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  • Data Transformation Pipeline

    - by davenewza
    I have create some kind of data pipeline to transform coordinate data into more useful information. Here is the shell of pipeline: public class PositionPipeline { protected List<IPipelineComponent> components; public PositionPipeline() { components = new List<IPipelineComponent>(); } public PositionPipelineEntity Process(Position position) { foreach (var component in components) { position = component.Execute(position); } return position; } public PositionPipeline RegisterComponent(IPipelineComponent component) { components.Add(component); return this; } } Every IPipelineComponent accepts and returns the same type - a PositionPipelineEntity. Code: public interface IPipelineComponent { PositionPipelineEntity Execute(PositionPipelineEntity position); } The PositionPipelineEntity needs to have many properties, many which are unused in certain components and required in others. Some properties will also have become redundant at the end of the pipeline. For example, these components could be executed: TransformCoordinatesComponent: Parse the raw coordinate data into a Coordinate type. DetermineCountryComponent: Determine and stores country code. DetermineOnRoadComponent: Determine and store whether coordinate is on a road. Code: pipeline .RegisterComponent(new TransformCoordinatesComponent()) .RegisterComponent(new DetermineCountryComponent()) .RegisterComponent(new DetermineOnRoadComponent()); pipeline.Process(positionPipelineEntity); The PositionPipelineEntity type: public class PositionPipelineEntity { // Only relevant to the TransformCoordinatesComponent public decimal RawCoordinateLatitude { get; set; } // Only relevant to the TransformCoordinatesComponent public decimal RawCoordinateLongitude { get; set; } // Required by all components after TransformCoordinatesComponent public Coordinate CoordinateLatitude { get; set; } // Required by all components after TransformCoordinatesComponent public Coordinate CoordinateLongitude { get; set; } // Set in DetermineCountryComponent, not required anywhere. // Requires CoordinateLatitude and CoordinateLongitude (TransformCoordinatesComponent) public string CountryCode { get; set; } // Set in DetermineOnRoadComponent, not required anywhere. // Requires CoordinateLatitude and CoordinateLongitude (TransformCoordinatesComponent) public bool OnRoad { get; set; } } Problems: I'm very concerned about the dependency that a component has on properties. The way to solve this would be to create specific types for each component. The problem then is that I cannot chain them together like this. The other problem is the order of components in the pipeline matters. There is some dependency. The current structure does not provide any static or runtime checking for such a thing. Any feedback would be appreciated.

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  • Find Duplicate Items in a Table

    - by Derek Dieter
    A very common scenario when querying tables is the need to find duplicate items within the same table. To do this is simple, it requires utilizing the GROUP BY clause and counting the number of recurrences. For example, lets take a customers table. Within the customers table, we want to find all [...]

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  • New free DotNetNuke 7.0 Skin

    - by Chris Hammond
    With the pending release of DotNetNuke 7, scheduled for this week, I updated my free DotNetNuke (DNN) skin , MultiFunction v1.3 . This latest release requires DotNetNuke 7, it shouldn’t install on an earlier version of DNN. This release updates a number of the CSS classes for DNN 7 specific styles and objects. Overall the design of the skin doesn’t really change much, just cleans up CSS mainly for this release. I also updated to the 3.0 version of the Orangebox jQuery plugin, you can find the code...(read more)

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  • Google I/O 2012 - For Butter or Worse: Smoothing Out Performance in Android UIs

    Google I/O 2012 - For Butter or Worse: Smoothing Out Performance in Android UIs Chet Haase, Romain Guy Great user experience requires buttery smoothness in rendering and animating your interface; your app must have a good, consistent frame rate. This session deep-dives into our work on the Android framework to find and fix performance issues, along with tips on how you can do the same for your applications. For all I/O 2012 sessions, go to developers.google.com From: GoogleDevelopers Views: 4804 116 ratings Time: 58:50 More in Science & Technology

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  • Slowly Changing Dimensions handling in PowerPivot (and BISM?)

    - by Marco Russo (SQLBI)
    During the PowerPivot Workshop in London we received many interesting questions and Alberto had the inspiration to write this nice post about Slowly Changing Dimensions handling in PowerPivot. It is interesting the consideration about SCD Type I attributes in a SCD Type II dimension – you can probably generate them in a more dynamic way in PowerPivot (thanks to Vertipaq and DAX) instead of relying on a relational table containing all the data you need, which usually requires a more complex ETL process....(read more)

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  • Transparent Data Encryption

    Transparent Data Encryption is designed to protect data by encrypting the physical files of the database, rather than the data itself. Its main purpose is to prevent unauthorized access to the data by restoring the files to another server. With Transparent Data Encryption in place, this requires the original encryption certificate and master key. It was introduced in the Enterprise edition of SQL Server 2008. John Magnabosco explains fully, and guides you through the process of setting it up.

