``` list.map { arrayOf(it.rfid.rfid, it.pr...

# announcements

[xenoterracide]

list.map { arrayOf(it.rfid.rfid, it.pressureSignal, it.uoPressure, it.chamberPressure, it.ultrasonicSignal, it.rfid.timestamp) }

given this map, I want to flatten the whole list into one big array (no nested arrays), but I’m not sure how to take each element of this array and map it to just an element

[diesieben07]

flatMap?

[xenoterracide]

but flatmap what?

[diesieben07]

Same as in Java? 😄

[diesieben07]

Or really you can just use flatMap in place of map in this case

[xenoterracide]

I don’t have a stream here though?

[diesieben07]

Kotlin's List already has flatMap

[diesieben07]

No need for a stream.

[Shawn]

right, you don’t need an intermediate stream

[Shawn]

I feel like there’s something about the shape of your list I don’t understand, given your question

[xenoterracide]

it’s just a list of objects, and I want to take the properties and map it into one big list

[diesieben07]

Yeah. That's what flatMap does.

[xenoterracide]

I feel like I’m missing some obvious to not me syntax with flatmap

[xenoterracide]

list.flatMap {
            it.rfid.rfid,
            it.pressureSignal,
            it.uoPressure,
            it.chamberPressure,
            it.ultrasonicSignal,
            it.rfid.timestamp
         }

[xenoterracide]

that obviously won’t work

[diesieben07]

You have to return a list.

[xenoterracide]

ah

[xenoterracide]

so return listOf instead of arrayOf?

[Shawn]

yep

[xenoterracide]

ok, that’s what I was missing, I knew it was something dumb…