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  • Logic for capturing unique characteristics in an object array. C# LINQ [closed]

    - by Shawn H.
    Given the following "response" or array of objects, what would be the most efficient way to get the desired results. There must be an easier way than the exhaustive and tedious way I'm doing it now. A LINQ solution would be fantastic. Situation #1 <things> <thing id="1"> <feature>Tall</feature> </thing> <thing id="2"> <feature>Tall</feature> </thing> <thing id="3"> <feature>Tall</feature> <feature>Wide</feature> </thing> <thing id="4"> <feature>Tall</feature> </thing> </things> Result: Wide Situation #2 <things> <thing id="1"> <feature>Short</feature> </thing> <thing id="2"> <feature>Tall</feature> </thing> <thing id="3"> <feature>Tall</feature> <feature>Wide</feature> </thing> <thing id="4"> <feature>Tall</feature> </thing> </things> Result: Wide, Short, Tall Situation #3 <things> <thing id="1"> <feature>Tall</feature> <feature>Thin</feature> </thing> <thing id="2"> <feature>Tall</feature> </thing> <thing id="3"> <feature>Tall</feature> <feature>Wide</feature> </thing> <thing id="4"> <feature>Tall</feature> </thing> </things> Result: Wide, Thin Thanks.

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  • How do you replace a method of a Moose object at runtime?

    - by xxxxxxx
    Is it possible to replace a method of a Moose object at runtime ? By looking at the source code of Class::MOP::Method (which Moose::Meta::Method inherits from) I concluded that by doing $method->{body} = sub{ my stuff } I would be able to replace at runtime a method of an object. I can get the method using $object->meta->find_method_by_name(<method_name>); However, this didn't quite work out. Is it conceivable to modify methods at run time? And, what is the way to do it with Moose?

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  • How can I make an object's hitbox rotate with its texture?

    - by Matthew Optional Meehan
    In XNA, when you have a rectangular sprite that doesnt rotate, it's easy to get its four corners to make a hitbox. However, when you do a rotation, the points get moved and I assume there is some kind of math that I can use to aquire them. I am using the four points to draw a rectangle that visually represents the hitboxes. I have seen some per-pixel collision examples, but I can forsee they would be hard to draw a box/'convex hull' around. I have also seen physics like farseer but I'm not sure if there is a quick tutorial to do what I want.

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  • How to extend WPF hit testing zone for a Path object.

    - by user275587
    Wpf hit testing is pretty good but the only method I found to extend the hit zone is to put a transparent padding area around your object. I can't find any method to add a transparent area arround a Path object. The path is very thin and I would like to enable hit testing if the user clicks near the path. I can't find any method to extend the path object with a transparent area like the image below : I tried to used a partially transparent stroke brush but I ran into the problem described here : http://stackoverflow.com/questions/1412833/how-can-i-draw-a-soft-line-in-wpf-presumably-using-a-lineargradientbrush I also tried to put an adorner over my line but because of WPF anti-aliasing algorithms, the position is way off when I zoom in my canvas and interfere with other objects hit-testing in a bad way. Any suggestion to extend the hit testing zone would be highly appreciated. Thanks, Kumar

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  • Blender DirectX exporter to Panda3D

