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Breadcrumbs go here --> </ul> </div> <div class="toolbuttons toolblock"> <ul> <li id="smallA" class="t_button">A</li> <li id="medA" class="t_button active">A</li> <li id="bigA" class="t_button">A</li> <li id="print" class="t_button"><a href="javascript:this.print();"> <span>Print</span></a></li> </ul> </div> </div> <div class="content mainContent"> <h1 class="title">tic-tac-toe.js Example File</h1> <span class="small-subtitle">declarative/toys/tic-tac-toe/qml/tic-tac-toe/content/tic-tac-toe.js</span> <!-- $$$declarative/toys/tic-tac-toe/qml/tic-tac-toe/content/tic-tac-toe.js-description --> <div class="descr"> <a name="details"></a> <pre class="js"> <span class="keyword">function</span> <span class="name">winner</span>(<span class="name">board</span>) { <span class="keyword">for</span> (<span class="keyword">var</span> <span class="name">i</span>=<span class="number">0</span>; <span class="name">i</span><span class="operator"><</span><span class="number">3</span>; ++<span class="name">i</span>) { <span class="keyword">if</span> (<span class="name">board</span>.<span class="name">children</span>[<span class="name">i</span>].<span class="name">state</span> <span class="operator">!=</span> <span class="string">""</span> <span class="operator">&&</span> <span class="name">board</span>.<span class="name">children</span>[<span class="name">i</span>].<span class="name">state</span> <span class="operator">==</span> <span class="name">board</span>.<span class="name">children</span>[<span class="name">i</span><span class="operator">+</span><span class="number">3</span>].<span class="name">state</span> <span class="operator">&&</span> <span class="name">board</span>.<span class="name">children</span>[<span class="name">i</span>].<span class="name">state</span> <span class="operator">==</span> <span class="name">board</span>.<span class="name">children</span>[<span class="name">i</span><span class="operator">+</span><span class="number">6</span>].<span class="name">state</span>) <span class="keyword">return</span> <span class="number">true</span> <span class="keyword">if</span> (<span class="name">board</span>.<span class="name">children</span>[<span class="name">i</span><span class="operator">*</span><span class="number">3</span>].<span class="name">state</span> <span class="operator">!=</span> <span class="string">""</span> <span class="operator">&&</span> <span class="name">board</span>.<span class="name">children</span>[<span class="name">i</span><span class="operator">*</span><span class="number">3</span>].<span class="name">state</span> <span class="operator">==</span> <span class="name">board</span>.<span class="name">children</span>[<span class="name">i</span><span class="operator">*</span><span class="number">3</span><span class="operator">+</span><span class="number">1</span>].<span class="name">state</span> <span class="operator">&&</span> <span class="name">board</span>.<span class="name">children</span>[<span class="name">i</span><span class="operator">*</span><span class="number">3</span>].<span class="name">state</span> <span class="operator">==</span> <span class="name">board</span>.<span class="name">children</span>[<span class="name">i</span><span class="operator">*</span><span class="number">3</span><span class="operator">+</span><span class="number">2</span>].<span class="name">state</span>) <span class="keyword">return</span> <span class="number">true</span> } <span class="keyword">if</span> (<span class="name">board</span>.<span class="name">children</span>[<span class="number">0</span>].<span class="name">state</span> <span class="operator">!=</span> <span class="string">""</span> <span class="operator">&&</span> <span class="name">board</span>.<span class="name">children</span>[<span class="number">0</span>].<span class="name">state</span> <span class="operator">==</span> <span class="name">board</span>.<span class="name">children</span>[<span class="number">4</span>].<span class="name">state</span> <span class="operator">!=</span> <span class="string">""</span> <span class="operator">&&</span> <span class="name">board</span>.<span class="name">children</span>[<span class="number">0</span>].<span class="name">state</span> <span class="operator">==</span> <span class="name">board</span>.<span class="name">children</span>[<span class="number">8</span>].<span class="name">state</span> <span class="operator">!=</span> <span class="string">""</span>) <span class="keyword">return</span> <span class="number">true</span> <span class="keyword">if</span> (<span class="name">board</span>.<span class="name">children</span>[<span class="number">2</span>].<span class="name">state</span> <span class="operator">!=</span> <span class="string">""</span> <span class="operator">&&</span> <span class="name">board</span>.<span class="name">children</span>[<span class="number">2</span>].<span class="name">state</span> <span class="operator">==</span> <span class="name">board</span>.<span class="name">children</span>[<span class="number">4</span>].<span class="name">state</span> <span class="operator">!=</span> <span class="string">""</span> <span class="operator">&&</span> <span class="name">board</span>.<span class="name">children</span>[<span class="number">2</span>].