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  • jstree select node

    - by niao
    Greetings, I am using jsTree to generatate my hierarchical data. JsTree is generated as follows: $(function() { $("#industries").tree({ data: { type: "json", opts: { url: "/Admin/GetIndustries/" } } }); }); it works find and the jsonresult is something like: [{"attributes":[],"data":{"title":"Adwokaci, Notariusze","id":"1a051101-c3fa-48f2-b2e1-c60d1b67ea22"},"children":[{"attributes":[],"data":{"title":"Kancelarie adwokackie","id":"26d6cff1-3c7f-4a2f-bf5a-422e08127b43" my question is: how can I save id of selected node in some hidden field? I do something like this: <script type="text/javascript"> $("#industries").click(function() { var tree = $.tree.reference("industries"); var t = $.tree.focused(); if (t.selected) t.selected; else alert("Select a node first"); alert(t.id); }); but it does not work. Can someone please help me?

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  • ExtJs - Set a fixed width in a center layout in a Panel

    - by Benjamin
    Hi all, Using ExtJs. I'm trying to design a main which is divided into three sub panels (a tree list, a grid and a panel). The way it works is that you have a tree list (west) with elements, you click on an element which populates the grid (center), then you click on an element in the grid and that generates the panel (west). My main panel containing the three other ones has been defined with a layout 'border'. Now the problem I face is that the center layout (the grid) has been defined in the code with a fixed width and the west panel as an auto width. But when the interface gets generated, the grid width is suddenly taking all the space in the interface instead of the west panel. The code looks like that: var exploits_details_panel = new Ext.Panel({ region: 'east', autoWidth: true, autoScroll: true, html: 'test' }); var exploit_commands = new Ext.grid.GridPanel({ store: new Ext.data.Store({ autoDestroy: true }), sortable: true, autoWidth: false, region: 'center', stripeRows: true, autoScroll: true, border: true, width: 225, columns: [ {header: 'command', width: 150, sortable: true}, {header: 'date', width: 70, sortable: true} ] }); var exploits_tree = new Ext.tree.TreePanel({ border: true, region: 'west', width: 200, useArrows: true, autoScroll: true, animate: true, containerScroll: true, rootVisible: false, root: {nodeType: 'async'}, dataUrl: '/ui/modules/select/exploits/tree', listeners: { 'click': function(node) { } } }); var exploits = new Ext.Panel({ id: 'beef-configuration-exploits', title: 'Auto-Exploit', region: 'center', split: true, autoScroll: true, layout: { type: 'border', padding: '5', align: 'left' }, items: [exploits_tree, exploit_commands, exploits_details_panel] }); Here 'var exploits' is my main panel containing the three other sub panels. The 'exploits_tree' is the tree list containing some elements. When you click on one of the elements the grid 'exploit_commands' gets populated and when you click in one of the populated elements, the 'exploits_details_panel' panel gets generated. How can I set a fixed width on 'exploit_commands'? Thanks for your time.

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  • How can I make a WPF TreeView data binding lazy and asynchronous?

    - by pauldoo
    I am learning how to use data binding in WPF for a TreeView. I am procedurally creating the Binding object, setting Source, Path, and Converter properties to point to my own classes. I can even go as far as setting IsAsync and I can see the GUI update asynchronously when I explore the tree. So far so good! My problem is that WPF eagerly evaluates parts of the tree prior to them being expanded in the GUI. If left long enough this would result in the entire tree being evaluated (well actually in this example my tree is infinite, but you get the idea). I would like the tree only be evaluated on demand as the user expands the nodes. Is this possible using the existing asynchronous data binding stuff in the WPF? As an aside I have not figured out how ObjectDataProvider relates to this task. My XAML code contains only a single TreeView object, and my C# code is: public partial class Window1 : Window { public Window1() { InitializeComponent(); treeView.Items.Add( CreateItem(2) ); } static TreeViewItem CreateItem(int number) { TreeViewItem item = new TreeViewItem(); item.Header = number; Binding b = new Binding(); b.Converter = new MyConverter(); b.Source = new MyDataProvider(number); b.Path = new PropertyPath("Value"); b.IsAsync = true; item.SetBinding(TreeView.ItemsSourceProperty, b); return item; } class MyDataProvider { readonly int m_value; public MyDataProvider(int value) { m_value = value; } public int[] Value { get { // Sleep to mimick a costly operation that should not hang the UI System.Threading.Thread.Sleep(2000); System.Diagnostics.Debug.Write(string.Format("Evaluated for {0}\n", m_value)); return new int[] { m_value * 2, m_value + 1, }; } } } class MyConverter : IValueConverter { public object Convert(object value, Type targetType, object parameter, System.Globalization.CultureInfo culture) { // Convert the double to an int. int[] values = (int[])value; IList<TreeViewItem> result = new List<TreeViewItem>(); foreach (int i in values) { result.Add(CreateItem(i)); } return result; } public object ConvertBack(object value, Type targetType, object parameter, System.Globalization.CultureInfo culture) { throw new InvalidOperationException("Not implemented."); } } } Note: I have previously managed to do lazy evaluation of the tree nodes by adding WPF event handlers and directly adding items when the event handlers are triggered. I'm trying to move away from that and use data binding instead (which I understand is more in spirit with "the WPF way").