    - by jakebird451
    I have been experimenting with Panda3D lately. I have a character made in Blender with various bones and currently with one animation that I wish to export to a *.x format for Panda3D. My current attempt was to export the model was to first export with bones [Armatures] by checking the "Export Armatures" button in the export menu (file name: char.x). Thanks to the *.x file format, I read the file and it seems to have the same bone structure format as the model (with parenting and matrix positional data). The second export was selecting Animations - Full Animation to provide just the animation (file name: char_idle.x). The models exported just fine. I am not sure about the animation yet, but the file seems to be just fine. This is my code for loading the model into python & Panda3D: self.model = Actor("char.x",{"char_idle.x"}) When I run the program the command line provides a couple of errors, the main errors of interest are: :Actor(warning): char.x is not a character! and ... File "C:\Panda3D-1.8.0\direct\actor\Actor.py", line 284, in __init__ if (type(anims[anims.keys()[0]])==type({})): AttributeError: 'set' object has no attribute 'keys' The first error is the most interesting to me. The model works if I leave the animation dictionary blank. With no animations loaded the character appears in its un-animated T position, however the actor warning still shows up. The character should include the various bones when I exported the model right? I am not that experienced with blender, I'm just a programmer. So if the problem lies in blender please try to keep that in mind when posting a reply. I'll try my best to keep up. I also tried to print out the bone structure without any animations loaded and it provides a similar error with the line print self.model.listJoints(): File "C:\Panda3D-1.8.0\direct\actor\Actor.py", line 410, in listJoints Actor.notify.error("no part named: %s" % (partName)) File "C:\Panda3D-1.8.0\direct\directnotify\Notifier.py", line 132, in error raise exception(errorString) StandardError: no part named: modelRoot I really hope it is a simple exporting fix.

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  • Shoulda: How would I use an instance variable outside of a setup or should block?

    - by TheDeeno
    I'm trying to do something like the following: @special_attributes = Model.new.methods.select # a special subset @special_attributes.each do |attribute| context "A model with #{attribute}" setup do @model = Model.new end should "have some special characteristic" assert @model.method(attribute).call end end end However, @special_attributes is out of scope when running the unit tests, leaving me with a nil object on line 2. I can't figure out where to define it to bring it in scope. Any thoughts?

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  • Php code not executing - dies out when trying to create an object of class - no error displayed

    - by Ali
    I'm having some problems with this piece of code. I've included a class declaration and trying to create an object of that class but my code dies out. It doesn't seem to be an include issue as all the files are being included even the files called for inclusion within the class file itself. However the object is not created - I tried to put an echo statement in the __construct function but nothing it just doesn't run infact doesn't create the object and the code won't continue from there - plus no error is reported or displayed and I have error reporting set to E_ALL and display errors set to true WHats happening here :(

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  • How to access a flash object embedded via swfobject's embedSWF?

    - by Andree
    Hi there, I have to call an ActionScript method via Javascript, but I have a problem accessing the flash object itself. I embed the flash file via the help of swfobject. Previously, when I use the static publishing approach, I could easily get the flash object by calling these methods: swfobject.registerObject("flash_object", "9", "expressInstall.swf"); var flash_object = swfobject.getObjectById("flash_object"); For some technical reasons, now I have to use the dynamic publishing approach (using swfobject.embedSWF). But, as mentioned in the documentation, the method getObjectById can only be used if you use static publishing approach. Now, how can I access the flash object? Cheers, Andree

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  • Design Anti-Patterns - C# - Do you call this a God object?

    - by Reddy S R
    I am writing Portfolio module for my web site and it has 3 components. Gallery Category, Gallery, & Gallery Images. I am doing all the request handling, (creating, reading, updating, other), for the above 3 components in 1 class, Portfolio. DB handling jobs for Portfolio module is done in another file. My question is, even just for request handling purpose, can you do all the operations in 1 class? -Reddy

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  • Extending User object in Django: User model inheritance or use UserProfile?

    - by Chris
    To extend the User object with custom fields, the Django docs recommend using UserProfiles. However, according to this answer to a question about this from a year or so back: extending django.contrib.auth.models.User also works better now -- ever since the refactoring of Django's inheritance code in the models API. And articles such as this lay out how to extend the User model with custom fields, together with the advantages (retrieving properties directly from the user object, rather than through the .get_profile()). So I was wondering whether there is any consensus on this issue, or reasons to use one or the other. Or even what the Django team currently think?

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  • Can I filter a django model with a python list?

    - by Rhubarb
    Say I have a model object 'Person' defined, which has a field called 'Name'. And I have a list of people: l = ['Bob','Dave','Jane'] I would like to return a list of all Person records where the first name is not in the list of names defined in l. What is the most pythonic way of doing this?

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  • Is defining every method/state per object in a series of UML diagrams representative of MDA in general?

