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• Is Haskell "mainstream", or is it mainly used by hobbyists and academics?

  - by Asher

  I came across a post where someone wrote something inaccurate about Haskell (won't go into it) and he got flammed for it. Which (pleasantly) surprised me. About 3 years ago I read this joke about Haskell: All the haskell programmers in the world can fit into a 747 and if that plane were to crash no one would care... or something along those lines. Which brings me to my question: how healthy is the Haskell community, anyway? Is Haskell "mainstream"? Is it mainly used by hobbiest and academics or someone making some serious money from it (which is the true yardstick of how good a language is - just kidding, geez!)?

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• create an english test

  - by thienthai

  hi everyone, i want to create an english test software using window form and C# something like bellow: Hi David, Thanks for your e-mail. I hope things get easier for you before the weekend. You’ve been (be) really busy this week! 1 _______ (you / make) your vacation plans yet? Last May, I 2 _________(go) to Japan with my family again. We 3 _______ (be) there three times now! But this time, we 4 _______ (not stay) with my aunt in Tokyo. Instead, we 5 ______(drive) around to different places. Then in July, my friend Angie and I 6 ________ (travel) to Peru. 7 _______ (you / ever / be) there? It’s one of the most interesting places I 8 _______ (ever / visit). The ruins of Machu Picchu are amazing. Write soon! Mariko how can i display it in window form that we can fill the brackets (____) directly everyone help me thanks.

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• PHP/MySQL User system w/ groups.

  - by Ben C

  I have a user system set up in a 'users' table, and I have groups set up in a 'groups' table. Essentially, I want users to be able to join any and all the groups that they want, in the same was as one would on facebook. How would one go about structuring this in a mysql/php database system? Just a quick summary would be helpful! I've looked around, but I can only find info on creating 'groups' where the users just have a sort of 1, 2 or 3 permission rank. Thanks!

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• Redirect Output of Capistrano

  - by Eric Lubow

  I have a Capistrano deploy file (Capfile) that is rather large, contains a few namespaces and generally has a lot of information already in it. My ultimate goal is, using the Tinder gem, paste the output of the entire deployment into Campfire. I have Tinder setup properly already. I looked into using the Capistrano capture method, but that only works for the first host. Additionally that would be a lot of work to go through and add something like: output << capture 'foocommand' Specifically, I am looking to capture the output of any deployment from that file into a variable (in addition to putting it to STDOUT so I can see it), then pass that output in the variable into a function called notify_campfire. Since the notify_campfire function is getting called at the end of a task (every task regardless of the namespace), it should have the task name available to it and the output (which is stored in that output variable). Any thoughts on how to accomplish this would be greatly appreciated.

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• I have a problem sometimes in my vb.net webmail application?

  - by ahmed

  I have a weird problem in my vb.net web application sometimes. webmail webform with html editor, sometimes very rare users type for example more than 200 or 400 characters and send the message to other user. But the reciever only recieves 5 or 7 characters. 2 or 3 words of the message. I don know what is going on. I checked the code, no bugs everything is working fine.All the users are on Microsoft XPsp2 platform. Any help will be appreciated. Is this sufficient , or shall I provide any more input regarding the problem...?? OK I got it... the problem is when I type characters in HtmlEditor it keeps on continuing, i mean it should go to the end and automatically comes to the second line....but it is going on and on.how can I stop this.

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• connect tableView + tableView

  - by totato

  Right now I have an indexed tableview that goes to a detail view but i want it to go to another tableview then a detail view. my code like this: ` - (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath { displyAnnController *anController = [[displyAnnController alloc] initWithNibName:@"AnnView" bundle:[NSBundle mainBundle]]; DetailViewController *dvController = [[DetailViewController alloc] initWithStyle:UITableViewStyleGrouped]; switch (indexPath.row) { case 0: [self.navigationController pushViewController:anController animated:YES]; [anController release]; anController = nil; break; case 1: [self.navigationController pushViewController:dvController animated:YES]; [dvController release]; dvController = nil; break; default: break; }` and when I press the cell with index 0 in the simulator, the program is crash! what's the problem? pleas help me ..

