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• XPath selection from path in XML content

  - by Wayne Robinson

  I have the following XML: <root> <name>The name</name> <long> <path> <value>Some Value</value> </path> </long> <field>/root/name</field> <field>/root/long/path/value</field> </root> and I want to select these paths in the field tags however, when I try the following: <xsl:value-of select="/root/field[1]" /> all I get is the text value of the field. Is there a way of selecting the correct node from those values?

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• Prevent content with child nodes from being deleted in umbraco

  - by Soldarnal

  I would like to prevent content nodes from being trashed if they have any children. I setup an event handler like so: public class KeepSafeEvents : ApplicationBase { public KeepSafeEvents() { Document.BeforeMoveToTrash += new Document.MoveToTrashEventHandler(Document_BeforeMoveToTrash); } void Document_BeforeMoveToTrash(Document sender, umbraco.cms.businesslogic.MoveToTrashEventArgs e) { if (sender.HasChildren) { e.Cancel = true; } } } However, this doesn't seem to work. I assume it is because the delete process moves the child nodes to trash first before dealing with the parent node (which then has no children). Is there another possible solution? Or am I making a simple mistake above?

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• J2EE/EJB + service locator: is it safe to cache EJB Home lookup result ?

  - by Guillaume

  In a J2EE application, we are using EJB2 in weblogic. To avoid losing time building the initial context and looking up EJB Home interface, I'm considering the Service Locator Pattern. But after a few search on the web I found that event if this pattern is often recommended for the InitialContext caching, there are some negative opinion about the EJB Home caching. Questions: Is it safe to cache EJB Home lookup result ? What will happen if one my cluster node is no more working ? What will happen if I install a new version of the EJB without refreshing the service locator's cache ?

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• Qt Direct Connection

  - by user152508

  Hello I have created Qt tree control( and its nodes ) in different thread than the main thread. In the main thread I want to show context menu for the clicked node, so I am connectiong the actions in the menu with appropriate slots in the main thread. The connect function returns true , but slot is never executed. If I explicitly say in connect function that this is Qt :: DirectConnection then everything works fine. Why is this ? I I create my tree in main thread, everything also works fine , without having to say that this is Qt::DirectConnection .

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• recursively reverse linked list.

  - by Amanda

  I am implementing a function to recursively reverse a linked-list, but getting seg-fault. typedef struct _node { int data; struct _node *next; } Node, *NodeP; NodeP recursiveReverseList(NodeP first){ if(first == NULL) return NULL; if(first->next == NULL) return head; NodeP rest = recursiveReverseList(head->next); rest->next = first; first->next = NULL; return first; } Can you please help. P.S. The iterative version is working fine though. Its not homework. Just practicing C.

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• PowerShell: How to add XmlElement to a non-root element

  - by Ariel

  I'm having trouble adding an XmlElement to a non-root element in PowerShell. Basically, given this xml: <clubs> <club name="boca" position="1"> <field>bombonera</field> <field>bombonerita</field> </club> <club name="racing" position="19"> <field>cilindro</field> </club> </clubs> I create an element, $new = $clubs.CreateElement("Barracas") When I try to add this element to a non-root node i.e. $clubs.clubs.club += $new I get Cannot set "club" because only strings can be used as values to set XmlNode properties. What am I missing? Thanks in advance.

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• RemoteWebDriver doesn't work with xpath

  - by questions

  I'm trying to use RemoteWebDriver with xpath locators on google.com, this is the log from node running firefox. It receives all those commands but doesn't executes them. I dont see any activity with browser, other than opening google homepage. 14:05:05.671 INFO - Executing: [get: http://google.com] at URL: /session/1341695 049401/url) 14:05:06.260 INFO - Done: /session/1341695049401/url 14:05:06.301 INFO - Executing: [find element: By.xpath: //*[@id="gbqfqw"]] at UR L: /session/1341695049401/element) 14:05:06.453 INFO - Done: /session/1341695049401/element 14:05:06.495 INFO - Executing: [send keys: 0 org.openqa.selenium.support.events. EventFiringWebDriver$EventFiringWebElement@74d5f412, [StackOverflow]] at URL: /se ssion/1341695049401/element/0/value) 14:05:06.796 INFO - Done: /session/1341695049401/element/0/value 14:05:06.822 INFO - Executing: [find element: By.xpath: //*[@id="gbqfb"]] at URL : /session/1341695049401/element) 14:05:06.935 INFO - Done: /session/1341695049401/element 14:05:06.987 INFO - Executing: [click: 1 org.openqa.selenium.support.events.Even tFiringWebDriver$EventFiringWebElement@7b64218d] at URL: /session/1341695049401/ element/1/click) 14:05:09.627 INFO - Executing: org.openqa.selenium.remote.server.handler.Status@ 6349a3ca at URL: /status) 14:05:09.627 INFO - Done: /status I tried with By.name(q) and it works.

