Sort Two Names Alphabetically

Is there an easier way to swap a filename such as:

"Justin Bieber & Ariana Grande"
"Madonna & Britney Spears"

to

"Ariana Grande & Justin Bieber"
"Britney Spears & Madonna"

where it's sorted by each artist's name alphabetically.

I use swap, but then have to manually look at each filename to make sure it's sorted alphabetically by name 1 and name 2. Otherwise, it will swap filenames that are sorted correctly.

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Use a Script method with the following code:

names = item.name.match(/([^&]*?) *& *(.*)/);
if (names) {
names = names.slice(1,3).sort();
return names[0] + ' & ' + names[1];
}

Spaces before and after "&" are optional.

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Reply to #2:
Wow ... that was quick. Thank you so much!
I don't know how to write scripts, but it works perfectly!...

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Reply to #2:
BTW...Long shot here... but is there a script that can sort multiple names (more than two names) in a title in alphabetical order?

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Reply to #4:
If all your names are separated by "&" (eg "Ariana Grande & Justin Bieber & Britney Spears & Madonna"):

names = item.name.split(/ *& */).sort();
newName = names[0];
for (j=1; j<names.length; j++) newName += ' & ' + names[j];
return newName;

However if your list is in themore conventional form "Ariana Grande, Justin Bieber, Britney Spears & Madonna" use the following code:

names = item.name.split(/ *[,&] */).sort();
newName = names[0];
for (j=1; j<names.length-1; j++) newName += ', ' + names[j];
if (names.length>1) newName += ' & ' + names[j];
return newName;

In each case spaces before and after the separators are optional and filenames with only a single name will not be changed.

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Reply to #4:
If all your names are separated by "&" (eg "Ariana Grande & Justin Bieber & Britney Spears & Madonna"):

names = item.name.split(/ *& */).sort();
newName = names[0];
for (j=1; j<names.length; j++) newName += ' & ' + names[j];
return newName;

However if your list is in themore conventional form "Ariana Grande, Justin Bieber, Britney Spears & Madonna" use the following code:

names = item.name.split(/ *[,&] */).sort();
newName = names[0];
for (j=1; j<names.length-1; j++) newName += ', ' + names[j];
if (names.length>1) newName += ' & ' + names[j];
return newName;

In each case spaces before and after the separators are optional and filenames with only a single name will not be changed.

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Reply to #5:
Wow... Thanks David!

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