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  • What do I need to know before working on an IM application?

    - by John
    I'm looking into building an IM-type application using Java stack (for the server at least). I'd be interested to see any information/advice on how applications like Skype/AIM/MSN work, as well as know any technologies/APIs that might be relevant. Without giving away the idea itself, it's perhaps more akin to Google Wave than Skype, but information useful for either is very welcome. Specific points I have already thought of include: Server Vs P2P... for reasons of logging my system will require all communication to go through a central server. Is this how other IM tools work... especially when audio/video comes into the equation? Cross-communication with other systems. Are there APIs for this or do all IM providers work hard to keep their protocol secret? The nature of what I'm designing means integration could probably only be limited, but it definitely seems worthwhile from a business perspective

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  • WINDOWS: Your computer hangs. You can windows + R (run dialog) but performance is so halted taskMGR

    - by John Sullivan
    The question is, what process are available to try to recover from total system instability before pulling the plug when we can do nothing but programs or batches in the path from the run dialog (windows + r key), and performance is so dead that taskMGR / procEXP / other programs with visual guis are not usable? I am not a windows expert, but ideally someone out there has written a program that does more or less stuff like this: Immediately set (or perhaps I can set from the run prompt) its priority to extremely high, evaluate performance bottlenecks. E.g. is CPU 100%? If so identify offending program(s) or problems. Attempt / log fixes, then provide crude feedback asking the user if his performance has stabilized enough to abort, wait a few seconds, if no feedback continue, etc. etc. Eventually try to do any "system cleanup" if the program decides it cannot recover and perhaps finally provide a series of beeps to the user, or what have you, to say "OK, I give up, time to pull the plug". Ideally create a log, when able. These kinds of horrible hangs are a situation where surely trying something, anything, is better than nothing -- as long as that something is intelligent -- when the alternative is ripping out the power coord. Again, I am not a windows expert, so perhaps there is a much more elegant "hands on" approach I am not aware of.

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  • enable TCP in SQL server 2005 express edition

    - by david
    Hello, sorry for answer but how to enable TCP in SQL server 2005 express edition? I used configuration manager, find network configuration/protocols and there enabled TCP, after that I have restarted sql server service and tried installation of problematic software again (software which told me that TCP is not enabled) but I have the same problem :-(

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  • How do you extend the Site model in django?

    - by John Giotta
    What is the best approach to extending the Site model in django? Creating a new model and ForeignKey the Site or there another approach that allows me to subclass the Site model? I prefer subclassing, because relationally I'm more comfortable, but I'm concerned for the impact it will have with the built-in Admin.

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  • Add text into a desktop application

    - by John
    Hello, I would like to come up with a simple application that would add a specific phrase into a specific location on a desktop application. I assume this isn't very hard, but I'm kind of new. Any help?? Thanks!

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  • call_user_function_array() and __construct

    - by John
    I'm working on a simple framework, and I'm having a slight problem. I'd like to use call_user_function_array() to pass parameters to a function. That's fine, except the function I want to pass it to is __construct. I can't create an instance of an object with cufa(), and by instantiating an object, and then using cufa to call that instance's __construct(), I run into problems with a broken class because I'm calling the constructor twice (and one time it's called wrong.)

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  • Application window sent behind other windows on closing different thread (C#)

    - by david.murrant
    I'm writing a Windows Forms Application in C#.NET On startup, the application displays a splash screen which is running in a separate thread. Whilst the splash screen is showing, the main application is initialising. Once the main application has finished initialising, the main form of the application is displayed, and the splash screen still shows over the top. Everything so far is as expected. Then, the Splash screen is closed, which causes that thread to exit. For some reason, at the point, the main application windows gets sent behind all other open Windows, notably the Windows Explorer window where you clicked the .exe file to run the application in the first place! What could be causing the windows to suddenly jump "behind" like this?

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  • SVN: change a past revision and have the change in current

    - by John Isaacks
    ok say I am on revision 4. I check it out, make some change and commit it. I am not on revision 5. I check it out again, am making some changes, but I am informed that there was a typo from revision 5 that needs to be changed right away. I don't want to fix it in my current working copy because I am in the middle of something and it wont be ready to commit yet. But I don't want to revert back to revision 5 and loose all my work. what I want to do is go back to revision 5, make the small change, commit it. And ALSO have that change made to my current working copy as well. I hope that makes sense. Is there a way to do that?

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  • Check and avoid if a char is being entered in a int

    - by John
    Hi.... This is a exremely stupid question but i need help with this.... I'm trying to make a small program that i made robust and needed some help with tht.... int num1; int num2 = 0; System.out.print("Enter number 1: "); num1 = kb.nextInt(); while(num2<num1) { System.out.print("Enter number 2: "); num2 = kb.nextInt(); } Number 2 has to be greater than number 1 Also i want the program to automatically check and ignore if the user enters a char instead of an int... Cause right now when a user enters lets say "r" instead of a number the program just exists....

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  • python dict.fromkeys() returns empty

    - by slooow
    I wrote the following function. It returns an empty dictionary when it should not. The code works on the command line without function. However I cannot see what is wrong with the function, so I have to appeal to your collective intelligence. def enter_users_into_dict(userlist): newusr = {} newusr.fromkeys(userlist, 0) return newusr ul = ['john', 'mabel'] nd = enter_users_into_dict(ul) print nd It returns an empty dict {} where I would expect {'john': 0, 'mabel': 0}. It is probably very simply but I don't see the solution.

