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  • Embedded computer vision platforms

    - by Egon
    Hi folks, I am planning to start a computer vision based project on a smart phone platform. I know iPhone ( http://niw.at/articles/2009/03/14/using-opencv-on-iphone/en ) and Andriod ( http://github.com/billmccord/OpenCV-Android ) have openCV support. I am interested in knowing how was your experience with the level of integration, support and ease of building good apps on either platform. Also I do want to consider windows phone 7 ( and Zune) as a platform, Are there any Computer Vision libraries for that platform or any good development tools( does Aforgenet work or any other good suggestion) ? Also can you suggest some popular augmented reality apps which uses cutting edge technology ( I am aware of http://www.pranavmistry.com/projects/sixthsense/ ) Thnx in advance!

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  • Variable for the field name of mysql row result

    - by ana
    I'm retrieving a row with php from mysql and it has fields like: name_en, name_es, name_de... I want to retrieve the right field base on my $lang variable (en, es, de...). If the $lang variable is 'es', I'd need to get $row['name_es']. I've tried this (based on this thread), but it's not working: $name = $row->{'name_'.$lang}; Any idea how can I use a variable as the name of the field of a row? Thanks in advance for your help!

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  • How do you reconcile IDisposable and IoC?

    - by Mr. Putty
    I'm finally wrapping my head around IoC and DI in C#, and am struggling with some of the edges. I'm using the Unity container, but I think this question applies more broadly. Using an IoC container to dispense instances that implement IDisposable freaks me out! How are you supposed to know if you should Dispose()? The instance might have been created just for you (and therefor you should Dispose() it), or it could be an instance whose lifetime is managed elsewhere (and therefor you'd better not). Nothing in the code tells you, and in fact this could change based on configuration!!! This seems deadly to me. Can any IoC experts out there describe good ways to handle this ambiguity?

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  • What operating systems available for an 8-bit microprocessor?

    - by Benoit
    It does not need to be a full fledged OS, but at least have multitasking capabilities (i.e. a scheduler). Please mention what processor architecture it works on. This is a survey, so exact capabilities are not really important. Think of this as being a place to look at for possibilities when your next 8-bit embedded project comes up... I realize that most 8-bit micro do not require an OS, but just as a counter-example, Rabbit Semiconductor offers the RCM3710 processor module with 4 serial ports, a 10-BaseT ethernet port, 512K RAM and 512K Flash. All that for $39. All based around an 8-bit Z80 core. 8-bit does NOT necessarily mean extreme resource constraint.

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  • How do I use FB.Connect.streamPublish in an iframe facebook app?

    - by Gary
    I'm making a simple iframe-based facebook app. I have the following code to size my iframe: FB_RequireFeatures(["Connect"], function(){ FB.XdComm.Server.init('/xd_receiver.htm'); FB.CanvasClient.startTimerToSizeToContent(); FB.CanvasClient.syncUrl(); }); I want to add a link that will display a popup which will allow the user to post an app-defined image/link to the user's wall. To get things working initially, I tried just using the following code on a click event: FB.Connect.streamPublish(''); However, nothing happens. I've tried adding: FB.init(<?=API_KEY?>, '/xd_receiver.htm'); both inside the FB_RequireFeatures function, before it, after it... no luck. Nothing happens. No errors are thrown. Nothing. Any ideas?

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  • VSTO Outlook project

    - by Chris
    I currently have an Outlook 2007 VSTO plug-in which needs to write certain values into the registry. I am programmitically downloading and installing a new stationery into Outlook by saving a htm file into the users App Data folder and then updating the HKEY_CURRENT_USER\Software\Microsoft\Office\12.0\Common\MailSettings\NewTheme registry key which sets which stationery that is currently in use. So far everything is fine for 2007, but I have checked a PC that is running Outlook 2010, and this registry key is in a different spot. Instead of 12.0 as the version it is 14.0, which makes sense. Is there anyway I can determine what version the plugin is installed in, so that I can write the key based on the correct version in the correct location?!? I haven't been able to find anything on this so far, but surely there is a way..?!? Thanks in advance. Chris

