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  • GDB disas question about address values

    - by user324994
    I'm working with a binary file that I disas'd in gdb. Right now I'm just examining the return value of a function. 0x08048604 <playGame+78>: ret Is the address shown the address where ret is stored in the function? Or is it just the address of the instruction to return the ret value?

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  • R segfault when running via Rpy on linux

    - by Zhang18
    I'm running R via Rpy on a redhat linux distribution. Periodically I'll encounter this error message: *** caught segfault *** address (nil), cause 'unknown' And the entire program dies right there. It usually occurs when I run a lot of regression r.lm(). But by simply running the identical code again, the problem may or may not go away (so not always reproduceable). Does anyone know what might be causing this, and/or how I can prevent it from happening?

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  • CSS: Why do the border gets like this?

    - by Azzyh
    why does the border get like this, i want it around the videoclip, if i use float it do the border correctly, if i use position, then it gets like that, and i dont want to use float. #clip{ position: relative; right: 1px; border: 2px solid #FF3399; }

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  • VS2010 Database Compare. How do you create a *.DBSchema extensioned file?

    - by George
    I'd like to take a snapshot of my database, make some changes and then use the db compare functionality to identify the changes, and who knows, maybe even generate scripts to make the change. I'd like to avoid having to backup the current db and restore it as a separate db just to have a "before" snapshot. I'm guessing I shouldn't have to. Obsviously, I'm clueless about db projects and am looking to be pointed in the right direction. ty!

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  • How can I take any function as input for my Scala wrapper method?

    - by pr1001
    Let's say I want to make a little wrapper along the lines of: def wrapper(f: (Any) => Any): Any = { println("Executing now") val res = f println("Execution finished") res } wrapper { println("2") } Does this make sense? My wrapper method is obviously wrong, but I think the spirit of what I want to do is possible. Am I right in thinking so? If so, what's the solution? Thanks!

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  • Selecte and retrieve file path to image using dialog box

    - by Steven
    I'm expanding Wordpress to function more like a CMS. This includes relating image to a post. Currently I have a text field where I paste an image path. Now I want to click a button which opens a dialog box, then I navigate to the right folder and select a file to "open" (from server side). The file path is returned. How can I go about accomplishing this?

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  • Help me to find a better approach-Design Pattern

    - by DJay
    I am working on an ASP.Net web application in which several WCF services are being used. At client level, I am creating channel factory mechanism to invoke service operations. Right now, I have created an assembly having classes used for channel factory creation code for every service. As per my assumption this is some sort of facade pattern. Please help me to find a better approach or any design pattern, which I can use here.

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  • Rails model without database

    - by FlipFlop
    I want to create a Rails (2.1 and 2.2) model with ActiveRecord validations, but without a database table. What is the most widely used approach? I've found some plugins that claim to offer this functionality, but many of them don't appear to be widely used or maintained. What does the community recommend I do? Right now I am leaning toward coming up with my own solution based on this blog post.

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  • database transaction rollback processing in PHP

    - by user198729
    try { $con->beginTransaction(); $this->doSave($con); $con->commit(); } catch (Exception $e) { $con->rollBack(); throw $e; } The code above is quite standard an approach to deal with transactions, but my question is:what if $con->rollBack() also fails? It may cause db lock,right?If so,what's the perfect way to go?

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  • can i perform xml operations in XMLLITE with the same features of MSXML?

    - by Rajakumar
    Hi , I know something about MSXML parser ,to create an xml with native code ..Msxml depends COM..So I want to create xml without com and dom ,so i wish to choose XMLLITE..but i dont know full details about xmllite ,when i was read the xmllite documentation in msdn ,i gathered some points ,they will provide only 2 things (IXMLReader & IxmlWriter).Here in msxml ,i had many functions to do xml operations ,such as selectsinglenode,appendchild ..Now can i perform the same things with XMLLITE?..please give me the right choice towards this ...

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  • Detecting html textarea's change

    - by Colby77
    Hi, I'd like to monitor my textarea's changes with jQuery. I can do this with the keyup event and it works perfectly. But what event I can get when a user click on the textarea (right mouse click), then choose paste? Click event occur only when the user click with the left mouse button on the textarea. How can I handle this situation?

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  • Using json_encode on objects in PHP

    - by Alan
    Hi, I'm trying to output lists of objects as json and would like to know if there's a way to make objects usable to json_encode? The code I've got looks something like $related = $user->getRelatedUsers(); echo json_encode($related); Right now, I'm just iterating through the array of users and individually exporting them into arrays for json_encode to turn into usable json for me. I've already tried making the objects iterable, but json_encode just seems to skip them anyway.

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  • Visual Studio Colour Settings

    - by Ian
    I've got a custom colour set in Visual Studio and one of the colours when debugging is making things a bit of a misery. Unfortunately I can't figure out which one it is, and when going through and changing all the light background ones, it still remains. Can anyone point me in the right direction? In this screenshot the current line is yellow, and the caller is the white/cream sort of colour which is the one I want to change... Thanks very much! :)

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  • Enumerate printers on a Mac

    - by Kirk Backus
    So, I'm familiar how to enumerate the printers using the Windows API, there are a ton of examples out there. What I gathered from here is that I can find the printers in the /Library/Printers/ directory. When I searched there, I found more folders which didn't really mean anything to me. To keep it simple, how do I query the mac to get a list of printers (local and networked) "attached" to the system? Or can anyone point me in the right direction?

