kirkdrichardson

// Static methods and variables in Dart (as of v2.5)

// See live at https://dartpad.dartlang.org/300a5a59fc1209aaa6bbbc1f1427bc4a

void main() {

  print('Moon mass: ${Moon.mass}');
  print('Moon mass scaled down by 10 is ${Moon.getScaledMass(10)}');
  print('Moon mass scaled up by 10 is ${Moon.getScaledMass(10, false)}');

kirkdrichardson

// Interfaces in Dart (as of v2.5)

// See live at https://dartpad.dartlang.org/19a8c3c203f27fd1820c004582480ff5

/*
 * TLDR;
 * There is no interface keyword in Dart. Instead we use a regular class with either the extends or
 * implements keyword. If a subclass uses the extends keyword, the child class inherits from the 
 * parent class normally. Else, if the subclass uses the implements keyword, the parent class is
 * treated as an interface: all inherited members must be overriden.

kirkdrichardson

// Abstract classes and methods in Dart (as of v2.5)

// See live at https://dartpad.dartlang.org/847473dc3db9ba5ad9848ecf7b00ba7e

void main() {
  
//   Expect Error! - Can't instantiate abstract classes
//   final Person p = Person();
  
  final Person sartre = Philosopher();

kirkdrichardson

// Inheriting from default and named constructors in Dart (as of v2.5)

// See live at https://dartpad.dartlang.org/4882c662c9cb6bb13ce358b5cffe0968

void main() {
  final Van myVan = Van("Toyota", "Odyssey");
  
  print('Color: ${myVan.color}');
  print('Make: ${myVan.make}');
  print('Model: ${myVan.model}');

kirkdrichardson

// Basic inheritance and polymorphism in Dart (as of v2.5)

// see https://dartpad.dartlang.org/030764a47bc7599b0e1853bda75c7639

void main() {
  
  print('');
  print('------------------ Tree object, Tree Reference ----------------------');
  print('');
  

kirkdrichardson

import 'dart:math';

// Object Oriented Programming Concepts in Dart ( as ov v2.5)
    // Private Variables and Getters/Setters in Dart

// see https://dartpad.dartlang.org/4624e4394c7b09ae5430764abe71d8f3
    
void main() {
  
  // Default getters/setters. Though it looks like we are directly manipulating the instance variable,

kirkdrichardson

// https://dartpad.dartlang.org/6f21c9137b5b14a86025aa5d7dcb7d75

// Frequency Counter pattern in Dart

void main() {
  
  /**
   * Problem Description:
   * 

kirkdrichardson

// Constructors in Dart (as of v2.5)

// This example can be run at https://dartpad.dartlang.org/fc100517efced76881fd0d8d37f673a8
// For other examples see https://gist.github.com/kirkdrichardson

void main() {
  // Use the default constructor
  final Car c = Car();
  print('Car with default constructor id: ${c.id}');
  print('\n\n');

kirkdrichardson

// Exception Handling in Dart (since v2.2)

// This example can be run at https://dartpad.dartlang.org/4d61e7617f5ea82b73223e75242ed368
// For other examples see https://gist.github.com/kirkdrichardson

void main() {
  
//   🚫 Expect Error!
//   int myInt = 40 / 10;
  

kirkdrichardson

// Looping and Iteration in Dart (since v2.2)

// No surprises here.

// This example can be run at https://dartpad.dartlang.org/880e763c99d49f238578de39d5a49bdd
// For other examples see https://gist.github.com/kirkdrichardson

void main() {
  
  // O(n) version of n(n+1)/2 series, i.e. the sum of 1 + 2 + 3 + 4...n