Ruby arrays provide different methods for array sorting.
The first one is Array#sort, that returns a new instance of Array sorted in asceding order.
numbers = [9, 8, 7, 6, 5, 4, 3, 2, 1]
numbers.sort
# => [1, 2, 3, 4, 5, 6, 7, 8, 9]There's also Array#sort!, that modifies the instance instead of returning a new instance of Array, as Array#sort does.
numbers = [9, 8, 7, 6, 5, 4, 3, 2, 1]
numbers.sort!
numbers
# => [1, 2, 3, 4, 5, 6, 7, 8, 9]If you want to make your own sorting rule, you can use Array#sort_by.
array = [1, 'one', 2, 'two', 3, 'three']
array.sort_by { |x, y| x.class.to_s <=> y.class.to_s }
# => [1, 2, 3, "one", "two", "three"]Note that in the previous example I used the <=> operator, that's called the spaceship operator. It's used to define custom sorting rules. Basically instead of returning true or false, this operator can return if one value is greater than, less than or equal to another.
'a' <=> 'a'
# => 0 (equal to)
'a' <=> 'b'
# => -1 (less than)
'b' <=> 'a'
# => 1 (greater than)