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• How To Export/Import a Website in IIS 7.x

  - by Tray Harrison

  IIS 6 had a great feature called ‘Save Configuration to a File’ which would allow you to easily export a website’s configuration, to be later used to import either on the same server or another box.  This came in handy anytime you wanted to duplicate a site in order to do some testing without impacting the existing application.  So naturally, Microsoft decided to do away with this feature in IIS 7. The process to export/import a site is still fairly simple, though not as obvious as it was in previous versions.  Here are the steps: 1. Open a command prompt and navigate to C:\Windows\System32\inetsrv and run the following command: appcmd list site /name:<sitename> /config /xml > C:\output.xml So if you were wanting to export a website named EAC, you would run the following: If you’ll be setting up another copy of the site on the same server, you’ll now need to edit the output.xml file before importing it.  This is necessary in order to avoid conflicts such as bindings, Site ID, etc.  To do this, edit the XML and change the values.  Go ahead and make a copy of the home directory, and rename it to whatever folder name you specified in the output – /EAC2 in this example.  If you decide to change the app pool, make sure you go ahead and create the new app pool as well. Once these edits have been made, we are now ready to import the site.  To do that run: appcmd add sites /in < c:\output.xml So for our example it would look like this: That’s it.  You should now see your site listed when opening up Inet Manager.  If for some reason the site fails to start, that’s probably because you forgot to create the new app pool or there is a problem with one of the other parameters you changed.  Look at the System log to identify any issues like this.

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• Dealing with the node callback pyramid

  - by thecoop

  I've just started using node, and one thing I've quickly noticed is how quickly callbacks can build up to a silly level of indentation: doStuff(arg1, arg2, function(err, result) { doMoreStuff(arg3, arg4, function(err, result) { doEvenMoreStuff(arg5, arg6, function(err, result) { omgHowDidIGetHere(); }); }); }); The official style guide says to put each callback in a separate function, but that seems overly restrictive on the use of closures, and making a single object declared in the top level available several layers down, as the object has to be passed through all the intermediate callbacks. Is it ok to use function scope to help here? Put all the callback functions that need access to a global-ish object inside a function that declares that object, so it goes into a closure? function topLevelFunction(globalishObject, callback) { function doMoreStuffImpl(err, result) { doMoreStuff(arg5, arg6, function(err, result) { callback(null, globalishObject); }); } doStuff(arg1, arg2, doMoreStuffImpl); } and so on for several more layers... Or are there frameworks etc to help reduce the levels of indentation without declaring a named function for every single callback? How do you deal with the callback pyramid?

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• PDFtk Password Protection Help

  - by Dave W.

  I am using Ubuntu 11.10 and am looking for a solution to password protect a bunch of pdf files in a directory in batch. I came across PDFtk and it looks like it might do what I need, but I've reviewed the command line PDFtk examples and can't figure out if there is a way to do it in batch without having to individually specify the output file name for every file. I'm hoping a command-line guru can take a look at the PDFtk syntax and tell me if there is some trick / command that will allow me to password protect a directory of pdf files (e.g., *.pdf) and overwrite the existing files using the same name, or consistently rename the individual output files without having to specify each output name individually. Here's a link to the PDFtk command line examples page: http://www.pdflabs.com/tools/pdftk-the-pdf-toolkit/ Thanks for your help. I think I've answered my own question. Here's a bash script that appears to do the trick. I'd welcome help evaluating why the code I've commented out doesn't work... #!/bin/bash # Created by Dave, 2012-02-23 # This script uses PDFtk to password protect every PDF file # in the directory specified. The script creates a directory named "protected_[DATE]" # to hold the password protected version of the files. # # I'm using the "user_pw" parameter, # which means no one will be able to open or view the file without # the password. # # PDFtk must be installed for this script to work. # # Usage: ./protect_with_pdftk.bsh [FILE(S)] # [FILE(S)] can use wildcard expansion (e.g., *.pdf) # This part isn't working.... ignore. The goal is to avoid errors if the # directory to be created already exists by only attempting to create # it if it doesn't exists # #TARGET_DIR="protected_$(date +%F)" #if [ -d "$TARGET_DIR" ] #then #echo # echo "$TARGET_DIR directory exists!" #else #echo # echo "$TARGET_DIR directory does not exist!" #fi # mkdir protected_$(date +%F) for i in *pdf ; do pdftk "$i" output "./protected_$(date +%F)/$i" user_pw [PASSWORD]; done echo "Complete. Output is in the directory: ./protected_$(date +%F)"

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• Customizing the Test Status on the TFS 2010 SSRS Stories Overview Report

