CODEWITHSUNDEEP
regex
m0meni
m0meni

Reputation: 16445

Regex confusing behavior when using \g modifier

I'm fairly experienced in using regex, but I've come across something recently that I can't explain.

I was trying to make a regex that would match the test in both: 2015_test_1_2 and test_1_2. I came up with /(?!\d)([^_]+)/ which worked when I tested each string individually; however, when I tested both at the same time, using the /gm modifier the 2015 from the first test matches if it isn't on the first line.

On the first line:

On the second line:

The example explains it better than I can: https://regex101.com/r/zF0iR5/4

Upvotes: 1

Views: 39

Answers (1)

anubhava
anubhava

Reputation: 785611

It is because [^_] also matches a newline.

Either move last example text to first line or change your regex to:

(?!\d)([^_\n]+)

Or else:

(?![\d\n])([^_]+)

RegEx Demo

Upvotes: 1

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