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  • Class as first-class object

    - by mrpyo
    Could a class be a first-class object? If yes, how would the implementation look? I mean, how could syntax for dynamically creating new classes look like? EDIT: I mean what example syntax could look like (I'm sorry, English is not my native language), but still I believe this question makes sense - how you give this functionality while keeping language consistent. For example how you create reference for new type. Do you make reference first-class object too and then use something like this: Reference<newType> r = new Reference<newType>(); r.set(value); Well this could get messy so you may just force user to use Object type references for dynamically created classes, but then you loose type-checking. I think creating concise syntax for this is interesting problem which solving could lead to better language design, maybe language which is metalanguage for itself (I wonder if this is possible).

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  • Adding unit tests to a legacy, plain C project

    - by Groo
    The title says it all. My company is reusing a legacy firmware project for a microcontroller device, written completely in plain C. There are parts which are obviously wrong and need changing, and coming from a C#/TDD background I don't like the idea of randomly refactoring stuff with no tests to assure us that functionality remains unchanged. Also, I've seen that hard to find bugs were introduced in many occasions through slightest changes (which is something which I believe would be fixed if regression testing was used). A lot of care needs to be taken to avoid these mistakes: it's hard to track a bunch of globals around the code. To summarize: How do you add unit tests to existing tightly coupled code before refactoring? What tools do you recommend? (less important, but still nice to know) I am not directly involved in writing this code (my responsibility is an app which will interact with the device in various ways), but it would be bad if good programming principles were left behind if there was a chance they could be used.

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  • Custom extensible file format for 2d tiled maps

    - by Christian Ivicevic
    I have implemented much of my game logic right now, but still create my maps with nasty for-loops on-the-fly to be able to work with something. Now I wanted to move on and to do some research on how to (un)serialize this data. (I do not search for a map editor - I am speaking of the map file itself) For now I am looking for suggestions and resources, how to implement a custom file format for my maps which should provide the following functionality (based on MoSCoW method): Must have Extensibility and backward compatibility Handling of different layers Metadata on whether a tile is solid or can be passed through Special serialization of entities/triggers with associated properties/metadata Could have Some kind of inclusion of the tileset to prevent having scattered files/tilesets I am developing with C++ (using SDL) and targetting only Windows. Any useful help, tips, suggestions, ... would be appreciated!

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  • Enhanced LINQ to SQL Compatible ORM Solution from Devart

    Devart has recently announced the release of LinqConnect - an enhanced LINQ to SQL compatible ORM solution with extended functionality, support for SQL Server, Oracle, MySQL, PostgreSQL, and SQLite, its own visual model designer, seamlessly integrating to Visual Studio, and SQL monitoring tool. LinqConnect allows you to quickly create mapping model and generate data access layer code for your application, greatly decreasing development time and eliminating the need to work over routine tasks. It...Did you know that DotNetSlackers also publishes .net articles written by top known .net Authors? We already have over 80 articles in several categories including Silverlight. Take a look: here.

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  • Interfacing the payment systems

    - by etranger
    Hello all. I'm a complete newbie to using online payment systems for web projects, and can't really think of where to start. Let's assume that web system in question needs to generate some income online, and the business idea/functionality is in place, while organizing cash flow is the only unsolved problem. Points of interest are how the custom developed software interfaces to payment systems, and how the resulting income is available to the owner. I do understand that there are probably hundreds of systems out there, but to be more specific on which of them suit, I'd have to know how they work, and that's where I don't feel like understanding much. Thanks in advance.

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  • Is a finite state machine an appropriate solution for this situation?

    - by user1936
    I was writing some test code as an example where I had a washing machine class. It has a door state that should be open or closed, and also a running state, either on or off. I want to prevent the running state from changing from 'off' to 'on' when the door is 'open', and also prevent the door from being set to 'open' while the machine is 'on'. I have this functionality rigged up with a bunch of if statements. It feels inelegant and it could quickly turn into spaghetti code if I want to add another state that puts additional conditions on the changes of other states. I wonder, is a finite state machine a solution for this situation? Would it simplify adding states and defining valid transitions?