  - by Bob Hardister

  This post shows how to customize the SQL query used by the Team Foundation Server 2010 SQL Server Reporting Services (SSRS) Stories Overview Report. The objective is to show test status for the current version while including user story status of the current and prior versions.  Why? Because we don’t copy completed user stories into the next release. We only want one instance of a user story for the product because we believe copies can get out of sync when they are supposed to be the same. In the example below, work items for the current version are on the area path root and prior versions are not on the area path root. However, you can use area path or iteration path criteria in the query as suits your needs. In any case, here’s how you do it: 1. Download a copy of the report RDL file as a backup 2. Open the report by clicking the edit down arrow and selecting “Edit in Report Builder” 3. Right click on the dsOverview Dataset and select Dataset Properties 4. Update the following SQL per the comments in the code: Customization 1 of 3 … -- Get the list deliverable workitems that have Test Cases linked DECLARE @TestCases Table (DeliverableID int, TestCaseID int); INSERT @TestCases     SELECT h.ID, flh.TargetWorkItemID     FROM @Hierarchy h         JOIN FactWorkItemLinkHistory flh             ON flh.SourceWorkItemID = h.ID                 AND flh.WorkItemLinkTypeSK = @TestedByLinkTypeSK                 AND flh.RemovedDate = CONVERT(DATETIME, '9999', 126)                 AND flh.TeamProjectCollectionSK = @TeamProjectCollectionSK         JOIN [CurrentWorkItemView] wi ON flh.TargetWorkItemID = wi.[System_ID]                  AND wi.[System_WorkItemType] = @TestCase             AND wi.ProjectNodeGUID  = @ProjectGuid              --  Customization 1 of 3: only include test status information when test case area path = root. Added the following 2 statements              AND wi.AreaPath = '{the root area path of the team project}'  …          Customization 2 of 3 … -- Get the Bugs linked to the deliverable workitems directly DECLARE @Bugs Table (ID int, ActiveBugs int, ResolvedBugs int, ClosedBugs int, ProposedBugs int) INSERT @Bugs     SELECT h.ID,         SUM (CASE WHEN wi.[System_State] = @Active THEN 1 ELSE 0 END) Active,         SUM (CASE WHEN wi.[System_State] = @Resolved THEN 1 ELSE 0 END) Resolved,         SUM (CASE WHEN wi.[System_State] = @Closed THEN 1 ELSE 0 END) Closed,         SUM (CASE WHEN wi.[System_State] = @Proposed THEN 1 ELSE 0 END) Proposed     FROM @Hierarchy h         JOIN FactWorkItemLinkHistory flh             ON flh.SourceWorkItemID = h.ID             AND flh.TeamProjectCollectionSK = @TeamProjectCollectionSK         JOIN [CurrentWorkItemView] wi             ON wi.[System_WorkItemType] = @Bug             AND wi.[System_Id] = flh.TargetWorkItemID             AND flh.RemovedDate = CONVERT(DATETIME, '9999', 126)             AND wi.[ProjectNodeGUID] = @ProjectGuid              --  Customization 2 of 3: only include test status information when test case area path = root. Added the following statement              AND wi.AreaPath = '{the root area path of the team project}'       GROUP BY h.ID … Customization 2 of 3 … -- Add the Bugs linked to the Test Cases which are linked to the deliverable workitems -- Walks the links from the user stories to test cases (via the tested by link), and then to -- bugs that are linked to the test case. We don't need to join to the test case in the work -- item history view. -- --    [WIT:User Story/Requirement] --> [Link:Tested By]--> [Link:any type] --> [WIT:Bug] INSERT @Bugs SELECT tc.DeliverableID,     SUM (CASE WHEN wi.[System_State] = @Active THEN 1 ELSE 0 END) Active,     SUM (CASE WHEN wi.[System_State] = @Resolved THEN 1 ELSE 0 END) Resolved,     SUM (CASE WHEN wi.[System_State] = @Closed THEN 1 ELSE 0 END) Closed,     SUM (CASE WHEN wi.[System_State] = @Proposed THEN 1 ELSE 0 END) Proposed FROM @TestCases tc     JOIN FactWorkItemLinkHistory flh         ON flh.SourceWorkItemID = tc.TestCaseID         AND flh.RemovedDate = CONVERT(DATETIME, '9999', 126)         AND flh.TeamProjectCollectionSK = @TeamProjectCollectionSK     JOIN [CurrentWorkItemView] wi         ON wi.[System_Id] = flh.TargetWorkItemID         AND wi.[System_WorkItemType] = @Bug         AND wi.[ProjectNodeGUID] = @ProjectGuid         --  Customization 3 of 3: only include test status information when test case area path = root. Added the following statement         AND wi.AreaPath = '{the root area path of the team project}'     GROUP BY tc.DeliverableID … 5. Save the report and you’re all set. Note: you may need to re-apply custom parameter changes like pre-selected sprints.

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• Best practices in versioning

  - by Gerenuk

  I develop some scripts for data analysis in a small team. For the moment we use SVN, but not in a very structured way. We haven't even looked how to use branches even though we need this functionality. What do you suggest as the best practice to setup the following system: two code bases (core and plugins) versions can be incompatible to previous scripts sometimes individual features are being developed and not yet finished, while other fixes have to be done urgently to the code In the end we don't deliver the code as a package, but rather place the Python scripts in some directory (with version names?). Some other python script which serves as a configuration choses the desired version, sets the path to these libraries and then starts to import the modules. I saw stable releases to be named "trunk" so I did the same. However, no version numbers yet. Core and plugins are different repositories, however we have to match versions for compatibility. Can you suggest some best practices or reference to ease development and reduce chaos? :) Some suggested GIT. I haven't heard about it, but I'm free to change.

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• Parameterized StreamInsight Queries

  - by Roman Schindlauer

  The changes in our APIs enable a set of scenarios that were either not possible before or could only be achieved through workarounds. One such use case that people ask about frequently is the ability to parameterize a query and instantiate it with different values instead of re-deploying the entire statement. I’ll demonstrate how to do this in StreamInsight 2.1 and combine it with a method of using subjects for dynamic query composition in a mini-series of (at least) two blog articles. Let’s start with something really simple: I want to deploy a windowed aggregate to a StreamInsight server, and later use it with different window sizes. The LINQ statement for such an aggregate is very straightforward and familiar: var result = from win in stream.TumblingWindow(TimeSpan.FromSeconds(5))               select win.Avg(e => e.Value); Obviously, we had to use an existing input stream object as well as a concrete TimeSpan value. If we want to be able to re-use this construct, we can define it as a IQStreamable: var avg = myApp     .DefineStreamable((IQStreamable<SourcePayload> s, TimeSpan w) =>         from win in s.TumblingWindow(w)         select win.Avg(e => e.Value)); The DefineStreamable API lets us define a function, in our case from a IQStreamable (the input stream) and a TimeSpan (the window length) to an IQStreamable (the result). We can then use it like a function, with the input stream and the window length as parameters: var result = avg(stream, TimeSpan.FromSeconds(5)); Nice, but you might ask: what does this save me, except from writing my own extension method? Well, in addition to defining the IQStreamable function, you can actually deploy it to the server, to make it re-usable by another process! When we deploy an artifact in V2.1, we give it a name: var avg = myApp     .DefineStreamable((IQStreamable<SourcePayload> s, TimeSpan w) =>         from win in s.TumblingWindow(w)         select win.Avg(e => e.Value))     .Deploy("AverageQuery"); When connected to the same server, we can now use that name to retrieve the IQStreamable and use it with our own parameters: var averageQuery = myApp     .GetStreamable<IQStreamable<SourcePayload>, TimeSpan, double>("AverageQuery"); var result = averageQuery(stream, TimeSpan.FromSeconds(5)); Convenient, isn’t it? Keep in mind that, even though the function “AverageQuery” is deployed to the server, its logic will still be instantiated into each process when the process is created. The advantage here is being able to deploy that function, so another client who wants to use it doesn’t need to ask the author for the code or assembly, but just needs to know the name of deployed entity. A few words on the function signature of GetStreamable: the last type parameter (here: double) is the payload type of the result, not the actual result stream’s type itself. The returned object is a function from IQStreamable<SourcePayload> and TimeSpan to IQStreamable<double>. In the next article we will integrate this usage of IQStreamables with Subjects in StreamInsight, so stay tuned! Regards, The StreamInsight Team

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• Adding root bone in 3DS Max?

  - by carlturtle

  my animation artist has made me a nice first person pair of arms, animated it, textured it, and given it to me. Then he went on vacation. I am programming my animations, and I am trying to test the model he has given me. Building my project gives me a warning: Multiple skeletons were found in the file. The first skeleton, named "frame l upperarm" has been moved to be a child of the scene root. The other, "frame r upperarm", will be ignored. Fragment identifier "frame r upperarm". Then an error: "Vertex is bound to bone "frame l forearm", but this bone is not present in the skeleton." I realize this means that there are two skeletons, as said in this problem: Importing 3d model with multiple skeletons I have 3DS Max, but I have no idea how to use it, and Google/CGTalk/Plycount turn up nothing relevant on how to add a root bone or combine skeletons. If anyone knows how, it would help me out greatly. Thanks.

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• Strategies for managing use of types in Python

  - by dave

  I'm a long time programmer in C# but have been coding in Python for the past year. One of the big hurdles for me was the lack of type definitions for variables and parameters. Whereas I totally get the idea of duck typing, I do find it frustrating that I can't tell the type of a variable just by looking at it. This is an issue when you look at someone else's code where they've used ambiguous names for method parameters (see edit below). In a few cases, I've added asserts to ensure parameters comply with an expected type but this goes against the whole duck typing thing. On some methods, I'll document the expected type of parameters (eg: list of user objects), but even this seems to go against the idea of just using an object and let the runtime deal with exceptions. What strategies do you use to avoid typing problems in Python? Edit: Example of the parameter naming issues: If our code base we have a task object (ORM object) and a task_obj object (higher level object that embeds a task). Needless to say, many methods accept a parameter named 'task'. The method might expect a task or a task_obj or some other construct such as a dictionary of task properties - it is not clear. It is them up to be to look at how that parameter is used in order to work out what the method expects.

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• Parse text file on click - and then display

  - by John R

  I am thinking of a methodology for rapid retrieval of code snippets. I imagine an HTML table with a setup like this: one two ... ten one oneTwo() oneTen() two twoOne() twoTen() ... ten tenOne() tenTwo() When a user clicks a function in this HTML table, a snippet of code is shown in another div tag or perhaps a popup window (I'm open to different solutions). I want to maintain only one PHP file named utitlities.php that contains a class called 'util'. This file & class will hold all the functions referenced in the above table (it is also used on various projects and is functional code). A key idea is that I do not want to update the HTML documentation everytime I write/update a new function in utilities.php. I should be able to click a function in the table and have PHP open the utilities file, parse out the apropriate function and display it in an HTML window. Questions: 1) I will be coding this in PHP and JavaScript but am wondering if similar scripts are available (for all or part) so I don't reinvent the wheel. 2) Quick & easy Ajax suggestions appreciated too (probably will use jquery, but am rusty). 3) Methodology for parsing out the functions from the utilities.php file (I'm not to good with regex).

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• A fix for the design time error in MVVM Light V4.1

  - by Laurent Bugnion

  For those of you who installed V4.1 of MVVM Light and created a project for Windows Phone 8, you will have noticed an error showing up in the design surface (either in Visual Studio designer, or in Expression Blend). The error says: “Could not load type ‘System.ComponentModel.INotifyPropertyChanging’ from assembly ‘mscorlib.extensions’” with additional information about version numbers. The error is caused by an incompatibility between versions of System.Windows.Interactivity. Because this assembly is strongly named, any version incompatibility is causing the kind of error shown here (for an interesting discussion on the strong naming issue, see this thread on Codeplex). I managed to resolve the issue for Windows Phone 8 and will publish a cleaned up installer next week. In the mean time, in order to allow you to continue development, please follow the steps: Download the new DLLs zip package (MVVMLight_V4_1_25_WP8). Right click on the Zip file and select Properties from the context menu. Press the “Unblock” button (if available) and then OK. Right click again on the zip package and select “Extract all…”. Select a known location for the new DLLs. Open the MVVM Light project with the design time error in Visual Studio 2012. Open the References folder in the Solution Explorer. Select the following DLLs: GalaSoft.MvvmLight.dll, GalaSoft.MvvmLight.Extras.dll, Microsoft.Practices.ServiceLocation.dll and System.Windows.Interactivity.dll. Press “delete” and confirm to remove the DLLs from your project. Right click on References and select Add Reference from the context menu. Browse to the folder with the new DLLs. Select the four new DLLs and press OK. Rebuild your application, and open it again in Blend or in the Visual Studio designer. The error should be gone now. In the next few days, as time allows, I will publish a new MSI containing a fixed version of the DLLs as well as a few other improvements. This quick fix should however allow you to continue working on your Windows Phone 8 projects in design mode too.   Laurent Bugnion (GalaSoft) Subscribe | Twitter | Facebook | Flickr | LinkedIn

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• Horse Drawn Fiber Optics Bring Broadband to Remote Areas

  - by Jason Fitzpatrick

  When you think of fiber optics and high speed internet the last thing you likely think of is… horses. Yet horses have been put to use rolling out fiber optics to remote rural locations. In Vermont a Belgium draft horse named Fred, seen in the photo above being tended by his handler Claude, is a distinctly 19th century solution to a 21st century problem; how to run fiber optic cable through remote areas where trucks cannot easily pass. The man and animal are indispensable to cable and phone-service provider FairPoint Communications because they easily can access hard-to-reach job sites along country roads, which bulky utility trucks often cannot. “It just saves so much work – it would take probably 15 guys to do what Fred and Claude can do,” said Paul Clancy, foreman of a line crew from FairPoint. “They can pull 5,000 feet of cable with no sweat.” You can read more about the use of draft horses to draw lines and the roll out of broadband to rural Vermont at the link below. Vermont Uses Draft Horse to Lay Cables for Internet Access [Reuters] How To Encrypt Your Cloud-Based Drive with BoxcryptorHTG Explains: Photography with Film-Based CamerasHow to Clean Your Dirty Smartphone (Without Breaking Something)

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• IRC News from #netbeans on FreeNode

  - by Geertjan

  I joined the #netbeans channel on FreeNode last week and the discussions there are really great. It's so cool to not have the endless back and forth of an e-mail exchange. Instead, you can hammer out a complete solution to a problem while chatting live in the channel. A case in point was yesterday, when someone named 'charmeleon' wanted to create a NetBeans Platform based application that includes the "image" module from the NetBeans IDE sources. That way, he'd have a starting point for his own image-oriented application, since he'd not only have the NetBeans Platform, but also the sources of the "image" module. Had we been communicating via e-mail, it would have taken weeks, at least, to come to a solution. Instead, we hashed it out together live, including some very specific problems that would have been hard to communicate about via e-mail. In the end, I made a movie showing exactly the scenario that charmeleon was interested in: And, right now, in the #netbeans channel, charmeleon said: "NetBeans RCP feels like cheating once you start getting over the hump." I'm sure the fact that the hump was handled within a few hours of chatting on irc is a big contributor to that impression.

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• A Big Congrats to Hitachi- Now a Diamond Level Partner!

  - by Kristin Rose

  Normal 0 false false false EN-US X-NONE X-NONE MicrosoftInternetExplorer4 /* 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:0in; mso-para-margin-bottom:.0001pt; 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; mso-bidi-font-family:"Times New Roman"; mso-bidi-theme-font:minor-bidi;} We’ve said this before and we’ll say it again, nothing sparkles quite like a diamond. Being named Diamond level partner is the highest ranking available in the Oracle PartnerNetwork Specialized program, and we could not be more excited to congratulate Hitachi, Ltd on their new glistening title! Hitachi has helped clients maximize the business benefits of their Oracle Applications for more than two decades, while also helping them bring their business visions to life through industry led services and solutions. Not only has Hitachi achieved Diamond level status, they also have 29 additional Oracle Specializations! Here at OPN we know that it all starts with equipping our partners with the proper tools to help their end customers succeed, and we truly believe that diamonds partners are forever! So here’s to you Hitachi, our diamond in the ruff! Shine On, The OPN Communications Team

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• Changing the Default Windows Phone 7 Deployment Target In Visual Studio 2010

  - by mbcrump

  After you download and install the January 2011 Windows Phone update, you will notice one annoying thing. The default deployment target for Windows Phone Projects in Visual Studio changes to Windows Phone 7 Device. Before the update, it defaulted to the Emulator. I found this extremely annoying as I’m more than likely going to test with the emulator before putting it on my actual device. Now to make things fair, Microsoft told you they were going to switch the default and even provided a solution, but you will have to check a tiny paragraph in the release notes. The good news is that its very easy to do: Simply navigate out to : %LocalAppData%\Microsoft\Phone Tools\CoreCon See the folder named, “10.0”? Go ahead and delete it. Now, the folder will be completely empty and if you fire up Visual Studio 2010 you will see we are now defaulting to the Emulator again. In my opinion, this should have been left at Emulator. Now, new WP7 developers will get a build error when they first start a WP7 project and will not know why until they read the error list.  Subscribe to my feed CodeProject

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• Entity framework separating entities for product and customer specific implementation

  - by Codecat

  I am designing an application with intention into making it a product line. I would like to extend the functionality across all layers and first struggle is with domain models. For example, core functionality would have entity named Invoice with few standard fields and then customer requirements will add some new fields to it, but I don't want to add to core Invoice class. For every customer I could use customer specific DbContext and injected correct context with dependency injection. Also every customer will get they own deployment public class Product.Domain.Invoice { public int InvoiceId { get; set; } // Other fields } How to approach this problem? Solution 1 does not work since Entity Framework does not allow same simple name classes. public class CustomerA.Domain.Invoice : Product.Domain.Invoice { public User ReviewedBy { get; set; } public DateTime? ReviewedOn { get; set; } } Solution 2 Create separate table and link it to core domain table. Reusing services and controllers could be harder. public class CustomerA.Domain.CustomerAInvoice { public Product.Domain.Invoice Invoice { get; set; } public User ReviewedBy { get; set; } public DateTime? ReviewedOn { get; set; } }

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• How to handle multi-processing of libraries which already spawn sub-processes?

  - by exhuma

  I am having some trouble coming up with a good solution to limit sub-processes in a script which uses a multi-processed library and the script itself is also multi-processed. Both, the library and script are modifiable by us. I believe the question is more about design than actual code, but for what it's worth, it's written in Python. The goal of the library is to hide implementation details of various internet routers. For that reason, the library has a "Proxy" factory method which takes the IP of a router as parameter. The factory then probes the device using a set of possible proxies. Usually, there is one proxy which immediately knows that is is able to send commands to this device. All others usually take some time to return (given a timeout). One thought was already to simply query the device for an identifier, and then select the proper proxy using that, but in order to do so, you would already need to know how to query the device. Abstracting this knowledge is one of the main purposes of the library, so that becomes a little bit of a "circular-requirement"/deadlock: To connect to a device, you need to know what proxy to use, and to know what proxy to create, you need to connect to a device. So probing the device is - as we can see - the best solution so far, apart from keeping a lookup-table somewhere. The library currently kills all remaining processes once a valid proxy has been found. And yes, there is always only one good proxy per device. Currently there are about 12 proxies. So if one create a proxy instance using the factory, 12 sub-processes are spawned. So far, this has been really useful and worked very well. But recently someone else wanted to use this library to "broadcast" a command to all devices. So he took the library, and wrote his own multi-processed script. This obviously spawned 12 * n processes where n is the number of IPs to which he broadcasted. This has given us two problems: The host on which the command was executed slowed down to a near halt. Aborting the script with CTRL+C ground the system to a total halt. Not even the hardware console responded anymore! This may be due to some Python strangeness which still needs to be investigated. Maybe related to http://bugs.python.org/issue8296 The big underlying question, is how to design a library which does multi-processing, so other applications which use this library and want to be multi-processed themselves do not run into system limitations. My first thought was to require a pool to be passed to the library, and execute all tasks in that pool. In that way, the person using the library has control over the usage of system resources. But my gut tells me that there must be a better solution. Disclaimer: My experience with multiprocessing is fairly limited. I have implemented a few straightforward which did not require access control to resources. So I have not yet any practical experience with semaphores or mutexes. p.s.: In the future, we may have enough information to do this without the probing. But the database which would contain the proper information is not yet operational. Also, the design about multiprocessing a multiprocessed library intrigues me :)

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• Class design issue

  - by user2865206

  I'm new to OOP and a lot of times I become stumped in situations similar to this example: Task: Generate an XML document that contains information about a person. Assume the information is readily available in a database. Here is an example of the structure: <Person> <Name>John Doe</Name> <Age>21</Age> <Address> <Street>100 Main St.</Street> <City>Sylvania</City> <State>OH</State> </Address> <Relatives> <Parents> <Mother> <Name>Jane Doe</Name> </Mother> <Father> <Name>John Doe Sr.</Name> </Father> </Parents> <Siblings> <Brother> <Name>Jeff Doe</Name> </Brother> <Brother> <Name>Steven Doe</Name> </Brother> </Siblings> </Relatives> </Person> Ok lets create a class for each tag (ie: Person, Name, Age, Address) Lets assume each class is only responsible for itself and the elements directly contained Each class will know (have defined by default) the classes that are directly contained within them Each class will have a process() function that will add itself and its childeren to the XML document we are creating When a child is drawn, as in the previous line, we will have them call process() as well Now we are in a recursive loop where each object draws their childeren until all are drawn But what if only some of the tags need to be drawn, and the rest are optional? Some are optional based on if the data exists (if we have it, we must draw it), and some are optional based on the preferences of the user generating the document How do we make sure each object has the data it needs to draw itself and it's childeren? We can pass down a massive array through every object, but that seems shitty doesnt it? We could have each object query the database for it, but thats a lot of queries, and how does it know what it's query is? What if we want to get rid of a tag later? There is no way to reference them. I've been thinking about this for 20 hours now. I feel like I am misunderstanding a design principle or am just approaching this all wrong. How would you go about programming something like this? I suppose this problem could apply to any senario where there are classes that create other classes, but the classes created need information to run. How do I get the information to them in a way that doesn't seem fucky? Thanks for all of your time, this has been kicking my ass.

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• Ubuntu 12.04 won't shut down - stopping winbind daemon

  - by jan

  My Precise Pangolin sometimes won't shut down - the screen is black with text on it. Mostly last line says something like "stopping winbind deamon" (sometimes also virtualbox, which is above winbind daemon; edit: sometimes the last line says "running unattended updates") and it stays like this for about ten miutes. Then I usually hold the power button for 5s to shut it down. It's very unpredictable - sometimes the computer shuts down without problem and sometimes it hangs. I've tried many ways to shut it down: HW button, panel applet, sudo shutdown -h now, sudo poweroff, sudo halt, etc. even sudo reboot or restart from panel applet have this problem. Sometimes it works ok but every method named hung at least once on the same (damned) line. My specs: FUJITSU SIEMENS LIFEBOOK E8310, Intel Core2 Duo T7300 @ 2.00GHz, 3GB RAM, GPU: Mobile Intel(R) 965 Express Chipset Family Ubuntu 12.04.2 32bit, 3.5.0-41-generic kernel (but it did it on older kernels and 12.04.x systems too). Any ideas what should I try next? Thanks a lot! Jan

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• Dual boot Ubuntu 12.10 and Linux Mint 13

  - by user101693

  I know this question has been asked so many times, but I don't know what should I do in my case with those tutorials available everywhere. This is how my current situation looks like: Right now I'm using Linux Mint 13 Xfce installed with: 500MB of /boot 2GB of swap 15GB of / The rest of my space is /home with no space left in my hard drive And I just got a Ubuntu 12.10 live CD from my friend, and I intended to install it alongside my Linux Mint. And I want to select something else in the installation process. The question is: I want to use the same /home partition for Ubuntu and Linux Mint with same user but different directory because I don't want my configuration files conflict with each other. For example my username is Budiman and I want a directory named /home/budiman-Ubuntu for Ubuntu and /home/budiman-LinuxMint for Linux Mint. How can I do that? I read it somewhere said that I can share /boot and swap with multiple Distro, is it true? How can I make another /root directory for Ubuntu since I don't have any space left in my hard drive? Can I resize the /home partition without losing my data? How can I do that if it's possible? Now I've used 10-20% of my /home partition. I really hope somebody can help me with my question, if possible with a full tutorial starting from install with something else step until completion of the process. Thanks before :)

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• Worthless Anti-Spam (What can we learn)

  - by smehaffie

  I recently can across a site that had a “anti-spam” field at the bottom of the entry from.  The first issue I had with it was that at 1280X800 you could not read the value you were suppose to enter (see below).  You tell me, should you enter div, dlv, piv, or plv. But even worse than not being readable at high resolutions is the fact that the programmer who coded it really did not understand what this was used for.  An anti-spam (aka: catpcha) entry field should not be able to be read by looking at the HTML DOM object (so entry of value cannot be scripted).  In this case the value is simply a disabled text input filed that has the value you need to type.  So a hacker would simply need to search for text input field named “spam2” and then they could flood the site with spam. 1: <td> 2: <label> 3: <input name="spam1" type="text" class="small" id="spam1" size="6" maxlength="3" /> 4: <input name="spam2" type="text" class="small" id="spam2" value="plv" 5: disabled="disabled" size="6" maxlength="3" /> 6: * <span class="small">- Anti-SPAM key - please enter matching value</span> 7: </label> 8: </td>   There are some things to learn from this example: 1) Always make sure you understand why you are coding a feature/function for any program you write.  Just following the requirements without realizing the “why” will sooner or later come back to bite you.  I think the above example appears to be an example of this. 2) Always check how the screen appears in different resolutions.  In this case it was pretty much unreadable in 1280x800, but you could read it in 800X600 (but most people I know do not have their resolution set that low).  Lucky for me I could “View Source” and get the value I needed to enter.

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• Matrices: Arrays or separate member variables?

  - by bjz

  I'm teaching myself 3D maths and in the process building my own rudimentary engine (of sorts). I was wondering what would be the best way to structure my matrix class. There are a few options: Separate member variables: struct Mat4 { float m11, m12, m13, m14, m21, m22, m23, m24, m31, m32, m33, m34, m41, m42, m43, m44; // methods } A multi-dimensional array: struct Mat4 { float[4][4] m; // methods } An array of vectors struct Mat4 { Vec4[4] m; // methods } I'm guessing there would be positives and negatives to each. From 3D Math Primer for Graphics and Game Development, 2nd Edition p.155: Matrices use 1-based indices, so the first row and column are numbered 1. For example, a12 (read “a one two,” not “a twelve”) is the element in the first row, second column. Notice that this is different from programming languages such as C++ and Java, which use 0-based array indices. A matrix does not have a column 0 or row 0. This difference in indexing can cause some confusion if matrices are stored using an actual array data type. For this reason, it’s common for classes that store small, fixed size matrices of the type used for geometric purposes to give each element its own named member variable, such as float a11, instead of using the language’s native array support with something like float elem[3][3]. So that's one vote for method one. Is this really the accepted way to do things? It seems rather unwieldy if the only benefit would be sticking with the conventional math notation.