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  • Right-click context menu for Java JTree?

    - by arcanex
    I'm trying to implement pop-up menus in Java JTree. I've sub-classed DefaultTreeCellRenderer (to change node appearance) and DefaultTreeCellEditor (to create Components to attach event listeners to, since apparently the Components that DefaultTreeCellRenderer.getTreeCellRendererComponent() returns can't do it?). I don't really want to "edit" the nodes, just be able to pop-up a menu when a node gets right-clicked, but this is the only way I can think of doing it right now... Below is the code that I have so far-- I'm just trying to figure out how to capture MouseEvents. It sort of works, but badly. What's a better way to accomplish what I'm trying to do here? private class My_TreeCellRenderer extends DefaultTreeCellRenderer { My_TreeCellRenderer() { super (); } public Component getTreeCellRendererComponent(JTree tree, Object value, boolean selected, boolean expanded, boolean leaf, int row, boolean hasFocus) { super.getTreeCellRendererComponent(tree, value, selected, expanded, leaf, row, hasFocus); // set label text and tool tips setText(((My_Object)value).getTreeLabel()); setToolTipText(((My_Object)value).getTreeToolTip()); return this; } } private class My_TreeCellEditor extends DefaultTreeCellEditor { private MouseAdapter ma; My_TreeCellEditor(JTree tree, DefaultTreeCellRenderer renderer) { super (tree, renderer); ma = new MouseAdapter() { public void mousePressed(MouseEvent e) { if (e.isPopupTrigger()) { System.out.println("My Popup"); } } public void mouseReleased(MouseEvent e) { if (e.isPopupTrigger()) { System.out.println("My Popup"); } } }; } public Component getTreeCellEditorComponent(JTree tree, Object value, boolean selected, boolean expanded, boolean leaf, int row) { String src_filename = null; // return non-editing component Component c = renderer.getTreeCellRendererComponent(tree, value, selected, expanded, leaf, row, true); // add mouse listener if it's not listening already MouseListener mouseListeners[] = c.getMouseListeners(); int i; for (i=0; i < mouseListeners.length && mouseListeners[i] != ma; i++); if (i >= mouseListeners.length) c.addMouseListener(ma); return c; } protected boolean canEditImmediately(EventObject event) { if (event instanceof MouseEvent && ((MouseEvent)event).getClickCount() == 1) return true; else return false; } }

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  • jQuery accordion menu - keep accordion menu open to the page I am on

    - by MelissaTA
    Hi everyone, I hope you can help. I'm very new to jQuery and am working on a five- or six-level accordion menu for my side navigation. I got the majority of the code I have so far from Dane Peterson @ daneomatic.com (thanks Dane!). But, I'm stuck on one thing: I'd like to have my accordion/tree work like this: When I navigate down into, say, level three, and click on the link to open the page linked to that level, how do I indicate once the level three page loads that I'm on that page? Also, how do I keep the tree open to that level when I load the page? I guess what I'm asking is: is there a way for the accordion/tree to automatically update to show what page you're at, and have the tree open to that level? Thanks in advance!

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  • Change the default SqlCommand CommandTimeout with configuration rather than recompile?

