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  • BitmapContext on iphone

    - by user315142
    Hello, I am repeatedly drawing to an offscreen bitmap context non-destructivly on iphone. Right now the only way I have figured out to get it to display is to update the drawRect of my UIView with the contents of the context. This runs really slow and seems unnecessary. Does any one know of a way to have the bitmap update on the screen without force refreshing the whole thing?

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  • AJAX, Subdomains and the 200 OK response.

    - by b. e. hollenbeck
    A non-hypothetical but abstracted situation: I have a domain www.foo.com, from which I'm making an AJAX POST to beta.foo.com. Examining the XHR object, I see a response header of 200 OK, but no response text - I even get a response 12B long, which is the exact response (a 12-character string) that I'm expecting - but the response text is blank. If this is a cross-domain issue, why am I getting 200 OK, and better yet - why am I seeing the PHP functions fire on the beta.foo.com side - yet getting no response?

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  • How do I troubleshoot CanoScan LIDE20 on Ubuntu 9.10 in VirtualBox?

    - by kara-marfia
    This may be a VirtualBox question more than anything else. The host OS is Win7, which sees the scanner, but has no drivers for it. VirtualBox sees & recognizes the scanner as "Cannon Scan" and shows "state captured" when I hover over USB devices. Searching gives me many happy reports of this particular scanner being well supported, and that SANE should work with it immediately (also listedin the Supported Hardware List. I get "no devices available" from XSane... and I'm not sure where else I can check. I'd like to see if VirtualBox is telling the truth and find out if the USB port is actually being fed into the virtual OS. Can anyone point me in the right direction of where/how to do that in Ubuntu? Or other bright ideas. I'm starting with a little project to add some zing to my beginner linux studies - I'm sure I haven't checked some obvious things, because I don't know them yet. ;)

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  • How can I include guidance text in Word?

    - by gf131072
    We use several Word documents as templates and currently include 'guidance' text for the reader - in the form of grey, italic text - to provide guidance to the person completing the document. Note how the grey+italic text is used to provide both guidance and example content Problems with this approach include: People forgetting to delete all of this template/boilerplate text People using the italic+grey formatting when inputting real information because they don't change the style We've considered including Reviewing comments as an alternative but this can be a pain and suffers from the first problem above. I'm not sure a simple, elegant solution exists here but if there's something obvious I'm missing I'd love to hear about it.

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  • Recursion Question : Revision

    - by stan
    My slides say that: A recursive call should always be on a smaller data structure than the current one There must be a non recursive option if the data structure is too small You need a wrapper method to make the recursive method accessible Just reading this from the slides makes no sense, especially seeing as it was a topic from before christmas! Could anyone try and clear up what it means please? Thank you

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  • Extract text from PDF (google app engine)

    - by Miroslav Bajtoš
    Is there any free Java library for extracting text from PDF, that is compatible with Google Application Engine? I've read about PDFJet, but it can't read PDF, can it? Is there perhaps other way how to extract text from PDF? I tried http://www.pdfdownload.org/, unfortunately they don't handle non-English characters correctly.

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  • CakePHP 1.3.4: EmailComponent error - Undefined property: EmailComponent::$Controller

