MagicalMeghan

<!-- Copyright 2019 Google LLC. 
   SPDX-License-Identifier: Apache-2.0 -->

class Choir {
    private val singers = mutableListOf<Singer>()

    fun addSinger(singer: Singer) {
        singers.add(singer)
    }

MagicalMeghan

<!-- Copyright 2019 Google LLC. 
   SPDX-License-Identifier: Apache-2.0 -->

class Choir {
    private val singers = mutableListOf<Singer>()

    operator fun plusAssign(singer: Singer) {        
        singers.add(singer)
    }
}

MagicalMeghan

<!-- Copyright 2019 Google LLC. 
   SPDX-License-Identifier: Apache-2.0 -->

data class Singer(val name: String) 

fun main() {
    val choir = Choir()
    val singerMeghan = Singer("Meghan")
    
    choir += singerMeghan

MagicalMeghan

<!-- Copyright 2019 Google LLC. 
   SPDX-License-Identifier: Apache-2.0 -->

operator fun contains(s: Singer) : Boolean {
       return singers.contains(s)
}

MagicalMeghan

<!-- Copyright 2019 Google LLC. 
   SPDX-License-Identifier: Apache-2.0 -->
   
data class Singer(val name: String) 
fun main() {
    val choir = Choir()
    val singerMeghan = Singer("Meghan")
    choir += singerMeghan
    if(singerMeghan in choir){
        println("Meghan is a part of the choir!")

MagicalMeghan

<!-- Copyright 2019 Google LLC. 
   SPDX-License-Identifier: Apache-2.0 -->

val choir = Choir()
val singerMeghan = Singer("Meghan")
choir += singerMeghan

MagicalMeghan

<!-- Copyright 2019 Google LLC. 
   SPDX-License-Identifier: Apache-2.0 -->
   
Choir choir = new Choir();
Singer singerMeghan = new Singer("Meghan");
choir.plusAssign(singerMeghan);

MagicalMeghan

<!-- Copyright 2019 Google LLC. 
   SPDX-License-Identifier: Apache-2.0 -->
   
Choir choir = new Choir();
Singer singerMeghan = new Singer("Meghan");
choir.plusAssign(singerMeghan);

MagicalMeghan

<!-- Copyright 2019 Google LLC. 
   SPDX-License-Identifier: Apache-2.0 -->

class Datasource(val context: Context) {
    fun getFlowerList(): Array<String> {
        return context.resources.getStringArray(R.array.flower_array)
    }
}

MagicalMeghan

<!-- Copyright 2019 Google LLC. 
   SPDX-License-Identifier: Apache-2.0 -->

<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
   android:layout_width="match_parent"
   android:layout_height="match_parent"
   xmlns:app="http://schemas.android.com/apk/res-auto">

   <androidx.recyclerview.widget.RecyclerView
       android:id="@+id/recycler_view"