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  • Are there any lightweight analogues to CORBA/RPC for embedded programs?

    - by Mtr
    I am writing embedded applications for different hardware (avr, arm7, tms55xx…) and different rtoses (freeRTOS, rtx, dsp/bios). And every second of them needs to communicate with PC or another digital device. Sometimes interactions logic is very advanced. So I'm interesting in common methodology (like state-machine programming style), protocol specification or library, that could simplify developing such things.

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  • Rails - How do you dynamically call the request methods "get put destroy etc" at runtime in tests

    - by adam
    I'm always writing tests to check my controller restricts people from certain actions depending on their status i.e. logged in, admin? etc Regardless of whether its a get to :index or a puts to :create the code is always the same. I'm trying to refactor this so that i have one method such as should_redirect_unauthenticated_to_login_action(request, action) and call it like so should_redirect_unauthenticated_to_login_action(:get, :index) = get :index But not sure how to dynamically call the various response methods rails provides for functional tests which seem to live in the module ActionController I mucked around with module = Kernel.const_get("ActionController") module::TestProcess.get NoMethodError: undefined method `get' for ActionController::TestProcess:Module can anyone help (im very new to dynamic calling in ruby)

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  • Understanding Scope on Scala's For Loops (For Comprehension)

    - by T. Stone
    In Chapter 3 of Programming Scala, the author gives two examples of for loops / for comprehensions, but switches between using ()'s and {}'s. Why is this the case, as these inherently look like they're doing the same thing? Is there a reason breed <- dogBreeds is on the 2nd line in example #2? // #1 ()'s for (breed <- dogBreeds if breed.contains("Terrier"); if !breed.startsWith("Yorkshire") ) println(breed) // #2 {}'s for { breed <- dogBreeds upcasedBreed = breed.toUpperCase() } println(upcasedBreed)

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  • What's the best CDN for image hosting on a high-volume web site?

    - by Mike
    Akamai is way too expensive. Photobucket is not reliable. Is there a great content delivery network that I can use just to host my images? We deploy images programmatically via FTP, so there is some programming behind the scenes. Having some sort of reporting about the reliability of the service, whether it's raw logs files or a web-based admin screen that shows http errors, would also be important. Has anyone worked with edgecast?

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  • Which IDE / code editor was the first to introduce a code completion feature?

    - by Uri
    I am trying to identify the point in time where code completion (autocomplete/intellisense/whatever) was first introduced in IDEs and would appreciate any pointers. By code completion here I mean a feature within the editor that offers methods or suggestions based on the code that was already typed, and I am interested in programming language related completions (not word processor style completion).

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  • Which is the 'correct' way to do this (if statement)

    - by frinkz
    I've got plenty of these lying around, and I'm wondering if I'm going to face any trouble - or performance problems. I have method A: MyClass monkey; ... if(monkey != null) { ... } Or method B: boolean hasMonkey; //This is set to TRUE when monkey is not null MyClass monkey; ... if(hasMonkey) { ... } On a functional level, they both do the same thing. Right now, I'm using method A. Is that a bad way of doing things? Which is going to perform better?

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  • In which document do file specifications belong?

    - by Andrew
    In which document would a file specification belong? Perhaps this file is used as an input to a third-party system. Would it belong in its own document? Or would it be better to put it in the functional or design spec? Or somewhere else? When I say file specification, I mean a description of what format the file is (CSV, fixed width, etc), columns, data types, etc. Also, where should you document how the file is generated? i.e. business rules/algorithms which are used to generate the file.

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  • How to generate JPA 2.0 metamodel?

    - by yamsha
    In the spirit of type safety associated with the CriteriaQuery JPA 2.0 also has an API to support Metamodel representation of entities. Is anyone aware of a fully functional implementation of this API (to generate the Metamodel... as opposed to creating the metamodel classes manually)? It would be awesome if someone also knows the steps for setting this up in Eclipse (I assume it's as simple as setting up an annotation processor, but you never know). EDIT: Just stumbled across Hibernate JPA 2 Metamodel Generator . But the issue remains since I can't find any download links for the jar

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  • Applications of concurrent queues and stacks in .NET 4

    - by Jon Harrop
    .NET 4 includes new concurrent data structures. The Bag and Dictionary collections have obvious applications but I cannot see any use for the Queue and Stack data structures. What are people using these for? Also, I've noticed that the design based upon linked lists incurs a lot of allocation and that destroys scalability. This is surprising given that the sole purpose of these collections is multicore programming. Is this an inherent limitation or are they just badly implemented?

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  • PRINTER SET UP IN EXCEL VISUAL BASIC

    - by Gina
    I am trying to assign a cell in excel for the user to type the printer name where they want the print out to go and then use that value in the Application.ActivePrinter = (use the cell value) Even though I have done the programming assigning a name to the cell and using it in a variable it is giving me an error. I have set my variable as string, text, object and variant already and it's not working. Do you know what code should I use to be able to do this?

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  • How i can i use the value of a variable from one class in another in objective c?

