We should have Object Equality

[JoeyZwicker]

For groupBy, distinct...

[coffeemug]

Not sure if you guys had this discussion already (if so, please disregard this), but object equality isn't enough to implement this. We need to implement a comparison class for json data to make this work. This isn't particularly difficult (we discussed an acceptable comparator definition in one of our working groups), but I thought I'd mention it for posterity.

Also, this will automagically fix #103 when it's done.

[jdoliner]

Well for groupBy and distinct you don't actually need a comparison operator although it will require doing a linear scan rather than a logarithmic one which isn't good. Like you said we have a perfectly reasonable definition for this so we should just add it.

[jdoliner]

Status update:
A proposed solution for this is in code review.