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• Rotation Interpolation

  - by Rob

  Hello, NB: I'll present this question in degrees purely for simplicity, radians, degrees, different zero-bearing, the problem is essentially the same. Does anyone have any ideas on the code behind rotational interpolation? Given a linear interpolation function: Lerp(from, to, amount), where amount is 0...1 which returns a value between from and to, by amount. How could I apply this same function to a rotational interpolation between 0 and 360 degrees? Given that degrees should not be returned outside 0 and 360. Given this unit circle for degrees: where from = 45 and to = 315, the algorithm should take the shortest path to the angle, i.e. it should go through zero, to 360 and then to 315 - and not all the way round 90, 180, 270 to 315. Is there a nice way to achieve this? Or is it going to just be a horrid mess of if() blocks? Am I missing some well understood standard way of doing this? Any help would be appreciated.

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• Between a jsf page and a managed bean, why the getter method is called twice

  - by Bariscan

  Hi, I have a jsf page with a form has an outputtext in it. The value of outputtext component is called from a backing bean (or managed bean). I know when I code it as #{MyBean.myString} Jsf rename it and calls getMyString() method. However the wierd thing is, when I put a breakpoint to the getter method of this component, I see it is called twice during the page is being rendered. The outputtext is in a h:form, and it is the only component wich is bind to a backingbean. I mean, it is so wierd that jsf should get the value when it first come to the getter method, however it needs to go to the getter method twice. Can you explain what is the reason of this behaviour in jsf? Any help would be appreciated, Best wishes, Baris

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• Software-related but not programming-specific questions

  - by jayrdub

  I have often fought the urge to ask questions that I know aren't appropriate on SO, because I personally haven't come across another online group who's opinions I would trust as much. What sites do you frequent that you have found good participation from a smart group of people where you can ask questions that are related to software, but not programming problems? This community also has a vast depth of knowledge about things related to software like marketing, graphics/UI, running a small business, working in bad jobs, etc. that would greatly benefit everyone else. Where do we go to tap all that knowledge? On stackoverflow.uservoice.com there is a popular suggested feature to sanction, or add to SO, a place to hold discussions that aren't about specific programming questions. It seems that the suggestion has been denied in the past though.

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• Daemon with Clojure/JVM

  - by Isaac Copper

  I'd like to have a small (not doing too damn much) daemon running on a little server, watching a directory for new files being added to it (and any directories in the main one), and calling another Clojure program to deal with that new file. Ideally, each file would be added to a queue (a list represented by a ref in Clojure?) and the main process would take care of those files in the queue on a FIFO basis. My question is: is having a JVM up running this little program all the time too much a resource hog? And do you have any suggestions as to how go about doing this? Thank you very much!

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• ER Diagram flaws

  - by spacker_lechuck

  I have the following ER Diagram for a bank database - customers may have several accounts, accounts may be held jointly by several customers, and each customer is associated with an account set and accounts are members of one or more account sets. What design rules are violated? What modifications should be made and why? So far, a few flaws I'm not sure about are: 1) Redundant owner-address attribute in AcctSets Entity. 2) This ER does not include accounts with multiple owners with different addresses. My Question is: How would I go about fixing these flaws and/or other flaws that I may be missing from my analysis? Thanks!

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• Xcode, changing applications subfolder?

  - by fuzzygoat

  Hi have noticed today whilst writing a simple iPhone app that Xcode sometimes starts a new folder in applications, whilst your still working on the same app. /Users/Fuzzygoat/Library/Application Support/iPhone Simulator/User/Applications/4E5EF4F0-F410-46A6-888C-0D23BB97D2DC Does anyone know what causes Xcode to swap to a new app folder (i.e. the one named "4E5EF4F0-F410-46A6-888C-0D23BB97D2DC") EDIT_001: One thing I have noticed is that I have been doing a lot of quitting an application and restarting to check a set of archive methods, and that does tend to confuse it sometimes. A couple of times it has not found saved data, I guess this is just a side effect of constantly running the simulator over and over via Xcode. Things seem to go just fine if I test on the Simulator without Xcode, for a start the folder keeps the same name. NB: I am using NSSearchPathForDirectoriesInDomains to get the documents folder each time. gary

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• Webfaction: How do I run a Static/Perl app and Django app under the same website

  - by swisstony

  I have an existing Perl app that I'm moving to a Webfaction website. I will be adding Django apps to this Webfaction website too. I would like the Django app to get first call and so would want its URL path to be / This would allow me to add any new URLs to the urls.py I wish as my app grows. If the URL doesn't match anything in the urls.py I would like it to get passed to the static Perl app. For example /app1 - Django /app2 - Django Everything else not picked up by urls.py I would want going to my Perl app For example: /index.html - Static/Perl app /about.html - Static/Perl app /contact.html - Static/Perl app /apps/perlapp1.cgi - Static/Perl app etc How do I go about achieving this in Webfaction?

