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[Web Dev]: /vagrant/src/nomster $ heroku logs --tail
 ▸    heroku-cli: update available from 6.14.42-3ba878b to 6.15.24-e5de04c
2018-02-11T18:59:22.231712+00:00 app[web.1]: D, [2018-02-11T18:59:22.231639 #4] DEBUG -- : [32c68627-efc0-4131-bd9f-823a8b669ac4]    (0.7ms)  SELECT COUNT(*) FROM "comments" WHERE "comments"."user_id" = $1 AND "comments"."rating" = $2  [["user_id", 1], ["rating", "5_stars"]]
2018-02-11T18:59:22.233247+00:00 app[web.1]: D, [2018-02-11T18:59:22.233170 #4] DEBUG -- : [32c68627-efc0-4131-bd9f-823a8b669ac4]   Comment Load (0.7ms)  SELECT "comments".* FROM "comments" WHERE "comments"."user_id" = $1  [["user_id", 1]]
2018-02-11T18:59:22.234919+00:00 app[web.1]: D, [2018-02-11T18:59:22.234851 #4] DEBUG -- : [32c68627-efc0-4131-bd9f-823a8b669ac4]   Place Load (0.6ms)  SELECT "places".* FROM "places" WHERE "places"."user_id" = $1  [["user_id", 1]]
2018-02-11T18:59:22.237186+00:00 app[web.1]: D, [2018-02-11T18:59:22.237111 #4] DEBUG -- : [32c68627-efc0-4131-bd9f-823a8b669ac4]   Comment Load (0.

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class Bike
	attr_accessor :brand, :color
	
	def initialize(brand, color) 
		@brand = brand
		@color = color
	end

end

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class Bike
	attr_accessor :brand, :color
	
	def initialize(brand, color) 
		@brand = brand
		@color = color
	end

end

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module Luhn
	def self.is_valid?(number)


		# ----------------------------------------------------
		#
		# line 17  - take the number, convert it to a string 
		# and reverse it. '.chars' splits it by digit, then

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# n → n/2 (n is even)
# n → 3n + 1 (n is odd)	
# Write a method to determine a number's collatz sequence.
# Find the number (1 to 1,000,000) with the longest sequence.


# collatz method defined below with (n) as an argument.

def collatz(n)

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"use strict"; 

var _ = {
	join: (array, separator = ",") => {
		var str = "";
		for (var i = 0; i < array.length; i++) {
			str += separator + array[i];
		}
		return str.substring(2);
	}

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// write a function that creates a black and white chess board. 

function mineColor(line, number) {
  if ((line === 'a' || line === 'c' || line === 'e' || line === 'g') && number % 2 == 0) {
    return 'white';
  } else if ((line === 'b' || line === 'd' || line === 'f' || line === 'h') && number % 2 != 0) {
    return 'white';
  } else {
    return 'black';
  }

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// Write a function toWeirdCase (weirdcase in Ruby) that accepts a string, and returns the same string with all even indexed characters in each word upper cased, and all odd indexed characters in each word lower cased. The indexing just explained is zero based, so the zero-ith index is even, therefore that character should be upper cased.

// The passed in string will only consist of alphabetical characters and spaces(' '). Spaces will only be present if there are multiple words. Words will be separated by a single space(' ').

function toWeirdCase(string){
  return string.split(' ').map(function(word){
    return word.split('').map(function(letter, index){
      if (index % 2 === 0) {
        return letter.toUpperCase();
      } else if (index % 2 != 0) {

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// Write a function that takes in a string of one or more words, and returns the same string, but with all five or more letter words reversed (Just like the name of this Kata). Strings passed in will consist of only letters and spaces. Spaces will be included only when more than one word is present.

function spinWords(string){
  return string.split(' ').map(function(word){
      if (word.length >= 5) {
        return word.split('').reverse().join('');
      } else {
        return word;
      }
  }).join(' ');

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class Tree
	attr_accessor :payload, :children

	def initialize(payload, children)
		@payload = payload
		@children = children
	end

	# depth_first returns nil if 11 isn't in the tree
  def search_node(number)