ruby on rails collapse array

To collapse an array in Ruby on Rails, you can use the flatten method. Here's a step-by-step explanation:

1. Use the flatten method on the array you want to collapse.
2. The flatten method returns a new array that is a one-dimensional flattening of the original array. All elements that are arrays are recursively included.
3. If you want to collapse only one level of the array, you can use the flatten(1) method.

That's it! This process will collapse the array in Ruby on Rails.