This is Tetris written in Dart.
JavaScript Dart HTML CSS
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tetris-in-javascript
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README

README

tetris-in-dart
==============

This is Tetris written in Dart.

To play it, open src/index.html in a modern web browser.

There's also a JavaScript version in tetris-in-javascript.

Updating
--------

Make sure you get the latest, untested version of Dart Editor and use
Tools >> Generate JavaScript when committing a new version of
Game.dart.js.

Credits
-------

This code was inspired by Alexei Kourbatov (http://www.javascripter.net).

Lessons Learned
---------------

 * Don't try to play with DOM elements before the DOM is loaded.  The easiest
   way to achieve this is to import your Dart-compiled JavaScript at the bottom
   of the page.

 * Dart has generics.  This is a little unfamiliar for a scripting guy like me.

 * I had a hard time finding methods like JavaScript's Math.abs and Math.floor.
   They're now members of num.

 * This is how you add to the DOM:

     HTMLDocument doc = window.document;
     HTMLParagraphElement p = doc.createElement('p');
     p.textContent = message;
     doc.body.appendChild(p);

 * Using innerHTML works too, but I suspect it's frowned upon.

 * DOM manipulation isn't as easy as using innerHTML.  It's not quite as
   horrible as I feared, but it's still a pain in the butt.

 * Sometimes you need to use a temporary variable to help out the type system.
   If you write:

     doc.getElementById("s-" + i + "-" + j).src = 'images/s0.png';

   it'll say "'src' is not a member of Element."  However, you can easily fix
   this by writing:

     HTMLImageElement img = doc.getElementById("s-" + i + "-" + j);
     img.src = 'images/s0.png';

 * Translating from JavaScript to well-typed Dart is a linearly time-consuming,
   but relatively straightforward progress.

 * Intelligent code complete is really helpful when you don't know a language
   or its APIs.  I'm definitely slowed down by not being able to use an
   editor whose keybindings I know (like Vim, etc.), but it's still faster than
   looking up APIs by hand all the time.

 * Trying to figure out the proper way to handle keyboard events in Dart is
   hard because of the DOM.  I'm looking at
   (https://developer.mozilla.org/en/DOM/KeyboardEvent), and it looks like
   there are two ways to do things, the deprecated way, and the way that isn't
   implemented yet.

 * Command-g is the usual Apple key to find the next occurrence of something,
   but it doesn't work in Dart Editor.

 * They're working on a new DOM API
   (http://www.dartlang.org/articles/improving-the-dom/).  I've decided not to
   use it until they say it's stable.

 * The way main() works in the Sunflower Example doesn't match the way main()
   works in sample applications generated by Dart Editor.  I'm not sure why.

 * The latest, untested version of Dart Editor has a feature in the Tools menu
   called "Generate Optimized JavaScript".  This reduced the generated
   JavaScript file from 8.9mb to 186k!