Question

Tried the following

def pkill(process_name, *host)  
         puts host.nil? # =>  false
         puts host.empty? # =>  true
         puts host # =>  nil
         puts host[0].nil? # => true
    end

Now if I call send("pkill", blah, nil), how/why is host false??

Pretty new to ruby, so keep it smooth 🙂

Answer 1

Because it’s not nil, it’s empty array.

def pkill(process_name, *host)  
  host.nil? # => false
  host # => []
  host.empty? # => true
end

pkill 'blah'