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  • How to span multile tables in Django

    - by ipartola
    The Django documentation gives en example like so: b = Blog.objects.get(id=1) b.entry_set.all() Which from what I understand results in 2 queries. What if I wanted to get the blog, the blog entries and all the comments associated with that entry in a number of queries that does not depend on the number of entries? Or do I have to drop down to SQL to do that?

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  • sapply and concurrency in R

    - by JSmaga
    Good afternoon, Somebody asked me a question today and neither did I know the answer nor could I find it in the documentation. This person simply asked me if the sapply function in R was making concurrent calls to the function you want to apply to the list, or if the computation is done sequantially. Does anybody know the answer? What about rapply (the recursive version of this function)? Thanks, Jeremie

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  • The Relationship Between Activities and View Objects - Android

    - by Greenhouse Gases
    I am attempting to learn how to develop on the Android platform but do not quite understand the relationship between Activities and Views, because according to the documentation an Activity is link to a UI object that the user can interact with, but if this is the case where does the whole idea of Views come in? There is probably a very basic explanation but I would appreciate a few pointers all the same. Thanks

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  • Programmatically find device support GPS or not?

    - by RockOn
    Hi! I am trying to find a code which will help to me to find out the device which I used it has a GPS feature or not? I dont want to know its GPS is enable or disable. I just want to that the device has GPS hardware or not throug program. Anyone have any idea pls help.. Thanks and regards. Mintu

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  • javax.crypto AES encryption - Do I only need to call doFinal?

    - by Spines
    I want to do AES CBC encryption in Java. I'm using javax.crypto. After I have the Cipher initialized, do I only need to call doFinal on the clear bytes to properly encrypt it? Or do I need to do something with update? Documentation says update: Continues a multiple-part encryption or decryption operation and doFinal Encrypts or decrypts data in a single-part operation, or finishes a multiple-part operation what exactly do they mean by multiple-part encryption?

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  • Doxygen with C# internal access modifier

    - by Mike Gates
    I am using Doxygen to generate some API docs for a C# project I am working on. I have quite a bit of "internal" functionality in this project and don't want Doxygen producing these signatures in the generated html it produces. I have tried enabling HIDE_FRIEND_COMPOUNDS but this still results in my internal classes being exposed in the generated documentation. Does anyone know how to do this?

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  • What browser incompatibilities does jquery solve?

    - by pd1138
    I'm currently on the fence about using or not using jquery. I've spent hours researching the pros and cons of using jquery (or any library for that matter). One of the big selling points of jquery is that it frees a developer from worrying about browser incompatibilities. I've tried to find any documentation on exactly which incompatibilities it overcomes. So far I haven't found any. Can anyone help me out with this.

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  • error in script

    - by lego69
    can somebody please help, I'm working with C-Shell, I'm trying to run this script set callsTo = "`cut -d" " -f2 ${1}`" echo $callsTo cut receives data from the file which is the first parameter > ./myscript data I need only second field from every row -f2 after that I want to check if the data was stored, but I receive or an error unmatched `. or empty row, what is wrong with my script, thanks in advance for any help

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  • HTML5 Playlist plays 2 videos, How about 4 or 5?

    - by amber
    I'm able to get two videos to play sequentially, (and without pause!) with this code from Apple, (see section 2-4)... http://developer.apple.com/safari/library/documentation/AudioVideo/Conceptual/Using_HTML5_Audio_Video/ControllingMediaWithJavaScript/ControllingMediaWithJavaScript.html ...Yet completely lost as to how to play a 3rd or 5th video. Trouble is I'm a Javascript noob :-(, so if you figure this out please share as much of your code as possible. Thanks much!

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  • SVN: Recurisvely add files?

    - by Mark
    I'm trying svn add *.py --force As the documentation suggests, but I know for a fact it's missing files nested in deeper folders. Why? Is there a standard way to do this with other unix commands too? */*.py will nab a few more files, but it's kind of a pain in the butt to do this for every possible depth.

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  • How much memory is my iphone app using (from Simulator)

    - by Jonathan
    I know this has something to do with Instruments, but well it's kind of confusing and searching for Instruments on Google doesn't help much. I'd like to know how well my app runs, like how much memory it uses. I just don't know where to find something like: "As close as we can tell from the simulator you'll app will currently be using xx MBs of RAM on a real iphone device." I need help on how to get this information.

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  • RegCreateKeyEx - does it update the returned handle on failure?

    - by Permaquid
    MSDN documentation seems silent on whether RegCreateKeyEx ever updates the value of the handle referred to by its second-last parameter when it fails. My tests have only shown it not to update this - i.e., I set h = 0 before the call, pass &h to a call to RegCreateKeyEx to open a non-existent key, and see h = 0 after the call. Does anyone know of any situation in which the handle would be changed?

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  • Serialize boost array

    - by jules
    I would like to serialize a boost::array, containing something that is already serializable. If get this error: error C2039: 'serialize' : is not a member of 'boost::array<T,N>' I have tried to include the serialization/array.hpp header but it did not help. Is there another header to include ? According to the documentation I should be able to do that http://www.chuchusoft.com/serialization/doc/boost_types.html Thanks

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  • Deleting document attachments in CouchDb

    - by henrik_lundgren
    In CouchDb's documentation, the described method of deleting document attachments is to send a DELETE call to the attachment's url. However, I have noticed that if you edit the document and remove the attachment stub from the _attachment field, it will not be accessible anymore. If i remove foo.txt from the document below and save to CouchDb it will be gone the next time I access the document: { "_id":"attachment_doc", "_rev":1589456116, "_attachments": { "foo.txt": { "stub":true, "content_type":"text/plain", "length":29 } } } Is the attachment actually deleted on disk or is just the reference to it deleted?

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  • What is the meaning of client coordinates in SetWindowPos

    - by user1775315
    The documentation for SetWindowPos says the following for the X and Y parameters: X [in] Type: int The new position of the left side of the window, in client coordinates. Y [in] Type: int The new position of the top of the window, in client coordinates. By "client coordinates", does it mean that the parameters specify the position of the client area of the window, or that they specify the position of the window (not the client area) relative to the parent window's client area? Or something else?

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  • How to install launch agent on Mac os x 10.5 / 10.6

    - by Unicorn
    I have developed a launchAgent in cocoa. It works fine for me on dev environment, by placing the plist file in location /Library/LaunchAgents/.To distribute and install this on other laptops, I created the package using package maker tool. As part of installation process I want to change permission of the plist file and copy it to /Library/LaunchAgents location. Could any one tell me how can i achieve this ? Thanks in advance for help....Any help will be appreciated ..!!!!

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  • android tag editor

    - by GatesReign
    It is my first time building an android app. Was wondering firstly, if there are demos that exists which could help me to build a media tag editor (form to edit mp3 files). I would also like to know how to populate the sd card on the emulator. Any help on android would be good. Thanks all!

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