    - by Kevin S.
    I'm trying to develop an invitation system for my website which runs on CakePHP 1.3.4. I am trying to use the built in EmailComponent to send an email. I'm getting this error (expanded): Notice (8): Undefined property: EmailComponent::$Controller [CORE/cake/libs/controller/components/email.php, line 428] Code | Context */ function _render($content) { $viewClass = $this-Controller-view; $content = array( "", "" ) EmailComponent::_render() - CORE/cake/libs/controller/components/email.php, line 428 EmailComponent::send() - CORE/cake/libs/controller/components/email.php, line 368 UsersController::send_quick_add_email() - APP/controllers/users_controller.php, line 77 UsersController::quick_add() - APP/controllers/users_controller.php, line 104 SinglesResultsController::quick_add() - APP/controllers/singles_results_controller.php, line 63 Dispatcher::_invoke() - CORE/cake/dispatcher.php, line 204 Dispatcher::dispatch() - CORE/cake/dispatcher.php, line 171 [main] - APP/webroot/index.php, line 83 I also get the following, which I can expand if necessary: Notice (8): Trying to get property of non-object [CORE/cake/libs/controller/components/email.php, line 428] Notice (8): Undefined property: EmailComponent::$Controller [CORE/cake/libs/controller/components/email.php, line 433] Notice (8): Trying to get property of non-object [CORE/cake/libs/controller/components/email.php, line 433] Notice (8): Undefined property: View::$webroot [CORE/cake/libs/view/view.php, line 805] Warning (2): Cannot modify header information - headers already sent by (output started at /Applications/MAMP/htdocs/cake/cake/libs/debugger.php:673) [CORE/cake/libs/controller/controller.php, line 746] I think that the EmailComponent object holds a reference to the controller it's being called from. I don't know why it's undefined in this case. Here is the code that fails (specifically, it errors on the call to $this-Email-send()): function send_quick_add_email($email) { if($email) { $this->Email->reset(); $this->Email->to = $email; $this->Email->subject = 'Some subject text'; $this->Email->from = '[email protected]'; $this->Email->template = 'email_template'; $this->set('user', $user); $this->set('token', $token); $this->Email->delivery = 'debug'; $this->Email->send(); } } Ok, for more clarification: The main data I am collecting on the site is results of a game played in meatspace. SinglesResultsController has an action, quick_add, which expects email addresses of people not already registered on the site. If the email addresses aren't associated with Users, UsersController::quick_add is called, which creates an inactive user, and sends an invitation email in UsersController::send_quick_add_email() I think the problem is related to the fact that the email isn't being sent in the first controller initialized (SinglesResultsController). Any thoughts on how to make it work? The Email component is declared at the top of both Controllers.

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  • installation HDBC-SQlite3 Haskell

    - by snorlaks
    Hello, Im facing the problem during installation : setup configure Configuring HDBC-sqlite3-2.3.0.0... setup: Missing dependency on a foreign library: * Missing C library: sqlite3 This problem can usually be solved by installing the system package that provides this library (you may need the "-dev" version). If the library is already installed but in a non-standard location then you can use the flags --extra-include-dirs= and --extra-lib-dirs= to specify where it is. what should I do ? thanks for any help

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  • Multi screen RDP in Windows 8.1 Enterprise

    - by bgs264
    I have just flattened my machine and installed Windows 8.1 Enterprise Edition. I have used the Hyper-V to create a virtual machine for my Software Development stuff, on my VM I have also installed Windows 8.1 Enterprise Edition. I want to have two screen support when using this VM (not using /span) Both the Hyper-V viewer and Remote Desktop give me a tickbox to "Use all my monitors for the remote session". However even with it ticked (and even when I tried the /multimon switch on the command line), I only get a single screen. Am I missing something - this should be supported in Enterprise edition, right? Is there some extra config I need to do on the RDP host? Forgive me if it's an obvious question, I'm more a developer and just stumbling through ;-) Cheers! Ben

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  • c++ class member functions selected by traits