    - by Max
    I am currently working on a project where we use a framework that combines code generation and ORM together with UML to develop software. Methods are added to UML classes and are generated into partial classes where "stuff happens". For example, an UML class "Content" could have the method DeleteFromFileSystem(void). Which could be implemented like this: public partial class Content { public void DeleteFromFileSystem() { File.Delete(...); } } All methods are designed like this. Everything happens in these gargantuan logic-bomb domain classes. Is this how MDA or DDD or similar usually is done? For now my impression of MDA/DDD (which this has been called by higherups) is that it severely stunts my productivity (everything must be done The Way) and that it hinders maintenance work since all logic are roped, entrenched, interspersed into the mentioned gargantuan bombs. Please refrain from interpreting this as a rant - I am merely curious if this is typical MDA or some sort of extreme MDA UPDATE Concerning the example above, in my opinion Content shouldn't handle deleting itself as such. What if we change from local storage to Amazon S3, in that case we would have to reimplement this functionality scattered over multiple places instead of one single interface which we can provide a second implementation for.

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  • Why does IE8 change flash callback function into object?

    - by Christian Hollbaum
    Hi Guys I have put 2 swf's (using swfobject 2) on the same website; One for playing a movie, and one for controlling the movie (I want to position them seperately, so they can't be in the same swf). I'm doing the communication between the two using javascript with jQuery, and externalcallback functions in both swf's. Everything is running smoothly on all browsers, but IE8. In IE8 I can only call the pause callback function in the control swf once. When it has been called it will not run properly the next time. After trying to debug what is happening live, using javascript's "type of" I have found that IE8 changes the callback function on the flash object from a function into an object when it has been triggered. Can anyone explain why this is happening? .. and maybe suggest how to avoid this? .. or change the object back to a function?

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  • Iterate through a DataTable to find elements in a List object?

    - by Darth Continent
    As I iterate through a DataTable object, I need to check each of its DataRow objects against the items in a generic string List. I found a blog post using the List's Find method along with a delegate, but whereas that example has a separate class (Person), I'm attempting something like the following using an instance of the string object: // My definition of the List object. List<string> lstAccountNumbers = new List<string>(); ... // I populate the List via its Add method. ... foreach (DataRow drCurrentRow in dtMyDataTable.Rows) { if (lstAccounts.Find(delegate(string sAccountNumber) { return sAccountNumber == drCurrentRow["AccountNumber"]; }) { Found_DoSomething(); } else { NotFound_DoSomethingElse(); } } However, with this syntax I'm receiving "Cannot implicitly convert type 'string' to 'bool'" for the if block. Could someone please clarify what I'm doing wrong and how best to accomplish what I'm trying to do?

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  • What's the difference between IEquatable and just overriding Object.Equals() ?

    - by devoured elysium
    I want my Food class to be able to test whenever it is equal to another class. I will later use it against a List, and I want to use its List.Contains() method. Should I implement IEquatable or just override Object.Equals()? From MSDN: This method determines equality by using the default equality comparer, as defined by the object's implementation of the IEquatable.Equals method for T (the type of values in the list). So my next question is: which functions/classes of the .NET framework make use of Object.Equals()? Should I use it in the first place? Thanks

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  • How to store an object in Riak with the Java client?

    - by Jonas
    I have setup Riak on a Ubuntu machine, and it seam to work if I do riak ping. Now I would like to use the Riak Java client to store an object, but it doesn't work. I get com.basho.riak.client.response.RiakIORuntimeException when I try to store an object. What am I doing wrong? Is there a way to test if I can access riak from my java client? Do I have to create a Bucket first? how? import com.basho.riak.client.RiakClient; import com.basho.riak.client.RiakObject; import com.basho.riak.client.response.FetchResponse; public class RiakTest { public static void main(String[] args) { // connect RiakClient riak = new RiakClient("http://192.168.1.107:8098/riak"); // create object RiakObject o = new RiakObject("mybucket", "mykey", "myvalue"); // store riak.store(o); } }

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  • What are the cons of using DrawableGameComponent for every instance of a game object?

