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• Migrating Ruby on Rails Website to New Server (Linux)

  - by GarytheWorm

  I have an existing website that is a Ruby on Rails project. I have another server i need to transfer the existing website too. The server i wish to transfer too was originally hosting the website so has the necessary gems/configuration are installed. I have tar the current releases shared dir from the old server and transfered them over to the new server. I have then unpack the tar in the apps directory to the new location which is a different URL path. My problem is now as you can see below that the path on the current - is pointing to the old url. ( i ran ls -la to see owenership) How can i change this current path to read with my new web address? current releases shared sitepack.tar root@server1:/var/www/clients/client1/NEWSITE.com/web/apps# ls -la current - /var/www/OLDSITE.com/web/apps/releases/20120130171636 root@server1:/var/www/clients/client1/NEWSITE.com/web/apps#

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• Are two database trips reasonable for a login system?

  - by Randolph Potter

  I am designing a login system for a project, and have an issue about it requiring two trips to the database when a user logs in. User types in username and password Database is polled and password hash is retrieved for comparative purposes (first trip) Code tests hash against entered password (and salt), and if verified, resets the session ID New session ID and username are sent back to the database to write a row to the login table, and generate a login ID for that session. EDIT: I am using a random salt. Does this design make sense? Am I missing something? Is my concern about two trips unfounded? Comments and suggestions are welcome.

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• How to copy files while keeping directory structure?

  - by Cubic

  This is for a java project, but the same concept can be applied more generally: Basically, I have a projects with all *.java files located in some sub directory of src. Now I want to grab all directories with the name test in that directory tree and move them into a new directory called tests, e.g.: src->com->a1 -> A.java -> B.java -> test -> test1.java -> test2.java to src->com->a1 -> A.java -> B.java tests->com->a1->test -> test1.java -> test2.java How would I best do that?

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• Bug once in a while,but high priority

  - by Shirish11

  I am working on a CNC (computer numerical control) project which cuts shapes into metal with help of laser. Now my problem is once in a while (1-2 times in 20 odd days) the cutting goes wrong or not according to what is set. But this causes loss so the client is not very happy about it. I tried to find out the the cause of it by Including log files Debugging Repeating the same environment. But it wont repeat. A pause and continue operation will again make it to run smoothly with the bug reappearing. How do I tackle this issue? Should I state it as a Hardware Problem?

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• Making next and previous button in html [on hold]

  - by Andy

  I am new to html and javascript. My problem is that I have a list of items. An example of the list of item is : request0 request1 request2 request3 request4 Now I need to make next and previous buttons to navigate through this list. For example; If I am currently at request1 and hit the next button request2 should shown. If I hit the previous button it should show resquest0. This is my very first project in html and javascript. I have no ideas how to implement it.

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• The provider did not return a ProviderManifestToken string Entity Framework

  - by PearlFactory

  Moved from Home to work and went to fire up my project and after long pause "The provider did not return a ProviderManifestToken string" or even More Abscure ProviderIncompatable Exception Now after 20 mins of chasing my tail re different ver of EntityFramework 4.1 vs 4.2...blahblahblah Look inside at the inner exception A network-related or instance-specific error occurred while establishing a connection to SQL Server. The server was not found or was not accessible DOH!!!! Or a clean translation is that it cant find SQL or is offline or not running. SO check the power is on/Service running or as in my case Edit web.config & change back to Work SQL box   Hope you dont have this pain as the default errors @ the moment suck balls in the EntityFramework 4.XX releases   Cheers

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• Business Case for investing time developing Stubs and BizUnit Tests

