mplacona

void snowFall(){
  // draw background on canvas
  ctx.fillStyle="#000";
  ctx.fillRect(0,0,W,H);
  
  //drawing intitial snowflakes on canvas
  ctx.fillStyle = "#fff";
  // rain 
  ctx.beginPath();
  

mplacona

void main() {
  var canvas = querySelector('#stage');
  ctx = canvas.getContext('2d');
  
  // resize canvas
  canvas.width = W;
  canvas.height = H;
  
  // create random flakes
  for(int i = 0; i < maxFlakes; i++){

mplacona

import 'dart:io';

final int port = 5000;
final String address = "127.0.0.1";

void main() {
  
}

mplacona

import 'dart:io';

final int port = 5000;
final String address = "127.0.0.1";

void main() {
  HttpServer.bind(address, port)
    .then((HttpServer server){
    
  });

mplacona

import 'dart:io';

final int port = 5000;
final String address = "127.0.0.1";

void main() {
  HttpServer.bind(address, port)
    .then((HttpServer server){
      print('listening for connections on $port');
      server.listen((HttpRequest request) {

mplacona

import 'dart:io';
import 'dart:async';

final int port = 5000;
final String address = "127.0.0.1";

void main() {
  Future<ServerSocket> serverFuture = ServerSocket.bind(address, port);
  serverFuture.then((ServerSocket server) {
    print('listening for connections on ' + server.port.toString());

mplacona

import 'package:unittest/unittest.dart';
import '../bin/factory_pattern.dart';

void main(){
  test("new instance of Shape is created", (){
    var shape = new IShape();
    expect(shape is IShape, isTrue);
  });
  
  test("new instance of Rectangle is created", (){

mplacona

class IShape{
  void draw(){}
}

class Rectangle implements IShape{
  void draw(){
    print("Inside Rectangle::draw() method.");  
  }
}

mplacona

class ShapeFactory{
  IShape getShape(String shapeType){
    // check for nulls being passed
    if(shapeType == null){
      return null;
    }
    
    // check for types
    var type = shapeType.toLowerCase();
    switch(type){

mplacona

void main() {
  var factory = new ShapeFactory();
  var rectangle = factory.getShape('rectangle');
  rectangle.draw();
}