<span class="name">state</span> <span class="operator">==</span> <span class="name">board</span>.<span class="name">children</span>[<span class="number">6</span>].<span class="name">state</span> <span class="operator">!=</span> <span class="string">""</span>) <span class="keyword">return</span> <span class="number">true</span> <span class="keyword">return</span> <span class="number">false</span> } <span class="keyword">function</span> <span class="name">restartGame</span>() { <span class="name">game</span>.<span class="name">running</span> <span class="operator">=</span> <span class="number">true</span> <span class="keyword">for</span> (<span class="keyword">var</span> <span class="name">i</span>=<span class="number">0</span>; <span class="name">i</span><span class="operator"><</span><span class="number">9</span>; ++<span class="name">i</span>) <span class="name">board</span>.<span class="name">children</span>[<span class="name">i</span>].<span class="name">state</span> <span class="operator">=</span> <span class="string">""</span> } <span class="keyword">function</span> <span class="name">makeMove</span>(<span class="name">pos</span>, player) { <span class="name">board</span>.<span class="name">children</span>[<span class="name">pos</span>].<span class="name">state</span> <span class="operator">=</span> <span class="name">player</span> <span class="keyword">if</span> (<span class="name">winner</span>(<span class="name">board</span>)) { <span class="name">gameFinished</span>(<span class="name">player</span> <span class="operator">+</span> <span class="string">" wins"</span>) <span class="keyword">return</span> <span class="number">true</span> } else { <span class="keyword">return</span> <span class="number">false</span> } } <span class="keyword">function</span> <span class="name">canPlayAtPos</span>(<span class="name">pos</span>) { <span class="keyword">return</span> <span class="name">board</span>.<span class="name">children</span>[<span class="name">pos</span>].<span class="name">state</span> <span class="operator">==</span> <span class="string">""</span> } <span class="keyword">function</span> <span class="name">computerTurn</span>() { var <span class="name">r</span> = <span class="name">Math</span>.<span class="name">random</span>(); <span class="keyword">if</span> (<span class="name">r</span> <span class="operator"><</span> <span class="name">game</span>.<span class="name">difficulty</span>) <span class="name">smartAI</span>(); else <span class="name">randomAI</span>(); } <span class="keyword">function</span> <span class="name">smartAI</span>() { <span class="keyword">function</span> <span class="name">boardCopy</span>(<span class="name">a</span>) { var <span class="name">ret</span> = new <span class="name">Object</span>; <span class="name">ret</span>.<span class="name">children</span> <span class="operator">=</span> new <span class="name">Array</span>(<span class="number">9</span>); <span class="keyword">for</span> (<span class="keyword">var</span> <span class="name">i</span> = <span class="number">0</span>; <span class="name">i</span><span class="operator"><</span><span class="number">9</span>; i++) { <span class="name">ret</span>.<span class="name">children</span>[<span class="name">i</span>] <span class="operator">=</span> new <span class="name">Object</span>; <span class="name">ret</span>.<span class="name">children</span>[<span class="name">i</span>].<span class="name">state</span> <span class="operator">=</span> <span class="name">a</span>.<span class="name">children</span>[<span class="name">i</span>].<span class="name">state</span>; } <span class="keyword">return</span> <span class="name">ret</span>; } <span class="keyword">for</span> (<span class="keyword">var</span> <span class="name">i</span>=<span class="number">0</span>; <span class="name">i</span><span class="operator"><</span><span class="number">9</span>; i++) { var <span class="name">simpleBoard</span> = <span class="name">boardCopy</span>(<span class="name">board</span>); <span class="keyword">if</span> (<span class="name">canPlayAtPos</span>(<span class="name">i</span>)) { <span class="name">simpleBoard</span>.<span class="name">children</span>[<span class="name">i</span>].<span class="name">state</span> <span class="operator">=</span> <span class="string">"O"</span>; <span class="keyword">if</span> (<span class="name">winner</span>(<span class="name">simpleBoard</span>)) { <span class="name">makeMove</span>(<span class="name">i</span>, <span class="string">"O"</span>) <span class="keyword">return</span> } } } <span class="keyword">for</span> (<span class="keyword">var</span> <span class="name">i</span>=<span class="number">0</span>; <span class="name">i</span><span class="operator"><</span><span class="number">9</span>; i++) { var <span class="name">simpleBoard</span> = <span class="name">boardCopy</span>(<span class="name">board</span>); <span class="keyword">if</span> (<span class="name">canPlayAtPos</span>(<span class="name">i</span>)) { <span class="name">simpleBoard</span>.<span class="name">children</span>[<span class="name">i</span>].