Sorting an array of arrays in Ruby

Question

I have an array of arrays like so:

irb(main):028:0> device_array
=> [[\"name1\", \"type1\", [\"A\", \"N\", \"N\"], [\"Attribute\", \"device_attribute\"], 9         


        

Answer 1

sort_by

Instead of using spaceship operator (<=>) give a try to sort_by

device_array.sort_by { |el| el[4] }

Though if you know that the forth element is the last one, you can use el.last too in the block.

Ruby docs: Enumerable#sort_by