'd do the same thing as if I said "bake a cake for me." Your slave is not this way: they only respond to "bake new cake for self."

Your slave also doesn't really know how to do anything. "Bake" means nothing to them. When your slave said "I don't understand," you rolled your eyes and said, "okay, start by getting the mix." Your slave said "I don't understand." After about an hour, you realized that your slave doesn't know how to get the mix! You had to instruct your slave to put o

EvanHahn

Cell = require '../conway'

describe 'conway', ->
  alive = Cell.isAlive
  cell = null

  beforeEach ->
    cell = new Cell()

  describe '#die', ->

EvanHahn

// This is an example in a post about private members in CoffeeScript.
// Read more: http://evanhahn.com/?p=1126

var Animal, birch, jambo;

Animal = (function() {
  var firstName;

  firstName = "";