    - by robertc
    I am supporting an ASP.Net 3.5 web application and users are experiencing a timeout error after 30 seconds when trying to run a report. Looking around the web it seems it's easy enough to change the timeout in the code, unfortunately I'm not able to access the code and recompile. Is there anyway to configure the default for either the web app, the worker process, IIS or the whole machine? Here is the stack trace up to the point where it's in System.Data in case I'm missing some other problem: [SqlException (0x80131904): Timeout expired. The timeout period elapsed prior to completion of the operation or the server is not responding.] System.Data.SqlClient.SqlConnection.OnError(SqlException exception, Boolean breakConnection) +1948826 System.Data.SqlClient.SqlInternalConnection.OnError(SqlException exception, Boolean breakConnection) +4844747 System.Data.SqlClient.TdsParser.ThrowExceptionAndWarning(TdsParserStateObject stateObj) +194 System.Data.SqlClient.TdsParser.Run(RunBehavior runBehavior, SqlCommand cmdHandler, SqlDataReader dataStream, BulkCopySimpleResultSet bulkCopyHandler, TdsParserStateObject stateObj) +2392 System.Data.SqlClient.SqlDataReader.ConsumeMetaData() +33 System.Data.SqlClient.SqlDataReader.get_MetaData() +83 System.Data.SqlClient.SqlCommand.FinishExecuteReader(SqlDataReader ds, RunBehavior runBehavior, String resetOptionsString) +297 System.Data.SqlClient.SqlCommand.RunExecuteReaderTds(CommandBehavior cmdBehavior, RunBehavior runBehavior, Boolean returnStream, Boolean async) +954 System.Data.SqlClient.SqlCommand.RunExecuteReader(CommandBehavior cmdBehavior, RunBehavior runBehavior, Boolean returnStream, String method, DbAsyncResult result) +162 System.Data.SqlClient.SqlCommand.RunExecuteReader(CommandBehavior cmdBehavior, RunBehavior runBehavior, Boolean returnStream, String method) +32 System.Data.SqlClient.SqlCommand.ExecuteReader(CommandBehavior behavior, String method) +141 System.Data.SqlClient.SqlCommand.ExecuteDbDataReader(CommandBehavior behavior) +12 System.Data.Common.DbCommand.System.Data.IDbCommand.ExecuteReader(CommandBehavior behavior) +10 System.Data.Common.DbDataAdapter.FillInternal(DataSet dataset, DataTable[] datatables, Int32 startRecord, Int32 maxRecords, String srcTable, IDbCommand command, CommandBehavior behavior) +130 System.Data.Common.DbDataAdapter.Fill(DataTable[] dataTables, Int32 startRecord, Int32 maxRecords, IDbCommand command, CommandBehavior behavior) +162 System.Data.Common.DbDataAdapter.Fill(DataTable dataTable) +115 --Edit There must be something outside the code itself - I've downloaded the database and run it against the same web site installed on a test server and it runs for longer than 30 seconds and returns the report. I've compared the machine.config and web.config files from the .Net directory on the live and test and they seem the same, compared the two IIS setups, also looked at the SQL Server configuration and the only difference is that the live server is clustered on 64bit W2K3 while the test server is on 32bit.

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  • Exposing a pointer in Boost.Python

    - by Goose Bumper
    I have this very simple C++ class: class Tree { public: Node *head; }; BOOST_PYTHON_MODULE(myModule) { class_<Tree>("Tree") .def_readwrite("head",&Tree::head) ; } I want to access the head variable from Python, but the message I see is: No to_python (by-value) converter found for C++ type: Node* From what I understand, this happens because Python is freaking out because it has no concept of pointers. How can I access the head variable from Python? I understand I should use encapsulation, but I'm currently stuck with needing a non-encapsulation solution.

