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  • What is the best way to create a Singleton Webservice in PHP?

    - by ChronoFish
    Hello, We have a need to access a DB that only allows one connection at a time. This screams "singleton" to me. The catch of course is that the singleton connection will be exposed (either directly or indirectly) via a web-service (most probable a SOAP based web-service - located on a separate server from the calling app(s) ) - which means that there may be more than one app / instance attempting to connect to the singleton class. In PHP, what is the best way to create a global singleton or a web-service singleton? TIA

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  • Best programming language for teaching econometrics?

    - by TJB
    I will be teaching an econometrics course to masters students in the fall. I think it is important for them to learn programming with data as an essential applied research skill. What suggestions do you have for the programming language. I am leaning mostly towards R. What others should I consider?

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  • WPF: Notify visualParent when its children changed their size

    - by minaevs
    I have FrameworkElement, for example Grid, that has children(Cells, implemented in another control). When main Window changes size, i handle sizeChanged in Grid at first, and after that in some of its children. How can i get notify that all children sizeChanged events finished processing? Of course, i can raise other event in child sizeChanged and increase some counter, but for some reasons it is not the best decision. Can anyone recommend something? Thanks!

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  • Guidance on creating a drawing application in Silverlight

    - by Élodie Petit
    I need help on creating an application like Visio in Silverlight, of course a much more simpler one. Just dragging and dropping shapes and connecting them is enough at this time. Can someone direct me to some resources about this? Algorithms / implementations don't need to be in C# / Silverlight. It may be enough to start with the logic behind such an application. Thanks.

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  • showing .tif images in matlab

    - by sepideh
    I am trying to show a .tif image in matlab and I use these two line of codes a = imread('C:\Users\sepideh\Desktop\21_15.tif'); imshow(a) that encounters this warning Warning: Image is too big to fit on screen; displaying at 3% In imuitools\private\initSize at 73 In imshow at 262 what is the cause of this warning and what can I do to fix that? the main trouble is it sometimes doesn't show the image and of course even if it shows the image CPU usage gets high that I can't zoom properly

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  • Web UI for inputting a function from the reals to the reals, such as a probability distribution.

    - by dreeves
    I would like a web interface for a user to describe a one-dimensional real-valued function. I'm imagining the user being presented with a blank pair of axes and they can click anywhere to create points that are thick and draggable. Double-clicking a point, let's say, makes it disappear. The actual function should be shown in real time as an interpolation of the user-supplied points. Here's what this looks like implemented in Mathematica (though of course I'm looking for something in javascript):

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  • Shall I bother with QT?

    - by smallb
    Guys I study C++ for a second year. Till now I was doing only console app but I think it's a time to start programming in Windows. There are few alternatives and Qt is one of them but I'm also drawn towards pure Windows API - for more power of course. What would you suggest?

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  • GdkEventKey. Key value question

    - by spajak
    Hi How to translate GdkEventKey.keyval with level 0 to key value with level == 0? For example: GDK_ISO_Left_Tab ==> GDK_Tab? Of course not using switch/case for every key. I need to get particular key, not a character.

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  • How can I install an application on iPhone automatically?

    - by D33pN16h7
    Hello, I need a way to install a distribuible application without user intervention, of course I currently have a distribution profile installed on my device (I can install or uninstall the application by means of iTunes or iPCU), the problem remain on the side of automation "no user intervention is required", basically I need to develop a software (maybe hack iTunesMobileDevice.dll) that install the application when a valid device (the one with a valid distribution profile) is connected to one machine (application server), so any ideas??.... Thanks in advance!

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  • Javascript + HTML5 localstorage

    - by Alai
    So I'm searching for a good crash course on localstorage and interacting with it in Javascript. I want to build a to-do list webapp with some extra functionality but it would be just for 1 user. I don't want to mess with php/mysql and have the server doing anything. Links to tutorials would be best :-D

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  • Foreign keys and NULL in mySQL

    - by Industrial
    Hi everyone, Can I have a column in my values table (value) referenced as a foreign key to knownValues table, and let it be NULL whenever needed, like in the example: Table: values product type value freevalue 0 1 NULL 100 1 2 NULL 25 3 3 1 NULL Table: types id name prefix 0 length cm 1 weight kg 2 fruit NULL Table: knownValues id Type name 0 2 banana Note: The types in the table values & knownValues are of course referenced into the types table. Thanks!

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  • When using emacs do you rebind caps-lock to CTRL?

    - by Wayne Werner
    This question is, as indicated, for those who use Emacs. When you do, do you rebind the caps-lock key to CTRL, or do you use the "normal" ctrl key? I've recently learned some Emacs commands and was using the Visual Studio 2008 emacs commands for a while, and of course I used a caps-rebind tool, but I'm curious how many other people do. On a side note, the emacs bindings for VS are severely incomplete :(

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  • How to search and replace an unprintable character

    - by krzyk
    I've a file that was exported from Word and it replaced all quotes with strange unicode characters which aren't correctly displayed in vim. So now I want those characters to be replaced with quotes, but I don't know how to enter this character in :%s/???/'/g The characters look like this: ~U ~R. But of course I can't just mark them with mouse and paste in the command.

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  • How do you label output variables in an IDL FOR loop for further processing outside the loop in the same program?

    - by user610769
    I have a FOR loop like this: FOR k = 1,216 DO atom = G[,0::(215+k)] END What I would like to be able to do is to store in memory the array for each atom, say, atom_k and then call these different variables to perform further operations outside the FOR loop. Conceptually, I want to label the "atom" variable with the "k" counter somewhat like this: FOR k = 1,216 DO atom(k) = G[,0::(215+k)] END Of course, this doesn't work because "k" is no longer a label in this case. Does anyone know?

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  • How can I encrypt a querystring in asp.net?

    - by Dave Haynes
    I need to encrypt and decrypt a querystring in ASP.NET. The querystring might look something like this: http://www.mysite.com/report.aspx?id=12345&year=2008 How do I go about encrypting the entire querystring so that it looks something like the following? http://www.mysite.com/report.aspx?crypt=asldjfaf32as98df8a And then, of course, how to I decrypt it? What's the best encryption to use for something like this? TripleDES?

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  • How do i provide a custom session ID getter/setter in asp.net

    - by Monsters
    I want to pass the sessionID as a json parameter, I can see how to override SessionIDManager and such, but this just covers custom creation/validation of sessionID's as opposed to where it actually gets the sessionID from. There is of course 'cookieless' which puts it in the url, but that doesn't work for me either. So i'd like to override the session handling so I can specify where it should look for the sessionID.

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  • LINQ - joining multiple lists

    - by kristian
    I've looked at the 101 Linq Samples here but I can't see anything like this in that list. If I'm just not seeing a relevant example there, please link to it. If I have these 3 classes: class Student { int id; string name } class Course { int id, string name } class Enrolment { int studentId; int courseId; } How would I use LINQ to get a list of courses a student is enrolled on? (assume I have an IList of all three classes)

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  • OpenGL: How to clear only a part of the screen?

    - by Newbie
    Is it possible to not clear entire screen when using glClear() function? I need to clear only a part of the screen to save some rendering time, otherwise i would have to redraw half of the screen every frame, even if nothing is happening on the other half. Of course this should be done as quickly (or quickier) as the glClear() is now.

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  • What is a "context bound" in Scala?

    - by Jesper
    One of the new features of Scala 2.8 are context bounds. What is a context bound and where is it useful? Of course I searched first (and found for example this) but I couldn't find any really clear and detailed information.

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