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• Pixel Shader Effect Examples

  - by Chris Nicol

  I've seen a number of pixel-shader effect examples, stuff like swirl on an image. But I'm wondering if anyone knows of any examples or tutorials for more practical uses of shader effects? I'm not saying that a swirl effect doesn't have it's uses, it's just that many of the examples I've found have the basic effect explained and don't go into how it might be used subtly with another effect or transition to produce a wonderful effect. There's a video here, that outlines all the WPF Effects Library, but I'm not sure how I would use some of them in a practical context. For example, when Flash 8 came out with effects like blur, I found a wonderful video that showed how to use the blur effect to create a cool effect with speeding text, that video inspired many ideas of what I could do with the effects in Flash 8. I'm looking for something similar with Pixel Shader Effects.

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• Java enums: Gathering info from another enums

  - by Samuel Carrijo

  I made a similar question a few days ago, but now I have new requirements, and new challenges =). As usual, I'm using the animal enums for didactic purposes, once I don't want to explain domain-specific stuff I have a basic enum of animals, which is used by the whole zoo (I can add stuff to it, but must keep compatibility): public enum Animal { DOG, ELEPHANT, WHALE, SHRIMP, BIRD, GIRAFFE; } I need to categorize them in a few, non-related categories, like gray animals (whale (my whale is gray) and elephant), small animals (bird, shrimp and dog), sea animals (whale and shrimp). I could, as suggested in my previous questions, add a lot of booleans, like isGray, isSmall and isFromSea, but I'd like an approach where I could keep this somewhere else (so my enum doesn't need to know much). Something like: public enum Animal { DOG, ELEPHANT, WHALE, SHRIMP, BIRD, GIRAFFE; public boolean isGray() { // What comes here? } } Somewhere else public enum GrayAnimal { WHALE, ELEPHANT; } How is this possible? Am I requesting too much from Java?

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• How to change the datasource on a YUI datagrid after creation

  - by Simon

  I am using the Yahoo DataTable for which the API is here. I am having difficulty changing the data once I have rendered the grid once. I am using jQuery to get data via AJAX, or from a client side data island and need to put this back into the grid. There is no setDataSource method in the DataTable API, and changing 'dataSource.liveData' does not update the grid. // does not work dataTable.dataSource.liveData = [ {name:"cat"}, {name:"dog"}, {name:"mouse"}; The example I am basing my code on is the basic LocalDataSource example. How can I update the data source without having to completely recreate the table. I do NOT want to use the YUI datasources that make Async calls. I need to know how I can do this 'manually'.

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• Linq To Objects Auto Increment Number

  - by Nathan

  This feels like a completely basic question, but, for the life of me, I can't seem to work out an elegant solution. Basically, I am doing a Linq Query creating a new object from the query. In the new object, I want to generate a auto-incremented number to allow me to keep a selection order for later use (named Iter in my example). Here is my current solution that does what I am needing: Dim query2 = From x As DictionaryEntry In MasterCalendarInstance _ Order By x.Key _ Select New With {.CalendarId = x.Key, .Iter = 0} For i = 0 To query2.Count - 1 query2(i).Iter = i Next Is there a way to do this within the context of the linq query (so that I don't have to loop the collection after the query)? Thanks!

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• Comparison of the multiprocessing module and pyro?

  - by fivebells

  I use pyro for basic management of parallel jobs on a compute cluster. I just moved to a cluster where I will be responsible for using all the cores on each compute node. (On previous clusters, each core has been a separate node.) The python multiprocessing module seems like a good fit for this. I notice it can also be used for remote-process communication. If anyone has used both frameworks for remote-process communication, I'd be grateful to hear how they stack up against each other. The obvious benefit of the multiprocessing module is that it's built-in from 2.6. Apart from that, it's hard for me to tell which is better.

