Normalizing line endings in Ruby

Question

I have a string in Ruby, s (say) which might have any of the standard line endings (\n, \r\n, \r). I want to convert all of those to \ns. What's the best way?

This seems like a super-common problem, but there's not much documentation about it. Obviously there are easy crude solutions, but is there anything built in to handle this?

Elegant, idiomatic-Ruby solutions are best.

EDIT: realized that ^M and \r are the same. But there are still three cases. (See wikipedia.)

Answer 1

Try opening them on NetBeans IDE - Its asked me before, on one of the projects I've opened from elsewhere, if I wanted to fix the line endings. I think there might be a menu option to do it too, but that would be the first thing I would try.

Answer 2

I think the cleanest solution would be to use a regular expression:

s.gsub! /\r\n?/, "\n"

Answer 3

Best is just to handle the two cases that you want to change specifically and not try to get too clever:

s.gsub /\r\n?/, "\n"