yusuf-raza

//List to implement stack behavior (LIFO)

class Queue<T> {
  final List<T> _items = [];

  /// Adds an item to the back of the queue.
  void enqueue(T item) => _items.add(item);

  /// Removes and returns the item from the front of the queue.
  /// Returns `null` if the queue is empty.

yusuf-raza

//dart does not have bult in stack data type, so we will implement it with List

class Stack<T> {
  final List<T> _items = [];

  /// Pushes an item onto the top of the stack.
  void push(T item) => _items.add(item);

  /// Removes and returns the item at the top of the stack.
  /// Returns `null` if the stack is empty.

yusuf-raza

//declare AppLifeCyleListener
late final AppLifecycleListener _lifecycleListener;


//initialize AppLifeCycleListener
 @override
  void onInit() {
    super.onInit();
    _lifecycleListener = AppLifecycleListener(
      onResume: () => debugPrint('app resumed'),

yusuf-raza

# Specify analysis options.
#
# For a list of lints, see: https://dart.dev/tools/linter-rules
# For guidelines on configuring static analysis, see:
# https://dart.dev/tools/analysis
#
# There are other similar analysis options files in the flutter repos,
# which should be kept in sync with this file:
#
#   - analysis_options.yaml (this file)

yusuf-raza

import 'dart:math';

class ArmstrongNumbers {
  bool isArmstrongNumber(int number) {
    int userGivenNumber = number;
    int temp = 0;
    int totalDigits = 0;
    int individualDigit = 0;
    int sum = 0;

yusuf-raza

String reverse(String inputString) {
  String reversedString;
  //using split() method to splt the string into characters
  List<String> chars = inputString.split("");
  //using .reversed.join() to joing the charaters to form a reversed string
  reversedString = chars.reversed.join();
  return reversedString;
}

yusuf-raza

class PrimeFactors {
  List<int> result = [];
  List<int> factors(int num) {
    for (var i = 2; i < num; i++) {
      if (num % i == 0) {
        break;
      } else {
        result.add(i);
      }
    }

yusuf-raza

class Leap {
  bool leapYear(int year) {
    if (year % 4 == 0 && year % 400 == 0) {
      return true;
    } else {
      return false;
    }
  }
}

yusuf-raza

String helloWorld() {
  return "Hello, World!";
}

yusuf-raza

String twoFer([String? name = null]) {
  if (name == null) {
    return 'One for you, one for me.';
  } else {
    return 'One for ' + name + ', one for me.';
  }
}