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  • Change encoding to UTF-8 recursively on Windows?

    - by Pekka
    Does anybody know a tool, preferably for the Explorer context menu, to recursively change the encoding of files in a project from / to UTF-8 and other encodings? Freeware or not too expensive would be great. Edit: Thanks for the answers, +1 for all of them as they are all fine but I am a lazy bastard sometimes, and would really like to be able to just right click a folder and say "convert all .php files to UTF-8". :) Further suggestions are appreciated.

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  • What is the best way to debug OpenGL?

    - by dreamlax
    I find that a lot of the time, OpenGL will show you it failed by not drawing anything. I'm trying to find ways to debug OpenGL programs, by inspecting the transformation matrix stack and so on. What is the best way to debug OpenGL? If the code looks and feels like the vertices are in the right place, how can you be sure they are?

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  • Which one has a faster runtime performance: WPF or Winforms?

    - by Joan Venge
    I know WPF is more complex an flexible so could be thought to do more calculations. But since the rendering is done on the GPU, wouldn't it be faster than Winforms for the same application (functionally and visually)? I mean when you are not running any games or heavy 3d rendering, the GPU isn't doing heavy work, right? Whereas the CPU is always busy. Is this a valid assumption or is the GPU utilization of WPF a very minor operation in its pipeline?

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  • Missing Test Settings template in VS2010 Ultimate

    - by JustLoren
    I'm attempting to add a Test Settings file to my Unit Tests project in VS2010. All websites seem to simply say "Go to Add New Item Installed Templates Test Settings". However, I don't have Test Settings as an option in my Installed Templates (nor does searching for them online turn up any results). Can someone point me in the right direction for what I need to do?

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  • What is the best approach of creating a login System?

    - by Starx
    I am always wondering that the login systems I have created is vulnerable to attacks or not. As many other programmers I also use sessions to hold a specific token token to know the login status. Cookies to hold the username or even sometime saved status. What I am wondering is, Is this the right way? Is there any approach better that this?

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  • Big Oh Notation - formal definition.

    - by aloh
    I'm reading a textbook right now for my Java III class. We're reading about Big-Oh and I'm a little confused by its formal definition. Formal Definition: "A function f(n) is of order at most g(n) - that is, f(n) = O(g(n)) - if a positive real number c and positive integer N exist such that f(n) <= c g(n) for all n = N. That is, c g(n) is an upper bound on f(n) when n is sufficiently large." Ok, that makes sense. But hold on, keep reading...the book gave me this example: "In segment 9.14, we said that an algorithm that uses 5n + 3 operations is O(n). We now can show that 5n + 3 = O(n) by using the formal definition of Big Oh. When n = 3, 5n + 3 <= 5n + n = 6n. Thus, if we let f(n) = 5n + 3, g(n) = n, c = 6, N = 3, we have shown that f(n) <= 6 g(n) for n = 3, or 5n + 3 = O(n). That is, if an algorithm requires time directly proportional to 5n + 3, it is O(n)." Ok, this kind of makes sense to me. They're saying that if n = 3 or greater, 5n + 3 takes less time than if n was less than 3 - thus 5n + n = 6n - right? Makes sense, since if n was 2, 5n + 3 = 13 while 6n = 12 but when n is 3 or greater 5n + 3 will always be less than or equal to 6n. Here's where I get confused. They give me another example: Example 2: "Let's show that 4n^2 + 50n - 10 = O(n^2). It is easy to see that: 4n^2 + 50n - 10 <= 4n^2 + 50n for any n. Since 50n <= 50n^2 for n = 50, 4n^2 + 50n - 10 <= 4n^2 + 50n^2 = 54n^2 for n = 50. Thus, with c = 54 and N = 50, we have shown that 4n^2 + 50n - 10 = O(n^2)." This statement doesn't make sense: 50n <= 50n^2 for n = 50. Isn't any n going to make the 50n less than 50n^2? Not just greater than or equal to 50? Why did they even mention that 50n <= 50n^2? What does that have to do with the problem? Also, 4n^2 + 50n - 10 <= 4n^2 + 50n^2 = 54n^2 for n = 50 is going to be true no matter what n is. And how in the world does picking numbers show that f(n) = O(g(n))? Please help me understand! :(

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  • Changing hibernate batch size programatically

    - by user179056
    Hello, Is possible to change hibernate.jdbc.batch_size programmatically? I understand hibernate.jdbc.batch_size is a application level parameter, wanted to know if i can use it specifically for certain HQL inserts and not others. I would change the code only for those HQL inserts The big picture is that i need to introduce batch inserts to make the web application performant in some scenarios, but i do not want to jeopardize the normal inserts which work right now. Any pointers would help thanks Sameer

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