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  • LuaJit FFI and hiding C implementation details

    - by wirrbel
    I would like to extend an application using LuaJit FFI. Having seen http://luajit.org/ext_ffi_tutorial.html this is surprisingly easy when comparing this to the Lua C API. So far so good. However I do not plainly want to wrap C functions but provide a higher level API to users writing scripts for the application. Especially I do not want users to be able to access "primitives", i.e. the ffi.* namespace. Is this possible or will that ffi namespace be available to user's Lua scripts? On the issue of Sandboxing Lua I found http://lua-users.org/wiki/SandBoxes which is not talking about FFI though. Furthermore, the plan I have described above is assuming that the introduction of abstraction layers happens on the lua side of code. Is this an advisable approach or would you rather abstract functionality on the statically compiled code (on the C-side)?

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  • PHP accessible shared content between two websites on the same VPS on different domains/IPs

    - by Lee Fentress
    I have two ecommerce websites, selling music digital downloads, on the same VPS, currently using cPanel/WHM (but thinking of switching to Virtualmin). They have separate domains and IPs of course. They both share from the same set of music files, so I have duplicate copies in each website directory, which takes up a lot of disk space. How might I go about sharing the same set of music files across both sites, allowing PHP access, so that it does not break my shopping cart's functionality of serving customers the downloads after they have paid for them? I thought of maybe using symlinks or something, but I don't know if it's possible, or if it would have to somehow circumvent built-in security features of the server. I'm new to VPS management.

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  • Electronic Arts Talks about their Upgrade to Oracle E-Business Suite Release 12

    Electronic Arts Inc. is a leading global interactive entertainment software company. EA develops, publishes, and distributes interactive software worldwide for video game systems, personal computers, wireless devices and the Internet. EA uses many Oracle products such as E-Business Suite, Demantra, PeopleSoft, Hyperion, Fusion Middleware, etc . Last year, EA needed an ERP Transformation and wanted to move to one global single instance to manage their business better. They decided to migrate from E-Business Suite 11.5.9 to Release 12 to get the added functionality they needed.

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  • What is a "cross-functional team" actually?

    - by Idsa
    The general meaning of "cross-functional team" is a team which combines specialists in different fields that are required to reach the goal. But it looks like in Agile cross-functionality means not only combining different specialists, but making them mix. Henrik Kniberg defines cross-functional team this way: "Cross-functional just means that the team as a whole has all skills needed to build the product, and that each team member is willing to do more than just their own thing." But where is the line drawn? Is it normal to ask developers to become testers for an iteration if it is required?

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  • Services or Shared Libraries?

    - by Royal
    I work in an environment where we have several different web applications, where each of them have different features but still need to do similar things: authentication, read from common data sources, store common data, etc. Is it better to build the shared functionality into a set of services, to be called by the web apps, or is it better to make a shared library, which the webapps include? The services or libraries would need to access various databases, and it seems like keeping that access in a single place (service) is a good idea. It would also reduce the number of database connections needed. A service would also keep the logic in a single place, but then it could be argued that a shared library can do the same thing. Are there other benefits to be gained from using services over shared libraries?

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  • Programmer logbook application?

    - by jsoldi
    I've just released my application to the public, and I'm working on an updated version, but I really think I should keep track of ALL the code changes. In case some functionality suddenly starts failing, with a history of all the changes I made it would be a lot easier to figure out where I messed it up, in case the problem wasn't already there. The ideal would be to have a super fast computer with a huge hard drive and an application that automatically saves a backup of the whole project every time I change a line in the code, with some file comparison tool that would show me every difference between any two backed up projects, but that's not really possible for now. So, do you know any application that makes it easy for a programmer to keep track of the changes made to the source code?