<span class="name">state</span> <span class="operator">=</span> <span class="string">"X"</span>; <span class="keyword">if</span> (<span class="name">winner</span>(<span class="name">simpleBoard</span>)) { <span class="name">makeMove</span>(<span class="name">i</span>, <span class="string">"O"</span>) <span class="keyword">return</span> } } } <span class="keyword">function</span> <span class="name">thwart</span>(<span class="name">a</span>,b,c) { <span class="comment">//If they are at a, try b or c</span> <span class="keyword">if</span> (<span class="name">board</span>.<span class="name">children</span>[<span class="name">a</span>].<span class="name">state</span> <span class="operator">==</span> <span class="string">"X"</span>) { <span class="keyword">if</span> (<span class="name">canPlayAtPos</span>(<span class="name">b</span>)) { <span class="name">makeMove</span>(<span class="name">b</span>, <span class="string">"O"</span>) <span class="keyword">return</span> <span class="number">true</span> } else <span class="keyword">if</span> (<span class="name">canPlayAtPos</span>(<span class="name">c</span>)) { <span class="name">makeMove</span>(<span class="name">c</span>, <span class="string">"O"</span>) <span class="keyword">return</span> <span class="number">true</span> } } <span class="keyword">return</span> <span class="number">false</span>; } <span class="keyword">if</span> (<span class="name">thwart</span>(<span class="number">4</span>,<span class="number">0</span>,<span class="number">2</span>)) <span class="keyword">return</span>; <span class="keyword">if</span> (<span class="name">thwart</span>(<span class="number">0</span>,<span class="number">4</span>,<span class="number">3</span>)) <span class="keyword">return</span>; <span class="keyword">if</span> (<span class="name">thwart</span>(<span class="number">2</span>,<span class="number">4</span>,<span class="number">1</span>)) <span class="keyword">return</span>; <span class="keyword">if</span> (<span class="name">thwart</span>(<span class="number">6</span>,<span class="number">4</span>,<span class="number">7</span>)) <span class="keyword">return</span>; <span class="keyword">if</span> (<span class="name">thwart</span>(<span class="number">8</span>,<span class="number">4</span>,<span class="number">5</span>)) <span class="keyword">return</span>; <span class="keyword">if</span> (<span class="name">thwart</span>(<span class="number">1</span>,<span class="number">4</span>,<span class="number">2</span>)) <span class="keyword">return</span>; <span class="keyword">if</span> (<span class="name">thwart</span>(<span class="number">3</span>,<span class="number">4</span>,<span class="number">0</span>)) <span class="keyword">return</span>; <span class="keyword">if</span> (<span class="name">thwart</span>(<span class="number">5</span>,<span class="number">4</span>,<span class="number">8</span>)) <span class="keyword">return</span>; <span class="keyword">if</span> (<span class="name">thwart</span>(<span class="number">7</span>,<span class="number">4</span>,<span class="number">6</span>)) <span class="keyword">return</span>; <span class="keyword">for</span> (<span class="keyword">var</span> <span class="name">i</span> =<span class="number">0</span>; <span class="name">i</span><span class="operator"><</span><span class="number">9</span>; i++) { <span class="keyword">if</span> (<span class="name">canPlayAtPos</span>(<span class="name">i</span>)) { <span class="name">makeMove</span>(<span class="name">i</span>, <span class="string">"O"</span>) <span class="keyword">return</span> } } <span class="name">restartGame</span>(); } <span class="keyword">function</span> <span class="name">randomAI</span>() { var <span class="name">unfilledPosns</span> = new <span class="name">Array</span>(); <span class="keyword">for</span> (<span class="keyword">var</span> <span class="name">i</span>=<span class="number">0</span>; <span class="name">i</span><span class="operator"><</span><span class="number">9</span>; ++<span class="name">i</span>) { <span class="keyword">if</span> (<span class="name">canPlayAtPos</span>(<span class="name">i</span>)) <span class="name">unfilledPosns</span>.<span class="name">push</span>(<span class="name">i</span>); } <span class="keyword">if</span> (<span class="name">unfilledPosns</span>.<span class="name">length</span> <span class="operator">==</span> <span class="number">0</span>) { <span class="name">restartGame</span>(); } else { var <span class="name">choice</span> = <span class="name">unfilledPosns</span>[<span class="name">Math</span>.<span class="name">floor</span>(<span class="name">Math</span>.<span class="name">random</span>() <span class="operator">*</span> <span class="name">unfilledPosns</span>.<span class="name">length</span>)]; <span class="name">makeMove</span>(<span class="name">choice</span>, <span class="string">"O"</span>); } } <span class="keyword">function</span> <span class="name">gameFinished</span>(<span class="name">message</span>) { <span class="name">messageDisplay</span>.<span class="name">text</span> <span class="operator">=</span> <span class="name">message</span> <span class="name">messageDisplay</span>.<span class="name">visible</span> <span class="operator">=</span> <span class="number">true</span> <span class="name">game</span>.<span class="name">running</span> <span class="operator">=</span> <span class="number">false</span> }</pre> </div> <!-- 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