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• Can I use relative XPath expressions in libxml2?

  - by brbr

  I am wondering whether it is possible to use relative XPath expressions in libxml2. This is from the javax.xml.xpath API and I would like to do the similar thing using libxml2: Node widgetNode = (Node) xpath.evaluate(expression, document, XPathConstants.NODE); With a reference to the element, a relative XPath expression can now written to select the child element: XPath xpath = XPathFactory.newInstance().newXPath(); String expression = "manufacturer"; Node manufacturerNode = (Node) xpath.evaluate(expression, **widgetNode**, XPathConstants.NODE);

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• Set title of SplitViewController

  - by John

  I am using the SplitViewController template. How do I set the title on the topbar in the detailview? Been trying to work this out for hours. Tried simple: detailViewController.title = @"String"; but no luck. Any help appreciated. Thanks.

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• Save a <canvas> as a file in a form

  - by Pierre

  Using Canvas method toDataURL, I would like to be able to save the image on the server side (using Rails). With toDataURL string, how to use it in a form that can be seen as a file attachment in a HTML form ?

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• I get a error message from my vb6 program.

  - by user292084

  Private Sub Command1_Click() Dim dom As New DOMDocument Dim http As New XMLHTTP Dim strRet As String If Not dom.Load("c:\\CH.xml") Then MsgBox "?????" http.Open "Post", "http://172.31.132.173/u8eai/import.asp", True '?????ASP http.send dom.xml '?xml???????? strRet = http.responseText 'strRet:???xml??????? MsgBox strRet End Sub The error message, in Chinese: ???? ???????????????. translated by google(To English): Real-time error The data needed to complete the operation can not be used also

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• generic identifier

  - by Werner

  Hi, as I probably do not describe the problem in the right terms, I was not able to get an answer with google. Please excuse! In the following code, I would like to replace 'hardcoded' identifier COMMENT with the variable editedField. How to do that? var editedField:String = event.dataField; if (model.multipleProcessingData[i][editedInformationProductNO].COMMENT != null{ ... }

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• How to change HEX value to EBCDIC char

  - by vininet

  What is the simplest way to convert HEX value to ebcdic char type in Java e.g. The example below will return at sign but I would like to get ebcidic equivalent i.e. space char.. String hex = "40"; char c = (char) Integer.parseInt(hex, 16);

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• Python Fabric: How to handle arbitrary remote shell prompt for input?

  - by Jay

  This is related to this question here, but with a slight twist: instead of just passing 'yes' or 'no', I need Fabric to pass an arbitrary string to the remote shell. For instance, if the remote shell prompts for 'what is your name?' then I need to feed it 'first,last'

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• mysql datetime performance

  - by praksant

  Hi, since in mysql datetime field is represented as string (i'm not sure how it works internally), wouldn't be from performance point of view faster to store date as unix timestamp? I don't need to use any mysql native date functions, i'm going for performance of sorting and selecting data. if there was an index for that column, would be difference between int and datetime? Thank you

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• Given the full path to a file, how do I get just the path without the filename?

  - by Zerobu

  Hello, Suppose I have a path in a string called '/home/user/directory/HelloWorld.txt'. I would like to remove the HelloWorld.txt, and end up with '/home/user/directory'. What regex would I need.

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• Using grails service in domain class

  - by BlackPanther

  In my grails application I want use service.However it is always coming as null.I am using grails 1.1 version.How to solve this problem. Sample code: class A{ String name; def testService; static transients=['testService'] } Can we use service inside domain class?

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• Setting a null value in JSF

  - by DD

  I'm trying to set a property to null in JSF but it is interpretting null as a String. Is there a way to do this:

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• Best practice to handle non-english characters in Ruby?

  - by ragnarius

  My program file is encoded in UTF-8 so "abc".length == 3 but "åäö".length == 6. I realize that å, ä, ö, etc. are stored as two bytes in UTF-8, and that a Ruby String is a sequence of bytes (not characters), but it is annoying! Is there a best practice to work around this problem?

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• How to explain method calls?

  - by forki23

  Hi, let's consider a small method: int MyFunction(string foo, int bar) { ... } and some calls: MyFunction("",0) int x = MyFunction(foo1,bar1) How would you explain this to a non-technical persons? Has anybody a nice metaphor? I tried to explain method calling (or function application) several times, but I failed. Seems I can't find the right words here. Regards, forki

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• return type of main in java

  - by girinie

  Hi I like to know why only void return type for main method in java. public static void main(String [] args) Why there is no other return types other than void for main method. Thanks

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• What is your best example of a violation of the Single Responsibility Principle?

  - by Jon Kruger

  I'm looking for some good examples of code that violates the Single Responsibility Principle. Don't show me any examples from Uncle Bob's books or web sites since those are plastered all over the internet, like this one: interface Modem { public void dial(String pno); public void hangup(); public void send(char c); public char recv(); }

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• How do I find multiple matches with one regular expression?

