I put some effort into trying to find a search/replace to do it. Without a high-powered replacement function, I couldn't do it. But I did do this instead.

I put some effort into trying to find a search/replace to do it. Without a high-powered replacement function, I couldn't do it. But I did do this instead. function compress(data){ return data.split`&`.sort().join`&`.replace(/(?<=(\w+)=[^&]*)&\1=/g,','); }