kevbuchanan

#Vim Cheatsheet (with NerdTree)

Navigation

up, down, left, right - k, j, h, l

go to line - : , line number, enter

Files

While in nerdtree

kevbuchanan

def insertion_sort(array)
  0.upto(array.length - 1).each do |index|
    element = array[index]
    position = index
    while element < array[position - 1] && position > 0
      array[position] = array[position - 1]
      array[position - 1] = element
      position -= 1
    end
  end

kevbuchanan

class Chord
  NOTE_POSITIONS = {
                    'C' => 0,
                    'B#' => 0,
                    'Db' => 1,
                    'C#' => 1,
                    'D' => 2,
                    'Eb' => 3,
                    'D#' => 3,
                    'Fb' => 4,

kevbuchanan

RSpec vs Jasmine

A very basic intro to Jasmine tests for those familiar with RSpec

let/before

  let(:post) { Post.new("My Title", "My Content") }

 var post

kevbuchanan

function Frame(rolls) {
  if (rolls[0] == 10) {
    this.rolls = [rolls[0]]
  }
  else {
    this.rolls = rolls
  }
}

Frame.prototype.rollScore = function() {

kevbuchanan

class Frame
  attr_reader :rolls

  def initialize(rolls)
    @rolls = rolls.first == 10 ? [rolls.first] : rolls
  end

  def roll_score
    @rolls.inject(:+)
  end

kevbuchanan

VALUES = { 1000000000000 => 'trillion ', 1000000000 => 'billion ', 1000000 => 'million ', 1000 => 'thousand ', 1 => '' }
TENS = ['', '', 'twenty ', 'thirty ', 'forty ', 'fifty ', 'sixty ', 'seventy ', 'eighty ', 'ninety ']
ONES = ['', 'one ', 'two ', 'three ', 'four ', 'five ', 'six ', 'seven ', 'eight ', 'nine ']
TEENS = ['ten ', 'eleven ', 'twelve ', 'thirteen ', 'fourteen ', 'fifteen ', 'sixteen ', 'seventeen ', 'eighteen ', 'nineteen ']

def to_word(number)
  power = 1000**(Math.log10(number).floor / 3)
  to_write = number / power
  number_as_word = get_hundreds(to_write) + get_tens(to_write) + get_ones(to_write) + VALUES[power]
  number_as_word << to_word(number % power) unless number % power == 0

kevbuchanan

//------------------------------------------------------------------------------------------------------------------
// YOUR CODE: Create your Zoo "object literal" and Animal "constructor" and "prototypes" here.
//------------------------------------------------------------------------------------------------------------------
var Zoo = {
  init : function(animals){
    this.animals = animals
  },
  bipeds : function(){
    return this.animals.filter(function(element){
    return (element.legs == 2);

kevbuchanan

class Node
  attr_accessor :value, :left, :right

  def initialize(value, left = nil, right = nil)
    @value, @left, @right = value, left, right
  end

  def delete(node)
    if @left.value == node.value
      @left = nil

kevbuchanan

class Vehicle
   attr_reader :wheels, :color, :gas_mileage
   attr_accessor :status, :speed
   def initialize(args)
      @wheels = args[:wheels]
      @color = args[:color]
      @status = :stopped
      @speed = 0
      @gas_mileage = [true, false].sample
   end