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  • hidden row causing issue with tablesorter zebra striping

    - by Harvengure
    Sorry if this has already been solved elsewhere but my searches have been able to turn up nothing and my attempts at solving the issue myself have made even less progress. :P Put quite simply I have a table that is using the jquery tablesorter and it's zebra widget. In this table there is a hidden column. I've so far been able to make it so that when a tr contains specific text (I was aiming for * but was seemingly unable to get \* to work for whatever reason...and I suspect my selector is perhaps not specific enough) the containing row is set not to display by ".hide()". The problem I am having though is when the row is hidden, tablesorter does exactly what it should do and stripes all the rows their specific colours based on their odd and even values. Of course .remove doesn't do the trick either as the table still sees some funny striping. Any thoughts on how to make it so that when a row is hidden, the striping compensates?

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  • What is the most Word-like ASP.NET custom control that you can buy?

    - by rtemp
    We are looking to implement a rich-text box in an ASP.NET application and our requirements are specific to using the "Track Changes" features of Microsoft Word. The closest thing we found in the RadEditor by Telerik. This is a nice control that has a "Track Changes" button and will give you the ability to track the changes from the text in the box to now. It does not let you track your changes from the two previous versions. We have used CVSWeb in the past and the display was not great but it did have the ability (in a web page) to diff two different versions of text (source code in this case). Does anyone have any experience or know of any web-based diff tools that work nicely with a rich-text editor in the web?

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  • Dynamic IMAP/Pop3 Email Address Creation

    - by Vadi
    I have a requirement in my project to create dynamic email address on the fly. For example, similar to flickr has the option of uploading photos (or blogger.com has an option of rececing blog posts in predefined email addresses). The email address can be like "[email protected]", once this email address is created what ever the incoming mails will be processed based on certain scenarios. My questions are: What are the solutions available for having our own IMAP/POP3 Server in Windows? Exchange is not an option though, any commercial softwares will do. Is there any way we can have one real email box and that will be masked with alphanumeric email addresss to minimize the creation of email addresses.

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  • how to create iPhone main menu screen with 2 tabbars subview ?

    - by Boaz
    Hi. I made two applications that each one of them is tabbar based. Now I want to combine them to one app that will be struct like that: -Main menu with 2 buttones. - button 1: tab bar app no 1. - button 2: tab bar app no 2. from each tab bar app, I want an Home button on the left side of the nav bar that will take me to the main menu. I found this link http://www.pushplay.net/blog_detail.php?id=27 but it's not good to me.. I will be happy if you will able to post some simple code for my problem.. Thanks.

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  • How big can a user agent string get?

    - by Josh
    If you were going to store a user agent in a database, how large would you accomdate for? I found this technet article which recommends keeping UA under 200. It doesn't look like this is defined in the HTTP specification at least not that I found. My UA is already 149 characters, and it seems like each version of .net will be adding to it. I know I can parse the string out and break it down but I'd rather not. EDIT Based on this Blog IE9 will be changing to send the short UA string. This is a good change.

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  • GPS with J2ME polish

    - by JV
    Hi all, I'm developing an GPS based application with J2ME and J2ME polish(2.1.2), i'm facing problems for accessing the location class. I'm getting the following exception Exception in thread "event-thread" java.lang.UnsatisfiedLinkError: aa.a(I)V Nokia/N95: at aa.a(Native Method) Nokia/N95: at ae.<clinit>(Unknown Source) Nokia/N95: at b.j(Unknown Source) Nokia/N95: at com.allstate.mini.MINIMidlet.commandAction(Unknown Source) Nokia/N95: at ax.b(Unknown Source) Nokia/N95: at u.b(Unknown Source) Nokia/N95: at al.d(Unknown Source) Nokia/N95: at bd.keyReleased(Unknown Source) Nokia/N95: at javax.microedition.lcdui.Display$KeyEvent.run(Display.java:158) Nokia/N95: at org.microemu.device.ui.EventDispatcher.post(EventDispatcher.java:144) Nokia/N95: at org.microemu.device.ui.EventDispatcher.run(EventDispatcher.java:74) Nokia/N95: at java.lang.Thread.run(Unknown Source) Please help...

