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  • When to use MEF

    - by cmaduro
    I tried Unity and MEF and plain old new. And I am a bit confused as to when exactly you need to use any of these "patterns". Why would I choose to use MEF or Unity if using new is simpler and satisfies my needs. MyObject a = new MyObject(); In other words, what needs justify the use of MEF or Unity?

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  • EF Query Object Pattern over Repository Example

    - by Dale Burrell
    I have built a repository which only exposes IEnumerable based mostly on the examples in "Professional ASP.NET Design Patterns" by Scott Millett. However because he mostly uses NHibernate his example of how to implement the Query Object Pattern, or rather how to best translate the query into something useful in EF, is a bit lacking. I am looking for a good example of an implementation of the Query Object Pattern using EF4.

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  • Error in django url.py??

    - by qulzam
    I am new in django. I try to practice and run the wiki application (i found tutorial at Learn django), In url.py file i write the following urls... urlpatterns = patterns('', (r'^wikicamp/(?p[^/]+)/edit/$','wikiapp.wiki.views.edit_page'), (r'^wikicamp/(?p[^/]+)/save/$','wikiapp.wiki.views.save_page'), (r'^wikicamp/(?p[^/]+)/$','wikiapp.wiki.views.view_page'), ) But there is errror which i cant understand. sre_Constants.error:Unexpected end of pattern. (r'^wikicamp/(?p[^/]+)/$','wikiapp.wiki.views.view_page'),

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  • Complex User Interface -> MVC pattern

    - by glenn.danthi
    I have been reading a lot on MVC/MVP patterns.... I have a simple question....If you have a view with loads of controls....say 10 texboxes and 10 checkboxes....etc etc... Am I expected to specify the properties and events each one of them in my IView interface?....

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  • why my code error,about serve the static file using django..

    - by zjm1126
    my settings.py: DIRNAME = os.path.dirname(__file__) STATIC_DOC_ROOT = os.path.join(DIRNAME, 'media') MEDIA_URL = '/media/' my urls.py: def google(request): return render_to_response('a.html',context_instance=RequestContext(request)) urlpatterns = patterns('', (r'^$',google), (r'^media/(?P<path>.*)$', 'django.views.static.serve',{'document_root':settings.STATIC_DOC_ROOT,'show_indexes': True}), ) and my a.html is: <script type="text/javascript" src="/media/jquery-1.4.2.js"></script> <script type="text/javascript"> alert($) </script> but,it can't defiend the '$' why ? thanks

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  • Software Engineering Papers

    - by kunjaan
    Please recommend me software engineering/methodology/practices paper. So far I have enjoyed: 1968 Dijkstra : Go To Statement Considered Harmful Nikalus Wirth : Program Development by Stepwise Refinement 1971 David Parnas : Information Distribution Aspects of Design Methodology 1972 Liskov : Design Methodology for Reliable Software Systems Extensible Language : Schuman and P Jourrand R. Balzer Structured Programming : Dahl - Hierarchical Program StructuresImplementation Patterns 1971 Jim Morris Protection in Programming Languages 1973 Bill Wulf and Mary Shaw Global Variable Considered Harmful 1974 : Lisko and Zilles ADTs

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  • Software patents in US/Europe? [closed]

    - by WeNeedAnswers
    I don't quite understand how the patent system works in the US and in much respect to Europe. I have heard that a pattern of operation can be patented. what are the implications, has anyone been taken to court yet over a software patent based on pattern of usage. I have seen the cases with nokia, palm and Apple. If I write something based on these patterns of operation, will I need a licence?

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  • Cannot use "image.save" on django

    - by zjm1126
    My error is: IOError at /mytest/photo/upload/ [Errno 2] No such file or directory: u'/mytest/photo/upload/2.png' And my view is: UPLOAD_URL = '/mytest/photo/upload/' def upload(request): buf = request.FILES.get('photo', None) print buf if buf: #data = buf.read() #f = StringIO.StringIO(data) image = Image.open(buf) #image = image.convert('RGB') name = '%s%s' % (UPLOAD_URL, buf.name) image.save(file(name, 'wb'), 'PNG') return HttpResponse('ok') return HttpResponse('no') And my urls.py is: urlpatterns = patterns('mytest.views', url(r'^photo/upload/$','upload',name="") ) How can I fix this?

