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Communicating from website to desktop application (not vice-versa)

- by chakrit

I am designing an application such that it will have to react to certain actions required by the website, mostly the same way Last.FM client does (if you have used one) The way Last.FM client works is that, it will register a custom protocol in Windows (lastfm://) and on their website, they use that protocol to trigger certain action on the player, e.g.: lastfm://artist//similarartists will actually direct any Last.FM client running to load up similar artists. I would like to do the same thing for my application. Is this a good idea? Is there any good alternatives to send a message from a website to a desktop client in this manner?

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Efficiently compute the row sums of a 3d array in R

- by Gavin Simpson

Consider the array a: > a <- array(c(1:9, 1:9), c(3,3,2)) > a , , 1 [,1] [,2] [,3] [1,] 1 4 7 [2,] 2 5 8 [3,] 3 6 9 , , 2 [,1] [,2] [,3] [1,] 1 4 7 [2,] 2 5 8 [3,] 3 6 9 How do we efficiently compute the row sums of the matrices indexed by the third dimension, such that the result is: [,1] [,2] [1,] 12 12 [2,] 15 15 [3,] 18 18 ?? The column sums are easy via the 'dims' argument of colSums(): > colSums(a, dims = 1) but I cannot find a way to use rowSums() on the array to achieve the desired result, as it has a different interpretation of 'dims' to that of colSums(). It is simple to compute the desired row sums using: > apply(a, 3, rowSums) [,1] [,2] [1,] 12 12 [2,] 15 15 [3,] 18 18 but that is just hiding the loop. Are there other efficient, truly vectorised, ways of computing the required row sums?

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Handling Dialogs in WPF with MVVM

- by Ray Booysen

In the MVVM pattern for WPF, handling dialogs is one of the more complex operations. As your view model does not know anything about the view, dialog communication can be interesting. I can expose an ICommand that when the view invokes it, a dialog can appear. Does anyone know of a good way to handle results from dialogs? I am speaking about windows dialogs such as MessageBox. One of the ways we did this was have an event on the viewmodel that the view would subscribe to when a dialog was required. public event EventHandler<MyDeleteArgs> RequiresDeleteDialog; This is OK, but it means that the view requires code which is something I would like to stay away from.

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How to get started with embedded systems in the aircraft or submarine industries?

- by Jason

Hi, Not 100% sure how to frame this question but here goes... I currently work as a Rails developer but want to work on more substancial / "meaty" projects and have always been very interested in embedded systems, especially systems that run on aircraft and especially submarines.....I know strange combination. I have been doing some searching & found lockheed martin produces a lot of underwater systems for various navys around the world e.g. http://www.naval-technology.com/projects/nssn/ However, there is very little information about what software is used within these systems, what OS's they use or anything else "technical", presume there is a lot of C / C++ involved but that is just a guess... so its hard to know where to even begin learning what is required to potential work in these areas. Just wondering if anyone has any experiance working with or more information about embeddeed systems in either the airline (onboard flight systems) or especially submarine systems? Thanks!

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How do you set up your web server & document's html to correctly serve HTML5 documents?

- by joedevon

Maybe I'm an idiot but I don't quite get what goes in the header of my HTML to use XHTML w/ HTML5. Is this still good and we just add the HTML5 tags?: <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd"> <html dir="ltr" lang="eng" xmlns="http://www.w3.org/1999/xhtml"> Or is it <!DOCTYPE html> or what? Then at A List Apart they say: If you do go with XHTML 5, remember that your server must deliver the documents with a MIME type of application/xhtml+xml or text/xml. Please explain to me as if I was stupid :) what that means in a practical sense? "deliver the documents"? Meaning html? What happens to php? What are the steps required to set up your web server this way?

