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#announcements
- d
dumptruckman
02/12/2019, 5:33 PMMaybe? I guess I’m unsure of the syntax - k
karelpeeters
02/12/2019, 5:33 PMfun ((String) -> Int).foo() = println(this("hey")) - d
dumptruckman
02/12/2019, 5:33 PMok I’m talking about with an existing function, not a lambda function - k
karelpeeters
02/12/2019, 5:34 PM::myFun.foo() - d
dumptruckman
02/12/2019, 5:34 PMand maybe it’s not really what i’m wanting..simple smile 1 - d
dumptruckman
02/12/2019, 5:34 PM
not workingfun ::populateContext.test() - k
karelpeeters
02/12/2019, 5:35 PMThat's like trying to get
to work.fun 3.foo() - m
marstran
02/12/2019, 5:35 PM
is not a lambda function. It's the type of all functions that take a(String) -> Int
and return anString
. It doesn't matter if it's defined with name or anonymous.Int👍 1 - d
dumptruckman
02/12/2019, 5:36 PMThe idea is to have a helper function available in a class that is only callable within another function in that class and has the parameters of the latter class as variables that are in scope - m
marstran
02/12/2019, 5:37 PMAh, ok. You can define local functions:Copy codefun doSomething(s: String) { fun innerFunction() { println(s) } innerFunction() } - d
dumptruckman
02/12/2019, 5:37 PMso instead ofCopy code
I could just dofun foo(bar: String) { fun help() { println(bar) } help() }Copy codeopen fun foo(bar: String) { help() } - d
dumptruckman
02/12/2019, 5:38 PMbut help() would only be scoped to the function foo - k
karelpeeters
02/12/2019, 5:38 PMWhere does
come from? Shouldn't it just be a parameter?help - d
dumptruckman
02/12/2019, 5:38 PMno - d
dumptruckman
02/12/2019, 5:39 PMi don’t know what the syntax would be in the second case - j
jw
03/05/2019, 3:35 PM - d
Derek Berner
03/05/2019, 6:34 PMNot sure if idiomatic but
is pretty compactlist.groupBy{it.id}.mapValues{it.value.single()}🙏 1 - n
natpryce
03/05/2019, 6:35 PM
is what you’re looking forassociateBy👍 2 - m
Marc Knaup
03/05/2019, 6:45 PMUsing
as an annotation property value gives me the wrapped type in annotation processing instead of the boxed type 😢 Is that intentional? 😮InlineClass::class - u
user
03/06/2019, 1:00 PMhttps://twitter.com/kotlin/status/1103279061340577792 Join @relizarov at @GOTOchgo for Server-Side Kotlin with Coroutines as well as a full day workshop on Async Programming with Kotlin https://t.co/fXO8Sp1Fmc Twitter - a
andries.fc
03/06/2019, 1:27 PMMostly for generics - to capture type info. - s
streetsofboston
03/06/2019, 2:52 PM
from the Arrow libraryEither - u
ursus
03/06/2019, 2:52 PMWhats your experience been? dont you end up with custom enums for errors anyways? like Result<Foo, FooError> - u
ursus
03/06/2019, 2:52 PMversus a custom sealed class for given foo() call - u
ursus
03/06/2019, 2:53 PMwhich however might be class explosion if every such call gets own return sealed class - u
ursus
03/06/2019, 2:55 PMYea but what do you return as error in the either - s
streetsofboston
03/06/2019, 2:55 PMYou’ll define an interface called ‘Error’, then have sub-sets of sealed classes that implement this interface and each have its own set of actual error-values. If need be, you can sub-classes a sealed classe with an other sealed class…🧵 3 - u
ursus
03/06/2019, 2:55 PMI know thanks Im not a beginner - u
ursus
03/06/2019, 2:55 PMwhat im getting at is that - u
ursus
03/06/2019, 2:56 PMyou most likely will have to use some kind of enum for given errors