is there an idiomatic way to get multiple mins if ...

# announcements

[Andrew Gazelka]

is there an idiomatic way to get multiple mins if they are ==?

[Ruckus]

If they are equal, why would you need multiple?

[Andrew Gazelka]

@Ruckus if I am using minBy{...} it might be nice since the contents of the actual object might be different

[Ruckus]

I can't think of a way to do that logically in one step. You'd need to do something like:

val thing = things.minBy { it.value}
val found = things.filter { it.value = thing.value }

[Andrew Gazelka]

yeah... inefficient but clean

[Andrew Gazelka]

I mean 2x slower than most performant way

[Andrew Gazelka]

but probably not bad

[Andrew Gazelka]

kinda a micro-optimization to make a whole other func imo

[Ruckus]

Maybe, but I can't think of a more performant way to do it in one pass. You'd have to maintain a list of all matching found records as you go, throwing the list out every time a smaller value is found. You'd have to benchmark it, but I could see that kind of overhead being comparable to two iterations.

[Andrew Gazelka]

perhaps you're right

[Ruckus]

Ignoring performance, it could be useful if the thing you're iterating over doesn't handle multiple iterations.

[Ruckus]

I guess if you needed to, you could group by the property, get the min key, and get the values for that key. Don't know how heavy that is from a performance perspective though.