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  • Oculus Rift with Antichamber

    - by Scott Hainline
    Antichamber runs great on linux (steam version). But it is not playable with the Oculus Rift at this point. The issues are: 1) no headtracking 2) graphics are not being split and distorted by Oculus SDK My current plan is to use LD_PRELOAD to add the functionality, this seems to be the linux equivalent of DLL injection. Antichamber appears to be using SDL, I'm hoping this can be configured to use the headtracking data as a joystick and apply the graphics distortion, but I am not sure which functions I should be looking for. Is there a simpler way of getting these issues resolved? Is SDL the right choice here? Would appreciate any information on how the Unreal Engine 3 works under linux; and library injection too.

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  • InvalidProgramException Running Unit Test

    - by Anthony Trudeau
    There is a bug in the unit testing framework in Visual Studio 2010 with unit testing.  The bug appears in a very special circumstance involving an internal generic type. The bug causes the following exception to be thrown: System.InvalidProgramException: JIT Compiler encountered an internal limitation. This occurs under the following circumstances: Type being tested is internal or private Method being tested is generic  Method being tested has an out parameter Type accessor functionality used to access the internal type The exception is not thrown if the InternalsVisibleToAttribute is assigned to the source assembly and the accessor type is not used; nor is it thrown if the method is not a generic method. Bug #635093 has been added through Microsoft Connect

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  • Interface extension

    - by user877329
    Suppose that I have an input stream interface, which defines a method for reading data. I also have a seekable interface which defines a method for seeking. A natural way of defining a input file is then to implement both input stream and seekable. I want to construct a data decoder from the input stream interface so I can read data from a file or from another stream. The problem is that I also want to implement seek functionality to the data decoder, since I want to be able to step individual records not raw bytes. This is not possible if I only provide an input stream, which does not have the bytewise seek method. Should I skip the seekable interface and add the seek method to input stream instead and force all streams to at least leave it as a nop.

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  • Modeling Websites and Native Code

    I've blogged previously about the Architecture tools in Visual Studio 2010. These tools offer a fantastic way to understand an existing application, design some new functionality, and validate an implementation against architectural rules and constraints. Recently, we announced the availability of the Visualization and Modeling Feature Pack for MSDN subscribers, which complements the Architecture tools in Visual Studio 2010 by adding support for: C/C++ code visualization Website visualization Improved...Did you know that DotNetSlackers also publishes .net articles written by top known .net Authors? We already have over 80 articles in several categories including Silverlight. Take a look: here.

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  • Modeling Websites and Native Code

    I've blogged previously about the Architecture tools in Visual Studio 2010. These tools offer a fantastic way to understand an existing application, design some new functionality, and validate an implementation against architectural rules and constraints. Recently, we announced the availability of the Visualization and Modeling Feature Pack for MSDN subscribers, which complements the Architecture tools in Visual Studio 2010 by adding support for: C/C++ code visualization Website visualization Improved...Did you know that DotNetSlackers also publishes .net articles written by top known .net Authors? We already have over 80 articles in several categories including Silverlight. Take a look: here.

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  • Using IE 9 as my primary browser

    - by Robert May
    With the release of Internet Explorer 9 RC the browser looks to be in a usable state.  So far, my experience has been positive. However, one area where I am having problems is when people are using the jQueryUI library.  Versions older than 1.8 cause IE 9.0 to be unable to drag and drop.  This is a real pain, especially at sites like Agile Zen, where dragging and dropping is a primary bit of functionality. Now that IE 9 is a release candidate, we’ll see how quickly these things improve.  I expect things to be rough, but so far, I’m really liking IE 9.  There’s more real estate than Chrome (it’s the tabs inline with the address bar) and its faster than Chrome 9.0 and FF 3.6.8 (as tested on my own machine). The biggest drawback so far is that because IE has been so badly behaved in the past, sites expect it to be badly behaved now, which is breaking things now. Technorati Tags: Internet Explorer

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  • openGL Camera setup for Zoom in/out centered at point under cursor

    - by user3228921
    I am trying to implement a zoom in/out navigation mode in a openGL 3dViewer. I was able to implement zoom functionality centered at screen center just by moving eye towards the center in perspective mode. Now i am trying to do the zoom centered at arbitrary position under the cursor. I am unable to figure out how should i move my camera forward and backward such that point under cursor remains at the same screen coordinates after zoom in/out. Any help would be appreciated. Below are the images which show the desired effect. Just to mention, I am working in a perspective mode with eye target and up vectors to control camera. Same effect i found in google sketchup and 'zoom to mouse position' setting in blender.