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• How do I use ffmpeg with live streaming from an IP camera

  - by Murali Hariharan

  My question is very basic because I am a newbie to all these technologies. I have an IP camera connected to my internal network. - "http://192.168.1.20/videostream.cgi?user=admin&pwd=" gives a live streaming view in Firefox or Internet Explorer. Now I want to record the live stream into a video. The parameters to be supplied are begin_time, end_time, format of video etc. How do I accomplish this? I appreciate any guidance. Thanks Murali

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• Getting BeautifulSoup to find a specific <p>

  - by Ryan

  I'm trying to put together a basic HTML scraper for a variety of scientific journal websites, specifically trying to get the abstract or introductory paragraph. The current journal I'm working on is Nature, and the article I've been using as my sample can be seen at http://www.nature.com/nature/journal/v463/n7284/abs/nature08715.html. I can't get the abstract out of that page, however. I'm searching for everything between the <p class="lead">...</p> tags, but I can't seem to figure out how to isolate them. I thought it would be something simple like from BeautifulSoup import BeautifulSoup import re import urllib2 address="http://www.nature.com/nature/journal/v463/n7284/full/nature08715.html" html = urllib2.urlopen(address).read() soup = BeautifulSoup(html) abstract = soup.find('p', attrs={'class' : 'lead'}) print abstract Using Python 2.5, BeautifulSoup 3.0.8, running this returns 'None'. I have no option of using anything else that needs to be compiled/installed (like lxml). Is BeautifulSoup confused, or am I?

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• Where is the WPF Numeric UpDown control?

  - by AngryHacker

  Getting into the first serious WPF project. It seems like there are a lot of basic controls flat out missing. Specifically, I am looking for the Numeric UpDown control. Was there an out of band release that I missed? Really don't feel like writing my own control. I do not want to use the WindowsFormHost and plop a WinForm ctl on it. I want it to be fully WPF without any legacy junk. Thanks

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• Java Compare Two Lists

  - by agazerboy

  Hi All, Thanks for stoping to help me :) I have a question, may be for some of you, it will be a basic question :) I have two lists ( not java lists, you can say two columns) For example **List 1** **Lists 2** milan hafil dingo iga elpha binga hafil mike meat dingo iga neeta.peeta What I want ! I want that it returns me that how many elements are same. For this example it should be 3 and it should return me similar values of both list and different values too. Should I use hashmap if yes then what method to get my result? Please help P.S: It is not a school assignment :) So if you just guide me it will be enough

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• What is the difference between DVCS systems?

  - by Stephen

  What is the difference between DVCS systems? Seriously, wikipedia doesn't cover it well, and I read an article on HN recently comparing git and bzr in some detail, but the author admitted knowing little about mercurial, and the other options didn't get mentioned. (I'm happily using fossil on small win/mac/Linux projects) Please restrict answers to the DVCS aspects of the tool, e.g. The basic unit of vc in hit is the repository- in bazaar it is the branch(http://unspecified.wordpress.com/2010/03/26/why-git-aint-better-than-x/). bugtrackers and wikis are nice, but I'm really interested in the tools themselves, rather than any extras. Unfortunately SO demands a single 'right answer', so I'm making the question community wiki in the hope that users will contribute their knowledge.

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• Isapi Rewrite : Remove filename from URL

  - by namtax

  Hi there Im am trying to use the isapi rewrite tool on my web domain to write some basic rules, but am getting a bit confused. My base url is http://forevr-dev.co.uk/musicexplained/index.cfm and every page on the site follows from this base url. For example http://forevr-dev.co.uk/musicexplained/index.cfm/artist/blondie would be the artist page for blondie.. What I am looking for, is a rewrite rule, that would remove the index.cfm from the url, instead leaving http://forevr-dev.co.uk/musicexplained/artist/blondie. I have put the httpd.ini file in my musicexplained folder, under the root of my forevr-dev.co.uk domain, and I am using the following code below, which I used from the coldbox coldfusion framework application examples. RewriteEngine On RepeatLimit 0 RewriteCond %{REQUEST_FILENAME} !-f RewriteCond %{REQUEST_FILENAME} !-d RewriteRule ^(.*)$ index.cfm/%{REQUEST_URI} [QSA,L] However, when I now go to the new pretty url, I am recieving an error message saying that the page cannot be found, alongside a 404 message. Any ideas? Thanks

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• PHP Filter, how to filter input array