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  • Is there any way I can run xampp on 11.10 x64?

    - by Siddhartha
    Running xampp says it requires a 32 bit system. Is there a workaround, or a different software I can use?? I am indeed aware of the lamp-server installation available in Ubuntu, and am currently using it. But I was specifically asking for a integrated LAMP software like xampp which makes it easier to manage the LAMP installation. Currently xampp runs only on x86 systems, and I have a x64 bit install. Hence the question.

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  • Implementing Cluster Continuous Replication, Part 2

    Cluster continuous replication (CCR) helps to provide a more resilient email system with faster recovery. It was introduced in Microsoft Exchange Server 2007 and uses log shipping and failover. configuring Cluster Continuous Replication on a Windows Server 2008 requires different techniques to Windows Server 2003. Brien Posey explains all.

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  • Projects to learn web development

    - by David McDavidson
    I'm trying to get a job as a web developer, but the great majority of jobs offers requires previous experience and a portfolio to prove you've got the required skills. Unfortunately I don't have any real experience or anything to show. The best way to learn is to try and tackle real world problems, so I'd like to know what would be some nice projects to learn stuff and that will look good in a portfolio?

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  • Visual Studio 2012 and Oracle Development Environment

    - by John Paul Cook
    Creating a complete environment for developing .NET applications that target Oracle requires a little planning and understanding of how Oracle connectivity works. You need to be methodical and test along the way so that you aren’t trying to troubleshoot a multitude of interrelated problems at the end. I’ve made several assumptions in writing this post: You are using 64-bit Windows 7 because you are developer with a lot of ram. I think this post will help you even if you are running Windows 8 instead...(read more)

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  • How do I use D3DXVec3Unproject with D3D11?

    - by Miguel P
    I'm having a small issue with D3DXVec3Unproject. I'm currently using Direct3D 11 and not 10, and the signature for this function is: D3DXVECTOR3 *pOut, CONST D3DXVECTOR3 *pV, CONST D3D10_VIEWPORT *pViewport, CONST D3DXMATRIX *pProjection, CONST D3DXMATRIX *pView, CONST D3DXMATRIX *pWorld As you may have noticed, it requires a D3D10_VIEWPORT, and I'm using a Direct3D 11 viewport, D3D11_VIEWPORT. Do you have any ideas how I can use D3DXVec3Unproject with Direct3D 11?

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  • Acer Aspire One and Kernel 2.6.35-25 Freeze

    - by Nerdfest
    I'm having a problem with an Acer Aspire One netbook after the latest kernel upgrade. Basically, doing anything relating to an external monitor locks the trackpad, and in some cases, the keyboard as well. This lock will continue in Gnome even after reboots, and requires battery removal to fix. It does work in the graphical login manager up until the problem occurs the first time. And ideas on settings, etc, that I can change to make it work again?

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  • Uninstall Caribou?

    - by Icedrake
    I just installed the Gnome Tweak Tool in order to change my icon theme to Faenza, but it seems to have installed some other program named Caribou, which I think is an onscreen keyboard program, with it. This is absolutely useless for me, and frankly, I hate the fact that it was installed silently and without my permission. When I go to uninstall it, it says that it's part of gnome-shell and requires the un-installation of that as well. What do I do?

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  • Marketing Your Home Business Opportunity Online Using SEO

    Search engine optimisation (SEO) should be a crucial element of any online selling tactic. Websites which are not properly optimised for search engines will end in a considerable loss in terms of free advertising which is essentially gained from getting a good ranking by search engines. This post will give basic information on what SEO is and will make a case on why marketing your home online business opportunity requires at least some degree of SEO.

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  • It's 2012.. why do we still need hacks like Micro Clearfix to do simple things? [closed]

    - by user72245
    I'm just dipping back into front-end development again. I seriously can't believe we're at "HTML5" yet the most basic thing imaginable - horizontal floating DIVs, still requires crazy esoteric hacks to work correctly? http://nicolasgallagher.com/micro-clearfix-hack/ Like this... why is this necessary? Why can't browsers just grow up and handle 3 dynamically-sized DIVs floating horizontally in a container row?

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  • You're invited : Oracle Solaris Forum, Dec 18th, Petah Tikva

    - by Frederic Pariente
    The local ISV Engineering will be attending and speaking at the Oracle and ilOUG Solaris Forum next week in Israel. Come meet us there! This free event requires registration, thanks. YOU'RE INVITED Oracle Solaris Forum Date : Tuesday, December 18th, 2012 Time : 14:00 Location :  Dan Academic CenterPetach TikvaIsrael Agenda : New Features in Solaris 11.1SPARC T4 & T5Solaris 11 Serviceability See you there!