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  • Scala: working around the "illegal cyclic reference"

    - by Paul Milovanov
    Hi all, I'm trying to implement a HashMap-based tree that'd support O(1) subtree lookup for a given root key. To that goal, I'm trying to do the following: scala> type Q = HashMap[Char, Q] <console>:6: error: illegal cyclic reference involving type Q type Q = HashMap[Char, Q] ^ So the question is, is there a way for me to do something of the sort without resorting to the ugly HashMap[Char, Any] with subsequent casting of values to HashMap[Char, Any]? Now, I also see that I can use something like the following to avoid the cyclic-reference error, and it might even be cleaner -- but it'd be nice to find out how to correctly do it the first way, just for the educational value. import collections.mutable.HashMap class LTree { val children = new HashMap[Char, LTree] } Thanks a bunch.

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  • width of a frustum at a given distance from the near plane

    - by structolite
    I'm using CML to manage the 3D math in an OpenGL-based interface project I'm making for work. I need to know the width of the viewing frustum at a given distance from the eye point, which is kept as a part of a 4x4 matrix that represents the camera. My goal is to position gui objects along the apparent edge of the viewport, but at some distance into the screen from the near clipping plane. CML has a function to extract the planes of the frustum, giving them back in Ax + By + Cz + D = 0 form. This frustum is perpendicular to the camera, which isn't necessarily aligned with the z axis of the perspective projection. I'd like to extract x and z coordinates so as to pin graphical elements to the sides of the screen at different distances from the camera. What is the best way to go about doing it? Thanks!

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  • Google Toolbox For Mac with Core Data on iPhone results in error

    - by JaanusSiim
    I have set up my project for using Google Toolbox for Mac as described on official wiki. And everything is working as expected. For core data usage I have created a 'database' class that uses for final application SQLite storage (this is done based on Xcode template code). For unit tests I have created separate init method for 'database' to use in memory storage (storage url is [NSURL URLWithString:@"memory://store"] and type NSInMemoryStoreType). Without adding my model file (*.xcdatamodel) to unit tests target, test fail in expected place with message: executeFetchRequest:error: A fetch request must have an entity. If I add model file to the test target, then test is executed as expected (core data part looks OK), but after tests execution I get: RunIPhoneUnitTest.sh: line 123: 9487 Segmentation fault "$TARGET_BUILD_DIR/$EXECUTABLE_PATH" -RegisterForSystemEvents Command /bin/sh failed with exit code 139 This problem does not looks directly related to core data, but only happens if model file is added to target. Any pointers on resolving this issue would be appreciated!

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  • CodePlex Daily Summary for Thursday, May 24, 2012