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  • Config for WCF with multiple endpoints

    - by vdh_ant
    Hi guys I'm new to WCF and am trying to get some ideas I have off the ground. Basically I have a web WCF Application project with the following in its web.config: <system.serviceModel> <services> <service name="WcfService1.ServiceContract.IDirectorySearchService" behaviorConfiguration="defaultServiceBehavior"> <endpoint name="restxml" address="xml" binding="webHttpBinding" contract="WcfService1.ServiceContract.IDirectorySearchServiceXml" behaviorConfiguration="xmlRestBehavior"/> <endpoint name="restjson" address="json" binding="webHttpBinding" contract="WcfService1.ServiceContract.IDirectorySearchServiceJson" behaviorConfiguration="jsonRestBehavior"/> <endpoint name="soap" address="soap" binding="basicHttpBinding" contract="WcfService1.ServiceContract.IDirectorySearchService"/> <endpoint name="mex" address="mex" binding="mexHttpBinding" contract="IMetadataExchange"/> </service> </services> <behaviors> <serviceBehaviors> <behavior name="defaultServiceBehavior"> <serviceDebug includeExceptionDetailInFaults="true"/> </behavior> </serviceBehaviors> <endpointBehaviors> <behavior name="xmlRestBehavior"> <webHttp/> </behavior> <behavior name="jsonRestBehavior"> <enableWebScript/> </behavior> </endpointBehaviors> </behaviors> </system.serviceModel> My interfaces look like this: [ServiceContract] public interface IDirectorySearchServiceXml { [OperationContract] [WebGet(UriTemplate = "Search/")] SearchResults Search(); } [ServiceContract] public interface IDirectorySearchServiceJson { [OperationContract] [WebGet(UriTemplate = "Search/")] SearchResults Search(); } [ServiceContract] public interface IDirectorySearchService { [OperationContract] SearchResults Search(int? sportId, int? instituteId, DateTime? startDate, DateTime? endDate); } Now the part I am having a little trouble with is what else I need to get this up and running... Like given this what .svc files do I need and do I have the config right... Also what addresses do I need to use to get this running either through the browser or through the WCF test client. Note I am currently using 3.5. Cheers Anthony

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  • Automatically calling OnDetaching() for Silverlight Behaviors

    - by Dan Auclair
    I am using several Blend behaviors and triggers on a silverlight control. I am wondering if there is any mechanism for automatically detaching or ensuring that OnDetaching() is called for a behavior or trigger when the control is no longer being used (i.e. removed from the visual tree). My problem is that there is a managed memory leak with the control because of one of the behaviors. The behavior subscribes to an event on some long-lived object in the OnAttached() override and should be unsubscribing to that event in the OnDetaching() override so that it can become a candidate for garbage collection. However, OnDetaching() never seems to be getting called when I remove the control from the visual tree... the only way I can get it to happen is by explicit detaching the behavior BEFORE removing the control and then it is properly garbage collected. Right now my only solution was to create a public method in the code-behind for the control that can go through and detach any known behaviors that would cause garbage collection problems. It would be up to the client code to know to call this before removing the control from the panel. I don't really like this approach, so I am looking for some automatic way of doing this that I am overlooking or a better suggestion. public void DetachBehaviors() { foreach (var behavior in Interaction.GetBehaviors(this.LayoutRoot)) { behavior.Detach(); } //... //continue detaching all known problematic behaviors.... }

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  • Whats wrong with this HQL query?

