rohankandwal

# DSA Question Bank

## Arrays, Hashing, Prefix/Suffix

1. Find the second largest element in one pass without extra space.
2. Find the k largest distinct elements without fully sorting the array.
3. Find the two numbers that appear once when every other number appears twice.
4. Find the majority element that appears more than n / 2 times.
5. Find all elements that appear more than n / 3 times.
6. Count inversions in an array.

rohankandwal

/// Read details on https://theprogrammingway.com/flutter-file-upload-using-webview-on-android/
import 'dart:io';

import 'package:file_picker/file_picker.dart';
import 'package:flutter/material.dart';
import 'package:webview_flutter/webview_flutter.dart';
import 'package:webview_flutter_android/webview_flutter_android.dart';

void main() {
  runApp(const MyApp());

rohankandwal

analyzer:
  errors:
    # treat missing required parameters as a warning (not a hint)
    missing_required_param: warning
    # treat missing returns as a warning (not a hint)
    missing_return: warning

linter:
  rules:
    - always_declare_return_types

rohankandwal

final _webViewPlugin = FlutterWebviewPlugin();

@override
  Widget build(BuildContext context) {
    return WillPopScope(
      child: WebviewScaffold(
        url: "https://www.google.com",
        withZoom: false,
        withLocalStorage: true,
        withJavascript: true,

rohankandwal

@override
  Widget build(BuildContext context) {
    return ListView.separated(
        padding: EdgeInsets.only(top: 8),
        separatorBuilder: (context, index) => Icon(Icons.add),
        itemBuilder: (BuildContext context, int index) {
          return ListTile(
              title: Text(list[index].title),
              leading: Image.network(list[index].image_url),
              subtitle: Text(list[index].subtitle),

rohankandwal

@override
  Widget build(BuildContext context) {
    return ListView.separated(
        padding: EdgeInsets.only(top: 8),
        separatorBuilder: (context, index) => Divider(
          height: 2,
          color: Colors.red,
        ),
        itemBuilder: (BuildContext context, int index) {
          return ListTile(

rohankandwal

@override
  Widget build(BuildContext context) {
    return ListView.builder(
      itemBuilder: (context, index) {
        return ListTile(
            title: Text(list[index].title),
            leading: Image.network(list[index].image_url),
            subtitle: Text(list[index].subtitle),
          );
      },

rohankandwal

package com.itcse.beerrecepies;

import org.junit.rules.TestRule;
import org.junit.runner.Description;
import org.junit.runners.model.Statement;

import java.util.concurrent.Callable;

import io.reactivex.Scheduler;
import io.reactivex.android.plugins.RxAndroidPlugins;

rohankandwal

@Module(includes = {
  AndroidInjectionModule.class, RepositoryModule.class,
  MySharedPreferencesModule.class
  ViewModelModule.class, LocalRepositoryModule.class, MQTTModule.class
})
abstract class AppModule {
     /*
   * Singleton annotation isn't necessary since Application instance is unique but is here for
   * convention. In general, providing Activity, Fragment, BroadcastReceiver, etc does not require
   * them to be scoped since they are the components being injected and their instance is unique.

rohankandwal

@Module
public abstract class ViewModelModule {
    @Binds
  @IntoMap
  @ViewModelKey(SplashScreenViewModel.class)
  abstract ViewModel bindSplashScreenViewModel(final SplashScreenViewModel splashScreenViewModel);

  @Binds
  @IntoMap
  @ViewModelKey(LoginActivityViewModel.class)