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• Removing existing filtered pages from Google's index: noindex / 301 / canonical to non-filtered page?

  - by Noam

  I've decided to remove some of my site's pages from the Google index to focus more of the indexed pages on higher quality pages. The pages I'm going to remove are already in the index. These removed pages are filtered pages which will continue to exist, I just don't want them in the google index because they add little quality to the same page without any filter selected. I've added in webmaster tools specification of narrow for the parameters that set these filters, but it doesn't seem this changes anything in how he handles these pages. So I'm considering three options: Adding <meta name="robots" content="noindex" /> to the html header of these filtered pages 301 to the non-filtered page that contains the most similar information and will remain in the index Canonical tag. Which I'm not sure is exactly the mainstream use case, as these aren't really the same pages. Which should I use?

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• How is time calculation performed by a computer?

  - by Jorge Mendoza

  I need to add a certain feature to a module in a given project regarding time calculation. For this specific case I'm using Java and reading through the documentation of the Date class I found out the time is calculated in milliseconds starting from January 1, 1970, 00:00:00 GMT. I think it's safe to assume there is a similar "starting date" in other languages so I guess the specific implementation in Java doesn't matter. How is the time calculation performed by the computer? How does it know exactly how many milliseconds have passed from that given "starting date and time" to the current date and time?

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• 2D pathfinding - finding smooth paths

  - by Kooi Nam Ng

  I was trying to implement a simple pathfinding, but the outcome is less satisfactory than what I intended to achieve. The thing is units in games like Starcraft 2 move in all directions whereas units in my case only move in at most 8 directions (Warcraft 1 style) as these 8 directions direct to next available nodes (they move from a tile to next neighboring tile). What should I do in order to achieve the result as in Starcraft 2? Shrink the tile size? On the picture you can see a horizontal line of rock tiles being obstacles, and the found path marked as green tiles. The red line is the path I want to achieve.

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• Filtering content from response body HTML (mod_security or other WAFs)

  - by Bingo Star

  We have Apache on Linux with mod_security as the Web App Firewall (WAF) layer. To prevent content injections, we have some rules that basically disable a page containing some text patterns from showing up at all. For example, if an HTML page on webserver has slur words (because some webmaster may have copied/pasted text without proofreading) the Apache server throws a 406 error. Our requirement now is a little different: we would like to show the page as regular 200, but if such a pattern is matched, we want to strip out the offending content. Not block the entire page. If we had a server side technology we could easily code for this, but sadly this is for a website with 1000s of static html pages. Another solution might have been to do a cronjob of find/replace strings and run them on folders en-masse, maybe, but we don't have access to the file system in this case (different department). We do have control over WAF or Apache rules if any. Any pointers or creative ideas?

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• Books or help on OO Analysis

  - by Pat

  I have this course where we learn about the domain model, use cases, contracts and eventually leap into class diagrams and sequence diagrams to define good software classes. I just had an exam and I got trashed, but part of the reason is we barely have any practical material, I spent at least two good months without drawing a single class diagram by myself from a case study. I'm not here to blame the system or the class I'm in, I'm just wondering if people have some exercise-style books that either provide domain models with glossaries, system sequence diagrams and ask you to use GRASP to make software classes? I could really use some alone-time practicing going from analysis to conception of software entities. I'm almost done with Larman's book called "Applying UML and Patterns An Introduction to Object-Oriented Analysis and Design and Iterative Development, Third Edition". It's a good book, but I'm not doing anything by myself since it doesn't come with exercises. Thanks.

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• Conways Game of Life C#

  - by Darren Young

  Hi, Not sure if this is the correct place for this question or SO - mods please move if necessary. I am going to have a go at creating GoL over the weekend as a little test project : http://en.wikipedia.org/wiki/Conway's_Game_of_Life I understand the algorithm, however I just wanted to check regarding the implementation, from maybe somebody that has tried it. Essentially, my first (basic) implementation, will be a static grid at a set speed. If I understand correctly, these are the steps I will need: Initial seed Create 2d array with initial set up Foreach iteration, create temporary array, calculating each cells new state based on the Game of Life algorithm Assign temp array to proper array. Redraw grid from proper array. My concerns are over speed. When I am populating the grid from the array, would it simply be a case of looping through the array, assigning on or off to each grid cell and then redraw the grid? Am I on the correct path?

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• Best practices for periodically saving game state to disk

  - by Ben Morris

  I'm working on an MMO. All of the player and environment data lives on a server and is kept in memory. There's a "world" object which keeps track of all of the maps, characters, etc. and their relations to each other. To avoid data loss in case of a crash, I've been periodically serializing the world to disk. The trouble is, this object can be quite large, so when the server starts writing, there's noticeable in-game slowdown for a few seconds, which I'd like to avoid. Any pointers on how to go about this in a more efficient way?

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• Make my website dynamically loaded data available to Facebook Open Graph Object Scrapper

  - by fvaliquette

  Here is the design of my web site: The user enter myWebsite.com/a/1 .htaccess rules redirect to myWebsite.com/b Now the JavaScript ExtJS library is loading. Extracting the value from the URL (in this case it is “1”) Loading ./xml/1.xml From 1.xml setting the Open Graph data (Title, type, image, etc) Loading data that will be shown to the user from 1.xml into the website. My question is: How can I make the Open Graph data available to Facebook? Facebook do not to load my ExtJS JavaScript Library before extracting the Open Graph Object values from the HTML. Is there an easy solution to this problem? The only solutions I found is to make statics web pages or dynamically pages rendered on the server side but I would like to avoid these since my web page implementation is already finished and I would like to avoid re working on it.

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• Looking software for making an animated cartoon to present a new application/scenario idea

  - by Skarab

  I have an idea for an application (+usage scenario) and I would like to create an animated cartoon that shows a use case for this application and its novelty. My company is a rather big so I am looking for an interesting way to get people know my idea to get feedback/get a green light to further develop it. Therefore I am looking for an application (free or commercial) that I could use to realize such an animated cartoon. I have posted this quesion before on stackoverflow, but I think this might be a better community to ask such a question.

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• how to ask questions about bad practices in stackoverflow ( or other technical forums) [migrated]

  - by Nahum Litvin

  I had a case when I needed to do something in code that I knew is a bad practice. but because of a unique situation and after considering the risks thoroughly decided that is worth it. I cannot start explaining all my considerations that include buisness secrets over the internet but I do need technical assistance. when I tried to ask at SA I got heated responses why it is a bad practice instead of answeres to how to do this. poeple are so conserned about what is the right way to write code that they forget that there are other considerations as well. can anyone provide insight of how to correctly ask such a question in order to avoid "this is a bad practice" answers and get real answers?

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• Calculating instantaneous speed and acceleration for a simple Car software model

  - by Dylan

  I am trying to model a speedometer and tachometer for a simple software model of a car dashboard. I want this to be relatively simple, so for my purposes I won't likely simulate variables such as drag (or, assume that drag is a constant). But I would like to know the general formulas for: 1) Calculating the RPM, depending on a position of a graphical slider representing the accelerator. 2) Using this information to find the instantaneous speed (or, magnitude of instantaneous velocity?). I am not sure, in the case of 2), what other independent variables I need to consider. Do I need to consider the frequency of rotation of the wheels (assuming a fixed radius), in addition to the RPM? If anyone can give me a rough explanation plus relevant formulas, or alternatively direct me to other trusted resources online (I have had a hard time sifting through info and determining the accuracy), it would be much appreciated.

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• C++ simple arrays and pointers question

  - by nashmaniac

  So here's the confusion, let's say I declare an array of characters char name[3] = "Sam"; and then I declare another array but this time using pointers char * name = "Sam"; What's the difference between the two? I mean they work the same way in a program. Also how does the latter store the size of the stuff that someone puts in it, in this case 3 characters? Also how is it different from char * name = new char[3]; If those three are different where should they be used I mean in what circumstances?

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• Parallel Installation of Ubuntu, Wubi and Windows 7?

  - by Aufwind

  I have Windows 7 installed on a Notebook. Because I wanted to experiment with Ubutnu without loosing my Windows 7 configuration I installed the Wubi Version of Ubuntu inside of Windows 7. Since things seam to work out well with Ubuntu and my harddisk space is very limited, I want to make Ubuntu my only operating system on this machine. So my question is: Is it possible, to install Ubuntu 11.04 additionally to my actual configuration (Wubi and Windows 7)? And if things turned out well with the native installation of Ubuntu, too, to delete Wubi and Windows 7 from my system afterwards? Why I am asking this is simply, that I am afraid, that if I just format my machine and made the whole harddisk available for the fresh Ubuntu installation, it could be possible, that it turns out, that one thing or an other would not work properly, like it did in Wubi. (Possible Network, VPN, and Firewall@work issues) In this case I'd like the possibility to switch back.

