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• Updated: How to span multile tables in Django for a backwards relationship

  - 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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• WPF-to stroke arc with two different brushes

  - by user1914725

  i am new to geometric drawing in wpf. i have a volmeter arc that needs to have alert value. The section of the arc beyond that alert value has to be done with a different color than the rest of the arc. hence the arc is brushed with 2 different colors. a path has one brush at a time.hence how i apply two different pens to the same arc? the alert value is obtained with a lot of pain by doing calculations like gemetry.getpointatfraction.it won't easy to apply triggers any suggestions /approach?

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• How can I determine if a composite format string is invalid?

  - by Tinister

  Per the documentation, String.Format will throw a FormatException if either (A) the format string is invalid or (B) the format string contains an index that cannot be found in the args array. I want to be able to determine which (if either) of those conditions fail on any arbitrary string and array of arguments. Is there anything that can do that for me? Thanks!

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• how to set default comments in Xcode?

  - by User

  When we add a new file, In .h & .m file, there is always a comments/documentation section at top. example. // // abc.h // Project name // // Created by myname on 06/11/12. // // How to modify those default comments to : // File Name: abc.h // Created By: myName // Created On: 06/11/12. // Purpose: // Copyright (c) 2012 mycompany name. All rights reserved. Please do help me on this issue

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• Managing code transitions between developers

  - by gAMBOOKa

  What are your best practices for making sure newly hired developers quickly get up to speed with the code? And ensuring developers moving on don't set back ongoing releases. Some ideas to get started: Documentation Use well established frameworks Training / encourage mentoring Notice period in contract

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• See socket options on existing sockets created by other apps?

  - by nailer

  I'd like to test whether particular socket options have been set on an existing socket. Ie, pretty much everything you can see in: #!/usr/bin/env python '''See possible TCP socket options''' import socket sockettypelist = [x for x in dir(socket) if x.startswith('SO_')] sockettypelist.sort() for sockettype in sockettypelist: print sockettype Anyone know how I can see the options on existing sockets, ie those created by other processes? Alas nearly all the documentation I read on Python socket programming is about making new sockets.

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• Can @Inject be made option in JSR 330 (like @Autowire(required=false)?

  - by Eric B.

  Spring's @Autowire can be configured such that Spring will throw an error if no matching autowire candidates are found: @Autowire(required=false) Is there an equivalent JSR-330 annotation? @Inject always fails if there is no matching candidate. Is there any way I can use @Inject but not have the framework fail if no matching types are found? I haven't been able to find any documentation to that extent.

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• How to compare 2 pdf files using command line or any tool

  - by Darzen

  I have to compare 2 pdf files and check if they are same or different. I have tried my luck with WinMerge and Beyond compare. however they dont solve my issue. The issue is that there are 2 files which are exactly same except for the time in which they were saved. I have a piece of code that embeds the time of saving into the file. but i am not supposed to do any modifications to the code I have. Hence the above mentioned tools will say that the files dont match and There is just one difference, that is timestamp. Can anyone suggest me a way to handle this. Please. Thanks

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• How do I serve a binary file through rack?

  - by Chris

  I think I'm being a bit silly here, but I keep getting errors complaining about the SERVER_NAME key missing from the env hash, and I can't find any substantial documentation on Rack::SendFile.. so- how do I serve up files?

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• Extracting iPhone Exposure Setting

  - by dereck

  It seems that a similar question has been asked before, http://stackoverflow.com/questions/373357/obtaining-iphone-photo-exposure-information I wondering with the new iPhone camera, if there is any way to extract exposure data from the camera? it seems that it is able to sample different exposures based on where you focus, but I have yet to find any further documentation. Thanks

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• what is doctrine hydration?

  - by ajsie

  i've read about hydration in doctrine's documentation but i still cant understand what it is. could someone please explain?

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• How do I setup a monit script to check if a directory exists and create it if it doesn't

  - by Timberford

  In the monit documentation I can see there is a check directory command but I can't see any examples of how to use it to see if the directory exists and if it doesn't to create the directory using the mkdir command.

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• Are parallel calls to send/recv on the same socket valid?

  - by Jay

  Can we call send from one thread and recv from another on the same socket? Can we call multiple sends parallely from different threads on the same socket? I know that a good design should avoid this, but I am not clear how these system APIs will behave. I am unable to find a good documentation also for the same. Any pointers in the direction will be helpful.