  - by christian studer

  I've got the following string: response: id="1" message="whatever" attribute="none" world="hello" The order of the attributes is random. There might be any number of other attributes. Is there a way to get the id, message and world attribute in one regular expression instead of applying the following three one after another? / message="(.*?)"/ / world="(.*?)"/ / id="(.*?)"/

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• how to encode a datetime in a QueryString and read it in the asp:QueryStringParameter

  - by DavRob60

  How to encode a datetime in a QueryString and read it in the asp:QueryStringParameter out: (it's a asp:HyperLink NavigateUrl ) String.Format("~/Reports/Logs/Option_History.aspx?OptionID={0}&time={1}", id, time) in: <asp:QueryStringParameter Name="time" QueryStringField="Time" Type="DateTime" ConvertEmptyStringToNull="true" />

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• How do I determine whether I am going "forward" or "backward" through my History in GWT?

  - by Stephen Cagle

  I am looking at History and History JavaDocs in GWT and I notice that there is no way to tell whether the forward or backward button was pressed (either pragmatically or by the user). The "button press" is handled by your registered addValueChangeHandler, but the only thing passed to the handler is a string on your history stack. There is no indication as to whether the "History" is moving "back" (using the back arrow button) or "forward" (using the right arrow button). Is there any way to determine this?

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• How efficient is PHP's substr?

  - by zildjohn01

  I'm writing a parser in PHP which must be able to handle large in-memory strings, so this is a somewhat important issue. (ie, please don't "premature optimize" flame me, please) How does the substr function work? Does it make a second copy of the string data in memory, or does it reference the original? Should I worry about calling, for example, $str = substr($str, 1); in a loop?

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• Dottrace Dead vs. Garbage

  - by Moshe

  After reading the dottrace documentation I realized that: Dead objects are objects deleted before the end point of the snapshot. Garbage objects are objects allocated after the starting point and deleted before the end point - in other words, "Garbage objects" is a subset of "Dead objects". But after doing some profiling sessions, I could see that sometimes the number of "Garbage objects" is by far greater than the number of "Dead objects" of the same class (for example System.String). How should I interpret this phenomenon?

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• ASP.NET MVC Html.textbox - How to validate numbers only?

  - by gmang

  With the HTML helper, how would you enforce number only without submitting? I know it was done with regular expression if you had a textbox in classic ASP.NET <%=Html.TextBox("txtYearOfWork",String.Empty, new { maxlength = 4, size="5", autocomplete = "off" }) %

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• Hotfixing Code running inside Web Container with Groovy

  - by raoulsson

  I have a webapp running that has a bug. I know how to fix it in the sources. However I cannot redeploy the app as I would have to take it offline to do so. (At least not right now). I now want to fix the code "at runtime". Surgery on the living object, so to speak. The app is implemented in Java and is build on top of Seam. I have added a Groovy Console to the app previous to the last release. (A way to run arbitrary code at runtime) The normal way of adding behaviour to a class with Groovy would be similar to this: String.metaClass.foo= { x -> x * x } println "anything".foo(3) This code added the method foo to java.lang.String and prints 9. I can do the same thing with classes running inside my webapp container. New instances will thereafter show the same behaviour: com.my.package.SomeService.metaClass.foo= { x -> x * x } def someService = new com.my.package.SomeService() println someService.foo(3) Works as excpected. All good so far. My problem is now that the container, the web framework, Seam in this case, has already instantiated and cached the classes that I would like to manipulate (that is change their behaviour to reflect my bug fix). Ideally this code would work: com.my.package.SomeService.metaClass.foo= { x -> x * x } def x = org.jboss.seam.Component.getInstance(com.my.package.SomeService) println x.foo(3) However the instantiation of SomeService has already happened and there is no effect. Thus I need a way to make my changes "sticky". Has the groovy magic gone after my script has been run? Well, after logging out and in again, I can run this piece of code and get the expected result: def someService = new com.my.package.SomeService() println someService.foo(3) So the foo method is still around and it looks like my change has been permanent... So I guess the question that remains is how to force Seam to re-instantiate all its components and/or how to permanently make the change on all living instances...?

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• Entity Framework 4 How to find the primary key?

  - by runxc1 Bret Ferrier

  I am trying to create a generic method using EF4 to find the primary key of an object. example public string GetPrimaryKey() { .... }

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• Sequence Diagram return a new constructed Object

  - by user256007

  I am drawing a Sequence Diagram where the scenario is. 1. an Actor calls :Table::query(query:String) :Table::query Calls :Connection::execute(query) :Connection::execute < a new :Row Object :Connection::execute calls :Row::fillData(result) :Connection::execute returns :Row ...... There are More But I am Stuck in Step 5 I cant Understand how to draw that, :Connection::execute returning the newly Constructed Row itself, in a Standard way.

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• SQL Join Statement

  - by mouthpiec

  Hi I have the following SQL SELECT statement SELECT bar_id, bar_name, town_name, advert_text FROM bar, towns, baradverts WHERE town_id = town_id_fk AND bar_id = bar_id_fk My problem is that since not every bar has an advert in table "baradverts", these bars are not coming up in the results. In other words I need a NULL for those bars that do not have an advert string.

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