How to remove array elements where element's fields are NULL

arr = [[1555,100],[nil,95],[1774,nil],[1889,255]]

arr.reject { |a,b| (a && b).nil? }
  #=> [[1555, 100], [1889, 255]]

And yet another option:

array.reject { |a| a.any?(&:nil?) }

It is very similar to Cary Swoveland's answer, but will work with arrays of any length and will remove [false, nil] as well.

Use .compact to remove nil elements from array of arrays

array.map(&:compact)

# array = [[1555,100], [95], [1774], [1889, 255]]

Edit

Use .reject! to remove sub arrays containing nil elements.

array.reject! { |e| e.any? nil }

# array = [[1555,100], [1889,255]]