Snake

• Why Snake?
• It's Snake!
• Easy, but requires:
• Arrays
• Loops
• UI
• Input

Dart

• JavaScript without all the bad stuff
• Compiles to JavaScript
• Write apps in HTML, CSS and Dart
• Very familiar, especially to Java programmers
• Optional type checking
• Type inference
• Programming environment, not just a language

No surprises

void main()
{
    print( "Hello, world!" );
}

No surprises

int twice( int x )
{
    return x * 2;
}

No surprises

class Game
{
    int width;
    int left;
    Game( int w, int l )
    {
        width = w;
        left = l;
    }
}

No surprises

for ( int i = 1; i < snake.length; ++i )
{
  if ( snake[i] == head )
  {
    dead = true;
  }
}

No surprises

switch( e.keyCode )
{
  case KeyCode.UP:
    nextDir = Dir.up;
    break;
  // ...

No surprises

snake = new List<Point>();

Lexical scope

• I.e. sanity prevails

void main()
{
  var x = 3;
  for ( int i = 0; i < 10; ++i )
  {
    var x = 5;
    // ...
  }
  print( x ); // prints 3
}

Construction and properties

class Game
{
    int width;
    int left;
    Game( this.width, this.left ) {}

    get int right =>
        return left + width;

    set right( int val ) =>
        width = val - left;
}

Development environment

• Eclipse-based(!)
• Uses 2GB RAM
• Code completion
• Auto-compile and syntax highlighting
• Deploy with 3 clicks

Deployment

• Just works
• Makes a dir containing images, HTML, CSS, JavaScript
• Copy it somewhere

More info