# Need help with regex to swap contents
**URL:** https://community.mp3tag.de/t/need-help-with-regex-to-swap-contents/65611
**Category:** Support
**Created:** [August 15, 2024, 2:49am UTC](https://community.mp3tag.de/t/need-help-with-regex-to-swap-contents/65611 "2024-08-15T02:49:26Z")
**Posts on this page:** 5
**Page:** 1
### Author:  [@AudioBabble](https://community.mp3tag.de/u/AudioBabble)
#### Post date: [August 15, 2024, 2:49am UTC](https://community.mp3tag.de/t/need-help-with-regex-to-swap-contents/65611/1 "2024-08-15T02:49:26Z")
Hi, I'm trying to to convert 'tag to tag'.
In the TITLE field, I have 'Artist - Track'.
I want to have the TITLE field as 'Track {Artist}'.
(I know it's unorthodox, but that's how I want 'Various Artists' compilations named.)
So... %title% {%artist%} is what I want in the format field,
but...
of course that gives me 'Artist - Track {artist}'
I know I can use $regexp(), but what can i put between the brackets so it ignores everything before ' - ', including the ' - '.
As long as I live, I don't think I'll ever get the hang of regex!
Would appreciate any help, thanks 🙂
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### Author:  [@AudioBabble](https://community.mp3tag.de/u/AudioBabble)
#### Post date: [August 15, 2024, 3:01am UTC](https://community.mp3tag.de/t/need-help-with-regex-to-swap-contents/65611/2 "2024-08-15T03:01:09Z")
never mind.... sorted.
I did: filename \> title, filtering out everything except the title.
then: tag to tag \> %title% {%artist%}
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### Author:  [@ohrenkino](https://community.mp3tag.de/u/ohrenkino)
#### Post date: [August 15, 2024, 5:08am UTC](https://community.mp3tag.de/t/need-help-with-regex-to-swap-contents/65611/3 "2024-08-15T05:08:09Z")
> [@AudioBabble](#):
>
> I have 'Artist - Track'.
The regular expression would have been:
`$regexp(%title%,(.*) - (.*),$2 {$1})`
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### Author:  [@AudioBabble](https://community.mp3tag.de/u/AudioBabble)
#### Post date: [August 15, 2024, 1:42pm UTC](https://community.mp3tag.de/t/need-help-with-regex-to-swap-contents/65611/4 "2024-08-15T13:42:34Z")
Thank you -- I'll have to give that a try next time I encounter this situation.
Actually, staring at it a while, the regex makes sense -- maybe there's hope for me yet!
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### Author:  [@system](https://community.mp3tag.de/u/system)
#### Post date: [September 14, 2024, 1:42pm UTC](https://community.mp3tag.de/t/need-help-with-regex-to-swap-contents/65611/5 "2024-09-14T13:42:41Z")
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