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Articles indexed Tuesday May 18 2010

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  • Reading from an write-only(OUT) parameter in pl/sql

    - by sqlgrasshopper5
    When I tried writing to an read-only parameter(IN) of a function, Oracle complains with an error. But that is not the case when reading from an write-only(OUT) parameter of a function. Oracle silently allows this without any error. What is the reason for this behaviour?. The following code executes without any assignment happening to "so" variable: create or replace function foo(a OUT number) return number is so number; begin so := a; --no assignment happens here a := 42; dbms_output.put_line('HiYA there'); dbms_output.put_line('VAlue:' || so); return 5; end; / declare somevar number; a number := 6; begin dbms_output.put_line('Before a:'|| a); somevar := foo(a); dbms_output.put_line('After a:' || a); end; / Here's the output I got: Before a:6 HiYA there VAlue: After a:42

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  • Object still linked (referenced) after selecting it out of list?

    - by djerry
    Hey guys, I was wondering, and i'm not really sure, but help me out here. If you have a List items, and there's one object you need to change a property of it. Say myClass has a string property "status". I'm searching my list with a for-loop and i get my object so i do myClass item = items[i]; if i want to change the "status" property, i do this for example : item.Status = "new status"; My question/issue is this: is "item" still linked to the list item, so that if i execute the line above, it will be changed in the list as well without having to set this : items[i] = item; Hope this is clear. Thanks in advance.

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  • Getting data from child controls loaded programmatically

    - by Farinha
    I've created 2 controls to manipulate a data object: 1 for viewing and another for editing. On one page I load the "view" User Control and pass data to it this way: ViewControl control = (ViewControl)LoadControl("ViewControl.ascx"); control.dataToView = dataObject; this.container.Controls.Add(control); That's all fine and inside the control I can grab that data and display it. Now I'm trying to follow a similar approach for editing. I have a different User Control for this (with some textboxes for editing) to which I pass the original data the same way I did for the view: EditControl control = (EditControl)LoadControl("EditControl.ascx"); control.dataToEdit = dataObject; this.container.Controls.Add(control); Which also works fine. The problem now is getting to this data. When the user clicks a button I need to fetch the data that was edited and do stuff with it. What's happening is that because the controls are being added programmatically, the data that the user changed doesn't seem to be accessible anywhere. Is there a solution for this? Or is this way of trying to keep things separated and possibly re-usable not possible? Thanks in advance.

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  • JSP tag lifecycle

    - by mkoryak
    i just introduced a bug into my code because i seem to have misunderstood the jsp tag lifecycle. The tag worked like this before the bug: i pass the tag some collection as an attribute, and it displays it as a table. The collection was passed into the JSP from the controller. after the bug: a removed the attribute which set the collection. instead, in the tag i check if the collection is null, and then grab it by name from the request (using a naming convention). the thing that i didnt expect: after the collection was initially set in the tag, it would never become null on subsequent executions! it was still defined as an non-requred attribute in the TLD. I expected the tag to not hold on to previous values between executions.

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  • Peer Presure Badge [closed]

    - by Lizard
    I have just been going through the bandges you can get and noticed the peer pressure badge, I can't image ever asking a serious question that would get me 3 down votes. So I figured I would simply ask for the down votes myself... Please downvote this question, thanks. Blame the competitive side of me for wanting all the badges! Thanks

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  • Constrain a table to have only one row

    - by finnw
    What's the cleanest way to constrain a SQL table to allow it to have no more than one row? This related question discusses why such a table might exist, but not how the constraint should be implemented. So far I have only found hacks involving a unique key column that is constrained to have a specific value, e.g. ALWAYS_0 TINYINT NOT NULL PRIMARY KEY DEFAULT (0) CONSTRAINT CHECK_ALWAYS_0 CHECK (ALWAYS_0 = 0). I am guessing there is probably a cleaner way to do it. The ideal solution would be portable SQL, but a solution specific to MS SQL Server or postgres would also be useful

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  • Tool to write linear temporal logic from UML 2.0 sequence diagram

    - by user326180
    i am working on checking model consistency of software. to do this i need to write linear temporal logic for UML 2.0 sequence diagram. if any body have any other tool for the same please response as soon as possible. I will be very obliged to you. i have found charmy tool have plugin for the same. Does anybody have source code for charmy tool(CHecking ARchitectural Model consistencY). It is not available on their website. Thanks in advance.

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  • How to properly handle signals when using the worker thread pattern?

    - by ipartola
    I have a simple server that looks something like this: void *run_thread(void *arg) { // Communicate via a blocking socket } int main() { // Initialization happens here... // Main event loop while (1) { new_client = accept(socket, ...); pthread_create(&thread, NULL, &run_thread, *thread_data*); pthread_detach(thread); } // Do cleanup stuff: close(socket); // Wait for existing threads to finish exit(0); ) Thus when a SIGINT or SIGTERM is received I need to break out of the main event loop to get to the clean up code. Moreover most likely the master thread is waiting on the accept() call so it's not able to check some other variable to see if it should break;. Most of the advice I found was along the lines of this: http://devcry.blogspot.com/2009/05/pthreads-and-unix-signals.html (creating a special signal handling thread to catch all the signals and do processing on those). However, it's the processing portion that I can't really wrap my head around: how can I possibly tell the main thread to return from the accept() call and check on an external variable to see if it should break;?