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• Obtain all keys of a Neo4j index

  - by MattiSG

  I have a Neo4j database whose content is generated dynamically from a big dataset. All “entry points” nodes are indexed on a named index (IndexManager.forNodes(…)). I can therefore look up a particular “entry point” node. However, I would now like to enumerate all those specific nodes, but I can't know on which key they were indexed. Is there any way to enumerate all keys of a Neo4j Index? If not, what would be the best way to store those keys, a data type that is eminently non-graph-oriented? UPDATE (thanks for asking details :) ): the list would be more than 2 million entries. The main use case would be to never update it after an initialization step, but other use cases might need it, so it has to be somewhat scalable. Also, I would really prefer avoiding killing my current resilience abilities, so storing all keys at once, as opposed to adding them incrementally, would be a last-resort solution.

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• What is the difference between as="element()+" and as="element()*" in XSL?

  - by Rachel

  What is the difference between using as="element(data)+" and as="element(data)" in xsl:variable. The below XSL solution works if use "+" but not when i use "". Can some one clarify. XSL code: <xsl:variable name="insert-data" as="element(data)+"> <xsl:for-each select="$insert-file/insert-data/data"> <xsl:sort select="xsd:integer(@index)"/> <xsl:variable name="index" select="xsd:integer(@index)" /> <xsl:variable name="nodeName" select="@nodeName" /> <data nodeName="{$nodeName}" index="{@index}" text-id="{$main-root/*//*[@id=$nodeName]/text()[sum((preceding::text(), .)/string-length(.)) ge $index]/generate-id(.)}"> <xsl:copy-of select="node()"/> </data> </xsl:for-each>

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• getElementsByTagName() equivalent for textNodes

  - by levik

  Is there any way to get the collection of all textNode objects within a document? getElementsByTagName() works great for Elements, but textNodes are not Elements. Update: I realize this can be accomplished by walking the DOM - as many below suggest. I know how to write a DOM-walker function that looks at every node in the document. I was hoping there was some browser-native way to do it. After all it's a little strange that I can get all the <input>s with a single built-in call, but not all textNodes.

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• Dynamically adding Views in Silverlight & MVVM

  - by dvox

  Hi all, I am starting to re-write my whole silverlight business application in the MVVM pattern; My first stop-point is this: I have a page (View1) with corresponding ViewModel1 (with a property 'IEnumerable AllData'); Now, within this View, I want to have i.e. a tree-view control, in which one node will be populated with another View2; My question is: 1. How to do it? - I can't loop through the AllData property since it is asynchronously loaded... - thus I don't know the number of View2s' to insert - I don't know how to do it from ViewModel1 :( Will I need ViewModel2 with property 'MyDataEntity CurrentData'? or I can bind to AllData property from ViewModel1 Can you help me out? Thanks

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• Data structure for unrooted trees

  - by Esmond

  I'm having problems figuring out how to build an unrooted tree with weighted edges and what data structure to store such a tree. An example of an unrooted tree would be like the one here: http://www.bio.davidson.edu/courses/GENOMICS/seq/unrooted.gif The problem i am having is the leaves would only have 1 link to the internal nodes and the internal nodes would have 3 links(the internal nodes would have 2 children and a link to another internal node). Do i have to distinguish between the 2 different kinds of nodes or can i have one class having the function of both types of nodes?

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• Using Dom Objects in PHP, the default namespace is redeclared in some nodes.