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Linker Error: iPhone Unit Test Bundle referencing App classes

- by ohhorob

Starting with an app already in development, I have carried out the instructions in the iPhone Development Guide – Unit Testing Applications I can successfully include and use my App's classes in Application-style tests that run on the device, and output their results to the console. If I add the following line of code: STAssertTrue([viewController isKindOfClass:[LoginViewController class]], @"Top view controller is not LoginViewController"); The following build error is generated: Undefined symbols: "_OBJC_CLASS_$_LoginViewController", referenced from: __objc_classrefs__DATA@0 in LoginViewTest.o ld: symbol(s) not found collect2: ld returned 1 exit status I can provide more configuration information for the project and the Testing target, but the setup works file without the [LoginViewController class] line in the test source. Without that line, I can reference the class, use it's properties and send it messages successfully. Is there a linking build setting, or bundle loading option that is required when attempting to use an App class in this fashion? Or should I find another type of test to confirm that the class of an object is the expected one?

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How to Integrate SharePoint 2007/2010 and Google Apps?

- by goober

Hello All, My (smaller) company has an existing Google Apps Deployment, used for E-Mail / Calendar, etc. I'm looking into a SharePoint setup (2010 most likely). One of the best features is that new events are added to one's Outlook Calendar, e-mails can be sent automatically, etc. Naturally, this works best out-of-the-box with Exchange. I know I can add my own OpenID login system via an OpenID provider for SharePoint and get my users into the system. My question is, can anyone recommend the best way to go about making sure that events automatically find their way into users' calendars and e-mails on the Google Apps system? This would enable us to deploy SharePoint without worrying about migrating our e-mail system to Exchange first (Google Apps is more cost-effective for our needs and I'm required to keep it.) Thanks in advance for any help!

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fluent interface program in Ruby

- by intern

we have made the following code and trying to run it. class Numeric def gram self end alias_method :grams, :gram def of(name) ingredient = Ingredient.new(name) ingredient.quantity=self return ingredient end end class Ingredient def initialize(n) @@name= n end def quantity=(o) @@quantity = o return @@quantity end def name return @@name end def quantity return @@quantity end end e= 42.grams.of("Test") a= Ingredient.new("Testjio") puts e.quantity a.quantity=90 puts a.quantity puts e.quantity the problem which we are facing in it is that the output of puts a.quantity puts e.quantity is same even when the objects are different. what we observed is that second object i.e 'a' is replacing the value of the first object i.e. 'e'. the output is coming out to be 42 90 90 but the output required is 42 90 42 can anyone suggest why is it happening? it is not replacing the object as object id's are different..only the values of the objects are replaced.

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fluent interface program in Ruby

- by intern

we have made the following code and trying to run it. class Numeric def gram self end alias_method :grams, :gram def of(name) ingredient = Ingredient.new(name) ingredient.quantity=self return ingredient end end class Ingredient def initialize(n) @@name= n end def quantity=(o) @@quantity = o return @@quantity end def name return @@name end def quantity return @@quantity end end e= 42.grams.of("Test") a= Ingredient.new("Testjio") puts e.quantity a.quantity=90 puts a.quantity puts e.quantity the problem which we are facing in it is that the output of puts a.quantity puts e.quantity is same even when the objects are different. what we observed is that second object i.e 'a' is replacing the value of the first object i.e. 'e'. the output is coming out to be 42 90 90 but the output required is 42 90 42 can anyone suggest why is it happening? it is not replacing the object as object id's are different..only the values of the objects are replaced.

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Swapping values using pointers

- by xbonez

I have this code fragment int i = 5; int k = 7; int * iPtr; int * jPtr; int * kPtr; iPtr = &i; kPtr = &k; I am required to swap i and k using the pointers. This is how I'm doing it: *jPtr = *kPtr ; *kPtr = *iPtr ; *iPtr = *jPtr ; Is this the best way to do it, or is there a better way?