    - by user337174
    Hi i am fairly new to objective c and have been doing some iphone programming. Is it possible to look up the value of a variable in a different class? Basically what i am doing is running a function that exists in my app delegate from a view controller, but the app delegate needs to use a variable stored in the view controller from which the app delegate function was called. Make sense??? Any help would be grateful. James

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  • Win32 WndProc Name: why can't I change its name ?

    - by asksuperuser
    I have compiled a simple win32 app successfully with bc++ (2 lines excerpt only): LRESULT CALLBACK WindowProcedure (HWND, UINT, WPARAM, LPARAM); wincl.lpfnWndProc = WindowProcedure; Why can't I rename WindowProcedure and compile this: LRESULT CALLBACK WndProc (HWND, UINT, WPARAM, LPARAM); wincl.lpfnWndProc = WndProc; as error message gives: Turbo Incremental Link 5.00 Copyright (c) 1997, 2000 Borland Error: Unresolved external 'stdcall WndProc(HWND *, unsigned int, unsigned int, long)' referenced from C:\PROGRAMMING\SALLY\WIN32TUTORIAL\MAIN.OBJ

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  • Revision, Quadratic Time

    - by stan
    I am not sure if you can post revision programming questions in here but i am stuck with some algorithms revision If an algorithm is quadratic it takes time proportional to the number of n^2 ? So if the slides say its almost 1/2 the square of n records is this the same as saying (n^2 * 0.5) Thanks

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  • How to get and modify a property value through a custom Attribute?

    - by David G
    I want to create a custom attribute that can be used on a property like: [TrimInputString] public string FirstName { get; set; } that will be functional equivalent of private string _firstName public string FirstName { set { _firstName = value.Trim(); } get { return _firstName; } } So basically every time property is set the value will be trimmed. How do I get the value parsed, modify that value and then set the property with the new value all from within the attribute? [AttributeUsage(AttributeTargets.Property)] public class TrimInputAttribute : Attribute { public TrimInputAttribute() { //not sure how to get and modify the property here } }

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  • Good book for Flex 4?

    - by John Isaacks
    I read the O'Really Book: Programming Flex 3 and I thought it was awesome. I am now migrating to Flex 4 and wanted to read a great book for Flex 4. There are many Flex 4 books out there and I really just want to read 1 to get me up and running fast. So if anyone can share/recommend some books that would be great!

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  • Why so many ASP.NET programmers play with Ruby on Rails after working hours?

    - by ITmeze
    I saw that on so many blogs. Lots of the people that were dealing with ASP.NET tend to play with Ruby on Rails after working hours. And It is just a matter of last one or two years. Why is it like that? Is it because when ASP.NET MVC showed up people become more open-minded - having joy with programming again they realize that some other folks had that many years ago, and they do not want to miss what they currently have?

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  • What is this weird script I found on facebook?

    - by Mike Turley
    Not so much a question to help my own programming, but I found this page on facebook with a cool illusion and a page that says "to see the real illusion, copy and paste this code into your address bar" and there is a script: http://pastebin.com/LQUVQ8hm What the hell is this? What would happen if I put it in my address bar, which I assume would be a very unwise idea? I am confused.

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  • a good resource or book for architecting object-oriented software

    - by Ygam
    I have looked at a couple of books and all I have looked at were just discussing the technicalities of OOP. By technicalities I mean, here's a concept, here's some code, now get working. I have yet to see a book that discusses the architectural process, what are the ways of doing this, why doing this is bad, how to actually incorporate design patterns in a real-world project, etc. Can you recommend a good resource or book? I am mainly programming with PHP but a language-agnostic book/resource would do :)

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  • How do machine code instructions get transferred to the CPU?

    - by user3711789
    I'm currently investigating what the runtime of different programming languages looks like behind the scenes. For a compiled language like C, people usually give the explanation of "Code is compiled to assembly which is assembled and linked into a binary executable. The executable is then loaded into memory and the CPU interprets it." My question is how does the CPU know where to look for the next instruction to execute? Is it a memory address stored in one of the registers?

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  • How do I get stdout into mstest output when running in new app domain?

    - by btlog
    I have been working on test framework, which creates a new app domain to run the tests in. The primary reason being the dll's that we are testing has some horrible code that relies on the dll being located in the app domain path. (No I can't change this code.) The problem that I am having is that my test team is writing a bunch of functional tests in mstest and one of the loggers, that writes to Console.Out, does not have any of the log information captured in the trx output. When running the code through a console app all of the log information is output fine. So do the other loggers that have been implemented. My thought is that mstest is setting its own TextWriter to Console.Out, but the new app doamin has it's own TextWriter for Console.Out as the new app domain has it's own set of statics. I appreciate your ideas.

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  • I want to read a big text file

    - by Rozer
    I want to read a big text file, what i decided to create four threads and read 25% of file by each one. and then join them. but its not more impressive. can any one tell me can i use concurrent programming for the same. as my file structure have some data as name contact compnay policyname policynumber uniqueno and I want to put all data in hashmap at last. thanks

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