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• Recommendation for web-based database visualization tool

  - by prometheus

  Tableau is extremely flexible when it comes to visualizing and playing around with datasets, but it is extremely slow when you go into "production mode" and publish a particular view that you've created onto your server. Does anyone know of any tools that can be used to connect to a database, present interactive (or somewhat interactive) dashboards, and perform reasonably well when published to a server? To be clearer, I am looking for something like this -- http://www.corda.com/executive-dashboard-graph-styles.php. I realize that such a product might not exist. If so, is there a particular framework or library that I could use to create killer interactive visualizations of data for the web?

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• Newbie: UINavigationController is pulling me back from further learning :(

  - by nithin

  I have created a window-based application and my problem is I am unable to create UINavigationController on the go. InFact I don't know how to do that. My AppDelegeate - (void)applicationDidFinishLaunching:(UIApplication *)application { // Override point for customization after application launch [window addSubview:logInView.view]; [window makeKeyAndVisible]; } here the logInView is an object of @interface LogInViewController : UIViewController { IBOutlet UITextField *usernameField; IBOutlet UITextField *passwordField; IBOutlet UIButton *logInButton; } -(IBAction) logInClick:(id) sender; from the click action of this loginviewcontroller It should be showing the home screen with navigation controller. and I have to add many subviews. My question is where should I init the UINavigationController and where could I write the codes for adding subviews? how to map it with interfacebuilder?

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• When to use MVP in Windows Forms .net application?

  - by Janalopa

  I am familiar with MVC/MVP though my question is simple, I'm about to program a simple Instant Messaging software when the engine and communication part is an open API. so my software will have about 3 forms, a splash screen with login details, the options form and a main form with all the functionality like: Friends List, Send message, Received messages (tabbed), search user, etc. In UI perspective, its important for the GUI to be in 1 form in my application. So my question is, for the only complicated form that I'm going to have, is it necessary to implement an MVP design pattern or in this case its better to just go straight forward and put all the logic in 1 place? THANKS Janalopa!

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• AVDs that exist do not get listed in the "Target Tab"

  - by Abhi

  I am using emulator Android 2.1 with Eclipse. For few days I had the emulator working ... was able to debug... I had 2 AVDs created and was using one of them. Earlier today I had to move my classes to a different package. Ever since I did that the configuration that I had has disappeared . So now I had to create configuration - I select Android Application and then click New - gave it a name TestPrjCfg - when I go to the "Target" tab - I see "No AVD available" but when I click manager I see two AVDs listed. I tired refresh in the "Target" tab - the existing AVDs do not show up. I used the Manager and created a third AVD that did not help either. Please let me know what am I missing here? What should I do so that the existing AVDs showup in the "Target" tab- Thank you for the time and effort abhi

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• iPhone: UITableView Becomes Invisible after Changing the Data it Displays

  - by Alexander Shemshurenko

  Hi I have application with a TabBar that controls several views. In one view, I control connections to different servers. Each server provides a different set of items. I display these items in UITableView on another view. The problem is that the tableview displays OK the first time but if I go back to view number one and change the server, thereby changing the list of items that should be displayed in tableview, the tableview becomes invisible for some reason. If I tap on the screen in the place where it should be, it becomes visible again. I create table view like this UITableView * aTableView = [[UITableView alloc] initWithFrame:CGRectMake(X,Y,Width,Height) style:UITableViewStyleGrouped]; [[self view] addSubview:aTableView]; aTableView.dataSource = self; Ive tried to call reloadData and setNeedsDisplay in viewWillAppear of the UIViewController that hosts this tableview but without success. Any advice? Thanks

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• Changing the colour of Aero glass for my window?

  - by Roger Lipscombe

  I'm using DwmExtendFrameIntoClientArea in my WPF application to get the glass effect. This is working fine. What I'd like to do is change the colour used for the glass -- I'm writing a countdown timer, and I'd like the window to be the normal glass colour most of the time, and then to go red (but still with glass) when the time runs out. I found this question, which talks about how to apply a gradient glass, and that works fine when picking a different colour. Unfortunately, the borders are not coloured appropriately. When I turn off the borders by using ResizeMode="NoResize", then I end up with square corners. I'd like to keep the rounded corners. I looked at creating an irregularly-shaped window, by using AllowTransparency="True" and that works fine, but doesn't look like an Aero glass window. It looks a bit flat. So: my question: how do I create a window in WPF that looks like Aero glass transparency, but uses a different colour?

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• Does it take time to deallocate memory?

