ruby - How do I strip off nil elements from the end of an array if all my elements are nil?

I'm using Ruby 2.4. I want to strip off nil elements from the end of an array, so I'm using

row_data.pop until row_data.last

but if the array only contains nil elements, this seems to cause some kind of infinite loop because the call never returns. How do I account for the fact that the array might contain all nil elements?

Answer

Just add an extra check to see if the array is empty.

row_data.pop until row_data.last || row_data.empty?