hackjoy

class ChangeDataTypeForWidgetCount < ActiveRecord::Migration
  def self.up
    change_table :widgets do |t|
      t.change :count, :float
    end
  end

  def self.down
    change_table :widgets do |t|
      t.change :count, :integer

hackjoy

# Transforms ABCDEFGHIJKLMNOPQRSTUVWXY to ABCDE-FGHIJ-KLMNO-PQRS-UVWXY
# @number.change_to_licence

def change_to_licence 
  h = "-"
  string = string.insert(5, h)
  string = string.insert(11, h)
  string = string.insert(17, h)
  string = string.insert(23, h)
  

hackjoy

require 'benchmark'
require 'test/unit'

def count_frequency_of_string_values(key, observation)
    # convert arguments into arrays for comparison
    key_array = key.split(",").map { |s| s.to_i }
    observation_array = observation.split(",").map { |s| s.to_i }
    # for each key - count how many matches within observation and add result to the output  
    output = []
    key_array.each do |k|

hackjoy

def createDoors
    doors = [false, false, false]
    # set one door equal to the car
    doors[rand(3)] = true
    doors
end
 
def openADoorThatHasAGoat(doors, userChoice)
    # return the first false element after removing the users choice and a true value (if present)
    ([0, 1, 2] - [userChoice, doors.index(true)]).first

hackjoy

def product_list(numbers):      
    result = 1
    for number in numbers 
        result = result * number    
    return result    
 

hackjoy

# pull content of a url
def get_page(url):
  try:
    import urllib
    return urllib.urlopen(url).read()
  except:
    return ""

# find the links within a page
def get_next_target(page):

hackjoy

def check_sudoku(grid):
    n = len(grid)
    digit = 1
    while digit <= n:
        i = 0
        while i < n:
            row_count = 0
            column_count = 0
            j = 0
            while j < n:

hackjoy

def split_string(string, split_characters):
    output = []
	atsplit = True
	for char in source:
		if char in splitlist:
			atsplit = True
		else:
			if atsplit:
				output.append(char)
				atsplit = False

hackjoy

import time

def time_execution(code):
    start = time.clock()
    result = eval(code)
    run_time = time.clock() - start
    return result, runtime

hackjoy

def longest_repetition(list):
    best_length = 0
    best_element = None
    current_length = 0
    current_element = None
    for e in list:
        if e != current_element:
            current_element = e
            current_length = 1
        else: