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• Finding the Value in SOA by Stephen Bennett

  - by J Swaroop

  Here's an excerpt from a very interesting article on CIO update titled "Finding the value in SOA" by Stephen Bennett of Oracle "Because of this, SOA must not be seen as a solution development approach that starts and ends once a solution is delivered. It must be seen as an on-going process that, when coupled with a strategic framework, can change and evolve with the business over time. Unfortunately, many enterprises adopt SOA without utilizing a strategic framework, causing a host of challenges for their business. Just a few of the challenges I have seen include: More complexity and moving parts Increased costs Projects taking longer than before Solutions more fragile than ever Little or no agility Difficulty identifying and discovering services Exponentially growing governance challenges Limited service re-use Duplication of effort leading to service sprawl Multiple siloed technology focused SOAs Funding for service oriented projects being cut" Read the complete article

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• Confusion for mime files: magic, magic.mgc, magic.mime

  - by Florence Foo

  I'm using Ubuntu. I'm trying to use ruby gem 'shared-mime-info' for an application I'm writing. I understand that magic.mgc is a compiled version of magic file which has magic number definitions for the different file types. BUT I don't understand why is it /usr/share/mime/magic is in binary format instead of just normal text file with each parameters separated by white space like everywhere else I'm finding on the internet when it's referencing this file? The /usr/share/mime/magic has the word 'MIME-Magic' at the beginning of the file and prioritize the rest of the stuff like. So it doesn't look like magic.mgc at all. [100:application/vnd.scribus] >1=^@^KSCRIBUSUTF8 [90:application/vnd.stardivision.writer] >2089=^@ shared-mime-info seems to want a magic file in the binary non compiled format as above and I wanted to add definition for DOCX but how does one update or generate this file without using a hex editor? There is a reference to the magic file I found at: http://standards.freedesktop.org/shared-mime-info-spec/shared-mime-info-spec-latest.html And it mention this file is updated with update-mime-database but what if I just want to add some new entry to it. hex editor? Anyway I ended up using hexer to make a new magic file in ~/.local/share/mime/ with only the entry I wanted to add and the MIME-Magic header. Seems to work (assuming I will ever deal with docx for now). 00000000: 4d 49 4d 45 2d 4d 61 67 69 63 00 0a 5b 36 30 3a MIME-Magic..[60: 00000010: 61 70 70 6c 69 63 61 74 69 6f 6e 2f 76 6e 64 2e application/vnd. 00000020: 6f 70 65 6e 78 6d 6c 66 6f 72 6d 61 74 73 2d 6f openxmlformats-o 00000030: 66 66 69 63 65 64 6f 63 75 6d 65 6e 74 2e 77 6f fficedocument.wo 00000040: 72 64 70 72 6f 63 65 73 73 69 6e 67 6d 6c 2e 64 rdprocessingml.d 00000050: 6f 63 75 6d 65 6e 74 5d 0a 3e 30 3d 00 08 50 4b ocument].>0=..PK 00000060: 03 04 14 00 06 00 0a -- -- -- -- -- -- -- -- -- .......---------

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• Unlock the Full Value of Oracle CRM On Demand

  - by charles.knapp

  Register for this live Oracle CRM On Demand Virtual Community Session! Oracle CRM On Demand delivers the most complete On Demand CRM available anywhere. But how can you ensure you are getting maximum value from the many powerful features that Oracle CRM On Demand offers? Join our interactive Oracle CRM On Demand Virtual Community Session on Tuesday, January 11, 2011 from 10.00-11 a.m. PT / 1 p.m.-2 p.m. ET to get expert advice and discuss the best ways to unlock the full potential of Oracle CRM Demand with Mike Lairson, author of 'Oracle CRM On Demand Reporting'. Book OfferSend your Oracle CRM On Demand configuration ideas before the Webcast to [email protected] and you could win a free copy of 'Oracle CRM On Demand Reporting' by Mike Lairson. Learn more and register now!

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• Unlock the Full Value of Oracle CRM On Demand

  - by ruth.donohue

  Register for this live Oracle CRM On Demand Virtual Community Session! Oracle CRM On Demand delivers the most complete On Demand CRM solution on the market. But how can you ensure you are getting maximum value from the many powerful features that Oracle CRM On Demand offers? Join our interactive Oracle CRM On Demand Virtual Community Session on Tuesday, January 11, 2011 from 10.00-11 a.m. PT / 1 p.m.-2 p.m. ET to get expert advice and discuss the best ways to unlock the full potential of Oracle CRM Demand with Mike Lairson, author of 'Oracle CRM On Demand Reporting'. Book Offer Send your Oracle CRM On Demand configuration ideas before the Webcast to [email protected] and you could win a free copy of 'Oracle CRM On Demand Reporting' by Mike Lairson. Learn more and register now!

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• C# 4.0: Covariance And Contravariance In Generics

  - by Paulo Morgado

  C# 4.0 (and .NET 4.0) introduced covariance and contravariance to generic interfaces and delegates. But what is this variance thing? According to Wikipedia, in multilinear algebra and tensor analysis, covariance and contravariance describe how the quantitative description of certain geometrical or physical entities changes when passing from one coordinate system to another.(*) But what does this have to do with C# or .NET? In type theory, a the type T is greater (>) than type S if S is a subtype (derives from) T, which means that there is a quantitative description for types in a type hierarchy. So, how does covariance and contravariance apply to C# (and .NET) generic types? In C# (and .NET), variance applies to generic type parameters and not to the resulting generic type. A generic type parameter is: covariant if the ordering of the generic types follows the ordering of the generic type parameters: Generic<T> = Generic<S> for T = S. contravariant if the ordering of the generic types is reversed from the ordering of the generic type parameters: Generic<T> = Generic<S> for T = S. invariant if neither of the above apply. If this definition is applied to arrays, we can see that arrays have always been covariant because this is valid code: object[] objectArray = new string[] { "string 1", "string 2" }; objectArray[0] = "string 3"; objectArray[1] = new object(); However, when we try to run this code, the second assignment will throw an ArrayTypeMismatchException. Although the compiler was fooled into thinking this was valid code because an object is being assigned to an element of an array of object, at run time, there is always a type check to guarantee that the runtime type of the definition of the elements of the array is greater or equal to the instance being assigned to the element. In the above example, because the runtime type of the array is array of string, the first assignment of array elements is valid because string = string and the second is invalid because string = object. This leads to the conclusion that, although arrays have always been covariant, they are not safely covariant – code that compiles is not guaranteed to run without errors. In C#, the way to define that a generic type parameter as covariant is using the out generic modifier: public interface IEnumerable<out T> { IEnumerator<T> GetEnumerator(); } public interface IEnumerator<out T> { T Current { get; } bool MoveNext(); } Notice the convenient use the pre-existing out keyword. Besides the benefit of not having to remember a new hypothetic covariant keyword, out is easier to remember because it defines that the generic type parameter can only appear in output positions — read-only properties and method return values. In a similar way, the way to define a type parameter as contravariant is using the in generic modifier: public interface IComparer<in T> { int Compare(T x, T y); } Once again, the use of the pre-existing in keyword makes it easier to remember that the generic type parameter can only be used in input positions — write-only properties and method non ref and non out parameters. Because covariance and contravariance apply only to the generic type parameters, a generic type definition can have both covariant and contravariant generic type parameters in its definition: public delegate TResult Func<in T, out TResult>(T arg); A generic type parameter that is not marked covariant (out) or contravariant (in) is invariant. All the types in the .NET Framework where variance could be applied to its generic type parameters have been modified to take advantage of this new feature. In summary, the rules for variance in C# (and .NET) are: Variance in type parameters are restricted to generic interface and generic delegate types. A generic interface or generic delegate type can have both covariant and contravariant type parameters. Variance applies only to reference types; if you specify a value type for a variant type parameter, that type parameter is invariant for the resulting constructed type. Variance does not apply to delegate combination. That is, given two delegates of types Action<Derived> and Action<Base>, you cannot combine the second delegate with the first although the result would be type safe. Variance allows the second delegate to be assigned to a variable of type Action<Derived>, but delegates can combine only if their types match exactly. If you want to learn more about variance in C# (and .NET), you can always read: Covariance and Contravariance in Generics — MSDN Library Exact rules for variance validity — Eric Lippert Events get a little overhaul in C# 4, Afterward: Effective Events — Chris Burrows Note: Because variance is a feature of .NET 4.0 and not only of C# 4.0, all this also applies to Visual Basic 10.

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• How to pass value from child window to parent window without refreshing the page using MasterPage

  - by Suthish Nair

  Parent Window (1.aspx) <asp:Content ID="Content1" ContentPlaceHolderID="head" Runat="Server"> <script type ="text/javascript"> function popup() { window.open('2.aspx', '', "height=500, width=500,resizable=no, toolbar =no"); } </script> </asp:Content> <asp:Content ID="Content2" ContentPlaceHolderID="ContentPlaceHolder1" Runat="Server"> Text Box1:&nbsp;<asp:TextBox ID...(read more)

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• Mission critical embedded language

  - by Moe

  Maybe the question sounds a bit strange, so i'll explain a the background a little bit. Currently i'm working on a project at y university, which will be a complete on-board software for an satellite. The system is programmed in c++ on top of a real-time operating system. However, some subsystems like the attitude control system and the fault detection and a space simulation are currently only implemented in Matlab/Simulink, to prototype the algorithms efficiently. After their verification, they will be translated into c++. The complete on-board software grew very complex, and only a handful people know the whole system. Furthermore, many of the students haven't program in c++ yet and the manual memory management of c++ makes it even more difficult to write mission critical software. Of course the main system has to be implemented in c++, but i asked myself if it's maybe possible to use an embedded language to implement the subsystem which are currently written in Matlab. This embedded language should feature: static/strong typing and compiler checks to minimize runtime errors small memory usage, and relative fast runtime attitude control algorithms are mainly numerical computations, so a good numeric support would be nice maybe some sort of functional programming feature, matlab/simulink encourage you to use it too I googled a bit, but only found Lua. It looks nice, but i would not use it in mission critical software. Have you ever encountered a situation like this, or do you know any language, which could satisfies the conditions? EDIT: To clarify some things: embedded means it should be able to embed the language into the existing c++ environment. So no compiled languages like Ada or Haskell ;)

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• Question about casting a class in Java with generics

  - by Florian F

  In Java 6 Class<? extends ArrayList<?>> a = ArrayList.class; gives and error, but Class<? extends ArrayList<?>> b = (Class<? extends ArrayList<?>>)ArrayList.class; gives a warning. Why is (a) an error? What is it, that Java needs to do in the assignment, if not the cast shown in (b)? And why isn't ArrayList compatible with ArrayList? I know one is "raw" and the other is "generic", but what is it you can do with an ArrayList and not with an ArrayList, or the other way around?

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• Matrix Pattern Recognition Algorithm

  - by Andres

  I am designing a logic analyzer and I would like to implement some Matrix Algorithm. I have several channels each one represented by a row in the matrix and every element in the column would be the state, for example: Channel 1 1 0 0 1 0 1 1 0 1 Channel 2 1 1 0 1 1 0 0 1 1 Channel 3 0 1 0 1 1 0 1 0 0 Channel 4 0 0 1 0 0 1 0 0 1 I would like to detect a pattern inside my matrix for example, detect if exist and where the sub-matrix or pattern: 1 0 1 1 I think it can be accomplished testing element by element but I think there should be a better way of doing it. Is there any Java API or any way to do it ? If there is a API ARM optimized for NEON instructions would be great also but not mandatory. Thank you very much in advance.

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• Friday Spotlight: The Value of Oracle Linux

  - by Chris Kawalek

  Happy Friday! Our spotlight this week is on a brand new white paper, chock full of fantastic information about Oracle Linux. From the intro to Oracle Linux - Maximize Value, Minimize Cost: "This paper describes the savings and efficiencies that an IT department can realize by choosing Oracle Linux as their enterprise standard. It highlights sample deployments and explains how deploying Oracle Linux can reduce operational costs and result in less downtime, improved productivity, and greater opportunities for revenue generation.?" The paper explains exactly how Oracle Linux can reduce costs, and goes into some of the features of Oracle Linux that can make it more valuable for your organization. Read the paper now. Have a great week! -Chris 

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• Firefox application associations not working

  - by Pavlos G.

  No matter what changes i make to file associations (actions) in the 'Applications' tab in firefox, they're totally ignored. For example, i set .wmv and .avi files to open with 'smplayer' but when i download a file and double-click on it (through the 'Downloads' window), it keeps opening with Totem player. I've tried to delete and recreate mimetypes.rdf but that didn't help. Any ideas on what else should i check?

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• ubuntu 12.04.3 - Reverse DNS issue - slow ping interval but normal ping value

  - by McArthor Lee

  i'm running ubuntu 12.04.3 x86 desktop in my corporation environment. I join the corp domain by Likewise open. But when I ping another pc, say hostname is pc-test, "ping pc-test" or "ping pc-test.domain.name" returns slow interval (about 5 seconds) but the ping value is below 1 ms. When I use "ping -n pc-test", everything works well. So I conclude this is about reverse DNS issue. how to fix this issue? many thanks! Edit: In my understanding, reverse DNS issue is related to DNS server or Wins server, not only an ubuntu issue, is this right? if I wanna fix this issue as much as possible on ubuntu but not on network servers, what to do?

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• Leveraging Blueprints to Easily Extend the Value of Your Investment in Oracle GRC Applications

  Hundreds of customers globally have invested in Oracle GRC Applications to help solve mission-critical compliance and risk management challenges. To further extend the value of these investments, Oracle is introducing blueprints for Oracle GRC applications. Oracle GRC Application Blueprints deliver ready-to-use best practice content that represents thousands of hours of experience from Oracle and from Oracle partners and customers. Each blueprint can include pre-defined content, pre-packaged integrations, sample code, and application configurations, and are immediately available to download free of charge from the Oracle Technology Network. Listen to this appcast and learn what blueprints are available today and how you can contribute your own blueprints for Oracle GRC Applications.

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• 3 Weeks Left to Save $100 for the Oracle Value Chain Summit

  - by Stephen Slade

  Projected to be sellout event, for the next 3 weeks you can save $100 with the Early-Bird Registration rate for the Oracle Value Chain Summit. Attend and experience 6 pillar product Conferences under one roof. Bring your supply chain team and receive a group discount (4+ attendees).  The site hotel has a dedicated room block (at a discounted rate) that is filling fast - so be sure to take advantage of these great offers! A new agenda was just published this week with an exciting lineup of best practices and success stories that I'm sure many of you can benefit from. REGISTER_TODAY!

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• Optimization ended up in casting an object at each method call

  - by Aybe

  I've been doing some optimization for the following piece of code : public void DrawLine(int x1, int y1, int x2, int y2, int color) { _bitmap.DrawLineBresenham(x1, y1, x2, y2, color); } After profiling it about 70% of the time spent was in getting a context for drawing and disposing it. I ended up sketching the following overload : public void DrawLine(int x1, int y1, int x2, int y2, int color, BitmapContext bitmapContext) { _bitmap.DrawLineBresenham(x1, y1, x2, y2, color, bitmapContext); } Until here no problems, all the user has to do is to pass a context and performance is really great as a context is created/disposed one time only (previously it was a thousand times per second). The next step was to make it generic in the sense it doesn't depend on a particular framework for rendering (besides .NET obvisouly). So I wrote this method : public void DrawLine(int x1, int y1, int x2, int y2, int color, IDisposable bitmapContext) { _bitmap.DrawLineBresenham(x1, y1, x2, y2, color, (BitmapContext)bitmapContext); } Now every time a line is drawn the generic context is casted, this was unexpected for me. Are there any approaches for fixing this design issue ? Note : _bitmap is a WriteableBitmap from WPF BitmapContext is from WriteableBitmapEx library DrawLineBresenham is an extension method from WriteableBitmapEx

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• SQL SERVER – A Puzzle Part 2 – Fun with SEQUENCE in SQL Server 2012 – Guess the Next Value

  - by pinaldave

  Before continuing this blog post – please read the first part of the SEQUENCE Puzzle here A Puzzle – Fun with SEQUENCE in SQL Server 2012 – Guess the Next Value. Where we played a simple guessing game about predicting next value. The answers the of puzzle is shared on the blog posts as a comment. Now here is the next puzzle based on yesterday’s puzzle. First execute the script which I have written here. The only difference between yesterday’s script is that I have removed the MINVALUE as 1 from the syntax. Now guess what will be the next value as requested in the query. USE TempDB GO -- Create sequence CREATE SEQUENCE dbo.SequenceID AS BIGINT START WITH 3 INCREMENT BY 1 MAXVALUE 5 CYCLE NO CACHE; GO -- Following will return 3 SELECT next value FOR dbo.SequenceID; -- Following will return 4 SELECT next value FOR dbo.SequenceID; -- Following will return 5 SELECT next value FOR dbo.SequenceID; -- Following will return which number SELECT next value FOR dbo.SequenceID; -- Clean up DROP SEQUENCE dbo.SequenceID; GO Above script gave me following resultset. 3 is the starting value and 5 is the maximum value. Once Sequence reaches to maximum value what happens? and WHY? I (kindly) suggest you try to attempt to answer this question without running this code in SQL Server 2012. I am very confident that irrespective of SQL Server version you are running you will have great learning. I will follow up of the answer in comments below. Recently my friend Vinod Kumar wrote excellent blog post on SQL Server 2012: Using SEQUENCE, you can head over there for learning sequence in details. Reference: Pinal Dave (http://blog.sqlauthority.com) Filed under: PostADay, SQL, SQL Authority, SQL Puzzle, SQL Query, SQL Server, SQL Tips and Tricks, T SQL, Technology

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• Rotate a vector by given degrees (errors when value over 90)

  - by Ivan

  I created a function to rotate a vector by a given number of degrees. It seems to work fine when given values in the range -90 to +90. Beyond this, the amount of rotation decreases, i.e., I think objects are rotating the same amount for 80 and 100 degrees. I think this diagram might be a clue to my problem, but I don't quite understand what it's showing. Must I use a different trig function depending on the radians value? The programming examples I've been able to find look similar to mine (not varying the trig functions). Vector2D.prototype.rotate = function(angleDegrees) { var radians = angleDegrees * (Math.PI / 180); var ca = Math.cos(radians); var sa = Math.sin(radians); var rx = this.x*ca - this.y*sa; var ry = this.x*sa + this.y*ca; this.x = rx; this.y = ry; };

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• HTML5 valid Google+ Button - Bad value publisher for attribute rel

  - by mrtsherman

  I recently migrated my website from xhtml transitional to html5. Specifically so that I could make use of valid block level anchor tags. <a><div /></a>. When running validation I encountered the following error: Bad value publisher for attribute rel on element link: Keyword publisher is not registered. But according to this page, that is exactly what I am supposed to do. https://developers.google.com/+/plugins/badge/#connect My code: <link href="https://plus.google.com/xxxxxxxxxxxxxxxx" rel="publisher" /> <a href="https://plus.google.com/xxxxxxxxxxxxxxx?prsrc=3" style="text-decoration:none;"> <img src="https://ssl.gstatic.com/images/icons/gplus-16.png" alt="" style="border:0;width:16px;height:16px;"/> </a> I can't figure out how to implement this in an html5 compliant way. Can anyone help?

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• Web browser downloads only open target folders - cannot open files

  - by Pavlos G.

  After installing xubuntu packages in order to check xfce, I reverted back to gnome2. During the first login, I noticed that thunar was now selected as the default file manager. Preferred applications menu is also missing now, so I could not set nautilus as the default. I removed all the xubuntu packages (including thunar) and then when I tried to open a folder, I was asked to select the default file manager - that's how I got nautilus back. The next problem I'm now facing has to do with the downloaded files from web browsers: Open and Open containing folder options produce exactly the same result. If I double-click on a file, it'll just open the containing folder, instead of opening the file with it's associated application (e.g. libreoffice writer for .doc,.odt, smplayer for .avi,.wmv, etc). The problem happens both in Firefox and Chrome. Through nautilus, all files open correctly. Up until now I've tried the following: Delete/recreate mimeTypes.rdf in my FF profile Create a new profile in FF Delete/recreate ~/.local/share/applications/mimeapps.list Already checked this similar article None of them worked. Any ideas on the issue would be appreciated.

