Is this the right place to ask for help? I need to loop through an array of objects, and find the matching values.

I'll pay $100.00USD to anyone that can meet me on zoom/discord and help me solve this, it has to be today. I have an array of objects, each object has two properties. I need to compare it against itself and if an object's property A AND property B match another object's property A & B, then I want it to only show one. If there are 5 matches, I only want it to show once. If there are 5 matches, I want that single row to show a number of how many other object match pair. I'm using ReactJs, node, and PostgreSQL. If you're experienced, I guarantee this won't take longer than 20, 30 minutes.