    - by ManBugra
    did i encounter a hibernate bug or do i have an error i dont see: select enty.number from EntityAliasName enty where enty.myId in ( select cons.myId from Consens cons where cons.number in ( select ord.number from Orders ord where ord.customer = :customer and ord.creationDate < ( select max(ord.creationDate) from Orders ord where ord.customer = :customer ) ) ) what i do get is the following: org.hibernate.util.StringHelper.root(StringHelper.java:257) Caused by: java.lang.NullPointerException at org.hibernate.util.StringHelper.root(StringHelper.java:257) at org.hibernate.persister.entity.AbstractEntityPersister.getSubclassPropertyTableNumber(AbstractEntityPersister.java:1391) at org.hibernate.persister.entity.BasicEntityPropertyMapping.toColumns(BasicEntityPropertyMapping.java:54) at org.hibernate.persister.entity.AbstractEntityPersister.toColumns(AbstractEntityPersister.java:1367) at org.hibernate.hql.ast.tree.FromElement.getIdentityColumn(FromElement.java:320) at org.hibernate.hql.ast.tree.IdentNode.resolveAsAlias(IdentNode.java:154) at org.hibernate.hql.ast.tree.IdentNode.resolve(IdentNode.java:100) at org.hibernate.hql.ast.tree.FromReferenceNode.resolve(FromReferenceNode.java:117) at org.hibernate.hql.ast.tree.FromReferenceNode.resolve(FromReferenceNode.java:113) at org.hibernate.hql.ast.HqlSqlWalker.resolve(HqlSqlWalker.java:854) at org.hibernate.hql.antlr.HqlSqlBaseWalker.propertyRef(HqlSqlBaseWalker.java:1172) at org.hibernate.hql.antlr.HqlSqlBaseWalker.propertyRefLhs(HqlSqlBaseWalker.java:5167) at org.hibernate.hql.antlr.HqlSqlBaseWalker.propertyRef(HqlSqlBaseWalker.java:1133) at org.hibernate.hql.antlr.HqlSqlBaseWalker.selectExpr(HqlSqlBaseWalker.java:1993) at org.hibernate.hql.antlr.HqlSqlBaseWalker.selectExprList(HqlSqlBaseWalker.java:1932) at org.hibernate.hql.antlr.HqlSqlBaseWalker.selectClause(HqlSqlBaseWalker.java:1476) at org.hibernate.hql.antlr.HqlSqlBaseWalker.query(HqlSqlBaseWalker.java:580) at org.hibernate.hql.antlr.HqlSqlBaseWalker.selectStatement(HqlSqlBaseWalker.java:288) at org.hibernate.hql.antlr.HqlSqlBaseWalker.statement(HqlSqlBaseWalker.java:231) at org.hibernate.hql.ast.QueryTranslatorImpl.analyze(QueryTranslatorImpl.java:254) at org.hibernate.hql.ast.QueryTranslatorImpl.doCompile(QueryTranslatorImpl.java:185) at org.hibernate.hql.ast.QueryTranslatorImpl.compile(QueryTranslatorImpl.java:136) at org.hibernate.engine.query.HQLQueryPlan.<init>(HQLQueryPlan.java:101) at org.hibernate.engine.query.HQLQueryPlan.<init>(HQLQueryPlan.java:80) at org.hibernate.engine.query.QueryPlanCache.getHQLQueryPlan(QueryPlanCache.java:94) at org.hibernate.impl.SessionFactoryImpl.checkNamedQueries(SessionFactoryImpl.java:484) at org.hibernate.impl.SessionFactoryImpl.<init>(SessionFactoryImpl.java:394) at org.hibernate.cfg.Configuration.buildSessionFactory(Configuration.java:1341) using: Hibernate 3.3.2.GA / postgresql

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  • jquery dynatree class methods

    - by Jj Zhang
    I'm a new user of dynatree plugin. When I read the documentation, I found the list of tree and node class member functions, such as tree.getRoot(), node.countChildren(). However, when I tried to use them, it complained that no such methods were found. Here is a sample code I am testing with: var tree = ("#test").dynatree(treeData); var rootNode = tree.getRoot(); //not working var rootNode2 = ("#test").dynatree("getRoot"); //this works var numChildren = rootNode2.countChildren(); //not working Help please. Thanks. -JJ

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  • javascript compare two DOM trees

    - by Paul
    I want to compare the change of a DOM node after a user event is fired on it; but I don't know on which element a user would fire, so my idea is to (1) save the DOM tree before an event and (2) compare the saved tree with the updated DOM tree when an event is fired. My question are (1) is there any better way? and (2) if there is no other way, what would be the fast algorithm to compare two DOM trees?

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  • Git - Ignore certain files contained in specific folders

    - by Jim
    I'm using msysgit and have a project tree that contains many bin/ folders in the tree. Using the .gitignore file in the root of the project I need to ignore all .dll files that reside within a bin/ folder anywhere in the project tree. I've tried "bin/*.dll" but that doesn't work, I assume it is only working against the bin/ folder in the root of the project.

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  • how to pass an xml file to lxml to parse?