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• How to make a scrollable widget?

  - by Sebi

  As far as I have read in the Internet and official documentation, it isn't possible to make a scrollable widget. Also all my tries failed. I even tried to subclass TextView to implement my own scroll method, but nothing worked. Are there any ways to achieve that? Btw.... there are solutions if you use for example htc sense or home desktop ++, but i want to make it available to other users which don't use this

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• Get "2:35pm" instead of "02:35PM" from Python date/time?

  - by anonymous coward

  I'm still a bit slow with Python, so I haven't got this figured out beyond what's obviously in the docs, etc. I've worked with Django a bit, where they've added some datetime formatting options via template tags, but in regular python code how can I get the 12-hour hour without a leading zero? Is there a straightforward way to do this? I'm looking at the 2.5 and 2.6 docs for "strftime()" and there doesn't seem to be a formatting option there for this case. Should I be using something else? Feel free to include any other time-formatting tips that aren't obvious from the docs. =)

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• TextInfo.ToTitleCase does not work as expected for ALL CAPS strings

  - by NimsDotNet

  I was trying to use TextInfo.ToTitleCase to convert some names to proper case. it works fine for strings in lowercase and mixed case but for strings with all characters in Upper case, it returns the input string as is. Nothing about this behavior is mentioned in MSDN documentation, any insights?

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• How to find an audio file's length (in seconds)

  - by mIL3S

  Hi all! (Objective C) Just using simple AudioServicesPlaySystemSoundID and its counterparts, but I can't find in the documentation if there is already a way to find the length of an audio file. I know there is AudioServicesGetPropertyInfo, but that seems to return a byte-buffer - do audio files embed their length in themselves and I can just extract it with this? Or is there perhaps a formula based on bit-rate * fileSize to convert to length-of-time? mIL3S www.milkdrinkingcow.com

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• class member access specifiers and binary code

  - by pdehaan

  I understand what the typical access specifiers are, and what they mean. 'public' members are accessible anywhere, 'private' members are accessible only by the same class and friends, etc. What I'm wondering is what, if anything, this equates to in lower-level terms. Are their any post-compilation functional differences between these beyond the high-level restrictions (what can access what) imposed by the language (c++ in this case) they're used in. Another way to put it - if this were a perfect world where programmers always made good choices (like not accessing members that may change later and using only well defined members that should stay the same between implementations), would their be any reason to use these things?

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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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• Is `std::string(strerror(errno))` dangerous?

  - by StackedCrooked

  At some places in my code, I print debug messages like this: int ret = getLinkSpeed(device.getSysName(), linkSpeed); if (ret < 0) { logDebug("Failed to obtain port speed for this device. Error: " + std::string(strerror(errno))); } From the documentation it is not entirely clear if strerror will return 0 under certain conditions (which would cause my code to crash). Does anyone know if it's safe?

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• CComModule::Unlock();

  - by Tony

  I've been trying to determine what this function does, however I cannot seem to find it anywhere under the MSDN documentation of the CComModule class. Could anyone tell me what it is used for?

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• Hadoop application development, and PHP

  - by alwaysarvind

  For hadoop application development, are PHP frameworks less popular ?If so, why? Else,please do point literature/documentation/tutorials for a specific framework? (stuff for Symfony would be awesome!)

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• Align/Wrap images around div

  - by Ryan Phillips

  What I'm trying to achieve is a page with a div centered in the middle of the screen (720x360). This is done with jQuery using $(window).height() and $(window).width() and works perfectly. The next part is getting 180x180 images to fit around that middle div. These will fill the screen + beyond. I'm stuck on how to get these to align that way and I couldn't find a live example of anyone doing the same thing. So, is this even possible? Thanks, Any help is appreciated!

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• How to Add Tab to dotProject's Project page?

  - by userbiasa

  I'm a newbie in PHP. A friend of mine want me to help him set up a Project Management intranet with dotProject. The first request I receive from my friend is add a new tab on Projects page. Does anyone can give me clue on how to do it, since lack of documentation on dotProject website.

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• To find a determinate of Matrix using Boost library in c++

  - by user314097

  Hi, I' am required to convert a MATLAB function into C++, and this requires me to find determinate of a matrix. I was told that use of BOOST library would make my job easier. I went through the documentation of BOOST Library, but couldn't find much info about the same. If anyone could give a template for the above operation, It would be of lot of help and would be greatly appreciated. Thanks Regards

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