    CodePlex Daily Summary for Thursday, May 24, 2012Popular ReleasesJayData - The cross-platform HTML5 data-management library for JavaScript: JayData 1.0 RC1 Refresh 2: JayData is a unified data access library for JavaScript developers to query and update data from different sources like webSQL, indexedDB, OData, Facebook or YQL. See it in action in this 6 minutes video: http://www.youtube.com/watch?v=LlJHgj1y0CU Overview Knockout.js integrationUsing the Knockout.js module, your UI can be automatically refreshed when the data model changes, so you can develop the front-end of your data manager app even faster. Querying 1:N relations in WebSQL & SQLite SQ...????SDK for .Net 4.X: 2012?5?25??: ?Google Code????,???????????? *??????? *??????? *?????,????????????API?????Christoc's DotNetNuke Module Development Template: 00.00.08 for DNN6: BEFORE USE YOU need to install the MSBuild Community Tasks available from http://msbuildtasks.tigris.org For best results you should configure your development environment as described in this blog post Then read this latest blog post about customizing and using these custom templates. Installation is simple To use this template place the ZIP (not extracted) file in your My Documents\Visual Studio 2010\Templates\ProjectTemplates\Visual C#\Web OR for VB My Documents\Visual Studio 2010\Te...Microsoft Ajax Minifier: Microsoft Ajax Minifier 4.53: fix issue #18106, where member operators on numeric literals caused the member part to be duplicated when not minifying numeric literals ADD NEW FEATURE: ability to create source map files! The first mapfile format to be supported is the Script# format. Use the new -map filename switch to create map files when building your sources.BlackJumboDog: Ver5.6.3: 2012.05.22 Ver5.6.3  (1) HTTP????????、ftp://??????????????????????LogicCircuit: LogicCircuit 2.12.5.22: Logic Circuit - is educational software for designing and simulating logic circuits. Intuitive graphical user interface, allows you to create unrestricted circuit hierarchy with multi bit buses, debug circuits behavior with oscilloscope, and navigate running circuits hierarchy. Changes of this versionThis release is fixing start up issue.DragonDen: SHARK-PROMPT: The ultimate Command Prompt for creating, deleting, editing, opening files with the option to change theme of window. It displays messages, clears screen, shows directory info also. SHARK PROMPT IS ALL IN ONE!!Internals Viewer (updated) for SQL Server 2008 R2.: Internals Viewer for SSMS 2008 R2: Updated code to work with SSMS 2008 R2. Changed dependancies, removing old assemblies no longer present and replacing them with updated versions.Orchard Project: Orchard 1.4.2: This is a service release to address 1.4 and 1.4.1 bugs. Please read our release notes for Orchard 1.4.2: http://docs.orchardproject.net/Documentation/Orchard-1-4-Release-NotesSharePoint Euro 2012 - UEFA European Football Predictor: havivi.euro2012.wsp (1.0): New fetures:View other users predictions Hide/Show background image (web part property) Installing SharePoint Euro 2012 PredictorSharePoint Euro 2012 Predictor has been developed as a SharePoint Sandbox solution to support SharePoint Online (Office 365) Download the solution havivi.euro2012.wsp from the download page: Downloads Upload this solution to your Site Collection via the solutions area. Click on Activate to make the web parts in the solution available for use in the Site C...Metadata Document Generator for Microsoft Dynamics CRM 2011: Metadata Document Generator (2.0.0.0): New UI Metro style New features Save and load settings to/from file Export only OptionSet attributes Use of Gembox Spreadsheet to generate Excel (makes application lighter : 1,5MB instead of 7MB)NN Crew Calculator: Calculator v1.0: This is our first version of our calculator which includes a Basic view and Advanced view Basic View includes: Basic Math Operations Square Root Factorial Squared Percentage Negative E and Pi Advanced View includes: Everything from Basic View Trignometric Functions Take the Root of any number Take a number^of another number Mod of some number Degrees or Radians optionStackr Programming Language: DCPU-16 Assembly Compiler: Version 1.0 release of the DCPU-16 Assembly trans-compiler. See DCPU-16 Compiler Reference for usage.Silverlight socket component: Smark.NetDisk: Smark.NetDisk?????Silverlight ?.net???????????,???????????????????????。Smark.NetDisk??????????,????.net???????????????????????tcp??;???????Silverlight??????????????????????ExtAspNet: ExtAspNet v3.1.6: ExtAspNet - ?? ExtJS ??? ASP.NET 2.0 ???,????? AJAX ?????????? ExtAspNet ????? ExtJS ??? ASP.NET 2.0 ???,????? AJAX ??????????。 ExtAspNet ??????? JavaScript,?? CSS,?? UpdatePanel,?? ViewState,?? WebServices ???????。 ??????: IE 7.0, Firefox 3.6, Chrome 3.0, Opera 10.5, Safari 3.0+ ????:Apache License 2.0 (Apache) ??:http://bbs.extasp.net/ ??:http://demo.extasp.net/ ??:http://doc.extasp.net/ ??:http://extaspnet.codeplex.com/ ??:http://sanshi.cnblogs.com/ ????: +2012-05-20 v3.1.6 -??RowD...Dynamics XRM Tools: Dynamics XRM Tools BETA 1.0: The Dynamics XRM Tools 1.0 BETA is now available Seperate downloads are available for On Premise and Online as certain features are only available On Premise. This is a BETA build and may not resemble the final release. Many enhancements are in development and will be made available soon. Please provide feedback so that we may learn and discover how to make these tools better.PHPExcel: PHPExcel 1.7.7: See Change Log for details of the new features and bugfixes included in this release. BREAKING CHANGE! From PHPExcel 1.7.8 onwards, the 3rd-party tcPDF library will no longer be bundled with PHPExcel for rendering PDF files through the PDF Writer. The PDF Writer is being rewritten to allow a choice of 3rd party PDF libraries (tcPDF, mPDF, and domPDF initially), none of which will be bundled with PHPExcel, but which can be downloaded seperately from the appropriate sites.GhostBuster: GhostBuster Setup (91520): Added WMI based RestorePoint support Removed test code from program.cs Improved counting. Changed color of ghosted but unfiltered devices. Changed HwEntries into an ObservableCollection. Added Properties Form. Added Properties MenuItem to Context Menu. Added Hide Unfiltered Devices to Context Menu. If you like this tool, leave me a note, rate this project or write a review or Donate to Ghostbuster. Donate to GhostbusterEXCEL??