    - by BeeBand
    I'm trying to parse an xml file using lxml. xml.etree allowed me to simply pass the file name as a parameter to the parse function, so I attempted to do the same with lxml. My code: from lxml import etree from lxml import objectify file = "C:\Projects\python\cb.xml" tree = etree.parse(file) but I get the error: Traceback (most recent call last): File "cb.py", line 5, in <module> tree = etree.parse(file) File "lxml.etree.pyx", line 2698, in lxml.etree.parse (src/lxml/lxml.etree.c:4 9590) File "parser.pxi", line 1491, in lxml.etree._parseDocument (src/lxml/lxml.etre e.c:71205) File "parser.pxi", line 1520, in lxml.etree._parseDocumentFromURL (src/lxml/lx ml.etree.c:71488) File "parser.pxi", line 1420, in lxml.etree._parseDocFromFile (src/lxml/lxml.e tree.c:70583) File "parser.pxi", line 975, in lxml.etree._BaseParser._parseDocFromFile (src/ lxml/lxml.etree.c:67736) File "parser.pxi", line 539, in lxml.etree._ParserContext._handleParseResultDo c (src/lxml/lxml.etree.c:63820) File "parser.pxi", line 625, in lxml.etree._handleParseResult (src/lxml/lxml.e tree.c:64741) File "parser.pxi", line 565, in lxml.etree._raiseParseError (src/lxml/lxml.etr ee.c:64084) lxml.etree.XMLSyntaxError: AttValue: " or ' expected, line 2, column 26 What am I doing wrong?

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  • Python question, how to pass an xml file to lxml to parse?

    - by BeeBand
    I'm relatively new to python, my code is: from lxml import etree from lxml import objectify file = "C:\Projects\python\cb.xml" tree = etree.parse(file) but I get the error: Traceback (most recent call last): File "cb.py", line 5, in <module> tree = etree.parse(file) File "lxml.etree.pyx", line 2698, in lxml.etree.parse (src/lxml/lxml.etree.c:4 9590) File "parser.pxi", line 1491, in lxml.etree._parseDocument (src/lxml/lxml.etre e.c:71205) File "parser.pxi", line 1520, in lxml.etree._parseDocumentFromURL (src/lxml/lx ml.etree.c:71488) File "parser.pxi", line 1420, in lxml.etree._parseDocFromFile (src/lxml/lxml.e tree.c:70583) File "parser.pxi", line 975, in lxml.etree._BaseParser._parseDocFromFile (src/ lxml/lxml.etree.c:67736) File "parser.pxi", line 539, in lxml.etree._ParserContext._handleParseResultDo c (src/lxml/lxml.etree.c:63820) File "parser.pxi", line 625, in lxml.etree._handleParseResult (src/lxml/lxml.e tree.c:64741) File "parser.pxi", line 565, in lxml.etree._raiseParseError (src/lxml/lxml.etr ee.c:64084) lxml.etree.XMLSyntaxError: AttValue: " or ' expected, line 2, column 26 What am I doing wrong?

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  • Theory of formal languages - Automaton

    - by dader51
    Hi everybody ! I'm wondering about formal languages. I have a kind of parser : It reads à xml-like serialized tree structure and turn it into a multidimmensionnal array. I figured out that i need at least three variables to achieve the job : $tree = array(); // a new array $pTree = array(&$tree); // a new array which the first element points to $tree; $deep = 0; plus the one containing the sentence splitted into words. My point is on the similarities between the algorithm deing used and the differents kinds of automatons ( state machines turing machines stack ... ). The $words variable is the "tape" of the automaton, the test/conditions of the algorithm are transitions, $deep is the state and $tree is the output. I cannont figure what is $pTree. So the question is : which is the automaton I implictly use here, and to which formal languages family does it fit ? And what's about recursion ?

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  • TicTacToe AI Making Incorrect Decisions

