```ruby
# Largest Integer

# I worked on this challenge [by myself].

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

#Your Solution Below
def largest_integer(list_of_nums)
  list_of_nums.sort!
  return list_of_nums[-1]
end


```

Add initial solution back in and use max in refactored solution
user
```ruby
# Largest Integer

# I worked on this challenge [by myself].

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

#Your Solution Below
def largest_integer(list_of_nums)
  max = list_of_nums[0]

  list_of_nums.each do |num|
    if num > max
      max = num
    end
  end

  return max

end


#Refactored
def largest_integer(list_of_nums)
  list_of_nums.max
end


```
assistant