How do I remove blank elements from an array?

Question

I have the following array

cities = [\"Kathmandu\", \"Pokhara\", \"\", \"Dharan\", \"Butwal\"]

I want to remove blank elements from the ar

Answer 1

cities.reject! { |c| c.blank? }

The reason you want to use blank? over empty? is that blank recognizes nil, empty strings, and white space. For example:

cities = ["Kathmandu", "Pokhara", " ", nil, "", "Dharan", "Butwal"].reject { |c| c.blank? }

would still return:

["Kathmandu", "Pokhara", "Dharan", "Butwal"]

And calling empty? on " " will return false, which you probably want to be true.

Note: blank? is only accessible through Rails, Ruby only supports empty?.