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  • JPA - Removing entities

    - by James P.
    I have a Story entity with the following associations: Story <1-* Chapter Story <1-* Comment Story <*-1 User What is the correct way of removing this entity and handling the all the entities that is referring to? Is there some shorthand way of specifying that associated entities must be handled automatically or is the @PreRemove annoation mentionned in the article below a valid of achieving this? http://blog.xebia.com/2009/04/09/jpa-implementation-patterns-removing-entities/

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  • validating data in .net

    - by Chen Kinnrot
    i'm looking for recommended validation frameworks, or patterns for an n-tier client application, i wanna write the validation once and ind it to wpf gui, and also for server side and client side related bussiness logic

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  • software engineer self improvment [closed]

    - by radi
    hi all , i am a 4th year student at software engineering department , at my faculty we study software engineering basics (unified process , uml , design patterns ) , so : what about these technics ? do i need to learn another (or new such as agile) ? what about programming languages (frameworks) ? what i need to learn ? why ? thanks

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  • app-engine-patch and "object_detail" view didn't work

    - by Hugh
    Hi(Sorry for my ugly english) When I calling the flowing: http://192.168.62.90:8000/blog/entry/?agphdXR1bW4xOTEychALEgpibG9nX2VudHJ5GCYM will use this: urlpatterns = patterns('', (r'^media/(?P<path>.*)$', 'django.views.static.serve', {'document_root': settings.MEDIA_ROOT, 'show_indexes': True}), (r'^$', list_detail.object_list, entry_info), (r'^entry/(?P<object_id>.*)$', list_detail.object_detail, {'queryset': Entry.all(), 'template_name': 'sample_test_page.html'}), ) and the error is: Generic view must be called with either an object_id or a slug/slug_field. I want to know why this didn't work for me.

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  • C programming getting back into it - the red pill

    - by JavaRocky
    Can someone provide recommended reading, website resources or best practices to follow when programming with C. I am a proficient software developer with strong skills in Java and PHP. Is there standard libraries these days which people use? Like what spring is to java? And standard design patterns for managing memory or even standard libraries for that fact? I want to write solid, maintainable C programs. GO THE RED PILL! :P

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  • Service Layer which can switch between Web Service Layer and Data Access Layer

    - by Blake Blackwell
    I am building an application that will function as a client-server application, and also as a disconnected client application. I will be using WPF (browser app for client-server application). When interacting with the server's database, I will need to connect using WCF web services. When connecting with the localized database, I will need to connect using the local db's data access layer. What methods/patterns exist for this sort of architecture?

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  • How to make SVN ADD ignore binaries

    - by fuenfundachtzig
    Binaries (under Linux) don't have an extension so I cannot exclude them using patterns. Thus when I use SVN add to add a directory I will get something like $ svn add recursion_vector/ A recursion_vector A recursion_vector/rec_vec.cxx A recursion_vector/rec_vec.h A (bin) recursion_vector/rec_vec Here rec_vec is the executable I would like to exclude. SVN obviously recognizes it as binary. Now can I tell Subversion to ignore all binary files?

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  • One-liner to determine who wins in Rock, Paper, Scissors

    - by asmeurer
    So I am writing a simple Rock, Paper, Scissors game in C (it's for an assignment by the way, though the main thing is to learn sockets. Also, I suspect it will be due before I get a good answer). I have it setup as Rock=0, Paper=1, and Scissors=2. Is there an easy one-liner to determine who wins? I tried playing around with it on paper, but I couldn't figure out any patterns.

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  • File diff in MSBuild?

    - by Bejo
    How do I diff two files in MSBuild? I cannot find any specific task to do it. If possible, is it also possible to exclude certain rows, or patterns in the files eg. 2009-12-09T10:03:07.6888125+02:00

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  • Bad method names and what it says about code structure.

    - by maxfridbe
    (Apologies in advance if this is a re-post but I didn't find similar posts) What bad method name patterns have you seen in code and what did it tell you about the code. For instance, I keep seeing: public void preform___X___IfNecessary(...); I believe that this is bad because the operation X has an inversion of conditions. Note that this is a public method because classes methods might legitimately require private helpers like this

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