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• Neural Network Output Grouping 0.5?

  - by Mike

  I tried to write a Neural Network system, but even running through simple AND/OR/NOR type problems, the outputs seem to group around 0.5 (for a bias of -1) and 0.7 (for a bias of 1). It doesn't look exactly "wrong"... The 1,1 in the AND pattern does seem higher than the rest and the 0,0 in the OR looks lower, but they are still all grouped so it's debatable. I was wondering a) if there's some obvious mistake I've made or b) if there's any advice for debugging Neural Nets... seeing as you can't always track back exactly where an answer came from... Thanks! Mike

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• How can I push a new view controller onto a different nav controllers stack and switch to it?

  - by Derek

  I have a Tab Bar Controller created in Interface Builder Within the Tab Bar are 4 Navigation Controllers. Each controller functions separately and perfectly (yay!) What I need to be able to do is a push a view controller onto a different nav controllers stack and switch the focus onto the appropriate tab bar item (so that the user moves sideways (to a different tab) and up (to a new view) at the same time). This is my first time working with a tab bar controller, and while it's been simple to this point, figuring this out is giving me fits. Any tips you can toss my way would be much appreciated.

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• iPhone GameKit Picker Fundamental Connection Issues

  - by Kyle

  Hello.. This is one of the more interesting things I've seen in iPhone development. The following question has nothing to do with code because I'm using an SDK Example from Apple (Tanks example). I have a 3GS iPhone, and a 3G iPhone both showing the GameKit picker screen. Both will eventually show the other phone in range just fine (It does take about 25 seconds, though). If I pick the 3G iPhone with my 3GS, the 3G will get a connection request and a connection can be made. However, it will ABSOLUTELY not work in the vice versa. Both phones have bluetooth switched on, and both phones are running the latest OS version. The simple fact is I'm using the SDK example, and it's just not working for the 3G trying to issue the connection. Is there any way to explain this extremely odd behavior? Thanks alot for reading!

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• problem with codeigniter using odbc database driver

  - by Nir Gavish

  i’ve run into a curious problem with codeigniter's odbc driver. i’m connecting from a linux machine to an MSSQL 2008 machine using FreeTDS. while i get that the ‘num_rows’ function always returns -1, and that is fully a database/driver issue - for some reason when i try to create a -result(), the whole application crashes (error 500, sometimes just a blank page), if i’m lucky, i get an error message informing me that the application died because it tried to allocated 2 terrabytes of memory(!). This happens irregularly, ie: every few refreshes. sometimes it runs fine, sometimes the page returns error 500 and sometimes it gives the memory allocation error - in any case it’s not really something that can be reproduced with percision, and the queries are SUPER simple. ideas anyone?

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• How to pass an input value from a small form into a big form? (PHP, Javascript, URLs)

  - by sarahdopp

  I have a Wordpress website that needs to display a 3rd party newsletter signup form. This sign-up form has lots of fields and takes up its own full page. I want to display a simple "enter email address, hit submit" form at the top of every page. When the user hits submit, it should take them to the full form, where their email address is already pre-populated in the appropriate field. What's a good way to pass the input value from the short form to the long form? I'm inclined to use the URL somehow, but I've never approached it before. (My skills: expert XHTML/CSS. competent with WP theme hacking. comfortable enough with PHP and Javascript to move things around, but not enough to write them from scratch.) Thanks!

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• Why is WPFToolkit DataGrid so slow when binding?

  - by Schneider

  I have a very simple test application where I have two objects, each with a small collection of items. when I select an object I display its collection in a WPFToolkit DataGrid. The problem is there is a noticeable delay, such that if you press up/down keys to toggle selection between objects you can see it can't keep up. Why is the performance so bad? <Window x:Class="SlowGridBinding.MainWindow" xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" xmlns:Controls="clr-namespace:Microsoft.Windows.Controls;assembly=WPFToolkit" Title="MainWindow" Height="350" Width="525"> <StackPanel> <ListBox ItemsSource="{Binding Shops}" DisplayMemberPath="Name" IsSynchronizedWithCurrentItem="True"/> <Controls:DataGrid ItemsSource="{Binding Shops/Vegetables}" AutoGenerateColumns="True"/> </StackPanel> The DataContext is populated with some test classes filled with 50 items of random test data.