  - by esryl

  I am using PHP filter to perfom basic sanitization and validation of form data. The principle problem I am having is that I mark my form up so that all the data is in one array for the POST input. e.g. form fields, page[name], page[slug], page[body], page[status], etc. Using the following: filter_input(INPUT_POST, 'page[name]', FILTER_SANITIZE_STRING); OR filter_input(INPUT_POST, "page['name']", FILTER_SANITIZE_STRING); I am unable to access the variable. Can someone please tell me the correct name to use to access array data using filter_input()

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• STORE KIT - Cannot connect to iTunes Store

  - by dassenno

  Hi, this is my situation: a) I have an app of which i want to add in app purchase. I created an update version of the app. I uploaded a binary and rejected. b) On the provisioning portal i created an app-id with unique id ( not wildchard * ) like: com.mycompanyname.myappintheoryblablabla c) I created a new provisioning profile based on the above app-id d) i installed via xcode the prov profile on the development device and set in the app this profile in the field "code signing identity" e) On itunes connect i created 2 item for the in app purchase and set ad "clear for sale" f) in the application code i implemened the basic calls taken from the Apple sample what i am getting is ( as stated in the subject ) CANNOT CONNECT TO ITUNES STORE. Any clue? Can anyone help me? Regards

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• Good projects to learn OCaml and F#

  - by Yin Zhu

  After learning the basic syntax, reading some non-trivial code is a fast way to learn a language. We can also learn how to design a library/software during reading others' code. I have following lists. A Chess program in OCaml by Tomek Czajka. Hal Daumé has written several machine learning libraries in Ocaml. Including decision trees, logistic regression and SVM. All of them are near-production-quality code. A Chess Game Analysis program in F# in Microsoft Research. The above three are my favorites. Will you suggest some other sources? General purpose open source software are good, specialized open source like the three I list here are even more welcome.

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• Silverlight File download from client

  - by luke

  I have a Silverlight application that implements some basic CRUD operations on a fairly flat data set. The application loads all the data onto the client to allow for quick editing (this is a fairly small data set no more that a couple K). I would like to allow them to download the file as a CSV so they can edit the data locally. I know i can set up a HyperLink button to a URL on my webserver and then server the data dynamically using a custom server handler. But this seems kind of roundabout to me because the all the data is already all on the Client's machine (because the Silverlight application loaded it). So i was wondering if there was a way to prompt the user for a file download and then dynamically generate the file download stream from Silverlight?

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• Integrating my website with BlogEngine.Net

  - by Kabeer

  Hello. I am developing a site (ASP.Net based) that, besides other features enables the users to blog as well. I am thinking of integrating BlogEngine.Net to my portal. From whatever little I have analyzed, integrating at presentation layer will be far more challenging in comparison to doing so at business layer. That means (I guess) I will have to use the BlogEngine.Core.dll in my application. I am looking for some sort of approval from the community, complimented with suggested do's and dont's. BTW, I find the business layer a bit intimidating (complex) as I want some basic & necessary features only.

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• Implementation of ceil function in C.

  - by RBA

  Hi, I have two doubts regarding ceil function.. 1. The ceil() function is implemented in C. if i use ceil(3/2), it works fine.. But when i use ceil(count/2)-if value of count is 3, then it gives compile time error.. /tmp/ccA4Yj7p.o(.text+0x364): In function FrontBackSplit': : undefined reference toceil' collect2: ld returned 1 exit status How to use the ceil function in second case?? Please suggest.. 2. How can i implement my own ceil function in C. Please give some basic guidelines. Thanks.