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SQL Query - 20mil records - Best practice to return information

- by eqiz

I have a SQL database that has the following table: Table: PhoneRecords ID(identity Seed) FirstName LastName PhoneNumber ZipCode Very simple straight forward table. This table has over 20million records. I am looking for the best way to do queries that pull out records based off area codes from the table. For instance here is an example query that I have done. SELECT phonenumber, firstname FROM [PhoneRecords] WHERE (phone LIKE '2012042%') OR (phone LIKE '2012046%') OR (phone LIKE '2012047%') OR (phone LIKE '2012083%') OR (phone LIKE '2012088%') OR (phone LIKE '2012841%') As you can see this is an ugly query, but it would get the job done (if I wasn't running into timeout issues) Can anyone tell me the best way for speed/optimization to do the above query to display the results? Currently that query above takes around 2 hours to complete on a 9gb 1600mhz ram, i7 930 quadcore OC'd 4.01ghz. I obviously have the computer power required to do such a query, but still takes too long for queries.

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iPhone Web Appication deployment and distribution process

- by yakub_moriss

Hi,All --I haven't develop any iPhone Web Application ever...so i am little bit confuse about that. --I want to build a Web Application for iPhone which will be made using(CSS+JavaScript). --I read some where that no approval is required for iPhone Web Application. is it correct ? --And if i have made my iPhone Web Application (using CSS+JavaScript)and uploaded at my server. --and if i want to open it in UIWebView using iPhone SDK simply... --is this Application is valid for iPhone Web Application portal https://adcweb.apple.com/iphone/index.php or not ? --how can end users get the Application on their iPhone after submiting to the portal... --can any one explain me the whole process of iPhone Web Application deployment and distribution process ? Thanks in advance...

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iOS and Infrared

- by Mustafa

Is it possible to communicate with an Infrared device (USB Infrared, TV, Mobile Phone, etc) using iOS (iPhone or iPad)? Well, i know it's possible, since there are many remote/universal remote applications in the AppStore. I basically want to know how? What are the limitations and requirements? What kind of additional hardware is required? If it's available in the market? Which protocols should i know about? Which iOS libraries can help me in the process. Can anyone point me in the right direction. Thanks.

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C# Virtual Mode List View Click 1 Selects More Than One Items

- by Samir

I have a list view with virtual mode set to true and other things. It doing ok. But 1) Say there are 25 items and 15 of them are visible, that is to see the rest of 10 items need to scroll down. 2) Before scrolling swap two items, say myItems[0], it must be visible & myItems[20], it must be not visible scroll required. 3) Now select the first item, it was swapped, you now have two items selected, both 0 indexed and 20 indexed ones. When after swap, those two list view items are of same Position and same Bounds. But before 20-indexed item's Position was (-1, -1) and Bounds was (0,0,0,0). How come 0-indexed item didn't change its position & size? How to solve this ?

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install CakePHP on Mac osx: apache problems

- by ed209

First time cake user and I'm having real apache problems. For some reason the .htaccess is trying to find File does not exist: /Library/WebServer/Documents/Users but there is no such directory as Users. I have tried setting up the following also: /etc/apache2/extra/httpd-vhosts.conf <VirtualHost *:80 > DocumentRoot "/Users/username/Sites/mysite/app/webroot" ServerName mysite.dev ServerAlias www.mysite.dev mysite.dev *.mysite.dev <Directory "/Users/username/Sites/mysite/app/webroot"> Options Indexes FollowSymLinks AllowOverride All </Directory> </VirtualHost> /etc/hosts 127.0.0.1 mysite.dev /etc/apache2/users/username.conf <Directory "/Users/username/Sites/"> Options Indexes MultiViews FollowSymlinks AllowOverride All Order allow,deny Allow from all </Directory> That also hasn't worked, but with a different error Failed opening required 'cake/libs/cache/file.php' Although I'd rather not use virtual hosts, and just run it off localhost

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passing self data into a recursive function

- by user272689

I'm trying to set a function to do something like this def __binaryTreeInsert(self, toInsert, currentNode=getRoot(), parentNode=None): where current node starts as root, and then we change it to a different node in the method and recursivly call it again. However, i cannot get the 'currentNode=getRoot()' to work. If i try calling the funcion getRoot() (as above) it says im not giving it all the required variables, but if i try to call self.getRoot() it complains that self is an undefined variable. Is there a way i can do this without having to specify the root while calling this method?

