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  • Undo/Redo using Memento: Stack, Queue or just LinkedList?

    - by serhio
    What is the best having when implementing Memento pattern (for Undo/Redo) in witch collection to Keep Mementos? Basically, I need this(c = change, u = undo, r = redo): 0 *c -1 0 *c -2 -1 0 *c -3 -2 -1 0 <u -2 -1 0 1 *c -3 -2 -1 0 Variants: LinkedList - possible in principle, maybe not optimized. Queue - not adapted for this task, IMO. Stack - not adapted for undo AND redo; Double Stack - maybe optimal, but can't control the undo maximum size.

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  • What is the point of a constant in C#

    - by Adam
    Can anyone tell what is the point of a constant in C#? For example, what is the advantage of doing cosnt int months = 12; as opposed to int months = 12; I get that constants can't be changed, but then why not just... not change it's value after you initialize it?

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  • MVC + Nhibernate + Oracle Schema Configuration

    - by Orkun Balkanci
    Our customer wants us to use a connectionstring with username = "external" and add schemaName "original" infront of our queries like: "select columnA from original.TableA" I dont want to change mapping files which are shared by other projects, tried adding default schema as: <property name="default_schema">original</property> But this doesn't work. Any Help?

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  • are push notification tokens unique across all apps for a single device?

    - by scootklein
    i will have multiple applications on the app store and 1 urban airship account to send push notifications to all of these devices. what i want to know is if each apple device has the same "push token" across all applications? this is more of a database architecture thing so that I don't duplicate a push token many times if one single device uses many of my apps if each apple device generates a unique push token for each application it has installed my architecture needs to change.

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  • In MS Access form, how to color background of selected record?

    - by PowerUser
    I have a somewhat complicated looking Access Form with a continuous display (meaning multiple records are shown at once). I'd like to change the background color of the selected record only so the end-user can easily tell which record they are on. I'm thinking of perhaps a conditional format or maybe something like this: Private Sub Detail_HasFocus() Detail.BackColor(me.color)=vbBlue End Sub and something similar for when that row loses focus. This code snippet obviously won't work, but it's the kind of code I'd like to achieve.

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  • chdir programmatically

    - by james owen
    Friday, March 12, 2010 1:18 pm. In windows -- and probably unix for that matter -- using the chdir() function in a (32-bit) program doesn't change the directory when the program exits. (It does in a 16-bit windows program.) Does anybody know how to do that in a windows 32-bit program?

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  • How to reload ASP 1.0 page with additional parameter

    - by Amadeus45
    Hi, I'm a beginner of ASP. I'm maintaining at ASP 1.0 page and I want to reload the page with an additional parameter when user click client-side URL. The objective is to export the table currently display in Excel. So I want to reload the page with a special parameter that would tell the page to change the ResponseType to be Excel data. Any idea ? Thanks

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  • How to distort the desktop screen

    - by HaifengWang
    Hi friends, I want to change the shape of the desktop screen, so what are displayed on the desktop will be distorted at the same time. And the user can still operate the PC with the mouse on the distorted desktop(Run the applications, Open the "My Computer" and so on). I think I must get the projection matrix of the screen coordinate at first. Then transform the matrix, and map the desktop buffer image to the distorted mesh. Are there any interfaces which can modify the shape of the desktop screen in OpenGL or DirectX? Would you please give me some tip on it. Thank you very much in advance. Please refer to the picture from http://oi53.tinypic.com/bhewdx.jpg BR, Haifeng Addition1: I'm sorry! Maybe I didn't express clearly what I want to implement. What I want to implement is to modify the shape of the screen. So we can distort the shapes of all the applications which are run on Windows at the same time. For example that the window of "My Computer" will be distorted with the distortion of the desktop screen. And we can still operate the PC with mouse from the distorted desktop(Click the shortcut to run a program). Addition2: The projection matrix is just my assume. There isn't any desktop projection matrix by which the desktop surface is projected to the screen. What I want to implement is to change the shape of the desktop, as the same with mapping the desktop to an 3D mesh. But the user can still operate the OS on the distorted desktop(Click the shortcut to run a program, open the ie to surf the internet). Addition3: The shapes of all the programs run on the OS are changed with the distortion of the screen. It's realtime. The user can still operate the OS on the distorted screen as usually. Maybe we can intercept or override the GPU itself to implement the effect. I'm investigating GDI, I think I can find some clue for that. The first step is to find how to show the desktop on the screen.

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  • Deploying patches and new versions.

    - by 0plus1
    I'm deveoping a big project, I have the dev folder (connected to a specific subdomain) then the "real" folder, the live one. When I'm ready to push patches or whole new versions I'm currently copying the files individually, is there a program that can help me do this task? Keep in mind that some files (the config one and the htacess) must never change in the live version. Thank you

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  • HttpWebRequest.UserAgent : What does it do

    - by BDotA
    I read this MSDN like about it and ran its example. when I change the uSerAgnet to something like "blah", the output is wrong but when I use the same thing that is in the example of even when I comment out the line of code that is setting the UserASgent, the output is correct. what is UserAgent at all ? when should I set it ? How to know to what value should I set it ? thanks

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  • Regex to get value of URL parameter?

    - by stef
    In a url like the one below, I'd like to get the value of ProdId. The URL format will always be consistent, as will the parameter name, but the length of the value may change. It will always be numeric. http://www.site.com/page.php?ProdId=2683322&xpage=2 Using PHP what's the fastest way to get it (I'll be processing 10,000's so speed is an issue) ?

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  • Rolling back a transaction in a Grails Service

    - by UltraVi01
    I have been updating all my services to be transactional by using Grail's ability to rollback when a RuntimeException is thrown in the service. I have, in most cases, doing this: def domain = new Domain(field: field) if (!domain.save()) { throw new RuntimeException() } Anyways, I wanted to verify that this indeed will rollback the transaction... it got me thinking as to whether at this point it's already been committed.. Also, if not, would setting flush:true change that? I am not very familiar with how Spring/Hibernate does all of this :)

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  • Receiving the post response using curl

    - by Larry Battle
    Hello, I'm trying to make a script that will download search results from a HTTPS website using POST. So far, I'm able to download the web page before the submission but not the response page containing the search results. The problem seems to be that curl isn't waiting long enough for the response page to appear. The website behaviors likes this. Website appears- input form data - click submit - progressing icon appears - returns new web page with search results( new data but the url doesn't change ) My code: curl -d "postData" -k url

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  • Do not fire 'zoom_changed' event when calling fitBounds function on map

    - by Encore PTL
    Is there a way to prevent the zoom_change event from being triggered if it occurs due to fitBounds() ? I am having an issue where I need to do a search on the server from client when there is a zoom change to map but every time I call fitBounds() it causes zoom_change to trigger which causes the client to do another search on the server. I am only interested in zoom_change done by users and not programmatically using fitBounds.

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  • Discrete problem of probability theory [closed]

    - by calejero
    A jury consists of 12 persons each of which has, before the trial started, a probability of 0.4 to vote in favor of the defendant's innocence. During the trial, the lawyer has a probability of 0.6 to change the mind of each juror who was biased against the accused. How likely is the defendant to be acquitted if he needs 10 votes in favor?

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