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  • How do CUDA devices handle immediate operands?

    - by Jack Lloyd
    Compiling CUDA code with immediate (integer) operands, are they held in the instruction stream, or are they placed into memory? Specifically I'm thinking about 24 or 32 bit unsigned integer operands. I haven't been able to find information about this in any of the CUDA documentation I've examined so far. So references to any documents on specific uarch details like this would be perfect, as I don't currently have a good model for how CUDA works at this level.

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  • Image Steganography

    - by Sridhar
    Hi, I'm working on Steganography application. I need to hide a message inside an image file and secure it with a password, with not much difference in the file size. I am using Least Significant Bit algorithm and could do it successfully with BMP files but it does not work with JPEG, PNG or TIFF files. Does this algorithm work with these files at all? Is there a better way to achieve this? Thanks.

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  • What is the best schema design for child collection with a "primary" entity

    - by erg39
    Here is the scenario: You have a Persons table with a one-to-many relationship with an Addresses table, where one of the Address rows is the "primary" Address. Is it better in a normalized schema to Use a Persons.PrimaryAddressID to access the "primary" Address for a Person or Use an Addresses.IsPrimary bit column to reference the "primary" Address for a Person via Addresses.PersonID or Other and why?

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  • SQL 2005 Merge / concatenate multiple rows to one column

    - by Dave
    Hi, We have a bit of a SQL quandry. Say I have a results that look like this... 61E77D90-D53D-4E2E-A09E-9D6F012EB59C | A 61E77D90-D53D-4E2E-A09E-9D6F012EB59C | B 61E77D90-D53D-4E2E-A09E-9D6F012EB59C | C 61E77D90-D53D-4E2E-A09E-9D6F012EB59C | D 7ce953ca-a55b-4c55-a52c-9d6f012ea903 | E 7ce953ca-a55b-4c55-a52c-9d6f012ea903 | F is there a way I can group these results within SQL to return as 61E77D90-D53D-4E2E-A09E-9D6F012EB59C | A B C D 7ce953ca-a55b-4c55-a52c-9d6f012ea903 | E F Any ideas people? Many thanks Dave

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  • Rails 2.3: How to create this SQL into a named_scope

    - by randombits
    Having a bit of difficulty figuring out how to create a named_scope from this SQL query: select * from foo where id NOT IN (select foo_id from bar) AND foo.category = ? ORDER BY RAND() LIMIT 1; Category should be variable to change. What's the most efficient way the named_scope can be written for the problem above?

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  • Using inheritance in PostgreSQL

    - by Anton Prokofiev
    Hello, All! Is somebody have an experience using inheritance in PostgreSQL? Is it worth to use it, or better to keep hands of :)? In which situation you would use it? To be true I'm a little bit in doubt about mixing relational and OO models...

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  • Good way to make changes to production database / source code

    - by This is it
    Hi I'm interested to find out what would be the good way to make changes to production database and source code in web application (ASP.NET, SQL Server 2008). A little bit more details, we develop on local machines, and then we need to transfer the code and database changes to production (pretty much standard story). At the moment we do it in the evening, change the database directly from management studio on production server, and then just overwrite the existing asp.net code (copy/past). Thanks

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  • Efective way to avoid integer overflow when multiplying?

    - by Jonathan
    Hi, I'm working on a hash function which gets a string as input. Right now I'm doing a loop and inside the hash (an int variable) is being multiplied by a value and then the ASCII code for the current character is added to the mix. hash = hash * seed + string[i] But sometimes, if the string is big enough there is an integer overflow there, what can I do to avoid it while maintaining the same hash structure? Maybe a bit operation included inside the loop?

