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    <p>_board is a multidimensional array filled first with Arrays. In the BoardDisplay.mxml</p> <p><strong>(Hello! Flex 4 : Chapter 3. Hello Spark: primitives, comp... > FXG and MXML graphics—building a game.. - Pg. 80)</strong> , </p> <pre><code>&lt;Graphic version="1.0" viewHeight="601" viewWidth="701" xmlns=" library://ns. adobe. com/flex/spark" xmlns:fx=" http://ns. adobe. com/mxml/2009" xmlns:mx=" library://ns. adobe. com/flex/halo" initialize="createBoard()" click=" clickHandler(event)"&gt; </code></pre> <p>initialize calls createBoard().</p> <pre><code>private function createBoard():void { newGame(); _board = new Array(6); for (var row:int = 0; row &lt; 6; row++) { _board[row] = new Array(7); for (var col:int = 0; col &lt; 7; col++) { _board[row][col] = addEllipse(row, col); //Magic Happens! } } } </code></pre> <p>addEllipse returns Ellipse to each entry in _board</p> <pre><code>private function addEllipse(row:int, col:int):Ellipse { var ellipse:Ellipse = new Ellipse(); ellipse.x = 4 + col*100; ellipse.y = 5 + row*100; ellipse.width = 90; ellipse.height = 90; ellipse.fill = getFill(row,col); // Magic Found ! ellipse.stroke = new SolidColorStroke(0x000000, 1, 1.0, false,"normal", null, "miter", 4); boardGroup.addElement(ellipse); return ellipse; } </code></pre> <p>The author casted it as maxmx said but did not really need to as all the entries were of type Ellipse so</p> <pre><code>Ellipse(_board[row][column]).fill = getFill(row, column); </code></pre> <p>can work as</p> <pre><code>_board[row][column].fill = getFill(row, column); </code></pre>
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Guidance
A row detail

Detail views are divided into sections. All the information in the data section comes from columns in the selected row. The other sections display data from other, related rows.

Related data can be related in a to-one or a to-many fashion. Captions of data related in a to-many fashion link to a list view showing a filtered view of the table.

Try moving around until you find a non-empty to-many entry and click on the label to get to one. You can move back to the root by clicking on the database name in the header.

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