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• Extending the Value of Your Oracle Financials Applications Investment with Document Capture, Imaging and Workflow

  Learn how Oracles end-to-end document imaging system extends the value and increases the automation of your Oracle Financials applications by using intelligent capture and imaging technologies to streamline high volume operations like accounts payable. Oracle Imaging and Process Management 11g (Oracle I/PM 11g) offers an integrated system that digitizes paper invoices, intelligently extracts header information and line item details, initiates automated workflows, and enables in-context access to imaged invoices directly from Oracle Applications, including Oracle E-Business Suite Financials and PeopleSoft Enterprise Financial Management. Come hear more about these certfied, standards-based application integrations as well as how document imaging can help your organization achieve quick, measurable ROI, by increasing efficiencies across financial departments, and reducing costs related to paper storage and handling.

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• Algorithm to match items be value into sets base on total

  - by Ben

  Given n sets of items. Each item has a value. The items in a set have similar values but vary by a small amount. The goal is to create new sets containing three items selected from the original sets such that the total of the values is within a given range. Only one item a source set can be selected. For example: If we have the following starting sets: Set A - { 4.0, 3.8, 4.2 } Set B - { 7.0, 6.8, 7.2 } Set C - { 1.0, 0.9, 1.1 } Set D - { 6.5, 6.4, 6.6 } Set E - { 2.5, 2.4, 2.6 } Goal is to create sets containing three elements such that the total is between 11.9 and 12.1. For example { 3.8, 7.2, 1.0 } There can be unused elements. Can someone suggest an algorithm for this problem?

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• Dynamically vs Statically typed languages studies

  - by Winston Ewert

  Do there exist studies done on the effectiveness of statically vs dynamically typed languages? In particular: Measurements of programmer productivity Defect Rate Also including the effects of whether or not unit testing is employed. I've seen lots of discussion of the merits of either side but I'm wondering whether anyone has done a study on it. Edit Sadly, only one of the papers shown is actually a study and it does nothing but conclude that the language matters. This leads me to ponder: what if I proposed doing such a study with volunteers from this site?

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• How to change mimetype image for PSD file (Photoshop)?

  - by ubuntico

  Following this link https://help.ubuntu.com/community/AddingMimeTypes, I first typed a command to discover the mimetype for psd extension ~$ grep 'psd' /etc/mime.types image/x-photoshop psd Then I took Photoshop CS5 SVG image from Wikipedia and renamed it to image-x-photoshop.svg. Then I copied the file to the folder /usr/share/icons/gnome/scalable via command sudo cp image-x-photoshop.svg /usr/share/icons/gnome/scalable/image-x-photoshop.svg Loogged out, logged in, but the icon for the .psd files is still unchanged. Does anyone know what I am doing wrong? I use Ubuntu 10.10. Thanks in advance

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• Resize images to specific height value in ImageMagick?

  - by Jason

  I've looked around for this, and can't find an easily implemented solution. Currently I'm working on an application that deals with panoramas. As they come out of the batch stitch process, the dimensions average 18000x4000. Using ImageMagick, how can I downscale those images to a specific height value while maintaining aspect ratio? According to the manual, the convert operation takes in both height and width to resize to while maintaining the same aspect ratio. What I'd like is to put in 600 and 1000 in my existing resize script function and have both a regular viewable image as well as a reduced size.

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• Unity: Assigning String value in inspector

  - by Marc Pilgaard

  I got an issue with Unity I can't seem to comprehend, and it is possibly very simple: I am trying to write a simple piece of code in JavaScript where a button toggles the activation of a shield, by dragging a prefab with Resources.load("ActivateShieldPreFab") and destroying it again (Haven't implemented that yet). I wish to assign this button through the inspector, so I have created a string variable which appears as intended in the inspector. Though it doesn't seem to register the inspector input, even though I changed the value through the inspector. It only provides the error: "Input Key named: is unknown" When the button name is assigned within the code, there is no issues. Code as follows: var ShieldOn = false; var stringbutton : String; function Start(){ } function Update () { if(Input.GetKey(stringbutton) && ShieldOn != true) { Instantiate(Resources.load("ActivateShieldPreFab"), Vector3 (0, 0, 0), Quaternion.identity); ShieldOn = true; } } Hope somebody can help, in advance... Thanks

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