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  • a

    anstaendig

    10/06/2017, 1:08 PM
    That’s why I said read only
  • m

    mmaillot

    10/06/2017, 1:09 PM
    List is immutable, object contained in the list can be mutable or not.
  • a

    anstaendig

    10/06/2017, 1:09 PM
    If I can change an object in a list, the list is not immutable, is it?
  • j

    jstuyts-squins

    10/06/2017, 1:10 PM
    Yes, you are right. 
    List
    means that it is read-only for you, but another object may still mutate the list
  • m

    mmaillot

    10/06/2017, 1:10 PM
    Yes, the list is just a chain which reference objects. This chain is immutable. Object can be mutable but your list never change, only object in the list.
  • j

    jstuyts-squins

    10/06/2017, 1:12 PM
    @mmaillot You are wrong about this. It is read-only, but still mutable:
    Copy code
    val mutableList = mutableListOf("foo", "bar")
val list: List<String> = mutableList
mutableList += "baz"
println(list) // Outputs "foo", "bar" and "baz"
  • m

    mmaillot

    10/06/2017, 1:13 PM
    In this case you cast a mutableList in List. Just change the pointer. But yes, the list change but is not a list, it's a mutable list.
  • m

    menegatti

    10/06/2017, 1:14 PM
    being nitpicky, 
    mutableList += "baz"
    doesn’t work because 
    mutableList
    is a 
    val
  • j

    jw

    01/30/2018, 11:28 PM
    any recommendation you see to use such a prefix for Java or Kotlin is either wrong or not for user code, or both
    ➕ 2
  • p

    Pascal How

    01/30/2018, 11:37 PM
  • u

    user

    01/31/2018, 6:36 AM
    @dawidhyzy commented on @Aditya’s file

    https://kotlinlang.slack.com/files/U90THSTMM/F90KFJKA5/img_20180131_025143.jpg▾

    : do you know that you can do screenshot on Windows?
  • a

    audhil

    01/31/2018, 7:29 AM
    my article got published in Android Weekly and Kotlin Weekly this week. Check it out! ✌️ https://medium.com/audhil/how-to-generate-xml-with-kotlin-extension-functions-and-lambdas-in-android-app-976229f1e4d8
    👏 2
  • s

    sylcn

    01/31/2018, 9:09 AM
    Hi Everyone, I am a bit cofused about getting Typed Array with kotlin. I use ButterKnife at the Java side for the getting Drawable array. But couldn't find equivalent method for kotlin. Here is my drawable array,
    Copy code
    <integer-array name="category_images">
        <item>@drawable/ic_eczane</item>
        <item>@drawable/ic_durak</item>
        <item>@drawable/ic_egitim</item>
        <item>@drawable/ic_ibadet</item>
        <item>@drawable/ic_saglik</item>
        <item>@drawable/ic_tarihi</item>
        <item>@drawable/ic_kamu</item>
        <item>@drawable/ic_banka</item>
        <item>@drawable/ic_otopark</item>
        <item>@drawable/ic_otel</item>
        <item>@drawable/ic_park</item>
        <item>@drawable/ic_alisveris</item>
        <item>@drawable/ic_kulturel</item>
        <item>@drawable/ic_spor</item>
        <item>@drawable/ic_ibb_iletisim</item>
        <item>@drawable/ic_restoran</item>
        <item>@drawable/ic_veteriner</item>
        <item>@drawable/ic_benzin</item>
        <item>@drawable/ic_ibb_wifi</item>
    </integer-array>
    and here is getting this array with ButterKnife
    Copy code
    @BindArray(R.array.category_images)
    TypedArray categoryImages;
    So How can I do same thing at Kotlin ? Thanks for all.
  • g

    gildor

    01/31/2018, 9:10 AM
    TypedArray? Why do you need it here. Probably you want to use 
    IntArray
    instead.     TypedArray is container for styled attributes Oh, I didn’t know ButterKnife actually supports injection of TypedArray @sylcn What is your problem? Kotlin version should look like:
    Copy code
    @BindArray(R.array.category_images)
lateinit var categoryImages: TypedArray
  • s

    sylcn

    01/31/2018, 9:21 AM
    I have to store drawables for populating listview ?
    stackoverflow 3
  • a

    Ayden

    01/31/2018, 9:37 AM
    Hello. Can I do something like this in Kotlin? 
    class MainActivity : AppCompatActivity(), BottomNavigationView.OnNavigationItemSelectedListener
    ?
  • a

    Ayden

    01/31/2018, 9:39 AM
    I receive an error on the 
    class MainActivity
    state that 
    Class 'MainActivity' is not abstract and does not implement abstract member
    .
  • j

    James Coggan

    01/31/2018, 9:40 AM
    Copy code
    interface SomeListener {
    fun onSuccess()
}

class MainActivity : AppCompatActivity(), SomeListener {
    override fun onSuccess() {
        TODO("not implemented") //To change body of created functions use File | Settings | File Templates.
    }

    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        setContentView(R.layout.activity_main)


    }
}
  • j

    James Coggan

    01/31/2018, 9:40 AM
    worked normal for me
  • a

    Ayden

    01/31/2018, 9:43 AM
    I'm not sure if I do it correctly or not.
  • e

    edwardwongtl

    01/31/2018, 9:43 AM
    You're missing the 
    override
    modifier on the 
    onNavigationItemSelected
  • a

    Ayden

    01/31/2018, 9:44 AM
    I'm reading an Java article and I convert it from Java to Kotlin.
  • a

    Ayden

    01/31/2018, 9:44 AM
    I tried to place the 
    override
    there.
  • a

    Ayden

    01/31/2018, 9:44 AM
    It shows error.
  • a

    Ayden

    01/31/2018, 9:44 AM
    Let me try.
  • n

    Nicolas Chaduc

    01/31/2018, 9:44 AM
    try to remove 
    ?
  • a

    Ayden

    01/31/2018, 9:44 AM
    onNavigationItemSelected overrides nothing.
  • a

    Ayden

    01/31/2018, 9:44 AM
    Lol.
  • a

    Ayden

    01/31/2018, 9:45 AM
    Wow.
  • a

    Ayden

    01/31/2018, 9:45 AM
    That fi!
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