Dalmangyi

abstract class Fruit {
    
	factory Fruit(Fruits type){
		switch(type){
			case Fruits.Apple:
				return Apple();
			case Fruits.Banana:
				return Banana();
      default:
         return null;

Dalmangyi

void main() {
  print(ppap());

}

class fruit {
  var pineapple = '1';
}

class tool {

Dalmangyi

class Price {  
  int _coke=550,pepsi=450,cider=400;
  int tax=50;
  
  int get coke => _coke;
  int get cola => (_coke+tax) + (pepsi+tax);
  int get mix => (pepsi+tax) + (cider+tax);
  int get all => (_coke+tax) + (pepsi+tax) + (cider+tax);
  
  set coke(value) => _coke = value;

Dalmangyi

class Car {  
  String name;
  int gold;
  int zeroToHundred;

  Car({this.name, this.gold=124000, this.zeroToHundred});
  Car.sale(String name) : this(name:name, gold:117800, zeroToHundred:20);

  @override
  toString(){

Dalmangyi

void main(){
	print('${sum1(1,2)}');
	print('${sum2(3,4)}');
  
  var list = [0,1,2,3,4].map((n) => n*n);
  print(list);
}

int sum1(a, b){
	return a+b;

Dalmangyi

class Car {  
  int gold;
  int zeroToHundred;
  int color;

  Car({this.gold=124000, this.zeroToHundred, this.color});
  
  @override
  toString(){
    return 'gold:$gold, zth:$zeroToHundred, color:$color';

Dalmangyi

class Car {  
  int gold;
  int zeroToHundred;
  int color;

  Car(this.gold, this.zeroToHundred, this.color);
  
  @override
  toString(){
    return 'gold:$gold, zth:$zeroToHundred, color:$color';

Dalmangyi

void main(){
  func1(100,200);
	func2(v3:'hi');
  func3(123);
  func3(123,456);
}

//optional var
void func1(var v1, v2){
  print('$v1, $v2');

Dalmangyi

void main() {
  var str1 = 'string1';
  var str2 = "string2";
  var str3 = 'str'+'ing3';
  var str4 = '$str1 is good';
  var str5 = '${5+3} is 8';
  var str6 = '${str1=='string1'?str2:str3} ~~';
  
  print('$str1');
  print('$str2');

Dalmangyi

void main() {
  final List<String> languages = [];
  const List<String> companies = [];

  languages.add('dart');
  
  /* 
  // compile error
  companies.add('Github');
  languages = ['c'];