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• Brute force characters into a textbox in c#

  - by Fred Dunly

  Hey everyone, I am VERY new to programming and the only language I know is C# So I will have to stick with that... I want to make a program that "test passwords" to see how long they would take to break with a basic brute force attack. So what I did was make 2 text boxes. (textbox1 and textbox2) and wrote the program so if the text boxes had the input, a "correct password" label would appear, but i want to write the program so that textbox2 will run a brute force algorithm in it, and when it comes across the correct password, it will stop. I REALLY need help, and if you could just post my attached code with the correct additives in it that would be great. The program so far is extremely simple, but I am very new to this, so. Thanks in advance. private void textBox2_TextChanged(object sender, EventArgs e) { } private void button1_Click(object sender, EventArgs e) { if (textBox2.Text == textBox1.Text) { label1.Text = "Password Correct"; } else { label1.Text = "Password Wrong"; } } private void label1_Click(object sender, EventArgs e) { } } } `

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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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• How to structure VB.NET windows forms applications

  - by Jon

  What is the best way to structure a VB.NET windows forms application so that code can be reused and the app can be extended easily. I used to create lots of new forms. This lead to lots of repeated code and forms which did similar things. Now, for forms which do similar jobs, such as view/edit/delete items from a specific db table, I create a form with the required controls, have the form create an instance of a class with params such as a collection of the controls and a string containing the db table name. Then the individual controls call functions of the class. Advanced forms will inherit and extend this basic form class. 1) Has there already been work done in this area? 2) Are there books / articles available which discuss the options available on this topic? Thanks!

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• C#/.Net Download file from premium rapidshare account

  - by Simon

  Hello, how can I log to premium rapidshare account from my source? I tryed this but it is not working: string authInfo = "name" + ":" + "pass"; authInfo = Convert.ToBase64String(Encoding.Default.GetBytes(authInfo)); client.Headers["Authorization"] = "Basic " + authInfo; client.DownloadFile("url", "C:\\Temp\\aaaa.file"); OR WebClient client = new WebClient(); client.Credentials = new NetworkCredential("name", "pass"); client.DownloadFile("url", "C:\\Temp\\aaaa.file"); Is there any simple way how download the file directly from rapidshare premium? Thank you a lot! Regards, simon

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• Capturing network traffic in ruby - pcap related issues

  - by Acidburn2k

  What I need is to write very simple application, which would listen to network traffic, filter out some packets based on various layer 4/5 information and then dump those information into database. I am quite confused on which pcap gem/plugin should I use. The basic pcap implemention seem to be a bit outdated (no changes since 2001) and doesn't work properly. I also tried pcaprub, but I am not quite sure how to get around with this library. It seem to capture raw packets without te ability to actualy get any data out of the pcap dump. Do you have any advices on how can I realize this simple task? Thanks in advance. :-)

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• Scheme: Detecting duplicate elements in a list

  - by Kyle Krull

  Does R6RS or Chez Scheme v7.9.4 have a library function to check if a list contains duplicate elements? Alternatively, do either have any built in functionality for sets (which dis-allow duplicate elements)? So far, I've only been able to find an example here. The problem with that is that it doesn't appear to actually be part of the Chez Scheme library. Although I could write my own version of this, I'd much rather use a well known, tested, and maintained library function - especially given how basic an operation this is. So a simple "use these built-in functions" or a "no built-in library implements this" will suffice. Thanks!

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• Comparing two Oracle schema, other users

  - by Igman

  Hello! I have been tasked with comparing two oracle schema with a large number of tables to find the structural differences in the schema. Up until know I have used the DB Diff tool in Oracle SQL Developer, and it has worked very well. The issue is that now I need to compare tables in a user that I cannot log into , but I can see it through the other users section in SQL developer. The issue is that whenever I try to use the diff tool to compare those objects to the other schema it does not work. Does anyone have any idea how to do this? It would save me a very large amount of work. I have some basic SQL knowledge if that is whats needed. Thanks.

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• Silverlight RIA Services. Query fails on large table but works with Where clause

  - by FauxReal

  I have a somewhat large table, maybe 2000 rows by 50 columns. When using the most basic imaginable RIA implementation. Create one-table Model Create DomainService Drop datagrid onto MainPage.xaml Drop datasource onto datagrid Ctrl-F5 I get this error: System.ServiceModel.DomainServices.Client.DomainOperationException: Load operation faild for query. Value cannot be null. Error is much larger, but thats the beginning of it. The weird thing is that if I narrow the results down with a where clause on the GetQuery, it works fine. In fact six different querys which together result in all of the rows being called works fine also. So basically, I'm sure its not some sort of rogue row. Why do I get this "Value cannot be null" error if I query the whole table? Thanks

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