Artist to Title with "feat."

EXAMPLE:

Before:

Title: Give It To Em
Artist: Akon/Rick Ross

New:

Title: Give It To Em (feat. Rick Ross)
Artist: Akon

Your request looks like the known request ...
"swap the featured artist from the tagfield ARTIST to the tagfield TITLE".
Here in this case the character slash '/' has the same meaning as the word 'featuring'.
Therefore here is offered a method from my library (... it looks somewhat complicated).

Apply action: Guess values

Source format (written as one line):

%TITLE%$regexp($replace(%ARTIST%,'/',' feat. '),'^(.+?)\s+[[({<]?\s*(?:featuring|feat\.?|ft\.?)\s*([^])}>]+)\>\s*[])}>]?(.*)$',' (feat. $2$3)===$1',1)

Guessing pattern:

%TITLE%===%ARTIST%

Result:

TITLE = Give It To Em (feat. Rick Ross)

ARTIST = Akon

DD.20170810.1854.CEST

Thank You :heart::heart::heart:

Here is another method to reach the goal.

Create a helper tag-field ...

FEAT_ARTIST <== $cutLeft(%ARTIST%,$strrchr(%ARTIST%,'/'))

... gives ... FEAT_ARTIST = 'Rick Ross'
... then write ...

TITLE <== %TITLE%' feat. '%FEAT_ARTIST%

... or ...

FEAT_ARTIST <== ' (feat. '$cutLeft(%ARTIST%,$strrchr(%ARTIST%,'/'))')'

... gives ... FEAT_ARTIST = ' (feat. Rick Ross)'
... then write ...

TITLE <== %TITLE%%FEAT_ARTIST%

Remove feat artist from ARTIST ...

ARTIST <== $left(%ARTIST%,$sub($strrchr(%ARTIST%,'/'),1))

DD.20170810.2012.CEST