Cotel

import android.view.LayoutInflater
import android.view.View
import android.view.ViewGroup
import androidx.annotation.LayoutRes
import androidx.recyclerview.widget.DiffUtil
import androidx.recyclerview.widget.ListAdapter
import androidx.recyclerview.widget.RecyclerView

fun <T, VH : ListAdapterBuilder.ViewHolder<T>> createListAdapter(
    init: ListAdapterBuilder<T, VH>.() -> Unit

Cotel

import arrow.core.Either
import arrow.core.left
import arrow.core.right

class JsonUser
class User

fun JsonUser.toUser(): User = throw RuntimeException()

sealed class UserQueryErrors {

Cotel

import arrow.core.Option

class NonZeroInt private constructor(val value: Int) {
  companion object {
    operator fun invoke(x: Int): Option<NonZeroInt> =
      if (x == 0) Option.empty() else Option.just(NonZeroInt(x))

    fun get(x: NonZeroInt): Int = x.value
  }
}

Cotel

import {combineReducers} from 'redux'

const todos = (state = [], {type, payload}) => {
  switch(type) {
    case LIST_TODOS:
      return payload
    case ADD_TODO:
      return {...state, payload}
    case TOGGLE_TODO:
      return state.map(todo => todo.id === payload ? {...todo, completed: !todo.completed} : todo)

Cotel

const initialState = {
  todos: [],
  filter: 'all',
  isLoading: false
}

export default function(state = initialState, action) {
  switch (action.type) {
    case FETCH_TODOS:
      return {...state, isLoading: true}

Cotel

const restaurant = {
  clientRequests: {
    "1": {
      "drinks": [
        {id: 3, name: "Beer", quantity: 4} 
      ]
    },
    "2": {
      "appetizers": [
        {id: 1, name: "Onion rings", quantity: 2},

Cotel

const store = {
  partyMembers: []
}

const addPersonToParty = (person) => ({type: "ADD_PERSON_TO_PARTY", payload: person})
const removePersonFromParty = (person) => ({type: "REMOVE_PERSON_FROM_PARTY", payload: person})

const reducer = (state = store, action) => {
  switch (action.type) {
    case "ADD_PERSON_TO_PARTY":