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• draw fog of war using shaders

  - by lezebulon

  I am making a RTS game, and I'd like some advice on how to best render fog of wars, given what I'm already doing. You can imagine this game as being a classic RTS like Age of Empires 2, where the fog of war will basically be handled by a 2D array telling if a given "tile" is explored or not. The specific things to consider here are : 1) I'm only doing a few draw calls to draw the whole screen, using shaders, and I'm not drawing "tile by tile" in a 2D loop 2) The whole map is much bigger than the screen, and the screen can move every frame or so In that case, how could I draw the fog of war ? I have no issue maintaining on the CPU-side a 2D array giving the fog of war for each tile, but what would be the best way to actually display it dynamically ? thanks!

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• Is it possible to construct a cube with fewer than 24 vertices

  - by Telanor

  I have a cube-based world like Minecraft and I'm wondering if there's a way to construct a cube with fewer than 24 vertices so I can reduce memory usage. It doesn't seem possible to me for 2 reasons: the normals wouldn't come out right and per-face textures wouldn't work. Is this the case or am I wrong? Maybe there's some fancy new DX11 tech that can help? Edit: Just to clarify, I have 2 requirements: I need surface normals for each cube face in order to do proper lighting and I need a way to address a different indexes in a texture array for each cube face

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• Groups page is blank in SharePoint 2010 [migrated]

  - by Murali Ramakrishnan

  Sometimes it's very confusing how Sharepoint 2010 group creation works Here's a scenario we have been facing from a long time wrt groups in SharePoint 2010 We had requirement of creating a two custom groups followed by creating a custom site through programmatically, For the most case the scenario works as how it is excepted to work. but, out of 1/100 site creation process the groups creation fails, which means we were able to access the group and users associated with it through programmatically. but, when it comes to UI stand point if you try to access the specific group page from the site permissions page - SharePoint returns a BLANK WHITE Page... BLANK WHITE Page... nothing else... Ain't is this a Sharepoint 2010 issue. or anybody had this problem and fixed it. Kindly share your thoughts

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• What are the relative merits for implementing an Erlang-style "Continuation" pattern in C#

  - by JoeGeeky

  What are the relative merits (or demerits) for implementing an Erlang-style "Continuation" pattern in C#. I'm working on a project that has a large number of Lowest priority threads and I'm wondering if my approach may be all wrong. It would seem there is a reasonable upper limit to the number of long-running threads that any one Process 'should' spawn. With that said, I'm not sure what would signal the tipping-point for too many thread or when alternate patterns such as "Continuation" would be more suitable. In this case, many of the threads do a small amount of work and then sleep until woken to go again (Ex. Heartbeat, purge caches, etc...). This continues for the life of the Process.

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• Is it typical for a provider of a web services to also provide client libraries?

  - by HDave

  My company is building a corporate Java web-app and we are leaning towards using GWT-RPC as the client-server protocol for performance reasons. However, in the future, we will need to provide an API for other enterprise systems to access our data as well. For this, we were thinking of a SOAP based web service. In my experience it is common for commercial providers of enterprise web applications to provide client libraries (Java, .NET, C#, etc.). Is this generally the case? I ask because if so, then why bother using SOAP or REST or any standard web services protocol at all? Why not just create a client libraries that communicate via GWT-RPC?

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• How to ensure apache2 reads htaccess for custom expiry?

  - by tzot

  I have a site with Apache 2.2.22 . I have enabled the mod-expires and mod-headers modules seemingly correctly: $ apachectl -t -D DUMP_MODULES … expires_module (shared) headers_module (shared) … Settings include: ExpiresActive On ExpiresDefault "access plus 10 minutes" ExpiresByType application/xml "access plus 1 minute" Checking the headers of requests, I see that max-age is set correctly both for the generic case and for xml files (which are auto-generated, but mostly static). I would like to have different expiries for xml files in a directory (e.g. /data), so http://site/data/sample.xml expires 24 hours later. I enter the following in data/.htaccess: ExpiresByType application/xml "access plus 24 hours" Header set Cache-control "max-age=86400, public" but it seems that apache ignores this. How can I ensure apache2 uses the .htaccess directives? I can provide further information if requested.