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  • JavaOne Community Keynote Videos

    - by Tori Wieldt
    If you weren't able to attend JavaOne 2012 in San Francisco, one of the high points was the Community Keynote on the last day. It was by the community and for the community. It included a visit from James Goling, demos, and community members describing what they've been up to. You can watch highlights: or watch the full keynote: The continued innovation of Java requires the full engagement, participation, and collaboration of the Java community. Well done!

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  • Building a Social Website

    A social website built for internet marketing purposes is often categorized under "niche marketing" because it is difficult to construct one that can encompass the general public. Building a social website of that magnitude is a matter that requires resources not readily available to everyone. It is therefore assumed that any plans of building a social web network will be relatively small and confined to a certain niche in the global demography.

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  • SEO As the Online Business Traffic Driver

    The SEO means that the online business marketer can drive his site or blog to the top places at the search engine result pages with the selected keywords. This requires, that a marketer knows the search engine algorithm, i.e. according to which criteria the engine will put the sites in a certain order.

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  • Error installing Rails on Ubuntu 11.10 (Gem::DependencyError)

    - by Paulo Cassiano
    I'm trying to install Ruby on Rails on Ubuntu 11.10, but receiving this error: $ sudo gem install rails ERROR: While executing gem ... (Gem::DependencyError) Unable to resolve dependencies: rails requires activesupport (= 3.2.3), actionpack (= 3.2.3), activerecord (= 3.2.3), activeresource (= 3.2.3), actionmailer (= 3.2.3), railties (= 3.2.3) How can I fix this? Note: Git (1.7.5.4 ) and Ruby (1.9.2p290) are installed properly.

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  • &amp;#65279;Five Simple Photo Fixes with digiKam

    <b>Linux Magazine: </b>"digiKam is an immensely powerful photo application, so learning all its features requires time and effort. But this capable photo management application also offers a few easy to use features which you can use to instantly improve your shots."

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  • Stairway to T-SQL DML Level 5: The Mathematics of SQL: Part 2

    Joining tables is a crucial concept to understanding data relationships in a relational database. When you are working with your SQL Server data, you will often need to join tables to produce the results your application requires. Having a good understanding of set theory, and the mathematical operators available and how they are used to join tables will make it easier for you to retrieve the data you need from SQL Server.

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  • More elegant way to avoid hard coding the format of a a CSV file?

    - by dsollen
    I know this is trivial issue, but I just feel this can be more elegant. So I need to write/read data files for my program, lets say they are CSV for now. I can implement the format as I see fit, but I may have need to change that format later. The simply thing to do is something like out.write(For.getValue()+","+bar.getMinValue()+","+fi.toString()); This is easy to write, but obviously is guilty of hard coding and the general 'magic number' issue. The format is hard-coded, requires parsing of the code to figure out the file format, and changing the format requires changing multiple methods. I could instead have my constants specifying the location that I want each variable to be saved in the CSV file to remove some of the 'magic numbers'; then save/load into the an array at the location specified by the constants: int FOO_LOCATION=0; int BAR_MIN_VAL_LOCATION=1; int FI_LOCATION=2 int NUM_ARGUMENTS=3; String[] outputArguments=new String[NUM_ARGUMENTS]; outputArguments[FOO_LOCATION] = foo.getValue(); outputArgumetns[BAR_MIN_VAL_LOCATION] = bar.getMinValue(); outptArguments[FI_LOCATOIN==fi.toString(); writeAsCSV(outputArguments); But this is...extremely verbose and still a bit ugly. It makes it easy to see the format of existing CSV and to swap the location of variables within the file easily. However, if I decide to add an extra value to the csv I need to not only add a new constant, but also modify the read and write methods to add the logic that actually saves/reads the argument from the array; I still have to hunt down every method using these variables and change them by hand! If I use Java enums I can clean this up slightly, but the real issue is still present. Short of some sort of functional programming (and java's inner classes are too ugly to be considered functional) I still have no obvious way of clearly expressing what variable is associated with each constant short of writing (and maintaining) it in the read/write methods. For instance I still need to write somewhere that the FOO_LOCATION specifies the location of foo.getValue(). It seems as if there should be a prettier, easier to maintain, manner for approaching this? Incidentally, I'm working in java at the moment, however, I am interested conceptually about the design approach regardless of language. Some library in java that does all the work for me is definitely welcome (though it may prove more hassle to get permission to add it to the codebase then to just write something by hand quickly), but what I'm really asking is more about how to write elegant code if you had to do this by hand.

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