Docs question: how to implement multiple arguments with aggregate function

[nchilla]

Thanks so much for this amazing lib! For .aggregate, the docs mention that:

Just like regular user-defined functions, user-defined aggregates can accept multiple arguments

But it doesn't seem to specify/show an example of how additional arguments can be included. My assumption is that they go after the first two parameters in the step function, e.g.:

db.aggregate('addAllCustom', {
  start: 0,
  step: (total, nextValue, customArgument) => total + nextValue + customArgument,
});

But I'd appreciation confirmation on that (or clarification if I'm confused and it actually works differently)

[JoshuaWise]

Your assumption is correct. The first parameter of step() is always the current aggregate value, and all of the remaining parameters of step() are the arguments passed to your user-defined aggregate function.