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How can I create a simple message box in Python?

- by Carson Myers

I'm looking for the same effect as alert() in JavaScript. I wrote a simple web-based interpreter this afternoon using Twisted.web. You basically submit a block of Python code through a form, and the client comes and grabs it and executes it. I want to be able to make a simple popup message, without having to re-write a whole bunch of boilerplate wxPython or TkInter code every time (since the code gets submitted through a form and then disappears). I've tried tkMessageBox: import tkMessageBox tkMessageBox.showinfo(title="Greetings", message="Hello World!") but this opens another window in the background with a tk icon. I don't want this. I was looking for some simple wxPython code but it always required setting up a class and entering an app loop etc. Is there no simple, catch-free way of making a message box in Python?

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PropertyGrid - is it customizable?

- by serhio

I have a project in that we have to represent some graphic objects on a usercontrol in WYSIWYG. Also is required to edit each objects properties(Color, Location, etc). I hesitate between using PropertyGrid ('direct' properties edit) and custom forms on DoubleClick ('indirect' edit). The PropertyGrid is very well but should correspond a some criteria: Only selected properties are Displayed (by e.g. if I have TextRectangle want display only Text and Location); Property names should be customizable and internationalizable (by e.g. TextRectangle Text property should be named "Company Name" or "???????? ???????????"). Now about is it possible I think the answer could be Yes, but is it reasonable to use it if we have not a lot of time. What could be quicker implemented, custom forms or Property panel?

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Using Apache Velocity with StringBuilders/CharSequences

- by mindas

We are using Apache Velocity for dynamic templates. At the moment Velocity has following methods for evaluation/replacing: public static boolean evaluate(Context context, Writer writer, String logTag, Reader reader) public static boolean evaluate(Context context, Writer out, String logTag, String instring) We use these methods by providing StringWriter to write evaluation results. Our incoming data is coming in StringBuilder format so we use StringBuilder.toString and feed it as instring. The problem is that our templates are fairly large (can be megabytes, tens of Ms on rare cases), replacements occur very frequently and each replacement operation triples the amount of required memory (incoming data + StringBuilder.toString() which creates a new copy + outgoing data). I was wondering if there is a way to improve this. E.g. if I could find a way to provide a Reader and Writer on top of same StringBuilder instance that only uses extra memory for in/out differences, would that be a good approach? Has anybody done anything similar and could share any source for such a class? Or maybe there any better solutions to given problem?

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WF4RC, How to: Activity to Xaml?

- by johnny g

Hello all, I have Googled a bit, and cannot seem to find any examples of Xaml-fying Activities - good, bad, or otherwise! public static string ToXaml (this Activity activity) { // i would use ActivityXamlServices to go from Xaml // to activity, but how to go other way? documentation // is slim, and cannot infer proper usage of // ActivityXamlServices from Xml remarks :S string xaml = string.Empty; return xaml; } Hints, tips, pointers would be welcome :) NOTE: so found this. Will work through and update once working. Anyone wanna beat me to the punch, by all means. Better yet, if you can find a way to be rid of WorkflowDesigner, seems odd it is required.

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Clean Method for a ModelForm in a ModelFormSet made by modelformset_factory