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  • Easy way to convert a string of 0's and 1's into a character? Plain C

    - by Nick
    I'm doing a steganography project where I read in bytes from a ppm file and add the least significant bit to an array. So once 8 bytes are read in, I would have 8 bits in my array, which should equal some character in a hidden message. Is there an easy way to convert an array of 0's and 1's into an ascii value? For example, the array: char bits[] = "0,1,1,1,0,1,0,0" would equal 't'. Plain C

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  • Getting the Assembly Qualified Name of a class in Visual Studio

    - by Alex Marshall
    Hello, I'm writing a customized reflective library for some specialized custom domain logic, and that library is going to use XML configuration files that will dynamically resolve System.Type objects at runtime. However, when writing the XML configuration files, it's a bit of a pain to write the types because they need to be fully qualified assembly names for Type.GetType() to resolve them. Is there a way to find out the AssemblyQualifiedName of an object in Visual Studio without resorting to writing a program to print them out to a file or standard out or anything like that ?

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  • Split a complex GUI window into several files in Netbeans

    - by Hectoret
    After building the application GUI, I realised it was a little bit too complex and I could reuse some of the Swing components. The result is a complex class with many anidated JPanels. My question is: does Netbeans provide a way to split a JPanel and its children components into a different class? If I do it by hand, will the GUI designer still work? Thanks!

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  • Is it worth investing time in learning low level Java?

    - by Kevin Rave
    Low level Java, I mean, bits, bytes, bit masking, GC internals, JVM stuff, etc in the following contexts: - When you are building an enterprise app using frameworks like Spring, Hybernate, etc. - Interviews for a Sr Java Developer position where you are expected work on a existing Enterprise App that was built using some frameworks (Spring, EJB, Hybernate,etc) - Architects (Java) I understand knowing the very low level is "good". But how often do you think / use of these in the real-world, unless you are developing something from the ground-up keeping performance in mind?

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  • powershell.exe tab completion - list alternatives?

    - by J Cooper
    I've never really used PowerShell before, and playing with it a bit, it looks like it uses cmd.exe's style of tab completion (fill in the first likely candidate, and then you can use tab to cycle through other alternatives). I'd much prefer the way e.g. bash works, where if there are multiple candidates, it shows a list of them. Is there an easy way to turn this on, by any chance?

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  • Scripty2 : how to close dialog

    - by nicolas_o
    Heya, I am looking for a way to close a scripty2 dialog like this : http://mir.aculo.us/stuff/scripty2-ui/test/functional/controls_dialog.html From outside of the dialog (i.e. with firebug command line) but my javascript mojo is a bit limited and after 30 min of going around the DOM I cannot find a way. Any hints ? NB : scripty2 is a rewrite of script.aculo.us which uses bits of Jquery UI.

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  • database text field databound to a checkbox

    - by Patrick
    I'd like the field to save as a 1 or 0 instead of 'True' or 'False' in the database and i cannot figure out how to do it without manually setting every property when the record is saved. I have to use this a lot in this project and a bit field is not an option. I would like to solve this issue by extending the CheckBox control if possible but i don't know how to change the binding fields value. Any help would be greatly appreciated!

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  • how to describe this series in code?

    - by clamp
    hello, i would like to find a forumla describing this series. i need to set a boolean depending on a positive integer. it's pretty simple but i am stuck and feel a bit stupid. 0 false 1 true 2 true 3 false 4 false 5 true 6 true 7 false 8 false ...

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  • Scalability of Ruby on Rails versus PHP

    - by Daniel
    Can anyone comment on which is more scalable between RoR and PHP? I have heard that RoR is less scalable than PHP since RoR has a little more overhead with its MVC framework while PHP is more low level and lighter. This is a bit vague - can anyone explain better?

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  • Android InAppBilling - what to do when user presses the buy button?

    - by GeekedOut
    I set up the "Dungeons" InAppBilling example locally and I am ready to try it out, but I am a bit confused. I have a button like this: Button donate = (Button)findViewById(R.id.donate); donate.setOnClickListener(new Button.OnClickListener() { public void onClick(View v) { // But what do I do here? :) } }); And when it is called, what do I need to do to actually go to the pay screen on android store? Thanks!

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  • CSS: Stopping div pushing content

    - by Melt
    Hi all, I'm trying to implement a CSS menu and am having a problem with the menu pushing the other content/divs down when the menu expands. http://bit.ly/bAcS56 Can anyone tell me what CSS I need to stop the main body content being pushed when the menu expands? Thanks

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