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  • Caller Info Attributes in C# 5.0

    - by Jalpesh P. Vadgama
    In c# 5.0 Microsoft has introduced a Caller information attribute. It’s a new feature that is introduced in C# 5.0 and very useful if you want to log your code activities. With the help of this you can implement the log functionality very easily. It can help any programmer in tracing, debugging and diagnostic of any application. With the help of Caller Information we can get following information over there. CallerFilePathAttribute: With help of  this attribute we can get full path of source file that contains caller. This will be file path from which contains caller at compile time. CallerLineNumberAttribute:  With the help of this attribute we can get line number of source file which the method is called. CallerMemberNameAttribute: With the help of this attribute we can get the method or property name of the caller. Read more

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  • Add ability to add tabs to the end of a line in Windows PowerShell ISE

    - by deadlydog
    Originally posted on: http://geekswithblogs.net/deadlydog/archive/2013/06/24/add-ability-to-add-tabs-to-the-end-of-a.aspxIn the preamble of an earlier post I mentioned that one of the little things that bugs me about Windows PowerShell ISE is that you can add tabs to the start of a line, but not to the end of a line.  This is likely because it would interfere with the tab-completion feature.  I still like to be able to put tabs on the end of my code lines though so that I can easily line up my comments.  Here is how we can achieve this functionality in PowerShell ISE. Read more at http://blog.danskingdom.com/add-ability-to-add-tabs-to-the-end-of-a-line-in-windows-powershell-ise/

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  • Oracle Cloud Applications: The Right Ingredients Baked In

    - by yaldahhakim
    v\:* {behavior:url(#default#VML);} o\:* {behavior:url(#default#VML);} w\:* {behavior:url(#default#VML);} .shape {behavior:url(#default#VML);} Normal 0 false false false false EN-US X-NONE X-NONE /* Style Definitions */ table.MsoNormalTable {mso-style-name:"Table Normal"; mso-tstyle-rowband-size:0; mso-tstyle-colband-size:0; mso-style-noshow:yes; mso-style-priority:99; mso-style-qformat:yes; mso-style-parent:""; mso-padding-alt:0in 5.4pt 0in 5.4pt; mso-para-margin-top:0in; mso-para-margin-right:0in; mso-para-margin-bottom:10.0pt; mso-para-margin-left:0in; line-height:115%; mso-pagination:widow-orphan; font-size:11.0pt; font-family:"Calibri","sans-serif"; mso-ascii-font-family:Calibri; mso-ascii-theme-font:minor-latin; mso-fareast-font-family:"Times New Roman"; mso-fareast-theme-font:minor-fareast; mso-hansi-font-family:Calibri; mso-hansi-theme-font:minor-latin;} Oracle Cloud Applications: The Right Ingredients Baked In Eggs, flour, milk, and sugar. The magic happens when you mix these ingredients together. The same goes for the hottest technologies fast changing how IT impacts our organizations today: cloud, social, mobile, and big data. By themselves they’re pretty good; combining them with a great recipe is what unlocks real transformation power. Choosing the right cloud can be very similar to choosing the right cake. First consider comparing the core ingredients that go into baking a cake and the core design principles in building a cloud-based application. For instance, if flour is the base ingredient of a cake, then rich functionality that spans complete business processes is the base of an enterprise-grade cloud. Cloud computing is more than just consuming an "application as service", and having someone else manage it for you. Rather, the value of cloud is about making your business more agile in the marketplace, and shortening the time it takes to deliver and adopt new innovation. It’s also about improving not only the efficiency at which we communicate but the actual quality of the information shared as well. Data from different systems, like ingredients in a cake, must also be blended together effectively and evaluated through a consolidated lens. When this doesn’t happen, for instance when data in your sales cloud doesn't seamlessly connect with your order management and other “back office” applications, the speed and quality of information can decrease drastically. It’s like mixing ingredients in a strainer with a straw – you just can’t bring it all together without losing something. Mixing ingredients is similar to bringing clouds together, and co-existing cloud applications with traditional on premise applications. This is where a shared services  platform built on open standards and Service Oriented Architecture (SOA) is critical. It’s essentially a cloud recipe that calls for not only great ingredients, but also ingredients you can get locally or most likely already have in your kitchen (or IT shop.) Open standards is the best way to deliver a cost effective, durable application integration strategy – regardless of where your apps are deployed. It’s also the best way to build your own cloud applications, or extend the ones you consume from a third party. Just like using standard ingredients and tools you already have in your kitchen, a standards based cloud enables your IT resources to ensure a cloud works easily with other systems. Your IT staff can also make changes using tools they are already familiar with. Or even more ideal, enable business users to actually tailor their experience without having to call upon IT for help at all. This frees IT resources to focus more on developing new innovative services for the organization vs. run and maintain. Carrying the cake analogy forward, you need to add all the ingredients in before you bake it. The same is true with a modern cloud. To harness the full power of cloud, you can’t leave out some of the most important ingredients and just layer them on top later. This is what a lot of our niche competitors have done when it comes to social, mobile, big data and analytics, and other key technologies impacting the way we do business. The transformational power of these technology trends comes from having a strategy from the get-go that combines them into a winning recipe, and delivers them in a unified way. In looking at ways Oracle’s cloud is different from other clouds – not only is breadth of functionality rich across functional pillars like CRM, HCM, ERP, etc. but it embeds social, mobile, and rich intelligence capabilities where they make the most sense across business processes. This strategy enables the Oracle Cloud to uniquely deliver on all three of these dimensions to help our customers unlock the full power of these transformational technologies.