    - by Kensai
    I've read in many places that DrawableGameComponents should be saved for things like "levels" or some kind of managers instead of using them, for example, for characters or tiles (Like this guy says here). But I don't understand why this is so. I read this post and it made a lot of sense to me, but these are the minority. I usually wouldn't pay too much attention to things like these, but in this case I would like to know why the apparent majority believes this is not the way to go. Maybe I'm missing something.

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  • Why, in WPF, do we set an object to Stretch via its Alignment properties instead of Width/Height?

    - by Jonathan Hobbs
    In WPF's XAML, we can tell an element to fill its container like this: <Button HorizontalAlignment="Stretch" VerticalAlignment="Stretch" /> Why is it that when we set an element to Stretch, we do it via the HorizontalAlignment and VerticalAlignment properties? Why did the WPF design team decide to take this approach over having Width="Stretch" and Height="Stretch"? I presume it was a calculated decision, and I'm curious about the reasoning. CSS, among other technologies, follows the convention that stretching is done via the width and height properties, and that alignment affects positioning exclusively. This seems intuitive enough: stretching the element is manipulating its width and height, after all! Using the corresponding alignment property to stretch an element seems counter-intuitive and unusual in comparison. This makes me think they didn't just pick this option for no reason: they made a calculated decision and had reasons behind it. Width and Height use the double data type, which would ordinarily mean assigning it a string would be silly. However, WPF's Window objects can take Width="Auto", which gets treated as double.NaN. Couldn't Width="Stretch" be stored as double.PositiveInfinity or some other value?

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  • Engine Rendering pipeline : Making shaders generic

    - by fakhir
    I am trying to make a 2D game engine using OpenGL ES 2.0 (iOS for now). I've written Application layer in Objective C and a separate self contained RendererGLES20 in C++. No GL specific call is made outside the renderer. It is working perfectly. But I have some design issues when using shaders. Each shader has its own unique attributes and uniforms that need to be set just before the main draw call (glDrawArrays in this case). For instance, in order to draw some geometry I would do: void RendererGLES20::render(Model * model) { // Set a bunch of uniforms glUniformMatrix4fv(.......); // Enable specific attributes, can be many glEnableVertexAttribArray(......); // Set a bunch of vertex attribute pointers: glVertexAttribPointer(positionSlot, 2, GL_FLOAT, GL_FALSE, stride, m->pCoords); // Now actually Draw the geometry glDrawArrays(GL_TRIANGLES, 0, m->vertexCount); // After drawing, disable any vertex attributes: glDisableVertexAttribArray(.......); } As you can see this code is extremely rigid. If I were to use another shader, say ripple effect, i would be needing to pass extra uniforms, vertex attribs etc. In other words I would have to change the RendererGLES20 render source code just to incorporate the new shader. Is there any way to make the shader object totally generic? Like What if I just want to change the shader object and not worry about game source re-compiling? Any way to make the renderer agnostic of uniforms and attributes etc?. Even though we need to pass data to uniforms, what is the best place to do that? Model class? Is the model class aware of shader specific uniforms and attributes? Following shows Actor class: class Actor : public ISceneNode { ModelController * model; AIController * AI; }; Model controller class: class ModelController { class IShader * shader; int textureId; vec4 tint; float alpha; struct Vertex * vertexArray; }; Shader class just contains the shader object, compiling and linking sub-routines etc. In Game Logic class I am actually rendering the object: void GameLogic::update(float dt) { IRenderer * renderer = g_application->GetRenderer(); Actor * a = GetActor(id); renderer->render(a->model); } Please note that even though Actor extends ISceneNode, I haven't started implementing SceneGraph yet. I will do that as soon as I resolve this issue. Any ideas how to improve this? Related design patterns etc? Thank you for reading the question.