- by Salyangoz

I was wondering if my approach is right or not. Assuming the Restaurant model has only a name. forms.py class BaseRestaurantOpinionForm(forms.ModelForm): opinion = forms.ChoiceField(choices=(('yes', 'yes'), ('no', 'no'), ('meh', 'meh')), required=False, )) class Meta: model = Restaurant fields = ['opinion'] views.py class RestaurantVoteListView(ListView): queryset = Restaurant.objects.all() template_name = "restaurants/list.html" def dispatch(self, request, *args, **kwargs): if request.POST: queryset = self.request.POST.dict() #clean here return HttpResponse(json.dumps(queryset), content_type="application/json") def get_context_data(self, **kwargs): context = super(EligibleRestaurantsListView, self).get_context_data(**kwargs) RestaurantFormSet = modelformset_factory( Restaurant,form=BaseRestaurantOpinionForm ) extra_context = { 'eligible_restaurants' : self.get_eligible_restaurants(), 'forms' : RestaurantFormSet(), } context.update(extra_context) return context Basically I'll be getting 3 voting buttons for each restaurant and then I want to read the votes. I was wondering from where/which clean function do I need to call to get something like: { ('3' : 'yes'), ('2' : 'no') } #{ 'restaurant_id' : 'vote' } This is my second/third question so tell me if I'm being unclear. Thanks.

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svn for eclipse on mac os lion

- by camdaochemgio

I need to use Subversion with Eclipse on Mac Lion. I encounter problem as below I saw: Subclipse in Mac OS Lion In my context: I use Mac OS Line 10.7.2 Eclipse version: 3.7.1 64 bit I install Subversion: Universal Subversion 1.6.17 Binaries for Lion (Mac OS X 10.7) in the page: http://www.open.collab.net/downloads/community/ I install Subclipse by the "Install New Software..." feature of Eclipse with the update link: http://subclipse.tigris.org/update_1.8.x It install Subclipse 1.8.2, JavaHL 1.7.1.1 and some other packages. When I go to menu Preferences/ Team / SVN , it produce error: "Incompatible JavaHL library loaded. 1.7.x or later required." I find to install SVN Kit, so use it instead of JavaHL as the very first link refer (here), but I don't see it in Subclipse package.

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Math Looping Between Min and Max Using Mod?

- by TheDarkIn1978

i'm attempting to build a tiny (or perhaps not so tiny) formula that will contain numbers between a set min and max, but also loop these numbers so they are not clipped if they are outside of the range. so far, this is what i have. min1 = 10 max1 = 90 val1 = 92 //will make 12, which is what i want since it loops formula: min(max(min1,min(val1,max1)),mod(val1,max1)+min1) however, i'd like it to loop the other direction also, so that if val1 is 5, which is -5 outside of min1, it will become 85. another problem i'm running into is that max1 % max1 != max1 as i want it to, since the max is part of the range trying to be clear, here are some examples of desired output based on a range with looping min1 = 10 max1 = 90 ---------------------------------------------- val1 = 30 //within range: stays as 30 val1 = 90 //within range: stays as 90 val1 = -6 //below range: loops to becomes 84 val1 = 98 //above range: loops to becomes 18 i'd like not to resort to using a series of if/else statements, but one would be fine if it's absolutely required. is that even possible?

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Is *not* using the asp.net membership provider a bad idea?

- by EJB

Is it generally a really bad idea to not use the built-in asp.net membership provider? I've always rolled my own for my asp.net apps (public facing), and really have not had any problems in doing so. It works, and seems to avoid a layer of complexity. My needs are pretty basic: once setup, the user must use email address and password to login, if they forget it, it will be emailed back to them (a new one). After setup there is little that needs to be done to each user account, but I do need to store several extra fields with each user (full name, telephone and a few other fields etc). The number of users that required login credentials are small (usually just the administrator and a few backups), and everyone else uses the site unauthenticated. What are the big advantages that I might be missing out on by skipping the asp.net membership provider functionality?

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After MS Access Conversion 97 --> 2002 I get 'Enter Parameter Value' when exitting a form.

- by user270370

Hi, So when I exit a form from my newly converted .mdb it asks to Enter Parameter Value. It goes through (ie if i enter a value, it asks for another) the values required for a query that is run on a List Box on the page. The query has not been changed during the conversion. The values it is getting for the query are from text boxes on the same form. There are a few Requeries in the form (run from VB) so I imagine that it is rerunning again on Exit (although this isnt explicit in the form properties). I'm not quite sure how to go about solving this. Your help would be great. Thanks

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