How to write a script that can deal with input in the format of ARGF as well as file in Ruby

Question

Is there a concise way to do it?

case 1

File.open(infile, 'r').readlines.each do |line|
  process
end

case 2

ARGF.readlines.each do |line|
  process
end

Answer 1

Is this what you're looking for?

method = something_to_help_me_decide ? File.open(infile, 'r') : ARGF
method.readlines.each do |line|
  process
end

Not super clear what you're going for here.