    - by Chris Douglass
    A little background: as a way to learn multinode trees in C++, I decided to generate all possible TicTacToe boards and store them in a tree such that the branch beginning at a node are all boards that can follow from that node, and the children of a node are boards that follow in one move. After that, I thought it would be fun to write an AI to play TicTacToe using that tree as a decision tree. TTT is a solvable problem where a perfect player will never lose, so it seemed an easy AI to code for my first time trying an AI. Now when I first implemented the AI, I went back and added two fields to each node upon generation: the # of times X will win & the # of times O will win in all children below that node. I figured the best solution was to simply have my AI on each move choose and go down the subtree where it wins the most times. Then I discovered that while it plays perfect most of the time, I found ways where I could beat it. It wasn't a problem with my code, simply a problem with the way I had the AI choose it's path. Then I decided to have it choose the tree with either the maximum wins for the computer or the maximum losses for the human, whichever was more. This made it perform BETTER, but still not perfect. I could still beat it. So I have two ideas and I'm hoping for input on which is better: 1) Instead of maximizing the wins or losses, instead I could assign values of 1 for a win, 0 for a draw, and -1 for a loss. Then choosing the tree with the highest value will be the best move because that next node can't be a move that results in a loss. It's an easy change in the board generation, but it retains the same search space and memory usage. Or... 2) During board generation, if there is a board such that either X or O will win in their next move, only the child that prevents that win will be generated. No other child nodes will be considered, and then generation will proceed as normal after that. It shrinks the size of the tree, but then I have to implement an algorithm to determine if there is a one move win and I think that can only be done in linear time (making board generation a lot slower I think?) Which is better, or is there an even better solution?

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  • Python constructor does weird things with optional parameters

    - by christangrant
    Can you help me understand of the behaviour and implications of the python __init__ constructor. It seems like when there is an optional parameter and you try and set an existing object to a new object the optional value of the existing object is preserved and copied. Ok that was confusing... so look at an example I concocted below. In the code below I am trying to make a tree structure with nodes and possibly many children . In the first class NodeBad, the constructor has two parameters, the value and any possible children. The second class NodeGood only takes the value of the node as a parameter. Both have an addchild method to add a child to a node. When creating a tree with the NodeGood class, it works as expected. However, when doing the same thing with the NodeBad class, it seems as though a child can only be added once! The code below will result in the following output: Good Tree 1 2 3 [< 3 >] Bad Tree 1 2 2 [< 2 >, < 3 >] Que Pasa? Here is the Example: #!/usr/bin/python class NodeBad: def __init__(self, value, c=[]): self.value = value self.children = c def addchild(self, node): self.children.append(node) def __str__(self): return '< %s >' % self.value def __repr__(self): return '< %s >' % self.value class NodeGood: def __init__(self, value): self.value = value self.children = [] def addchild(self, node): self.children.append(node) def __str__(self): return '< %s >' % self.value def __repr__(self): return '< %s >' % self.value if __name__ == '__main__': print 'Good Tree' ng = NodeGood(1) # Root Node rootgood = ng ng.addchild(NodeGood(2)) # 1nd Child ng = ng.children[0] ng.addchild(NodeGood(3)) # 2nd Child print rootgood.value print rootgood.children[0].value print rootgood.children[0].children[0].value print rootgood.children[0].children print 'Bad Tree' nb = NodeBad(1) # Root Node rootbad = nb nb.addchild(NodeBad(2)) # 1st Child nb = nb.children[0] nb.addchild(NodeBad(3)) # 2nd Child print rootbad.value print rootbad.children[0].value print rootbad.children[0].children[0].value print rootbad.children[0].children

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  • Questions about linux root file system.

    - by smwikipedia
    I read the manual page of the "mount" command, at it reads as below: All files accessible in a Unix system are arranged in one big tree, the file hierarchy, rooted at /. These files can be spread out over several devices. The mount command serves to attach the file system found on some device to the big file tree. My questions are: Where is this "big tree" located? Suppose I have 2 disks, if I mount them onto some point in the "big tree", does linux place some "special marks" in the mount point to indicate that these 2 "mount directories" are indeed seperate disks?

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  • protection points in survivable mutlicast network

    - by wantobegeek
    I am working on a project on survivable multicasting.I want to propose a hybrid scheme(protection and restoration) for that purpose.Can anyone help me with an approach to decide protection points in a multicast tree??(The protection points will be those points upto which there will be an alternate path from the multicast source(protection) and from protection point to the multicast destination the path will be dynamically restored.).Pls suggest an approach to find the protection points.I found an approach name caterpillar tree which assigns the nodes on the spine of caterpillar tree as protection points.Is there any other such approach..?

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  • EXT JS toLayout on Viewport doesnt show anything...