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• Novos modelos de licenciamento para Web (Hosting, Cloud e SaaS) - Sessão para Parceiros - 15/Feb/11

  - by Claudia Costa

  RESERVE JÁ O SEU LUGAR!Com o aparecimento de novos modelos de 'deployment' de aplicações em Web - Hosting, On demand, Software-as-a-Service, Cloud Computing, etc - surgem também novas necessidades quanto às formas de licenciamento que permitam criar comerciais que suportem esses novos paradigmas. Neste encontro pretendemos actualizar os parceiros Oracle sobre os vários modelos de licenciamento disponíveis para estas novas forma de disponibilização das aplicações, dando-lhes a informação necessária e sugestões sobres as possíveis linhas de actuação que lhes permitam tirar partido destas novas oportunidades de negócio, e mostrar exemplos de como outros ISV já o estão a fazer. A quem se destina: Directores GeraisResponsáveis Comerciais Responsáveis de Marketing Equipas comerciais Responsáveis pela Gestão do Programa OPN e da relação com a Oracle Agenda What Oracle understands for ISV? Industry trends: Hosting, Cloud Computing e Software as a Service O que é que a Oracle entende por ISV? Revisão dos modelos de licenciamento tradicionais Full Use, Application Specific (ASFU) Novos modelos de licenciamento Hosting, Embedded (ESL), Embedded 'Royalty model', SaaS for ISV's, Proprietory Application Hosting, Modelos não standard Referências / Case Studies Discussão aberta Local e Horário9h30 - 12h30Oracle, Lagoas Park, Edifício 8, Porto SalvoInscrições: Enviar email para: [email protected] mais informações por favor contacte Claudia Costa pelo email ou telefone 21 423 50 27

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• Oracle at the Gartner BI Summit Next Week

  - by kimberly.billings

  We're heading back to Vegas next week - this time for the Gartner Business Intelligence Summit April 12 - 14, 2010 at the Mandalay Bay Resort. Be sure to attend our Customer Case Study session featuring Beckman Coulter, Tuesday, April 13th at 9:45, then swing by our booth to have all your questions answered by Oracle BI and data warehousing experts. We will also be scheduling Face-to-Face meetings with Oracle product executives, so if you would like to schedule a meeting, submit a request via the online agenda builder and Gartner will arrange a meeting with the appropriate Oracle contact. To view the agenda and to find out more about the Gartner BI Summit, visit: http://www.gartner.com/it/page.jsp?id=1118023

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• SAP Applications Run Better on Oracle Exadata

  - by jgelhaus

  To yield the results necessary to stay competitive, your business-critical applications must be able to access the most reliable and up-to-date information. That’s why a growing number of SAP application customers are turning to Oracle Exadata Database Machine for better performance, better productivity—and big savings. Watch our latest Webcast to find out why Oracle Exadata is the ideal platform for running your SAP applications. You’ll learn how you can: Increase the performance of SAP applications Enhance reliability with a centralized, scalable platform Ensure quick, safe, and easy deployments Watch it now. Highlights include customer case studies and practical deployment strategies. Watch our latest on-demand Webcast to find out why Oracle Exadata is the ideal platform for running your SAP applications. Learn how to increase the performance of SAP applications, enhance reliability with a centralized, scalable platform and ensure quick, safe and easy deployments.

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• Windows Store is open for business!

  - by pluginbaby

  In case you didn’t know, you don’t have to wait for the launch of Windows 8 on October 26 to start building and deploying your apps. Developers from 120 markets (including Canada) can publish Windows Store apps right now! How to start ? Anyone with an MSDN Subscription, Dreamspark account (students) or BizSpark account (startups) get a 1-year Windows Store membership for FREE!! If you don’t have such account, an annual membership is only CAD $49 and lasts a full year. Just go to the Windows Store Dashboard on the Windows Dev Center and sign up. The dev tools are free and the SDK is ready.

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• Should all foreign table references use foreign key constraints

  - by TecBrat

  Closely related to: Foreign key restrictions -> yes or no? I asked a question on SO and it led me to ask this here. If I'm faced with a choice of having a circular reference or just not enforcing the restraint, which is the better choice? In my particular case I have customers and addresses. I want an address to have a reference to a customer and I want each customer to have a default billing address id and a default shipping address id. I might query for all addresses that have a certain customer ID or I might query for the address with the ID that matches the default shipping or billing address ids. I'm not sure yet how the constraints (or lack of) will effect the system as my application and it's data age.

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• How to install Perl Switch.pm module required to build WebKit-GTK?

  - by Sameer Naik

  I noticed that the perl version (5.14) shipped with 12.10 does not include the Switch.pm module needed while building WebKiT-GTK. Looking around on the internet I found few suggestions indicating that I should install something call p5-switch from ports. I have looked around and was not able to get this done. I am not a perl guy and have no idea where i can get this package. Can someone please help me as to Where to download the package for ubuntu 12.10 In case it is not a .deb, How do i install it.

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