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  • SQL SERVER – Solution – User Not Able to See Any User Created Object in Tables – Security and Permissions Issue

    - by pinaldave
    There is an old quote “A Picture is Worth a Thousand Words”. I believe this quote immensely. Quite often I get phone calls that something is not working if I can help. My reaction is in most of the cases, I need to know more, send me exact error or a screenshot. Until and unless I see the error or reproduce the scenario myself I prefer not to comment. Yesterday I got a similar phone call from an old friend, where he was not sure what is going on. Here is what he said. “When I try to connect to SQL Server, it lets me connect just fine as well let me open and explore the database. I noticed that I do not see any user created instances but when my colleague attempts to connect to the server, he is able to explore the database as well see all the user created tables and other objects. Can you help me fix it? “ My immediate reaction was he was facing security and permission issue. However, to make the same recommendation I suggested that he send me a screenshot of his own SSMS and his friend’s SSMS. After carefully looking at both the screenshots, I was very confident about the issue and we were able to resolve the issue. Let us reproduce the same scenario and many there is some learning for us. Issue: User not able to see user created objects First let us see the image of my friend’s SSMS screen. (Recreated on my machine) Now let us see my friend’s colleague SSMS screen. (Recreated on my machine) You can see that my friend could not see the user tables but his colleague was able to do the same for sure. Now I believed it was a permissions issue. Further to this I asked him to send me another image where I can see the various permissions of the user in the database. My friends screen My friends colleagues screen This indeed proved that my friend did not have access to the AdventureWorks database and because of the same he was not able to access the database. He did have public access which means he will have similar rights as guest access. However, their SQL Server had followed my earlier advise on having limited access for guest access, which means he was not able to see any user created objects. My next question was to validate what kind of access my friend’s colleague had. He replied that the colleague is the admin of the server. I suggested that if my friend was suppose to have admin access to the database, he should request of having admin access to his colleague. My friend promptly asked for the same to his colleague and on following screen he added him as an admin. You can do the same using following T-SQL script as well. USE [AdventureWorks2012] GO ALTER ROLE [db_owner] ADD MEMBER [testguest] GO Once my friend was admin he was able to access all the user objects just like he was expecting. Please note, this complete exercise was done on a development server. One should not play around with security on live or production server. Security is such an issue, which should be left with only senior administrator of the server. Reference: Pinal Dave (http://blog.SQLAuthority.com) Filed under: PostADay, SQL, SQL Authority, SQL Query, SQL Security, SQL Server, SQL Tips and Tricks, T SQL, Technology

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  • Adding a generic image field onto a ModelForm in django

    - by Prairiedogg
    I have two models, Room and Image. Image is a generic model that can tack onto any other model. I want to give users a form to upload an image when they post information about a room. I've written code that works, but I'm afraid I've done it the hard way, and specifically in a way that violates DRY. Was hoping someone who's a little more familiar with django forms could point out where I've gone wrong. Update: I've tried to clarify why I chose this design in comments to the current answers. To summarize: I didn't simply put an ImageField on the Room model because I wanted more than one image associated with the Room model. I chose a generic Image model because I wanted to add images to several different models. The alternatives I considered were were multiple foreign keys on a single Image class, which seemed messy, or multiple Image classes, which I thought would clutter my schema. I didn't make this clear in my first post, so sorry about that. Seeing as none of the answers so far has addressed how to make this a little more DRY I did come up with my own solution which was to add the upload path as a class attribute on the image model and reference that every time it's needed. # Models class Image(models.Model): content_type = models.ForeignKey(ContentType) object_id = models.PositiveIntegerField() content_object = generic.GenericForeignKey('content_type', 'object_id') image = models.ImageField(_('Image'), height_field='', width_field='', upload_to='uploads/images', max_length=200) class Room(models.Model): name = models.CharField(max_length=50) image_set = generic.GenericRelation('Image') # The form class AddRoomForm(forms.ModelForm): image_1 = forms.ImageField() class Meta: model = Room # The view def handle_uploaded_file(f): # DRY violation, I've already specified the upload path in the image model upload_suffix = join('uploads/images', f.name) upload_path = join(settings.MEDIA_ROOT, upload_suffix) destination = open(upload_path, 'wb+') for chunk in f.chunks(): destination.write(chunk) destination.close() return upload_suffix def add_room(request, apartment_id, form_class=AddRoomForm, template='apartments/add_room.html'): apartment = Apartment.objects.get(id=apartment_id) if request.method == 'POST': form = form_class(request.POST, request.FILES) if form.is_valid(): room = form.save() image_1 = form.cleaned_data['image_1'] # Instead of writing a special function to handle the image, # shouldn't I just be able to pass it straight into Image.objects.create # ...but it doesn't seem to work for some reason, wrong syntax perhaps? upload_path = handle_uploaded_file(image_1) image = Image.objects.create(content_object=room, image=upload_path) return HttpResponseRedirect(room.get_absolute_url()) else: form = form_class() context = {'form': form, } return direct_to_template(request, template, extra_context=context)

