w04d2-solution.rb

# Assessments Solution | Week 4 Day 2

# Question 1
def fizz_buzz_russ (num)
  num.times do |i|
    puts "fizz" if i % 3 == 0
    puts "buzz" if i % 5 == 0
    puts "russ" if i % 7 == 0
  end
end

# Question 2
numbers = "7316717653133062491922511967442657474235534919493496983520312774506326239578318016984801869478851843858615607891129494954595017379583319528532088055111254069874715852386305071569329096329522744304355766896648950445244523161731856403098711121722383113622298934233803081353362766142828064444866452387493035890729629049156044077239071381051585930796086670172427121883998797908792274921901699720888093776657273330010533678812202354218097512545405947522435258490771167055601360483958644670632441572215539753697817977846174064955149290862569321978468622482839722413756570560574902614079729686524145351004748216637048440319989000889524345065854122758866688116427171479924442928230863465674813919123162824586178664583591245665294765456828489128831426076900422421902267105562632111110937054421750694165896040807198403850962455444362981230987879927244284909188845801561660979191338754992005240636899125607176060588611646710940507754100225698315520005593572972571636269561882670428252483600823257530420752963450"

def multiplyDigits (smallNum)
  # multiply the 13 digits
  # smallNum = "8826704282524"
  # split("") = ["8", "8", "2"...]
  return smallNum.split("").inject(1) { |product, n|
    product.to_i * n.to_i
  }
end

def thirteen_adjacentDigits(bigNum)
  maxProduct = 0
  maxSequence = ""
  candidate = ""
  times_to_loop = bigNum.length - 13
  times_to_loop.times do |i|
    candidate = bigNum[i, 13]
    tempTotal = multiplyDigits(candidate)
    if (tempTotal > maxProduct)
      maxProduct = tempTotal
      maxSequence = candidate
    end
  end
  return maxSequence
end

puts thirteen_adjacentDigits(numbers)

# Bonus
@library = []

def create_book(author, title, readingStatus)
  book = {
    author: author,
    title: title,
    readingStatus: readingStatus
  }

  @library.push(book)
end