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• Windows batch file to delete .svn files and folders

  - by Marco Demaio

  Hi,in order to delete all ".svn" files/folders/subfolders in "myfolder" I use this simple line in a batch file: FOR /R myfolder %%X IN (.svn) DO (RD /S /Q "%%X") This works, but if there are no ".svn" files/folders the batch file shows a warning saying: "The system cannot find the file specified." This warning is very noisy so I was wondering how to make it understand that if it doesn't find any ".svn" files/folders he must skip the RD command. Usually using wild cards would suffice, but in this case I don't know how to use them, because I don't want to delete files/folders with .svn extension, but I want to delete the files/folders named exactly ".svn", so if I do this: FOR /R myfolder %%X IN (*.svn) DO (RD /S /Q "%%X") it would NOT delete files/folders named extaclty ".svn" anymore. I tried also this: FOR /R myfolder %%X IN (.sv*) DO (RD /S /Q "%%X") but it doesn't work either, he deletes nothing. Thanks for any help!

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• how can i make a link in XML

  - by Chi

  I have this flash website that comes with XML. The website is predefined in such a way that when I hoover the mouse cursor over some pictures or text, it will show the pointing hand, thus meaning it's a clickable link. Originally, it would look like so: After I changed the link part, it becomes: However, this seems not to be working (google link is just an example). The pointing hand is still showing, but when I click on it, nothing happens. So my question is quite simple, how do I link in XML (sorry if all this sounded rather stupid, I'm a noob)

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• Filter, sort and paginate in Codeigniter

  - by Babak

  Ive recently started using CodeIgniter as I was searching for a very lightweight framework and it seemed to come up as a top choice. I am new to the whole MVC thing, enjoying it but am stuck with something which seems very simple. I am coding a CMS and need a way to filter, sort and paginate the results. I am used to doing it with querystrings, so I would have something along the lines of: articles.php?order=title&sort=desc&filter=articletitle&page=5 I have no idea how I would go about doing this in CI so I just turned on the EnableQueryStrings in the config and it works fine, but i am getting the feeling its probably not the most elegant solution. I suppose I could have index.php/articles/index/order/title/sort/desc/filter/articletitle/page/5 but to me this seems very inflexible, what if for example i dont need to sort, how would i make sure i am looking at the correct uri segment? any ideas?

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• Regex: replace inner string

  - by AllenG

  I'm working with X12 EDI Files (Specifialy 835s for those of you in Health Care), and I have a particular vendor who's using a non-HIPAA compliant version (3090, I think). The problem is that in a particular segment (PLB- again, for those who care) they're sending a code which is no longer supported by the HIPAA Standard. I need to locate the specific code, and update it with a corrected code. I think a Regex would be best for this, but I'm still very new to Regex, and I'm not sure where to begin. My current methodology is to turn the file into an array of strings, find the array that starts with "PLB", break that into an array of strings, find the code, and change it. As you can guess, that's very verbose code for something which should be (I'd think) fairly simple. Here's a sample of what I'm looking for: ~PLB|1902841224|20100228|49KC15X078001104|.08~ And here's what I want to change it to: ~PLB|1902841224|20100228|CSKC15X078001104|.08~ Any suggestions?

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• WPF Canvas Binding

  - by morsanu

  Hey guys, I'm rather new to WPF, so maybe this is a simple question. I have a class that derives from Canvas, let's call it MyCanvas. And I have a class, MyClass, that has a property of type MyCanvas. In XAML, I built a TabControl, so each TabItem binds to a MyClass object. Now, in the Content of every tab I want to display MyObject.MyCanvas. How should I do that? <TabControl.ContentTemplate> <DataTemplate> <Grid> <myCanvas:MyCanvas Focusable="true" Margin="10" > <Binding Path="Canvas"></Binding> </screenCanvas:ScreenCanvas> </Grid> </DataTemplate> </TabControl.ContentTemplate>

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• fastest calculation of largest prime factor of 512 bit number in python

  - by miraclesoul

  dear all, i am simulating my crypto scheme in python, i am a new user to it. p = 512 bit number and i need to calculate largest prime factor for it, i am looking for two things: Fastest code to process this large prime factorization Code that can take 512 bit of number as input and can handle it. I have seen different implementations in other languages, my whole code is in python and this is last point where i am stuck. So let me know if there is any implementation in python. Kindly explain in simple as i am new user to python sorry for bad english.

