Ruby Regexp Match String Exactly

Question

I've a Ruby regexp question.

if string == /(^\d{1,3})/ # this matches both "24" and "24 gravida ut aliquam"
  # code...
end

I want the regexp to match only "24".
How should I do to only allow digits?

Dominic Rodger · Accepted Answer · 2010-08-11 09:10:31Z

10

if string =~ /(^\d{1,3}$)/
  # code...
end

Incidentally, if you only want to match "24" (not "39" or "42") you don't want a regex, you want to do a direct comparison:

if string == "24"
  # code...
end

answered Aug 11, 2010 at 8:56

Dominic Rodger

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2 Comments

Thanks a lot, very fast reply! =)

I want to match all digits up to 999. /(^\d{1,3}$)/ works great, thanks.