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  • Is there some application to download files from popular file hosting websites?

    - by Tim
    I was wondering if there are some applications for downloading files from some popular hosting websites, automating the procedure of waiting and fetching links and downloading files, once we give the applications the links? Examples of such websites are Rapidshare, Uploading, Megaupload, Filesonic, Fileserver, Hotfiles, Depositefiles, iFile. But the applications are not necessarily applicable to all of them. Thanks and regards! ADDED: I just tried slimrat. It failed to download files from rapidshare. Can it be because the website of rapidshare has changed recently and the parsing functionality for their website by slimrat is not up-to-date yet.

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  • UppercuT &ndash; Custom Extensions Now With PowerShell and Ruby

    Arguably, one of the most powerful features of UppercuT (UC) is the ability to extend any step of the build process with a pre, post, or replace hook. This customization is done in a separate location from the build so you can upgrade without wondering if you broke the build. There is a hook before each step of the build has run. There is a hook after. And back to power again, there is a replacement hook. If you dont like what the step is doing and/or you want to replace its entire functionality,...Did you know that DotNetSlackers also publishes .net articles written by top known .net Authors? We already have over 80 articles in several categories including Silverlight. Take a look: here.

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  • The New My Oracle Support User Interface (HTML-based)

    - by user793553
    A single source for learning about the latest enhancements to the My Oracle Support User Interface... On January 27, 2012, we launched a new My Oracle Support HTML-based user interface (UI). The new user interface is built using Oracle’s Application Development Framework and is our first step towards providing a single online support portal for our customers and partners; one that all users will transition to in the coming months. Further enhancements to the HTML-based user interface are planned for April 13, 2012. We will transition users of the standard Flash-based interface in the coming months. To help facilitate a smooth transition, we invite you to preview and begin using the new My Oracle Support interface by going to supporthtml.oracle.com and sign in using your Single Sign-on username and password For full information regarding functionality, supported browsers and links to quick and easy videos on how to navigate the new UI, please check out Doc ID 1385682.1 

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