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• UIComponent extended class isn't showing UIComponent extended class

  - by Arno

  I have 1 class (that is extending a UIcomponent) that is representing a component. In that component I create different instances of another class that is also a UIComponent but this class doesn't show up in de first class. I see that it is running and that it has the correct hights but I got the feeling that it doesn't show up with this hights. If I trace I see the width and height is 200 X 200 but there is still nothing visible in my component I bet there is a simple solution for this problem?

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• Using glassfish gem (or other webserver) with SSL

  - by Wolfgang

  My goal is to deploy a simple rails application on a windows server using the glassfish gem. I have no trouble getting the glassfish gem to work with regular http, however I now need to add SSL security and I cannot find any links on how to enable https in the glassfish gem. Has anyone succeeded in setting up the glassfish gem to support SSL? Are there any other ways to serve a rails application over SSL on windows without any additional software installation (e.g. IIS, Glassfish, jBoss)?

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• PrestaShop vs. Shopify

  - by Zach L.

  I have seen several Questions comparing different ECommerce CMS's: Prestashop compared to Zen-Cart and osCommerce Magento or Prestashop, which is better? Best php/ruby/python e-commerce solution I was hoping to get some people to weigh in with which they prefer for a relatively small E-shop. I am now primarily looking at PrestaShop and Shopify. I really like that Shopify does the hosting, has quality service, and is simple to understand and theme. However PrestaShop is free and seems to be able to do just as much if not more than Shopify. I have decided that Magento is too clunky for the project, and have read that many other solutions (osCommerce, ZenCart, OpenCart) are outdated, buggy, or just inferior. Thank you!

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• Homoscedascity test for Two-Way ANOVA

  - by aL3xa

  I've been using var.test and bartlett.test to check basic ANOVA assumptions, among others, homoscedascity (homogeniety, equality of variances). Procedure is quite simple for One-Way ANOVA: bartlett.test(x ~ g) # where x is numeric, and g is a factor var.test(x ~ g) But, for 2x2 tables, i.e. Two-Way ANOVA's, I want to do something like this: bartlett.test(x ~ c(g1, g2)) # or with list; see latter: var.test(x ~ list(g1, g2)) Of course, ANOVA assumptions can be checked with graphical procedures, but what about "an arithmetic option"? Is that, at all, manageable? How do you test homoscedascity in Two-Way ANOVA?

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• Homoscedascity test for Two-Way ANOVA

  - by aL3xa

  I've been using var.test and bartlett.test to check basic ANOVA assumptions, among others, homoscedascity (homogeniety, equality of variances). Procedure is quite simple for One-Way ANOVA: bartlett.test(x ~ g) # where x is numeric, and g is a factor var.test(x ~ g) But, for 2x2 tables, i.e. Two-Way ANOVA's, I want to do something like this: bartlett.test(x ~ c(g1, g2)) # or with list; see latter: var.test(x ~ list(g1, g2)) Of course, ANOVA assumptions can be checked with graphical procedures, but what about "an arithmetic option"? Is that manageable? How do you test homoscedascity in Two-Way ANOVA?

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• Core Data grouping data in table

  - by OscarTheGrouch

  I am using core data trying to create a simple database app, I have an entity called "Game" which has a "creator". I have basically used the iPhone table view template and replaced the names. I have the games listed by creator. Currently the tableview looks like this... Chris Ryder Chris Ryder Chris Ryder Chris Ryder Dan Grimaldi Dan Grimaldi Dan Grimaldi Scott Ricardo Tim Thermos Tim Thermos I am trying to group the tableview, so that each creator has only one cell in the tableview and is listed once and only once like this... Chris Ryder Dan Grimaldi Scott Ricardo Tim Thermos any help or suggestions would be greatly appreciated.

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• Best way to display a list of events by month

  - by EmmyS

  I have a mySQL table of events and want to display them in a list using PHP. Pretty simple, except I only want to display the month name once, for example: May 2010 12th, 7 pm. Event 1 - event one description 15th, 5:30 pm. Event 2 - event two description June 2010 9th, 7 pm. Event 1 - event one description 11th, 5:30 pm. Event 2 - event two description I'm very new at SQL and PHP. I can think of one way to do it. It would involve selecting all records grouped by date, then looping through all records, comparing the month/year value each time and the first time the month/year doesn't match, print a new header row to my HTML table. I can't believe it's the best or most efficient way to go. Any ideas for a newbie? I'm sure my way would work, but it's inelegant at best, and processor-intensive at worst.