  - by charlie.mott

  I was recently in a position where I had to justify why effort should be spent developing Stubbed Integration Tests for BizTalk solutions. These tests are usually developed using the BizUnit framework. I assumed that most seasoned BizTalk developers would consider this best practice. Even though Microsoft suggest use of BizUnit on MSDN, I've not found a single site listing the justifications for investing time writing stubs and BizUnit tests. Stubs Stubs should be developed to isolate your development team from external dependencies. This is described by Michael Stephenson here. Failing to do this can result in the following problems: In contract-first scenarios, the external system interface will have been defined.  But the interface may not have been setup or even developed yet for the BizTalk developers to work with. By the time you open the target location to see the data BizTalk has sent, it may have been swept away. If you are relying on the UI of the target system to see the data BizTalk has sent, what do you do if it fails to arrive? It may take time for the data to be processed or it may be scheduled to be processed later. Learning how to use the source\target systems and investigations into where things go wrong in these systems will slow down the BizTalk development effort. By the time the data is visible in a UI it may have undergone further transformations. In larger development teams working together, do you all use the same source and target instances. How do you know which data was created by whose tests? How do you know which event log error message are whose?  Another developer may have “cleaned up” your data. It is harder to write BizUnit tests that clean up the data\logs after each test run. What if your B2B partners' source or target system cannot support the sort of testing you want to do. They may not even have a development or test instance that you can work with. Their single test instance may be used by the SIT\UAT teams. There may be licencing costs of setting up an instances of the external system. The stubs I like to use are generic stubs that can accept\return any message type.  Usually I need to create one per protocol. They should be driven by BizUnit steps to: validates the data received; and select a response messages (or error response). Once built, they can be re-used for many integration tests and from project to project. I’m not saying that developers should never test against a real instance.  Every so often, you still need to connect to real developer or test instances of the source and target endpoints\services. The interface developers may ask you to send them some data to see if everything still works.  Or you might want some messages sent to BizTalk to get confidence that everything still works beyond BizTalk. Tests Automated “Stubbed Integration Tests” are usually built using the BizUnit framework. These facilitate testing of the entire integration process from source stub to target stub. It will ensure that all of the BizTalk components are configured together correctly to meet all the requirements. More fine grained unit testing of individual BizTalk components is still encouraged.  But BizUnit provides much the easiest way to test some components types (e.g. Orchestrations). Using BizUnit with the Behaviour Driven Development approach described by Mike Stephenson delivers the following benefits: source: http://biztalkbddsample.codeplex.com – Video 1. Requirements can be easily defined using Given/When/Then Requirements are close to the code so easier to manage as features and scenarios Requirements are defined in domain language The feature files can be used as part of the documentation The documentation is accurate to the build of code and can be published with a release The scenarios are effective to document the scenarios and are not over excessive The scenarios are maintained with the code There’s an abstraction between the intention and implementation of tests making them easier to understand The requirements drive the testing These same tests can also be used to drive load testing as described here. If you don't do this ... If you don't follow the above “Stubbed Integration Tests” approach, the developer will need to manually trigger the tests. This has the following risks: Developers are unlikely to check all the scenarios each time and all the expected conditions each time. After the developer leaves, these manual test steps may be lost. What test scenarios are there?  What test messages did they use for each scenario? There is no mechanism to prove adequate test coverage. A test team may attempt to automate integration test scenarios in a test environment through the triggering of tests from a source system UI. If this is a replacement for BizUnit tests, then this carries the following risks: It moves the tests downstream, so problems will be found later in the process. Testers may not check all the expected conditions within the BizTalk infrastructure such as: event logs, suspended messages, etc. These automated tests may also get in the way of manual tests run on these environments.

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• Bouygues Telecom Gains a 360-Degree Overview of Customers and Improves Offer Acceptance Rates

  - by user511693

  With more than 10 million mobile customers and 500,000 landline customers, the mission of Bouygues Telecom is to become the premier mobile, landline, television, and internet brand in France, by focusing on customer acquisition, advice, service, and support. Project challenges included: Leverage every customer relationship and increase customer loyalty through personalized offers or promotions on landline or mobile phone contracts Build on marketing campaigns and take advantage of incoming contacts from the company’s call center, Web, and retail stores Improve acceptance rates of communication service offers “Thanks to Oracle’s Siebel CRM solutions and Oracle Real-Time Decisions, we can now meet customer requests faster, personalize offers to improve the services we provide, and gain feedback on responses to offers. This enhances our knowledge of our customers before our next contact with them, whether through the Web site, call center, or our Club retail stores.” – Eric Dobremer, IT Manager - Grand Public CRM Development, Bouygues Telecom Read about results here.

