I need help writing this regex. Maybe it's obvious to someone else, but I keep failing one while matching the other or vice versa.

regex-help.md

I need help writing this regex. Maybe it's obvious to someone else, but I keep failing one while matching the other or vice versa.

In Ruby.

Here are the the three test cases that I need to meet.

[[https://example.com/photo.png]]
[[https://example.com/video.mp4 With a text caption that's always separated from the URL by at least one space.]]
[[https://example.com/photo.png]] [[https://example.com/photo.png]]

1. Should match the URL.
2. Should match the URL and caption.
3. Should match the URL two separate times.

If you come up with something, send it my way. Thanks! Sb

Not pretty, but this works:

s1 = "[[https://example.com/photo.png]]"
s2 = "[[https://example.com/video.mp4 With a text caption that's always separated from the URL by at least one space.]]"
s3 = "[[https://example.com/photo2.png]] [[https://example.com/photo3.png]]"

def match(s)
  s.scan(/\[\[(http[^\]\s]+(?:\s.+)?)\]\]/).flatten
  # if you only want to capture the url:
  # s.scan(/\[\[([^\]\s]+)(?:\s.+)?\]\]/).flatten
end

p match(s1)
p match(s2)
p match(s3)