carolinemusyoka

/**
 * Example:
 * var li = ListNode(5)
 * var v = li.`val`
 * Definition for singly-linked list.
 * class ListNode(var `val`: Int) {
 *     var next: ListNode? = null
 * }
 */
class Solution {

carolinemusyoka

//Solves the problem in O(n) time complexity
class Solution {
    fun twoSum(nums: IntArray, target: Int): IntArray {
        //initialize an empty HashMap
        val map = hashMapOf<Int, Int>()
        //and for every element in the array, if it exists in the Map, 
        //check if its complement exists a in the Map or not. If the complement exists then return the indices 
        //of the current element and the complement.
        //Otherwise, put the element in the Map, and move to the next iteration.
        for(i in 0..nums.size - 1){

carolinemusyoka

<style name="checkable_chip" parent="Widget.MaterialComponents.Chip.Choice">
        <item name="android:checkable">true</item>
        <item name="android:textColor">@color/chip_colors_text</item>
        <item name="chipBackgroundColor">@color/chip_colors</item>
        <item name="checkedIcon">@null</item>
        <item name="chipIconVisible">false</item>
        <item name="chipStrokeColor">@color/purple</item>
        <item name="chipStrokeWidth">1dp</item>
        <item name="ensureMinTouchTargetSize">true</item>
        <item name="checkedIconVisible">false</item>

carolinemusyoka

  <com.google.android.material.chip.ChipGroup
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            android:layout_marginBottom="15dp"
            app:singleLine="true"
            android:id="@+id/chip_group"
            app:singleSelection="true">

<!--            app:checkedChip="@id/yes"-->

carolinemusyoka

// Preference DataStore
    implementation "androidx.datastore:datastore-preferences:1.0.0-alpha04"

carolinemusyoka

class ViewModelFactory(private val apiHelper: ApiHelper) : ViewModelProvider.Factory {

    override fun <T : ViewModel?> create(modelClass: Class<T>): T {
        if (modelClass.isAssignableFrom(MainViewModel::class.java)) {
            return MainViewModel(MainRepository(apiHelper)) as T
        }
        throw IllegalArgumentException("Unknown class name")
    }

}

carolinemusyoka

class MainViewModel(private val mainRepository: MainRepository) : ViewModel() {

    fun getSuperHeroes() = liveData(Dispatchers.IO) {
        emit(Resource.loading(data = null))
        try {
            emit(Resource.success(data = mainRepository.getSuperHeroes()))
        } catch (exception: Exception) {
            emit(Resource.error(data = null, message = exception.message ?: "Error Occurred!"))
        }
    }

carolinemusyoka

class MainActivity : AppCompatActivity() {

    private lateinit var viewModel: MainViewModel
    private lateinit var adapter: MainAdapter

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

carolinemusyoka

class MainAdapter(private val result: ArrayList<Hero>,
                  private val clickListener: (Long) -> Unit):
    RecyclerView.Adapter<MainAdapter.DataViewHolder>() {
    class DataViewHolder(itemView: View) : RecyclerView.ViewHolder(itemView) {

        fun bind(hero: Hero, clickListener: (Long) -> Unit ) {
            itemView.apply {
                superheroName.text = hero.name
                Glide.with(superheroImage.context)
                    .load(hero.image.lg)

carolinemusyoka

<?xml version="1.0" encoding="utf-8"?>
<androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:card_view="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content">

    <androidx.cardview.widget.CardView
        android:id="@+id/card_view"