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• How to run the servlet program in netbeans IDE?

  - by Venkats

  I am new to java servlets. I learning from the basic. I have a simple servlet program, but i don't know how to run it. import java.io.*; import javax.servlet.*; import javax.servlet.http.*; public class HelloWorld extends HttpServlet { public void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { PrintWriter out = response.getWriter(); out.println("Hello World"); } } How can run the above program in netbeans. I am using the netbeans6.8. Whats are the procedures which i have to follow? Thanks in Advance.

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• SQL's Rownumber with Linq-to-entities

  - by mariki

  I am converting my project to use EF and also want to covert stored procedures into Linq-to-entities queries. This my SQL query (simple version) that I have trouble to convert: SELECT CategoryID, Title as CategoryTitle,Description, LastProductTitle,LastProductAddedDate FROM ( SELECT C.CategoryID, C.Title,C.Description, C.Section, P.Title as LastProductTitle, P.AddedDate as LastProductAddedDate, ROW_NUMBER() OVER (PARTITION BY P.CategoryID ORDER BY P.AddedDate DESC) AS Num FROM Categories C LEFT JOIN Products P ON P.CategoryID = C.CategoryID ) OuterSelect WHERE OuterSelect.Num = 1 In words: I want to return all Categories (from Categories table) and title and date of addition of the product (from Products table) that was added last to this category. How can I achieve this using Entity frame work query? In most efficient way.

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• Force WPF to Commit Changes on Focused Element

  - by John L.

  I'm working with VS2010, WPF and EF. I've placed controls on my window by dragging an entity out of the Data Sources toolwindow. I used the "details" setting so my entity is represented by several labels and textboxes. I've also added a button with the following code: _context.SaveChanges(); When I'm editing data, the changes in whichever textbox has focus are not committed back to the DB. Everything else commits just fine. If I shift focus to another element prior to hitting the save button, it commits as well. I've experienced the same thing with the DataGrid. I know I'm missing something simple, but I can figure it out. Any ideas on what I'm missing? Thanks!

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• Where is PostSharp.Public 1.5 DLL ?

  - by jfneis

  Fellows, I'm going crazy with looks like a really stupid problem. I'm trying to build a simple example using PostSharp as a log AOP utility. I've not installed PostSharp, and I don't want to, I want to reference the necessaries DLLs, change my .csproj and see everything working. Change the project and add references was kind of easy, byt just after adding the LogAttribute to a method I got two errors: Error 1 'Log4PostSharp.LogAttribute' is not an attribute class C:\Dev\LogWithPostsharp\LogWithPostsharpCmd\Program.cs 17 10 LogWithPostsharpCmd Error 2 The type 'PostSharp.Extensibility.MulticastAttribute' is defined in an assembly that is not referenced. You must add a reference to assembly 'PostSharp.Public, Version=1.5.0.0, Culture=neutral, PublicKeyToken=b13fd38b8f9c99d7'. C:\Dev\LogWithPostsharp\LogWithPostsharpCmd\Program.cs 18 22 LogWithPostsharpCmd The first error really looks like consequence of the second, but here is the deal: the PostSharp.Public.* simply doesn't exist in the downloaded .zip. Is there something that I'm not getting? Thank you in advance. Filipe

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• How to format float to 2 decimals in objective C

  - by iamdadude

  I have a string that I'm converting to a float that I want to check for values in an if statement. The original float value is the iPhone's trueHeading that is returned from the didUpdateHeading method. When I convert the original float to a string using @"%.2f" it works perfectly, but what I'm trying to do is convert the original float number to the same value. IF I just convert the string to [string floatValue] I get the same original float number, and I don't want that. To make it short and simple, how do I take an existing float value and just get the first 2 decimals?

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• Android ConnectivityManager information

  - by Mike

  I am trying to get a better grip on Android's ConnectivityManager and how it really works under the hood. Using the API is simple enough but I am looking for something lower level such as when it starts and the dirty details of what its doing in the background. I can't seem to find a good resource about it. Everything is just about using the API. Does anyone understand this or have any resources that they could point me to, website, book, white paper, or otherwise? I would really appreciate it. Thanks

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