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  • k

    kirillrakhman

    05/19/2017, 9:39 AM
    I heard the "Kotlin in Action" one was pretty dope.
    t
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  • k

    kirillrakhman

    05/19/2017, 9:42 AM
    #random? 😄
    d
    b
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  • m

    madusudanan

    05/19/2017, 10:03 AM
  • m

    madusudanan

    05/19/2017, 10:07 AM
    but whoah...from 1K users to 7.6K
    t
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  • m

    maciekjanusz

    05/19/2017, 10:15 AM
    lateinit var a: String
    makes it possible to have non-nullable type and yet allow for this edge case of it being null until properly assigned value AFTER construction
    l
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  • d

    David W

    05/19/2017, 10:26 AM
    I like 
    apply
    for when you are modifying properties of a class as you initialize it, eg:
    Copy code
    val obj = ObjWithoutConstructor().apply {
    somePropOfObj = "value1"
}
    👍 1
    m
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  • b

    bamdmux

    05/19/2017, 10:38 AM
    And if newcomers need tips, theres the idioms page https://kotlinlang.org/docs/reference/idioms.html
    😮 1
    d
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  • m

    myanmarking

    05/19/2017, 2:36 PM
    does anybody know what time is kotlin presentation today?
    l
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  • o

    omarkj

    05/19/2017, 3:22 PM
    Does Kotlin’s pattern matching use 
    equals
    ? Wondering if it that’s the reason matching on Pair elements isn’t possible.
    k
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  • e

    elizarov

    05/19/2017, 4:21 PM
    @voddan it is in the faq. It will continue to be sponsored by JB.
    v
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    • 1
  • e

    eric239

    05/19/2017, 4:43 PM
    Is there a “kotlin way” to handle delegation to a class (as opposed to an interface). E.g. I have a class 
    Base
    which doesn’t implement anything, and I want to create class 
    Derived
    which extends 
    Base
    and delegates to an instance of 
    Base
    . I know I can use regular java dynamic proxies; wondering if there’s a “kotlin” way.
    d
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  • c

    cedric

    05/19/2017, 4:50 PM
    @elizarov Erlang’s dynamic typing is only one of its many shortcomings. I’ll add strings (disaster), the supervisor model which still requires you to do so much manual hook up (a topic carefully avoided by Erlang advocates), the claim to “let it crash” as if it’s unique to Erlang, the terrible error messages and associated tooling, etc…
    e
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  • v

    vaskir

    05/19/2017, 5:35 PM
    I'm struggling to find real world Kotlin lambdas on github. Any links?
    o
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  • i

    ivykp

    05/19/2017, 9:33 PM
    Hello everybody, i am reading Kotlin in Action, a beautiful book and i have a little question: Currently i am working with Scala and i was wondering if there is something like import java.util.{func1, func2} in Kotlin?
    r
    t
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  • a

    andyg

    05/20/2017, 1:21 AM
    Hi Slackers, lease help... can't figure this one and can't find it via Google. Should be simple... 
    "The %s %s fox jumped over the %s dog".format(<http://Locale.US|Locale.US>, adjectives)
    adjectives
    is a 
    MutableList<String>
    with 3 entries I keep getting 
    MissingFormatArgumentException
    . Have tried casting to 
    TypedArray
    , 
    Array<Any>
    , and more. Thank you!
    g
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  • r

    redrield

    05/20/2017, 1:23 AM
    Can someone point me to where in the documentation <reified T> is described?
    i
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  • p

    pakoito

    05/20/2017, 1:41 AM
    fun <G : Applicative<*>, A, B> traverse(fa: HK<F, A>): (f: (A) -> HK<G, B>) -> HK<G, HK<F, B>>
    is this valid syntax? that f name looks out of place, yet it compiles
    k
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  • d

    Dibya

    05/20/2017, 2:43 AM
    good book /tutorial to learn kotlin??
    i
    u
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  • v

    voddan

    05/20/2017, 7:41 AM
    K I know this is totally pointless, but would you consider adding a ⭐ to the Kotlin repo https://github.com/JetBrains/kotlin ? In a Github programming language rating Kotlin ranks 8th https://github.com/showcases/programming-languages?s=stars All I hope for is overtaking PHP 🐘 (less than 1000 ⭐ away)
    🐘 1
    K 3
    ♦️ 1
    ⭐ 13
    l
    d
    a
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  • r

    ravikumar

    05/20/2017, 11:34 AM
    Copy & pasting a kotlin code in IntelliJ(2017.2EAP) creates a java file instead of kotlin file. Am I missing something or that support is not yet added?
    v
    y
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  • d

    Dalinar

    05/20/2017, 12:32 PM
    what is wrong with this code? why does it return a negative value (if I use a lower number like 
    20
    it seems to work, but a number like 
    100
    will also cause a large negative value ) 
    println(fibonacci(50).last())
    fun fibonacci() = generateSequence(Pair(0, 1), { Pair(it.second, it.first + it.second) }).map { it.first }
    fun fibonacci(n: Int): Sequence<Int> = fibonacci().take(n)
    m
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  • a

    antoin_m

    05/20/2017, 1:05 PM
    Hey guys. Noob here. I was trying to do something with kotlin and spring but when I try to run the code in intellij I get : 
    Error:Kotlin: Unsupported plugin option: org.jetbrains.kotlin.allopen:preset=spring
    Everything is fine when I build to a jar though. Any idea? 😕
    • 1
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  • a

    argoneus

    05/20/2017, 5:12 PM
    I thought lambdas were always inline
    j
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  • v

    vaskir

    05/20/2017, 8:08 PM
  • m

    mg6maciej

    05/21/2017, 9:49 AM
    I'll put that in youtrack then.
    • 1
    • 1
  • a

    argoneus

    05/21/2017, 10:03 AM
    Copy code
    val srl_view = view?.findViewById(R.id.refresh_servers) ?: return
val srl = srl_view as SwipeRefreshLayout
    m
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  • b

    bod

    05/21/2017, 1:37 PM
    So… I’m not sure what the current status is - are we currently supposed to use 
    apply plugin: 'kotlin-kapt'
    or is it an experimental thing? I mean you can use 
    kapt
    dependencies even if you don’t do it, but it works differently it seems - which is a bit confusing. Any clarification on this would be much appreciated 🙂
    i
    l
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  • d

    deviant

    05/21/2017, 2:02 PM
    guys, is there known bug with 
    provideDelegate
    operator? It's just not being called when i'm trying to instantiate delegate via helper function, such
    Copy code
    fun <T> observableField(default: T? = null): ReadWriteProperty<Observable, T?> = ObservableFieldProperty(default)
    the operator works ok though when i instantiate delegated property directly with class constructor
    ❓ 1
    youtrack 1
    i
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  • m

    mipster

    05/21/2017, 4:38 PM
    hey, so i just came here is it ok to ask questions about kotlin code here or should i go to to getting started?
    j
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  • r

    redrield

    05/21/2017, 5:05 PM
    Why is it that recursive calls to get() on a field aren't highlighted by the Kotlin plugin?
    m
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