Question

I’m trying to understand why the following returns false: (** I should have put “outputs 0” **)

puts "a\nb" =~ Regexp.new(Regexp.escape("a\nb"), Regexp::MULTILINE | Regexp::EXTENDED)

Perhaps someone could explain.

I am trying to generate a Regexp from a multi-line String that will match the String.

Thanks in advance

Answer 1

puts will always return nil.

Your code should work fine, albeit lengthy. =~ returns the position of the match which is 0.

You could also use:

"a\nb" =~ /a\sb/m

or

"a\nb" =~ /a\nb/m

Note: The m option isn’t necessary in this example but demonstrates how it would be used without Regexp.new.