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• SharePoint: UI for ordering list items

  - by svdoever

  SharePoint list items have in the the base Item template a field named Order. This field is not shown by default. SharePoint 2007, 2010 and 2013 have a possibility to specify the order in a UI, using the _layouts page: {SiteUrl}/_layouts/Reorder.aspx?List={ListId} In SharePoint 2010 and 2013 it is possible to add a custom action to a list. It is possible to add a custom action to order list items as follows (SharePoint 2010 description): Open SharePoint Designer 2010 Navigate to a list Select Custom Actions > List Item Menu Fill in the dialog box: Open List Settings > Advanced Settings > Content Types, and set Allow management of content types to No  On List Settings select Column Ordering This results in the following UI in the browser: Selecting the custom Order Items action (under List Tools > Items) results in: You can change your custom action in SharePoint designer. On the list screen in the bottom right corner you can find the custom action: We now need to modify the view to include the order by adding the Order field to the view, and sorting on the Order field. Problem is that the Order field is hidden. It is possible to modify the schema of the Order field to set the Hidden attribute to FALSE. If we don’t want to write code to do it and still get the required result it is also possible to modify the view through SharePoint Designer: Modify the code of the view: This results in: Note that if you change the view through the web UI these changes are partly lost. If this is a problem modify the Order field schema for the list.

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• Google penalty recovery

  - by sajeev

  I have a site, which is a spiritual site and has nothing to do with commercial or business thing. It was in the first page with the keyword RADHANATH SWAMI. Then suddenly, in sep'13, the site went out from google search. When I checked my WebmasterTools, I saw that there were 40,000 backlinks from a site named http://freeguestbooks.net. But manual action section in WebmasterToolssaid "No Manual webspam actions found" and till date, it shows the same. Then I contacted the webmaster of freeguestbooks.net and requested him to remove the 40K odd backlinks and he very kindly removed it. The WebmasterTools now shows 21,777 backlinks from this site. But since 2 months, the decrease rate of these backlinks is very slow, almost zero. Again, I had contacted the webmaster of freeguestbooks.net and he confirmed that there are no backlinks pointing to his site. I am also told that my anchor text is over-optimised... Total backlinks to my site as per WebmasterTools is only 24,937 out of which 21,777 are the links from freeguestbooks.net as shown in WebmasterTools. Could an expert suggest a way out to get back into google.... Sajeev, India

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• Integrating Amazon EC2 in Java via NetBeans IDE

  - by Geertjan

  Next, having looked at Amazon Associates services and Amazon S3, let's take a look at Amazon EC2, the elastic compute cloud which provides remote computing services. I started by launching an instance of Ubuntu Server 14.04 on Amazon EC2, which looks a bit like this in the on-line AWS Management Console, though I whitened out most of the details: Now that I have at least one running instance available on Amazon EC2, it makes sense to use the services that are integrated into NetBeans IDE:  I created a new application with one class, named "AmazonEC2Demo". Then I dragged the "describeInstances" service that you see above, with the mouse, into the class. Then the IDE automatically created all the other files you see below, i.e., 4 Java classes and one properties file: In the properties file, register the access ID and secret keys. These are read by the other generated Java classes. Signing and authentication are done automatically by the code that is generated, i.e., there's nothing generic you need to do and you can immediately begin working on your domain-specific code. Finally, you're now able to rewrite the code in "AmazonEC2Demo" to connect to Amazon EC2 and obtain information about your running instance: public class AmazonEC2Demo { public static void main(String[] args) { String instanceId1 = "i-something"; RestResponse result; try { result = AmazonEC2Service.describeInstances(instanceId1); System.out.println(result.getDataAsString()); } catch (IOException ex) { Logger.getLogger(AmazonEC2Demo.class.getName()).log(Level.SEVERE, null, ex); } } } From the above, you'll receive a chunk of XML with data about the running instance, it's name, status, dates, etc. In other words, you're now ready to integrate Amazon EC2 features directly into the applications you're writing, without very much work to get started. Within about 5 minutes, you're working on your business logic, rather than on the generic code that anyone needs when integrating with Amazon EC2.

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• Awesome and LXDE desktop managers messed up KDE

  - by Caleb1994

  I saw a desktop manager named "Awesome" earlier on Google+, and thought I'd give it a try. In short, I didn't like it, but it got me wondering what other desktops were like, which I hadn't tried. The first one to come to mind was LXDE. I installed that, and tried it. I wasn't a big fan, so I just went to log back into KDE. Only, when I log in, everything is screwy. My theme is weird (although, according to system settings, it is still the same). All the categories and application short cuts in the KMenu are gone, except my favorites, which are now renamed with the "short name", it seems. I know these things are global resources, so it is very likely that one of these Window Managers screwed it up, but I need it fixed. Actually, it seems that after restarting the theme problem fixed itself, but the KMenu items disappearing is still a problem. Does anyone know where these items are stored? (I know they are are just .desktop files somewhere, IIRC, but I don't remember where they are usually stored so I can see if they are still there). I'm hoping it's just a matter of a broken link or something somewhere, not deleted shortcuts... :/ In summary: Any ideas on what caused this? Do you know how to fix the KMenu, or at least where the .desktop shortcuts are stored for the KMenu so I can see if they still exist (crosses fingers).

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