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• Square game map rendered as sphere

  - by Roflha

  For a hobby project of mine I have created a finite voxel world (similar to Minecraft), but as I said, mine is finite. When you reach the edge of it, you are sent to the other side. That is all working fine along with rendering the far side of the map, but I want to be able to render this grid as a sphere. Looking down from above, the world is a square. I basically want to be able to represent a portion of that square as a sphere, as if you were looking at a planet. Right now I am experimenting with taking a circular section of the map, and rendering that, but it look to flat (no curvature around the edges). My question then, is what would be the best way to add some curvature to the edges of a 2d circle to make it look like a hemisphere. However, I am not overly attached to this implementation so if somebody has some other idea for representing the square as a planet, I am all ears.

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• Using EPEL repos with Oracle Linux

  - by wcoekaer

  There's a Fedora project called EPEL which hosts a set of additional packages that can be installed on top of various distributions such as Red Hat Enterprise Linux, CentOS, Scientific Linux and of course also Oracle Linux. These packages are not distributed by the distribution vendor and as such also not supported by the vendors (including Oracle) however for users that want to pick up some extras that are useful, it's very easy to do this. All you need to do is download the EPEL RPM from the website, install it on Oracle Linux 5 or Oracle Linux 6 and run yum install or yum search to get the packages. example : # wget http://download.fedoraproject.org/pub/epel/6/i386/epel-release-6-5.noarch.rpm # rpm -ivh epel-release-6-5.noarch.rpm # yum repolist Loaded plugins: refresh-packagekit, rhnplugin repo id repo name status epel Extra Packages for Enterprise Linux 6 - x86_64 7,124 The folks that build these repositories are doing a great job at adding very useful packages. They are free, but also unsupported of course.

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• Comprehensive redesigns

  - by Chris Skardon

  So, last night I realised that I’d made some bad decisions with the database, structure and naming, so… I’ve now refactored it all, and I’m feeling… hmmm… meh about it. I suspect I will redo it all later, but for now it will do…. I’ve also come to the conclusion that I was maybe trying too much for the initial release, so as a consequence I have removed one part of the project… (which, by-the-by, I intend to have published in a month or so – and yes Andy, that is one month longer than I mentioned to you in that email :)) @Html.DisplayFor() I find myself using DisplayFor a lot at the moment, is this correct? I mean – it works, but is that really only for forms? Do I need to use it? Should I use it?

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• What are the advantages and disadventages of git or bzr + rsync vs rdiff-backup?

  - by Azendale

  I used to use rsync to do backups, but then I switched to rdiff-backup to incremental backups. Recently, I discovered git and bzr while working on a coding project. So, I was thinking, I could have my backup disk be a repository in either git or bzr. Then I could rsync to the repository, and commit the changes. Would there be any performance concerns with this? Any other issues that I'm not thinking of? The benefit I see in using rsync is that you can restart an interrupted transfer, while rdiff-backup reverts to the last version, and then starts again. Any reason not to do it this way? Anything I'm not thinking of?

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• How do you set up PhysFS for use in a game?

  - by ThePlan

  After my recent question on GD I've been advised to use PhysFS to pack all my game data in 1 file. So I have, and the decission wasn't light, because I've tried out every library in my answers but none contained a single good tutorial whatsoever, in fact PhysFS is the poorest documented library I've ever seen. After attempting to set up PhysFS in my game I realized it's not as simple as adding the headers to the project, it appears something much more complicated, in fact after my first attempt to install PhysFS the compiler ran out of memory to display errors, it reached the critical count of 50 errors. So basically what I'm asking here is: How can I set up PhysFS on my game? I'm using Code::Blocks IDE on Windows XP SP3;

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• how difficult to add vibration/feedback to a open source driving game

