Regex matches in MR

[Ulfhednar]

I have a couple of questions about regex use in MultiRename

(?:[0-9a-z]{30})
should match string:-
0ec4dc9a5ea17339b06d1d0f1b2283
but doesn’t find it whether alone or placed in a longer string.

Test page on regex101.com shows it works in both instances eg:

(?:[0-9a-z]{30})  /gm
Non-capturing group (?:[0-9a-z]{30})
Match a single character present in the list below [0-9a-z]
{30} matches the previous token exactly 30 times
0-9 matches a single character in the range between 0 (index 48) and 9 (index 57) (case sensitive)
a-z matches a single character in the range between a (index 97) and z (index 122) (case sensitive)

Multiple search matches when | separated eg:-
(abc|zxy|der)
won’t work, each element needs to be separately entered on an individual line.

Is this expected behaviour?
I checked the regex's work online so I'm wondering what is different.

[Jungle]

For me, both scenarios work.
But be careful with #2. If you enter Find and Replace editor (by pressing [...] button), it will corrupt your "|"-separated group as long as it itself uses "|" as a Find-Replace separator

[Mathias (Author)]

There are variants of RegEx.. I think MC is using ECMAScript standard of regex.

Exactly how it works I don't know. MC is using code that exists in c++ for it.



But it works for me

[Mathias (Author)]

Don't forget to check the "RegEx" checkbox

[Ulfhednar]

Thanks for the replies Mathias & Jungle.
The regex 'flavor' is supposed to be C++ - which is what I set the online test to.
I spend quite a lot of time using regex renames & I do try to ensure the box is ticked, I definitely did on this as I was trying flavor variations for about 15mins when my first checked & rechecked c++ version wouldn't work.
So.
Today #1 works fine    MC has been updated since but still this is a mystery.
Jungle is correct about entering the regex via the ... dialog, as adding it via the entry fields works. That must have been the gotcha on that.

Thanks again!