  - by TomcatExodus

  I'm working on a template engine, having migrated from regex driven to DOM driven. It appears though, that whenever I create a DomDocumentFragment to encapsulate some portion of a document temporarily, the namespace attribute is added to each node in the fragment. Since my default namespace for a given document will 99% of the time be XHTML, it's adding the XHTML namespace declaration. Being the default namespace, this seems fruitless, and ultimately nodes in any other namespace will be stripped out at render time anyways. Aside from iteratively removing namespace attributes, is there some way I can prevent this from occurring to begin with? Its quite problematic, as this will likely increase render time filesize considerably, as large portions of a given document may be stored in a fragment. I've tried $doc->normalizeDocument(), but as I assumed, it did nothing.

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• WCF + NserviceBus Names notation

  - by John

  Hi. I trying to create WCF via NserviceBus. Create contract: [ServiceContract] public interface INotifyBusService { [OperationContract(Action = "http://tempuri.org/IWcfServiceOf_RequestMessage_ResultType/Process", ReplyAction = "http://tempuri.org/IWcfServiceOf_RequestMessage_ResultType/ProcessResponse")] ResultType Notify(RequestMessage request); } The problem: When i create a clinet it can't handle this service because expected node with name "Process" in "http://tempuri.org/" namespace. if I do like that [OperationContract(Name = "Process", Action = "http://tempuri.org/IWcfServiceOf_RequestMessage_ResultType/Process", ReplyAction = "http://tempuri.org/IWcfServiceOf_RequestMessage_ResultType/ProcessResponse")] ResultType Notify(RequestMessage request); Everything works fine. Name = "Process" - it's a NServiceBus hardcode, like Enum return type in service method ?

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• not working function with no errors

  - by aya

  hello.. I've implemented a function to display an avl tree after inserting nodes into it like this template void AVLtree::display() const { display(Proot); } template void AVLtree::display(Node * ptr) const { if(ptr==0) return ; cout<value<<" "; display(ptr-Pleft); display(ptr-Pright); } after compiling,there were no errors ,the program worked but nothing were printed on the screen help me please....!! thanks

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• Can events fired from an iframe be handled by elements in its parent?

  - by allyourcode

  Suppose I have a page located at www.example.com/foo, and it contains an iframe with src="http://www.example.com/bar". I want to be able to fire an event from /bar and have it be heard by /foo. Using the Prototype library, I've tried doing the following without success: Element.fire(parent, 'ns:frob'); When I do this, in ff 3.5, I get the following error: Node cannot be used in a document other than the one in which it was created" code: "4 Line 0 Not sure if that's related to my problem. Is there some security mechanism that's preventing scripts in /bar from kicking off events in /foo?

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• What is the use of commit messages?

  - by eteubert

  Hi folks, I struggled asking that question but here it is. I am using source control since several years for multiple projects using different systems (svn, hg, git) and I learned how to improve my messages by following guidelines etc. But as far as I can remember I never ever had a look at them afterwards. So ... how do you profit from your own commit messages? When I need to go back because I smashed something and need a fresh start, I usually just go back to the latest "node" (where I started or merged a branch). Do I write those messages just for people monitoring the project who are curious what is going on? Regards

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• Profiling and Graphics.updateDisplay0()

  - by AD

  I am profiling my BlackBerry application (a game) with the options 'In method only' and 'Time including native method'. Under the 'All methods' node (after a decent run of the game) the single most time consuming function is Graphics.updateDisplay0() with over 50% of the run time spent there. I don't quite know what is the purpose of that function or if I can do anything to reduce its processing time, so if anyone can shed some light on the matter, I would be grateful. Because from what I understand with the 'In method only' option, it means there is some processing within that function. ps. there is no information on that function in the documentation.

