Hi <@U3DE1TXKP> here is how I would do it.
# announcementsa
andries.fc
10/10/2018, 1:48 PMHi @robstoll here is how I would do it.
r
robstoll
10/10/2018, 1:49 PMI don't want a map function but a filter function (but otherwise I would do the same). I have a solution which uses an unchecked cast btw.
m
marstran
10/10/2018, 1:50 PMWhat do you want it to return if
Rr
robstoll
10/10/2018, 1:50 PMI want filter those
robstoll
10/10/2018, 1:51 PMlistOf(1 to null, 1 to "").filter...list(1 to "")Pair<Int, String>a
andries.fc
10/10/2018, 1:52 PM Copy code
kotlin
val x = p.safer()
if (x != null) // right side is not nullm
marstran
10/10/2018, 1:52 PMOh, so you have a list of them.
r
robstoll
10/10/2018, 1:52 PMyes or a sequence
robstoll
10/10/2018, 1:52 PMor something like that
m
marstran
10/10/2018, 1:53 PMYou could use that function to filter with.
list.filterNotNull { it.safer() }a
andries.fc
10/10/2018, 1:53 PMyes.. so you use the function to filter out not null.
andries.fc
10/10/2018, 1:53 PMyes!
r
robstoll
10/10/2018, 1:53 PMfilterNotNullrobstoll
10/10/2018, 1:53 PMdoes it exist in 1.3?
robstoll
10/10/2018, 1:54 PMthe pairs as such are not null
d
Dico
10/10/2018, 1:54 PMConsider having
<L: Any, R: Any>a
andries.fc
10/10/2018, 1:54 PMhaven check out 1.3 yet. let me check on my side.
m
marstran
10/10/2018, 1:55 PMOh, sorry. It should be
list.mapNotNull { it.safer() }r
robstoll
10/10/2018, 1:55 PMah nice... was not aware of this one 🙂
a
andries.fc
10/10/2018, 1:55 PMi like Kotlin,… many gems
andries.fc
10/10/2018, 1:57 PM Copy code
val unsafeList = listOf("1" to 1, "yes" to null, "no" to 10)
val safeList = unsafeList.asSequence().mapNotNull { it.safer() }.toList()
println("unsafeList = $unsafeList")
println("safeList = $safeList")