、??、????????:DataPie(??MSSQL 2008、ORACLE、ACCESS 2007): DataPie_V3.2: V3.2, 2012?5?19? ????ORACLE??????。AvalonDock: AvalonDock 2.0.0795: Welcome to the Beta release of AvalonDock 2.0 After 4 months of hard work I'm ready to upload the beta version of AvalonDock 2.0. This new version boosts a lot of new features and now is stable enough to be deployed in production scenarios. For this reason I encourage everyone is using AD 1.3 or earlier to upgrade soon to this new version. The final version is scheduled for the end of June. What is included in Beta: 1) Stability! thanks to all users contribution I’ve corrected a lot of issues...New ProjectsAmazon S3 Library for Lucene.Net: A library with all the needed classes to run Lucene.Net off the cloud (on Amazon S3 storage).atomWaterMark: The atomWatermark plugin is a lightweight Jquery plugin that helps you watermark your text box and text area html elements. Its a tiny plugin if you are bothered about speed. Less than a KB. by atomSoft Technologies $('input').atomWaterMark(); // Thats allDaily Integration: A collection of tools to support daily code integration and TFS check in eventsDelete any type of files: This is a small utility which can be used to delete any type of file from any directory (and it's sub-directories) based on their modified date. You can control all settings via app.config and DeleteFile.config files. Everybody Edits Account Manager: If you have got more than one everybody edits account, Everybody Edits Account Manager is just made for you! It is created to allow players of the game Everybody Edits with two or more Accounts easily switch between their accounts with one click. Without having to enter their email and password every time. It supports Regular and Facebook accounts and even guests.Incremental Save Visual Studio Extension: A Visual Studio Extension that keeps a local file history on disk.LINQ_Koans: This is a set of Koans to help you learn LINQ syntax by writing code in VS2010.LiteIoC: Super Small IOC container library specifically crafted for the .Net Micro Framework. MediaCentral: A lightweight, easy to use multimedia center solution for SharePoint, as developed primarily for the EUSP Hackathon.Microsoft Touch Mouse Plus: A little utility to alter some default behaviors of the Touch Mouse by Microsoft.Move My Car: car owners parking in CBD need social network to share information about swapping parking places, share parking zones info and connect to parking web servicesMuki Accounting System: *Project Description* {project:description} Purchases Goods Receivable Notes Accounts Payable Items and Inventory Manufacturing Sales Management Accounts Receivable Workflow ???? ???? ??? ????/???? ???? ???? ??? ??? e-mail : 1027842@qq.com myManga: Clean Metro-Style simple to use Manga Reader written in WPF C#. Download and organize your manga from various sites across the internet in an easy to use application.Open Xml as Butter: This project aims to manage Document Templates ( .docx ) and their related data ; those data are divided into families, each of those families describe an area of a business activity. For Sales you will find Product , Customer, Sale, ... families. All of that is stored in a repository, an object database ( db4o ). It's a web application made in C#, with Open XML SDK 2.0 that not only manages Templates ( Document & Data ) but also lets your modify .docx in MSWord 2007 or more recent. ...Pranav Sharma: I am a Microsoft Certified SharePoint Solution Developer (MCTS) & SharePoint IT Professional (MCITP) with 4+ years of combined SharePoint experience. Currently working as a Senior SharePoint Consultant with Portal Solutions specializing in the Architecture & Development of complex custom solutions. I have worked with clients such as GirlScouts of USA, Conservation International, ECS, Fraunhofer Prometric & AVMA. Until recently, I was a consulting analyst with Accenture Technology Consulting w...PythonEngine: PythonEngine is an engine for building and executing python scripts from a web application. It includes: 1. script datasource & database schema; 2. script engine, with an in-memory cache of compiled code; 3. controls to add script from web applications. It was used, in an older version, on a production environment for years. It uses unity for building instances.quiz245: application for quizRoleplay-Functional RunUO: Roleplay RunUO is a fork of the popular Ultima Online Emulation, it focuses primarily on Roleplay shards. This release is intended to include everything needed to run a roleplay shard from scratch, including: A fully operational Race System A fully operational Alignment System A fully operational Class System A fully operational Guard System A fully operation Feat System. and more.sendine core: This project is aim to contains common process methods, includes Binary utility, I/O utility, Configuration, Net Protocol Simulator, Web Router, Security ... Now we recommend you should using .NET 3.5 or later version for more powerful features.Skyhook.PhotoViewer: The Skyhook Photo Viewer will be a tutorial project using many different design patterns and practices.Stellar Results: Astronomical Tracking System for IUPUI CSCI506 - Fall 2007, Team2Student Teaching Database: This is a C# application to manage student teaching placements for Missouri State University. It uses Entity Framework and SQL Server Express.Super Simple ClickOnce Updater Utility: This is a project for ClickOnce that helps with updating other projects that have been deployed with... Microsoft's ClickOnce!TBCorp: DescTextPioneer: This is vis project to discribe text.VisGroup: visgroup project by Sherryweihao, FrogcherryVotanet Open Vote: Sistema de votaciones onlineWinPath: WinPath is a command-line tool for Windows that makes the edition of the PATH environment variable simple. WinPath has been especially designed to simplify environment setup during application deployments but it has also been thought to be reused and integrated by other .NET applications.