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  • interpreting assembly instructions

    - by David Lee
    I am trying to translate the following: Action: pushl %ebp movl %esp, %eax subl $32, %esp movl $0, -8(%eax) movl $0, -4(%eax) movl -4(%eax), %eax cmpl 32(%eax), %ebp movl -4(%ebp), %eax sall $2, %ebp addl 8(%ebp), %ebp movl (%ebp), %ebp addl %ebp, -8(%eax) addl $1, -4(%eax) What is the best way to learn assembly and translating this code?

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  • Is there a way to reliably detect the total number of CPU cores?

    - by John Sheares
    I need a reliable way to detect how many CPU cores are on a computer. I am creating a numerically intense simulation C# application and want to create the maximum number of running threads as cores. I have tried many of the methods suggested around the internet like Environment.ProcessorCount, using WMI, this code: http://blogs.adamsoftware.net/Engine/DeterminingthenumberofphysicalCPUsonWindows.aspx. None of them seem to think a AMD X2 has two cores. Any ideas?

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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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  • Is there a way to organize a icon collection to allow for easy searching?

    - by John M
    Is there any way of organizing a icon collection so that it easier to find needed icons? For example: the program needs a save icon there are 5 icons collections on your HD that have a save icon and there are 5 more collections that don't have a save icon (but you don't know that) do you browse through each icon collection? run a search (assumes files are named consistently)? Would it be ideal to have some sort of organized directory (printable?)?

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  • What's the best way to do Ruby gemspec creation and dependency management?

    - by John Feminella
    Over the last few months, there have been a number of rapid developments in the state of Ruby dependency management and gem creation, to the point where I've been having trouble keeping up with everything. If I'm writing a new gem, what's the best tool for me to use to create my gemspec? Are there disadvantages of using this tool over competitors? I've used Bundler a few times on applications and for me it's been a lifesaver. Is the consensus that it is suitable for use with production apps? Are there quirks or idiosyncracies people should be aware of? Links to resources you've used and have found helpful would also be much appreciated.

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  • Notepad++ regular expression find and replace $_REQUEST with $_GET but a more secure

    - by David
    What I am doing is replacing, in a large program, all $_REQUEST['var'] and mysql_escape_string($_REQUEST['var']) with either the 1st or 2nd line below the dotted line. Now, I have figured out this much of the regular expression but I would like to make it simpler. Instead of having to run the top one first then the 2nd one I would like to just run one all together. I tried this but it did not work. (mysql_escape_string\()*$_REQUEST\[\'([^']*)\'\]\)(\)*) So below is what works but again have to do it twice. $_REQUEST\[\'([^']*)\'\] mysql_escape_string\($_REQUEST\[\'([^']*)\'\]\) (isset($_GET['\1'])?mysql_real_escape_string($_GET['\1']):false) (isset($_POST['\1'])?mysql_real_escape_string($_POST['\1']):false) ============================ Update: Yeah, after some research I figured out that Notepad++ does not support most regular expressions. I guess one additional step can not hurt a person. It's just laziness. *NOTE: BUT if anyone wants to try feel free to comment. At least it is just 2 steps and not 20.

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  • Django: Save an uploaded file to a FileField

    - by David Wolever
    I feel a little stupid for having to ask this… But I can't seem find it documented anywhere. If I've got a Model with FileField, how can I stuff an uploaded FILE into that FileField? For example, I'd like to do something like this: class MyModel(Model): file = FileField(...) def handle_post(request, ...): mymodel = MyModel.objects.get(...) if request.FILES.get("newfile"): mymodel.file = request.FILES["newfile"] But that doesn't appear to work.

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  • Avoiding sub-type selection in view code

    - by John Donoghue
    Hi, I have some code where the model contains some classes like (vb.net pseudocode, but could be any OO language): Enum AttributeType Boolean Date String End Enum MustInherit Class Attibute Must Override Function Type As AttributeType End Class Class BooleanAttribute: Attribute Function Type As AttributeType Return AttributeType.Boolean End Function End Class And the view contains some code like: Select Case AttributeType Case Boolean //Display checkbox control Case Date //Display date picker control Case String //Display textbox control End Select I don't really like the code in the view, for the hopefully obvious reasons (what happens when I get a new attribute type etc). My question is, how should I replace it? I could easily add a method to the concrete classes, but that pollutes the model with UI stuff so that's a horrible idea. I could move the select into a factory, but that seems to be just hiding the problem. Can anybody advise a better approach?

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  • grails: quering in a composite structure

    - by Asaf David
    hey i have the following domain model: class Location { String name static hasMany = [locations:Location, persons:Person] } class Person { String name } so basically each location can hold a bunch of people + "sub-locations". what is the best way to recursively query for all persons under a location (including it's sub locations, and their sub locations, etc')?

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  • vim autopopulate file

    - by David Oneill
    Is it possible to have VIM auto populate a file based on the extension? For example, when I open a new .sh file, I would like VIM to automatically type #!/bin/bash as the first line. (This example simplified down to the essentials)

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  • How to realize this in Transact SQL ( SQL Server 2008 )

    - by David
    I just want an update trigger like this postgresql version... It seems to me there is no NEW. and OLD. in MSSQL? CREATE OR REPLACE FUNCTION "public"."ts_create" () RETURNS trigger AS DECLARE BEGIN NEW.ctime := now(); RETURN NEW; END; Googled already, but nothing to be found unfortunately... Ideas?

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  • XPATH remove attribute

    - by David
    Hi does anyone know hwo to remove an attrbute using xpath. In particular the rel attribute and its text from a link. i.e. <a href='http://google.com' rel='some text'>Link</a> and i want to remove rel='some text'. There will be multiple links in the html i am parsing.

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