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  • Email Validation... advocating the use of +, and how embarrassed would you be to have written this?

    - by Langdon
    I take full advantage of GMail's wildcard feature ([email protected]). Unfortunately it seems that most developers don't understand that + is valid in an email address. This makes trying to unsubscribe a real chore sometimes. Take TicketMaster for example... immediately you notice that they didn't even bother escaping the email address, so the text field defaults to "user [email protected]". Not a problem, we can just add the + manually. Once Submit is clicked, you'll notice the validation stops you right in your tracks. What now? Most users would have to further contact TicketMaster and attempt to explain the situation. I opened up FireBug to investigate. That's when I noticed this whopping 74 line email validation function with so much redundancy it's ridiculous. My favorite check is on line 20, informing the user that his/her email cannot have more than one @. Unreal. My second favorite part is the TWO regular expressions used! Imagine... someone was paid money for this... and by the looks of it, they were paid by the line count. //Validates the email function validateOptoutEmail(object) { var emailStr = object.value; if(emailStr == '' || emailStr == null) { alert('Email can not be empty. Please provide email'); object.value = ''; object.focus(); return false; } else if(Trim(emailStr).length == 0) { alert('Email can not be empty. Please provide email'); object.value = ''; object.focus(); return false; } else { var atcount=0; for(var i=0;i<emailStr.length;i++) { if(emailStr.charAt(i)=='@') atcount++; } if(atcount>1) { alert('Invalid email. Email cannot have more than one @'); object.value = ''; object.focus(); return false; } if(emailStr.indexOf('.') == -1) { alert('Invalid email. Email must have one dot'); object.value = ''; object.focus(); return false; } if(emailStr.indexOf('..')!= -1) { alert('Invalid email. Email cannot have consecutive dots'); object.value = ''; object.focus(); return false; } var dotpos=0; for(var i=dotpos;i< emailStr.length;i++) { var ichar=emailStr.charAt(i); if(ichar=='.') dotpos=i; } for(var i=dotpos+1;i< emailStr.length;i++) { var ichar=emailStr.charAt(i); if((!isNaN(ichar)) || (ichar == '_')) { alert('Invalid email. Email cannot have numbers or _ after dot'); object.value = ''; object.focus(); return false; } } var pattern2=/^([\.-]?\w+)*@\w+([\.-]?\w+)*(\.\w{2,4})+$/; var pattern1=/^[0-9a-zA-Z\-\_.]+@\w+([\.-]?\w+)*(\.\w{2,4})+$/; if (pattern1.test(emailStr)) { if(pattern2.test(emailStr)) { return true; } else { alert('Invalid email'); object.value = ''; object.focus(); } return true; } else { alert('Invalid email'); object.value = ''; object.focus(); return false; } alert('Invalid email'); object.value = ''; object.focus(); return false; } } I eventually just put a break point in FireBug and changed the value of the email address passed into the validation function. From there everything worked fine... All that said, how can we get the word out there that + is valid in an email address? Too often, I'm unable to use the email address that I want to use for certain web sites because developers simply aren't aware of what constitutes a valid email address.

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