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  • How to make floating frames with wx.aui.AuiManager be proper windows

    - by jhaukur
    Hello all I'm using wxPython. I'm trying to figure out how I can change the behavior of the wx.aui.AuiManager so that when a window is dragged to become floating, it will become a proper window with Minimize and Maximize buttons and shown in the Taskbar. Apparently there is some subclassing done of the standard window to remove those exact features but I'm not having any luck in getting them back.

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  • Javascript delete cookie next day

    - by Clint
    Hi, I was wonder if you can delete a cookie at the beginning of the next day. Lets say I log in to a website at 1:30pm and use it again throughout the day but at midnight or 1 minute past, in the new day, the cookie is removed. Many thanks for any help, C

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  • What are potential reasons a user could be connected to a home network, but not to the internet?

    - by Matthew
    I have a friend that recently started using Ubuntu, and I've been answering his questions via the internet. However, I'm stuck on this one. He bought Linksys WPC11 wireless card, and says he was able to create a network connection, but was unable to ping or use a browser. I'm not quite sure where to start in figuring this out--what are some common causes of this sort of problem?

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  • Sort a list whit element still in first position

    - by Mercer
    Hello, i have a String list List<String> listString = new ArrayList<String>(); listString.add("faq"); listString.add("general"); listString.add("contact"); I do some processing on the list and i want to sort this list but I want general is still in first position Thx ;)

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  • gwt internationalization

    - by blub
    Hello guys, there are three (open) questions about the internationalization of GWT, I have: 1) Is it a (huge) performance issue, to use only "Messages" for constant and parameterized text (that's possible), where you would use both "Messages" and "Constants" usually? 2) Is there a way to specify the original text in the source code, whose translations can then be specified somewhere? (e.g. Translate("Hello") in the source code and than in a properties file for e.g. spanish: Hello = ¡Hola!) 3) Do you know any translation-tools, which generate the properties and interfaces for you? Thanks in Advance!

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  • Adding links to full change forms for inline items in django admin?

    - by David Eyk
    I have a standard admin change form for an object, with the usual StackedInline forms for a ForeignKey relationship. I would like to be able to link each inline item to its corresponding full-sized change form, as the inline item has inlined items of its own, and I can't nest them. I've tried everything from custom widgets to custom templates, and can't make anything work. So far, the "solutions" I've seen in the form of snippets just plain don't seem to work for inlines. I'm getting ready to try some DOM hacking with jQuery just to get it working and move on. I hope I must be missing something very simple, as this seems like such a simple task! Using Django 1.2.

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  • Can I ensure, using C#, that an X509Certificate was issued by a trusted authority?

    - by dommer
    If I use X509Certificate.CreateFromSignedFile to get the certificate used to sign a file, can I confirm that it was signed by a trusted authority - and isn't just a "self-signed" cert of some kind? I want to extract the "Subject" (company) name from the cert to ensure that an unmanaged DLL I'm using is unmolested (I can't checksum it as it's updated frequently and independently) and official. However, I'm concerned that a fake DLL could be signed with a "self-signed" cert and return the original company's name. So, I want to ensure the the cert was issued by Versign, Thwate or similar (anything installed on the cert repository on the machine will be fine). How can I do this, if at all, when using X509Certificate.CreateFromSignedFile? Or does it do this automatically (i.e. a "self-signed" cert will fail)?

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  • How to create copying items from property values?

    - by Nam Gi VU
    Let's say I have a list of sub paths such as <PropertyGroup> <subPaths>$(path1)\**\*; $(path2)\**\*; $(path3)\file3.txt; </subPaths> </PropertyGroup> I want to copy these files from folder A to folder B (surely we already have all the sub folders/files in A). What I try was: <Target Name="Replace" DependsOnTargets="Replace_Init; Replace_Copy1Path"> </Target> <Target Name="Replace_Init"> <PropertyGroup> <subPaths>$(path1)\**\*; $(path2)\**\*; $(path3)\file3.txt; </subPaths> </PropertyGroup> <ItemGroup> <subPathItems Include="$(subPathFiles.Split(';'))" /> </ItemGroup> </Target> <Target Name="Replace_Copy1Path" Outputs="%(subPathItems.Identity)"> <PropertyGroup> <src>$(folderA)\%(subPathItems.Identity)</src> <dest>$(folderB)\%(subPathItems.Identity)</dest> </PropertyGroup> <Copy SourceFiles="$(src)" DestinationFiles="$(dest)" /> </Target> But the Copy task didn't work. It doesn't translate the *** to files. What did I do wrong? Please help!

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  • Dynmically added row in TableLayout

    - by Balaji
    This is my activity class i want to add one textview to TableRow but i cannot show the textview in TableLayout. Activity import android.app.Activity; import android.graphics.Color; import android.os.Bundle; import android.view.LayoutInflater; import android.view.ViewGroup.LayoutParams; import android.widget.TableLayout; import android.widget.TableRow; import android.widget.TextView; import android.widget.LinearLayout; public class TableRunTime extends Activity { /** Called when the activity is first created. */ @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.main); TableLayout tl = (TableLayout) findViewById(R.id.arcitle_content_table); TextView txt = new TextView(this); TableRow tr = new TableRow(this); txt.setText("Book Name"); txt.setTextColor(Color.WHITE); txt.setLayoutParams(new LayoutParams(LayoutParams.FILL_PARENT, LayoutParams.WRAP_CONTENT)); tr.addView(txt); tl.addView(tr, new TableLayout.LayoutParams(LayoutParams.FILL_PARENT, LayoutParams.WRAP_CONTENT)); } } This is manifest file any one help how to show textview in TableLayout

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