# Shortest String

# I worked on this challenge [by myself, with: ].

# shortest_string is a method that takes an array of strings as its input
# and returns the shortest string
#
# +list_of_words+ is an array of strings
# shortest_string(array) should return the shortest string in the +list_of_words+
#
# If +list_of_words+ is empty the method should return nil

#Your Solution Below
def shortest_string(list_of_words)
  # Your code goes here!
  if list_of_words == []
  	return nil
  elsif list_of_words == ''
  	return ''
  else 
  	list_of_words.sort! {|x,y| x.length <=> y.length}
  	return list_of_words[0]
  end
end