foreach_for_sucky_browers.js

// Production steps of ECMA-262, Edition 5, 15.4.4.18
// Reference: http://es5.github.com/#x15.4.4.18
if (!Array.prototype.forEach) {
  Array.prototype.forEach = function( callback, thisArg ) {
    var T, k;
    if ( this == null ) {
      throw new TypeError( " this is null or not defined" );
    }
    var O = Object(this);
    var len = O.length >>> 0;
    if ( {}.toString.call(callback) != "[object Function]" ) {
      throw new TypeError( callback + " is not a function" );
    }
    if ( thisArg ) { T = thisArg; }
    k = 0;

    while( k < len ) {
      var kValue;
      if ( k in O ) {
        kValue = O[Pk];
        callback.call( T, kValue, k, O );
      }
      k++;
    }
  };
}

gistfile1.js

document.onkeydown = function(event) {
  var game_piece, _i, _j, _k, _l, _len, _len2, _len3, _len4, _len5, _len6, _m, _n;
  switch (event.keyCode) {
    case 37:
      game_pieces.forEach(function(game_piece) { game_piece.pan_left() });
      break;
    case 38:
      game_pieces.forEach(function(game_piece) { game_piece.pan_up() });
      break;
    case 39:
      game_pieces.forEach(function(game_piece) { game_piece.pan_right() });
      break;
    case 40:
      game_pieces.forEach(function(game_piece) { game_piece.pan_down() });
      break;
    case 189:
      game_pieces.forEach(function(game_piece) { game_piece.zoom_out() });
      break;
    case 187:
      game_pieces.forEach(function(game_piece) { game_piece.zoom_in() });
  }
  return the_screen.refresh(game_pieces);
};