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  • Drupal Custom Form with Filters

    - by dallasclark
    I'm displaying cars on a page created with a view and displays. I want to be able to create a form on the home page to allow people to select the 'make', which will then update the 'models' list based on the 'make' the user selects, 'year' to and from, and 'amount' to and from. What the user selects will of course alter the list of used cars, whether that's on the existing used cars page or a new page. I would be happy to create a custom module if required, just need some direction. Thanks !

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  • Java Slick2d - How to translate mouse coordinates to world coordinates

    - by SYNYST3R1
    I am translating in my main class' render. How do I get the mouse position based on the translation? public void render(GameContainer gc, Graphics g) throws SlickException { float centerX = 800/2; float centerY = 600/2; g.translate(centerX, centerY); g.translate(-player.playerX, -player.playerY); gen.render(g); player.render(g); } playerX = 800 /2 - sprite.getWidth(); playerY = 600 /2 - sprite.getHeight(); I update the player position on keydown by .2f * delta Picture to help with explanation i92.photobucket.com/albums/l22/occ31191/Untitled-4.png

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  • Embedding googleVis charts into a web site

    - by gd047
    Reading from the googleVis package vignette: "With the googleVis package users can create easily web pages with interactive charts based on R data frames and display them either via the R.rsp package or within their own sites". Following the instructions I was able to see the sample charts, using the plot method for gvis objects. This method by default creates a rsp-file in the rsp/myAnalysis folder of the googleVis package, using the type and chart id information of the object and displays the output using the local web server of the R.rsp package (port 8074 by default). Could anybody help me (or provide some link) on the procedure someone has to follow in order to embed such charts into an existing web site (e.g. a joomla site)?

