Exercise 19: Finding the longest string in an array

gistfile1.txt

# longest_string is a method that takes an array of strings as its input
# and returns the longest string
#
# +array+ is an array of strings
# longest_string(array) should return the longest string in +array+
#
# If +array+ is empty the method should return nil
def longest_string(array)
  return nil if array.empty?
  
longest_length = 0

  array.each |string|
    longest_length = string.length if string.length > longest_length
  end#each
  
  array.each |string|
    if string.length == longest_length
      longest_string = string
    end#if
  end#each
  
  return longest_string

end#def