    - by Jive Dadson
    I am reluctant to say I can't figure this out, but I can't figure this out. I've googled and searched stackoverflow, and come up empty. The abstract, and possibly overly vague form of the question is, how can I use the traits-pattern to instantiate non-virtual member functions? The question came up while modernizing a set of multivariate function optimizers that I wrote more than 10 years ago. The optimizers all operate by selecting a straight-line path through the parameter space away from the current best point (the "update"), then finding a better point on that line (the "line search"), then testing for the "done" condition, and if not done, iterating. There are different methods for doing the update, the line-search, and conceivably for the done test, and other things. Mix and match. Different update formulae require different state-variable data. For example, the LMQN update requires a vector, and the BFGS update requires a matrix. If evaluating gradients is cheap, the line-search should do so. If not, it should use function evaluations only. Some methods require more accurate line-searches than others. Those are just some examples. The original version instatiates several of the combinations by means of virtual functions. Some traits are selected by setting mode bits. Yuck. It would be trivial to define the traits with #define's and the member functions with #ifdef's and macros. But that's so twenty years ago. It bugs me that I cannot figure out a whiz-bang modern way. If there were only one trait that varied, I could use the curiously recurring template pattern. But I see no way to extend that to arbitrary combinations of traits. I tried doing it using boost::enable_if, etc.. The specialized state info was easy. I managed to get the functions done, but only by resorting to non-friend external functions that have the this-pointer as a parameter. I never even figured out how to make the functions friends, much less member functions. Perhaps tag-dispatch is the key. I haven't gotten very deeply into that. Surely it's possible, right? If so, what is best practice?

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  • Java Thread Example ?

    - by JavaUser
    Hi, Anyone give example program which explains Java Threads in a simpler way.For example,we have the following threads t1 , t2 and t3 . Here I want code that shows each thread is executing simultaneously not sequentially like non-threaded java programs. Thx

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  • Is Prince the best way to create PDFs in Ruby on Rails?

    - by Angela
    After several Google searches, it appears that the way to create PDFs in Rails from HTML and CSS (versus a new markup language) is to use Prince. With licensing at $3800 for my non-big-commercial app, I'm wondering if this is, in fact, consensus or people have an alternative they can share the whats and hows.

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  • asp.net MVC: how to catch a 404 error?

    - by Michel
    Hi, in the old days, with asp.net, when i would navigate to a non existing page, the .net framework (or iis?) would throw a 404 and i could attach a default page to that error in the web.config in the custom errors section. but in the asp.net mvc that doesn't seem to work? Does the mvc framework throws some kind of invalid route excpetion saying it can't find any route for my uri or something like that?

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  • Pros and cons of escaping strategies in symfony

    - by zergu
    I am still not sure in that matter. While turned on we're quite safe but some other problems appear (with passing template variables or counting characters). On the other hand we have magic turned off, everything is clear, but we have to manually escape every variable (that come from untrusted source) in templates. By the way, non-magic solution is used in Ruby-on-Rails. So the question is: when starting a new project in symfony do you disable escaping_strategy and why?

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  • Integrating lesser known e-payment gateways full of surprises?

    - by John
    I've integrated about half a dozen e-payment gateways, from popular ones (like paypal) to not-so popular ones. It seems every time I try to integrate a non-popular epayment gateway, I exceed my original time-estimation. I think I'm a decent programmer, but my time estimations probably needs work. Do other programmers run into many "surprises" when integrating e-payment gateways they've never heard of? Any advice will help. thanks

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  • Unresponsive Clojure REPL after exception

    - by Hendekagon
    If I start a REPL and then do something that throws an exception like (use 'non-existent-thing) ** then after that the REPL ceases to evaluate anything I enter. Is there a special key I can press to make it turn round, face me, uncross its arms and listen once more ? Or must I ctrl-d, restart, type everything up to where I was and get it right this time ? ** which results in: Exception in thread "Thread-1" java.lang.RuntimeException: java.io.FileNotFoundException: Could not locate non_existent_thing__init.class or non_existent_thing.clj on classpath: (NO_SOURCE_FILE:0)

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  • java: how to convert a file to utf8

    - by Enrique San Martín
    Hi, i have a file that have some non-utf8 caracters (like "ISO-8859-1"), and so i want to convert that file (or read) to UTF8 encoding, how i can do it? The code it's like this: File file = new File("some_file_with_non_utf8_characters.txt"); /* some code to convert the file to an utf8 file */ ... edit: Put an encoding example

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