  - by jm1234567890

  I have a C++ program which, during execution, will allocate about 3-8Gb of memory to store a hash table (I use tr1/unordered_map) and various other data structures. However, at the end of execution, there will be a long pause before returning to shell. For example, at the very end of my main function I have std::cout << "End of execution" << endl; But the execution of my program will go something like $ ./program do stuff... End of execution [long pause of maybe 2 min] $ -- returns to shell Is this expected behavior or am I doing something wrong? I'm guessing that the program is deallocating the memory at the end. But, commercial applications which use large amounts of memory (such as photoshop) do not exhibit this pause when you close the application. Please advise :)

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• Calling a method in a view controller from a view

  - by Lakshmie

  I have to invoke a method present in a view controller who's reference is available in the view. When I try to call the method like any other method, for some reason, iPhone just ignores the call. Can somebody explain as to why this happens and also how can I go about invoking this method? In the view I have this method: -(void) touchesBegan :(NSSet *) touches withEvent:(UIEvent *)event{ NSArray* mySubViews = [self subviews]; for (UITouch *touch in touches) { int i = 0; for(; i<[mySubViews count]; i++){ if(CGRectContainsPoint([[mySubViews objectAtIndex:i] frame], [touch locationInView:self])){ break; } } if(i<[mySubViews count]){ // viewController is the reference to the View Controller. [viewController pointToSummary:[touch locationInView:self].y]; NSLog(@"Helloooooo"); break; } } } Whenever the touches event is triggered, Hellooooo gets printed in the console but the method before that is simply ignored

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• STI and polymorphs

  - by Alexey Poimtsev

  Hi, I have problem with my code class Post < ActiveRecord::Base end class NewsArticle < Post has_many :comments, :as => :commentable, :dependent => :destroy, :order => 'created_at' end class Comment < ActiveRecord::Base belongs_to :commentable, :polymorphic => true, :counter_cache => true end And on attempt go get comments for some NewsArticle i see in logs something like Comment Load (0.9ms) SELECT "comments".* FROM "comments" WHERE ("comments"."commentable_id" = 1 and "comments"."commentable_type" = 'Post') ORDER BY created_at Strange that "commentable_type" = 'Post'. What's wrong? PS: Rails 2.3.5 && ruby 1.8.7 (2010-01-10 patchlevel 249) [i686-darwin10]

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• Facebox adding commas to input

  - by Ed Woodcock

  I'm using a facebox to display a form inside a lightbox, nothing too exciting (just a couple of datepickers, some textboxes and a checkbox). However, I'm having issues with the postbacks, whenever I post back from the facebox it adds a ',' to the start of the input (so "rabbit" becomes ",rabbit") Now, I saw that there was the same issue with the modalpopup extender from the ajaxcontroltoolkit, so I assume it's a common issue. Can anyone either explain why this is happening, or tell me how to fix it? provide a decent way of fixing this? I have actually done it, and it works very nicely, but I don't really want to answer my own bounty question so someone else give it a go! Cheers, Ed EDIT See attached answer for a correct solution (I fixed this eventually but didn't want to ruin the bounty question so left the answer until afterwards).

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• problem with facebook api - Keeps redirecting

  - by Megan

  I created an application with a name and connect URL on facebook. I put below code in test.php here (test.php): include_once 'facebook.php'; $fb = new Facebook('api_key', 'secret'); $user = $fb->require_login(); echo $fb->api_client->user; echo $fb->api_client->session_key; when I go to that page, it takes me to facebook login, after I login it redirects me to same test.php with an auth_token. But it doesn't stop there. For some reason, the script is taking me to facebook again and since I already logged in facebook redirecting me to test.php with another auth_token just like below /test.php?auth_token=76a6eb21b872cdfe787ea85a240905dd&auth_token=597d7532bf53c8ce37cc003bcf7d2905 It never stops there, test.php taking me to facebook again and again :( Please tell me what wrong?? Thanks a lot

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• Multiple JS effects on one event

  - by Cylindric

  I've got a bunch of Ajax links in a menu that reload a div called #ajaxupdatediv. I want to display another div while that's loading the new content, so how would I fire off both effects? <div id="#ajaxupdatediv"> Content will go here </div> <div id="ajaxloadingdiv"> ...Loading... </div> Here's a bit of the PHP array( 'update' => '#ajaxupdatediv', 'before' => $this->Js->get('#ajaxupdatediv')->effect('fadeOut'), 'complete' => $this->Js->get('#ajaxupdatediv')->effect('fadeIn'), )

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