I have a Regex that works correctly in tests but not when my run my app. No idea what is going on. Here is the regex expression:
Regex.scan(~r/^\[([a-z].*)\].--.(.*).--/msU, text) .
Here is the string I apply it to:
The correct scan result is
# foo, bar
This is what I get using the regex tester at elixre.uk and also when I run tests with
mix test ... However, when I use the above regex expression in my app, the result is an empty list – the regex recognizes nothing. What to do?
Your regular expression fails for me if I put windows line endings in the string (
"\r\n") instead of Linux ones (
"\n"). The option
This is, because
. does match only
\r then, after that the regex demands to get a
- but there is
\n, so it fails.
So you have 3 options:
- Demand the client to deliver only Linux-Endings, but depending on the tech knowledge of the client that may be impossible
- Normalize the input before feeding to the RE-scan, which should be the easiest one
- replace the dots that shall match line endings by
(?:\r|\n|\r\n), but the output needs to be cleaned up as well.
Thank you! I choose your suggested option (2). Simple and works like a charm.