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#announcements
- g
gabrielfv
09/18/2018, 3:12 PMI believe that, in this case, It all depends on how you choose to treat nullable types. Both are ok imo if they're not mixed together👆 1 - g
gabrielfv
09/18/2018, 3:14 PMI myself prefer not to use
as I feel it was made to deal with null-safety, which is something Kotlin has it's own way to deal with.Option➕ 1 - s
Shawn
09/18/2018, 3:15 PMI don’t really think you’re supposed to use java Optional in Kotlin, no - s
Shawn
09/18/2018, 3:15 PMmaybe accept it if you need to, but past that - p
pablisco
09/18/2018, 3:15 PMInteresting how we are used to these operators, but if Kotlin introduced a shorthand for
in the form of.let
there would controversy 🤔 The power of familiarity heheproperty => it.sub - s
Shawn
09/18/2018, 3:16 PMI mean, we already have
, there’s not much we can do about that even if we disliked it?: - s
Shawn
09/18/2018, 3:16 PMI don’t necessarily disagree with the notion for a shorthand for let myself, but it feels a bit disingenuous to say that the community would dislike it purely because they wouldn’t be familiar with it - p
pablisco
09/18/2018, 3:16 PMThe main appeal from using a form of
is that it encourages to handle the negative case (I think)Option - a
Alowaniak
09/18/2018, 3:16 PMwel @pablisco I think the controversy would come out of language syntax change for a lib thing - s
Shawn
09/18/2018, 3:17 PMkeeping signal to noise ratio high is a respectable goal imho - n
Nikky
09/18/2018, 3:19 PMif not that would be a oneliner i guess - p
Paul Woitaschek
09/18/2018, 3:24 PMFor RxJava I often need an
/OptionalOption - j
Jeremy Rempel
09/18/2018, 4:06 PMCouldn't you do sealed class Either with None or T ? - j
Jeremy Rempel
09/18/2018, 4:09 PMrxjava you can use Maybe if expecting a single or none, but when working w/ streams I've used Either - f
fabricio
09/18/2018, 4:12 PMCopy code
ifreturn response.events?.flatMap { evt -> evt.questions?.map { it.correct }!!.toList() }
is null it will return null in the flatMap or it will throw theevt.questions
before!!
?.toList() - j
jw
09/18/2018, 4:12 PMthrow - f
fabricio
09/18/2018, 4:13 PMi need it to return null - j
jw
09/18/2018, 4:13 PMuse
then?. - f
fabricio
09/18/2018, 4:14 PMit doesnt work, it says : - o
orangy
09/18/2018, 4:15 PMYou don’t need
there, and for flatMap to ignore one that returned null usetoList?: emptyList() - o
orangy
09/18/2018, 4:16 PMCopy codereturn response.events?.flatMap { evt -> evt.questions?.map { it.correct } ?: emptyList() }🎉 3 - f
fabricio
09/18/2018, 4:16 PMworked, thanks! - l
lex
09/19/2018, 5:08 AMdoes kotlin have any proxy object engine? or it just platform based feature? top google answers does not give me anything else - j
jacob
09/19/2018, 5:09 AMwhat do you mean by a proxy object engine? - l
lex
09/19/2018, 5:12 AMlike a java dynamic proxy (java.lang.reflect.Proxy, cglib, javasist) - i
ianbrandt
09/19/2018, 3:32 PMRegarding the change for function types with big arity coming in 1.3, just curious, what's a use case for a function with 23+ parameters? https://github.com/JetBrains/kotlin/blob/master/spec-docs/function-types.md➕ 1 - p
pavel
09/19/2018, 5:31 PMAre you sure that the bytearray is in the Charset you expect? - p
pavel
09/19/2018, 5:34 PMyou could try converting it into a couple of popular Charset to see if any of them match - p
pavel
09/19/2018, 5:35 PM
andUS-ASCII
are obvious alternativesUTF-8