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#announcements
- a
agomez
07/28/2017, 5:50 PMyou are extending the class inside that context - d
dumptruckman
07/28/2017, 5:50 PMah - d
diesieben07
07/28/2017, 5:50 PMYou can use it outside of
, too, usingMyClasswith (objectOfMyClass) { /* call extension function */ } - d
dumptruckman
07/28/2017, 5:51 PMhuh - o
ossama
07/28/2017, 6:33 PMHello Kotlin community, I am using a MutableList<String> and each time I want to add an item to the beginning of the list and shift the existing items to the right. Is there an existing function in Kotin which can do that (The equivalent of void add(int index, E element) in JAVA) ? - a
agomez
07/28/2017, 6:39 PMdefault MutableList is ArrayList, you should considere using LinkedList instead if you'll be inserting elements not at the end👆🏽 2 - d
dumptruckman
07/28/2017, 7:20 PMAny idea how to change this around (the generics perhaps) to make it so I can only set the value with an int? - d
dumptruckman
07/28/2017, 7:25 PMWhy isn't it enforcing the type for the set function? - k
karelpeeters
07/28/2017, 7:26 PMBecause it can just pick
as the type forAny
.V - d
dumptruckman
07/28/2017, 7:27 PMI can't figure out how to set up the generics without it extending Any - k
karelpeeters
07/28/2017, 7:28 PMWait did you figure it out or do you want to figure it out? - d
dumptruckman
07/28/2017, 7:29 PMsorry, lost a word there - d
dumptruckman
07/28/2017, 7:30 PMi want to figure it out - d
dumptruckman
07/28/2017, 7:32 PMKotlin generics confuse the heck out of me - d
dumptruckman
07/28/2017, 7:32 PM😞 - d
dumptruckman
07/28/2017, 7:32 PMI've already discovered something Java generics can do that Kotlin cannot - a
agomez
07/28/2017, 7:33 PMwhat? - k
karelpeeters
07/28/2017, 7:34 PMMy first though is that there's no way to do what you want, because when you pass something to a method the generic bound of that parameter can always just grow up to
to match it.Any - k
karelpeeters
07/28/2017, 7:34 PMI'll poke around a bit more though. - d
dumptruckman
07/28/2017, 7:34 PMThanks @karelpeeters - d
dumptruckman
07/28/2017, 7:35 PM - d
dumptruckman
07/28/2017, 7:35 PM-.java - d
dumptruckman
07/28/2017, 7:35 PMThe generic type G cannot be converted to Kotlin - d
dumptruckman
07/28/2017, 7:35 PMas far as I can tell, anyway - d
dumptruckman
07/28/2017, 7:36 PMIt's not really a problem any more, i just adjusted how I was doing other things to get around the need for it - d
dumptruckman
07/28/2017, 7:45 PM@karelpeeters here's the Java version of what I'm trying to do, which works as I would hope... However, converting it to Kotlin makes the second set valid. - k
karelpeeters
07/28/2017, 7:46 PMI think I managed to do your first one in Kotlin: - k
karelpeeters
07/28/2017, 7:46 PMConstructors can't have extra generic parameters though, so I had to do it in a separate factory method. - k
karelpeeters
07/28/2017, 7:47 PMI also have not idea what I just wrote 😄