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#stdlib
- k
kevinmost
05/05/2016, 11:52 PMYeah, agreed, that could be problematic - e
evanchooly
05/05/2016, 11:52 PMwhoa. varargs have to be last in java. simple smile - e
evanchooly
05/05/2016, 11:52 PMi thought they had to be in kotlin as well... - e
evanchooly
05/05/2016, 11:53 PMbut i guess with named parameters, order is irrelevant mostly. - o
orangy
05/05/2016, 11:54 PMWell, it’s not that easy simple smile - o
orangy
05/05/2016, 11:54 PMCopy codefun x() = itemsMatching(1,2,3) { it > 1 } fun <T> itemsMatching(vararg elements: T, predicate: (T)->Boolean): List<T> { .. } - e
evanchooly
05/05/2016, 11:55 PMtwitches - o
orangy
05/06/2016, 12:06 AMI wonder if anyone knows that “spread operator” works like this:Copy codefun bar() { val ints1 = intArrayOf(1, 2, 3) val ints2 = intArrayOf(5, 6) foo(*ints1, 4, *ints2) } fun foo(vararg elements: Int) { .. }❤️ 2😮 4metal 1👍 5 - e
evanchooly
05/06/2016, 12:34 AMi certainly didn't - j
jw
05/06/2016, 3:09 AMi used that once by accident. super useful when you need to prepend or append a single element - f
fellshard
05/06/2016, 7:49 AMI did a Java -> Kotlin automatic conversion today, and that popped in. It was a happy surprise. simple smile - d
dean
05/06/2016, 11:51 AMI did @orangy! Found out by accident as well :P - d
dean
05/06/2016, 11:53 AMMy favorite application of it isCopy codeval foo = intArrayOf(8, 5, 6) val bar = intArrayOf(5, *foo, 10) - m
marcinmoskala
05/06/2016, 11:55 AMdata person(val name: String, val surname: String) fun f(name: String, surname: String) f(person*) - t
thomasnield
05/09/2016, 2:44 PM@thomasnield has left the channel - k
kirillrakhman
05/09/2016, 3:29 PMI feel like this has been asked before, but what's the best way to merge some items in a list. Currently I have
but this only works if all mergable items are next to each othergroupBy { it.toMergeOn() }.values.map { it.first() } - v
voddan
05/09/2016, 6:28 PM@kirillrakhman:associateBy {it.toMergeOn()}.values - v
voddan
05/09/2016, 6:32 PMQuestion: why there is no
function for lMutableList, same as for Arrays? https://kotlinlang.org/api/latest/jvm/stdlib/kotlin.collections/fill.htmlfill - v
voddan
05/09/2016, 6:33 PMthat would be the best way to create an ArrayList filled with one element:ArrayList<E>(num).fill(item) - v
voddan
05/09/2016, 6:40 PMcan we consider adding
forfill
?MutableCollection - v
vmironov
05/09/2016, 6:41 PMhow is it going to work with sets? - k
kirillrakhman
05/09/2016, 6:43 PM@voddan: Your code wouldn't even work.
is the initial capacity, not the sizenum - v
voddan
05/09/2016, 6:45 PMyou are right with a set it has no sense - v
voddan
05/09/2016, 6:45 PMonly lists then - o
orangy
05/09/2016, 6:56 PMUse
?Collections.fill(list, value) - v
voddan
05/09/2016, 6:57 PM@orangy that would work - v
voddan
05/09/2016, 6:57 PMcan we add the proposed extension for consistency ? - o
orangy
05/09/2016, 6:59 PMI’m not even sure why we have
for arrays.fill - o
orangy
05/09/2016, 6:59 PMBut since we can’t remove it anyway, please file an issue about
forfillMutableList - o
orangy
05/09/2016, 7:00 PMOr may be just vote here: https://youtrack.jetbrains.com/issue/KT-2460