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  • ASP.Net MVC Where do you convert from Entities to ViewModels?

    - by Pino
    Title pretty much explains it all, its the last thing I'm trying to work into our project. We are structured with a Service Library which contains a function like so. /// <summary> /// Returns a single category based on the specified ID. /// </summary> public Category GetCategory(int CategoryID) { var RetVal = _session.Single<Category>(x => x.ID == CategoryID); return RetVal; } Now Category is a Entity (We are using Entity Framework) we need to convert that to a CategoryViewModel. Now, how would people structure this? Would you make sure the service function returned a CategoryViewModel? Have the controller pull the data from the service then call another function to covnert to a view model?

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  • Cost of using repeated parameters

    - by Palimondo
    I consider refactoring few method signatures that currently take parameter of type List or Set of concrete classes --List[Foo]-- to use repeated parameters instead: Foo*. This would allow me to use the same method name and overload it based on the parameter type. This was not possible using List or Set, because List[Foo] and List[Bar] have same type after erasure: List[Object]. In my case the refactored methods work fine with scala.Seq[Foo] that results from the repeated parameter. I would have to change all the invocations and add a sequence argument type annotation to all collection parameters: baz.doStuffWith(foos:_*). Given that switching from collection parameter to repeated parameter is semantically equivalent, does this change have some performance impact that I should be aware of? Is the answer same for scala 2.7._ and 2.8?

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  • Haskell: type inference and function composition

    - by Pillsy
    This question was inspired by this answer to another question, indicating that you can remove every occurrence of an element from a list using a function defined as: removeall = filter . (/=) Working it out with pencil and paper from the types of filter, (/=) and (.), the function has a type of removeall :: (Eq a) => a -> [a] -> [a] which is exactly what you'd expect based on its contract. However, with GHCi 6.6, I get gchi> :t removeall removeall :: Integer -> [Integer] -> [Integer] unless I specify the type explicitly (in which case it works fine). Why is Haskell inferring such a specific type for the function?

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  • What Does OSGi Solve?

    - by Pablo Fernandez
    I've read on wikipedia and other sites about OSGi, but I don't really see the big picture. It says that it's a component based platform, and that you can reload modules at runtime. Also the "practical example" given everywhere is the Eclipse Plugin Framework. My questions are: 1) What is the CLEAR and SIMPLE definition of OSGi? 2) What COMMON PROBLEMS does it solve? By "common problems" I mean problems we face everyday, like "what can OSGi do for making our jobs more efficient/fun/simple" Thanks.

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  • Prevent IE users from visiting my site?

    - by Paul Hatcherian
    Internet Explorer has caused me a lot of trouble over the years, between security problems, memory leaks, endless CSS and JavaScript hacks to get my site to look correct, and inconsistencies between releases, I've spent countless hours as the hapless victim of IE's idiosyncrasies. Well that ends today, I've decided to take matters into my own hands and ban all users of IE from visiting my website. That will teach them to use such a cruddy browser. My question is how best to do this? I don't want to rely on JavaScript, which could be disabled, nor the request agent string, which could be tampered with. A clever user could even temporarily switch to Firefox or Chrome just to visit my site. Ideally, I'd have a list of the IP addresses of every IE user in the world and restrict based on the IP address. The main problem I'm having, aside from getting the list in the first place, is how do I keep it updated? Thanks!

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  • Rapidly prototype GUI's...

    - by Donovan
    G'Day, I am looking to prototype a windows based GUI. Ideally I would like: Be able create new GUI's and change existing ones quickly The resulting "thing" to be self contained Have the ability to include limited data where necessary ie. When showing a grid including the headers and perhaps a few rows of data for the grid. Allow clickable hotspots that either allow a new screen to be shown or perhaps an explanation hint. I have been using Visio 2003 for this kind of thing and then producing a PDF. However it has some disadvantages: Including data for grids is not possible You cannot include hotspots to allow changing of tabs within the workbook. eg Click on a button and it opens a different tab. If possible a free / open source application would be preferable but a low priced commercial application would also be good. All pointers and suggestions greatly appreciated.Rapid

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