    - by Nazariy
    After reading many example about adding new components in to existing container without reloading whole page I run in to small problem while combining tree and tabs inside Viewport component. What I'm trying to do is to register on click event to tree node and load in to content container new component, depending on node type it can be tabpanel, gridpanel or any other available component. here is short example of tree object: { xtype: 'treepanel', id: 'tree-panel', listeners: { click: function(n) { var content = Ext.getCmp('content-panel'); content.setTitle(n.attributes.qtip); //remove all components from content-panel content.removeAll(); content.add(dummy_tabs2); content.doLayout(); return; } }} All DOM manipulation went fine, everything registered properly, new Title shown, but dummy_tabs2 are not shown. I did try to set various properties for doLayout(true|false, true|false) but nothing happens. Am I doing something wrong?

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  • Can I call make runtime decided method calls in Java?

    - by Catalin Marin
    I know there is an invoke function that does the stuff, I am overall interested in the "correctness" of using such a behavior. My issue is this: I have a Service Object witch contains methods which I consider services. What I want to do is alter the behavior of those services without later intrusion. For example: class MyService { public ServiceResponse ServeMeDonuts() { do stuff... return new ServiceResponse(); } after 2 months I find out that I need to offer the same service to a new client app and I also need to do certain extra stuff like setting a flag, or make or updating certain data, or encode the response differently. What I can do is pop it up and throw down some IFs. In my opinion this is not good as it means interaction with tested code and may result in un wanted behaviour for the previous service clients. So I come and add something to my registry telling the system that the "NewClient" has a different behavior. So I'll do something like this: public interface Behavior { public void preExecute(); public void postExecute(); } public class BehaviorOfMyService implements Behavior{ String method; String clientType; public void BehaviorOfMyService(String method,String clientType) { this.method = method; this.clientType = clientType; } public void preExecute() { Method preCall = this.getClass().getMethod("pre" + this.method + this.clientType); if(preCall != null) { return preCall.invoke(); } return false; } ...same for postExecute(); public void preServeMeDonutsNewClient() { do the stuff... } } when the system will do something like this if(registrySaysThereIs different behavior set for this ServiceObject) { Class toBeCalled = Class.forName("BehaviorOf" + usedServiceObjectName); Object instance = toBeCalled.getConstructor().newInstance(method,client); instance.preExecute(); ....call the service... instance.postExecute(); .... } I am not particularly interested in correctness of code as in correctness of thinking and approach. Actually I have to do this in PHP, witch I see as a kind of Pop music of programming which I have to "sing" for commercial reasons, even though I play POP I really want to sing by the book, so putting aside my more or less inspired analogy I really want to know your opinion on this matter for it's practical necessity and technical approach. Thanks

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  • WPF TreeView PreviewMouseDown on TreeViewItem

    - by imekon
    If I handle the PreviewMouseDown event on TreeViewItem, I get events for everything I click on that TreeViewItem include the little +/- box to the left (Windows XP). How can I distinguish that? I tried the following: // We've had a single click on a tree view item // Unfortunately this is the WHOLE tree item, including the +/- // symbol to the left. The tree doesn't do a selection, so we // have to filter this out... MouseDevice device = e.Device as MouseDevice; // This is bad. The whole point of WPF is for the code // not to know what the UI has - yet here we are testing for // it as a workaround. Sigh... // This is broken - if you click on the +/- on a item, it shouldn't // go on to be processed by OnTreeSingleClick... ho hum! if (device.DirectlyOver.GetType() != typeof(Path)) { OnTreeSingleClick(sender); } What I'm after is just single click on the tree view item excluding the extra bits it seems to include.

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  • JTree keep expanding problem

    - by newbie123
    I want to keep my jTree file expanded. I using below code to expand the jTree : public void expandAll(JTree tree) { int row = 0; while (row < tree.getRowCount()) { tree.expandRow(row); row++; } } It works, but when I add in new file or delete file the jtree collapse back. How can keep the jTree expanded?

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  • Using Python, what's the best way to create a set of files on disk for testing?

    - by Chris R
    I'm looking for a way to create a tree of test files to unit test a packaging tool. Basically, I want to create some common file system structures -- directories, nested directories, symlinks within the selected tree, symlinks outside the tree, &c. Ideally I want to do this with as little boilerplate as possible. Of course, I could hand-write the set of files I want to see, but I'm thinking that somebody has to have automated this for a test suite somewhere. Any suggestions?

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