Write a method largest_integer which takes as its input an Array of integers and returns the largest integer in the Array. For example: largest_integer([-10, 0, 10]) # => 10 largest_integer([-10, -20, -30]) # => -10

Find the largest integer in an array

# largest_integer is a method that takes an array of integers as its input
# and returns the largest integer in the array
#
# +array+ is an array of integers
# largest_integer(array) should return the largest integer in +array+
#
# If +array+ is empty the method should return nil

#using sort will go through the array a bunch of times, which is less efficient
def largest_integer(array)
  array.sort.last
end

#OR...I can use the each method and it will go through the array once.  Below is a better way to do it.

def largest_integer(array)
  max = nil
  array.each do |x|
    if max.nil? || max < x 
      max = x
    end
  end
  
  max
end