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• Linq to xml : can't load all elements

  - by aleo

  hello i'm trying to load some elements from a xml file. but it XDocument.Load seems not treating xml file properly in this case, the method returns the content of the xml file as one node. here is my xml content: <processes> <process>winamp</process> <process>Acrobat</process> <process>WinRAR</process> </processes> and the code that reads the file: XDocument loaded = XDocument.Load("/process_list.xml"); var x = from a in loaded.Descendants("processes") select a.Element("process"); foreach (var t in x) { Console.WritleLine(t.Value.ToString()); } thank you

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• c++ programming for clusters and HPC

  - by Abruzzo Forte e Gentile

  HI All I need to write a scientific application in C++ doing a lot of computations and using a lot of memory. I have part of the job but due to high requirements in terms of resources I was thinking to start moving to OpenMPI. Before doing that I have a simple curiosity: If I understood the principle of OpenMPI is the developer that has the task of splitting the jobs over different nodes calling SEND and RECEIVE based on node available at that time. Do you know if it does exist some library or OS or whatever that has this capability letting my code reamain as it is now? Basically something that connects all computers and let share as one their memory and CPU? I am a bit confused because of the high material available on the topic. Should I look at cloud computing? or Distributed Shared Memory? Can you help me or address me a bit? Thanks

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• Any tips of how to handle hierarchial trees in relational model?

  - by George

  Hello all. I have a tree structure that can be n-levels deep, without restriction. That means that each node can have another n nodes. What is the best way to retrieve a tree like that without issuing thousands of queries to the database? I looked at a few other models, like flat table model, Preorder Tree Traversal Algorithm, and so. Do you guys have any tips or suggestions of how to implement a efficient tree model? My objective in the real end is to have one or two queries that would spit the whole tree for me. With enough processing i can display the tree in dot net, but that would be in client machine, so, not much of a big deal. Thanks for the attention

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• Drupal, Lightbox2: how can I disable the autoloading of css and javascript on triggering ?

  - by Patrick

  is there any way to disable the tag in the lightbox modal in drupal ? I've just realized it loads again all javascripts and css files of my page, and it is quite annoying, since it is not even an iFrame.. it is modal version.. and I would like to re-use what I've already loaded in my page for it. See pictures: http://dl.dropbox.com/u/72686/lightbox1.png http://dl.dropbox.com/u/72686/lightbox2.png I guess this code is wrong. I should load the node differently: " rel="lightmodal" class="LightLink" style="display:none;" title="" thanks

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• jquery-plugin Masonry: I cannot make it work

  - by Patrick

  hi, I'm using Masonry library (http://desandro.com/resources/jquery-masonry/) to create columns from my content. I cannot make it work.. this is the url with the html code: http://donatellabernardi.ch/drupal/ And this is my javascript line: $('#content-area').masonry({ columnWidth: 50, itemSelector:'.views-row'}); The Masonry function is invoked, but it doesn't add any column... I've also tried: $('#content-area').masonry({ columnWidth: 50, itemSelector:'.node'}); $('#content-area').masonry({ columnWidth: 50 }); $('div.view-content').masonry({ columnWidth: 50 }); What am I doing wrong ? Thanks

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• What is this Hash-like/Tree-like Construct Called?

  - by viatropos

  I want to create a "Config" class that acts somewhere between a hash and a tree. It's just for storing global values, which can have a context. Here's how I use it: Config.get("root.parent.child_b") #=> "value" Here's what the class might look like: class Construct def get(path) # split path by "." # search tree for nodes end def set(key, value) # split path by "." # create tree node if necessary # set tree value end def tree { :root => { :parent => { :child_a => "value", :child_b => "another value" }, :another_parent => { :something => { :nesting => "goes on and on" } } } } end end Is there a name for this kind of thing, somewhere between Hash and Tree (not a Computer Science major)? Basically a hash-like interface to a tree.

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• xmlserializer throwing InvalidOperationException

  - by AndyC

  I have an XmlSerializer object, and I have added 2 event handlers to the UnknownElement and UnknownAttribute events, as below: XmlSerializer xs = new XmlSerialiser(typeof(MyClass)); xs.UnknownAttribute += new XmlAttributeEventHandler(xs_UnknownAttribute); xs.UnknownElement += new XmlElementEventHandler(xs_UnknownAttribute); Each of these event handlers basically do the same thing, they print out the node name or the attribute name causing the issue. But for some reason, an InvalidOperationException is getting thrown saying there is an error in the xml document with . I thought these errors would be caught by my events?

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