  - by Jonathan Day

  Hi, I'm looking to use SuperTuxKart as a basis for a PhD research project. A key requirement for the game is to provide vibration feedback through the controller (obviously dependant on the controller itself). I don't believe that the game currently includes this feature and I'm trying to get a feel for how big a challenge it would be to add. My background is as a J2EE and PHP developer/architect, so I don't know C++ as such, but am prepared to give it a crack if there are resources and guides to assist, and it's not a herculean task. Alternatively, if you know of any open source games that do include vibration feedback, please feel free to let me know! Preferably the game would be of the style that the player had to navigate a character (or character's vehicle) over a repeatable course/map. TIA, JD

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• Languages with similar features to JavaFX Script

  - by bunglestink

  I just completed a small project in JavaFX, only finding that it has been declared dead by Oracle. JavaFX Script actually seemed to be a pretty interesting language with some neat features for its domain, particularly with bind for data binding and on replace for triggered events. These features actually make the language very useful for small, quick, RIA type apps, which leads to my question: Are there any mainstream languages with features similar to bind and on replace? After working with JavaFX, I got some ideas for some small personal (academic) projects that could take advantage of these features, but I would prefer to not start anything new in a language considered extinct by its owners.

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• Creating a SOLID Visual Studio Solution

  The SOLID acronym describes five object-oriented design principles that, when followed, produce code that is cleaner and more maintainable. The last principle, the Dependency Inversion Principle, suggests that details depend upon abstractions. Unfortunately, typical project relationships in .NET applications can make this principle difficult to follow. In this article, I'll describe how one can structure a set of projects in a Visual Studio solution such that DIP can be followed, allowing for the creation of a SOLID solution. You can download the sample solution and use it as a starting point for your new solutions if you like.

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• Love2D engine for Lua; What about 3D?

  - by shadowprotocol

  Lua has been really awesome to learn, it's so simple. I really enjoy scripting languages, and I had an equally enjoyable time learning Python. The Love engine, http://love2d.org/, is really awesome, but I'm looking for something that can handle 3D as well. Is there anything that accommodates 3D in Lua? I'm still intrigued by the particle system of LOVE anyway and may just turn my idea into a 2D project with Particle lighting :) EDIT: I removed comments about Python - I want this to be a Lua topic. Thanks

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• Developing a DVR software using a hardware KIT

  - by Leron

  I'm currently thinking about a project for my masters degree graduation. I start researching for options to make my own video streaming software based on a premade hardware kit having not much knowledge about what I'll exactly need that will match my needs. My search led me to the DVR (Digital Video Recorder) cards which seems to be the closest to what I need, but still I can't find out a few basic things so I decide to ask for them here. Currently I haven't find a lot of manufacturers that offers such kits so where I can look and have some options to choose from? There are a lot of DVR products on the market but they already have a software written for them and even if I buy one they just don't give any documentation or sdk's so buying such is not an option I need a DVR card made exactly for software programers and not end users. Are there a preferred manufacturers that provide such kind of devices with good and developer-friendly documentation? Also - I prefer to do all this with Java, is this an option (I think I will make it with .NET too but really prefer Java as a language of choice)

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• How to shift development culture from tech fetish to focusing on simplicity and getting things done?

  - by Serge

  Looking for ways to switch team/individual culture from chasing latest fads, patterns, and all kinds of best practices to focusing on finding quickest and simplest solutions and shipping features. My definition of "tech fetish": Chasing latest fads, applying new technologies and best practices without considering product/project impact, focusing on micro optimization, creating platforms and frameworks instead of finding simple and quick ways to ship product features. Few examples of culture differences: From "Spent a day on trying to map database query with five complex joins in NHibernate" to "Wrote a SQL query and used DataReader to pull data in" From "Wrote super-fast JSON parser in C++" to "Used Python to parse JSON response and call C++ code" From "Let's use WCF because it supports all possible communication standards" to "REST is simple text-based format, let's stick with it and use simple HTTP handlers"

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• Why does java.util.ArrayList allow to add null?

  - by Alfredo O

  I wonder why java.util.ArrayList allows to add null. Is there any case where I would want to add null to an ArrayList? I am asking this question because in a project we had a bug where some code was adding nulls to the List and it was hard to spot where the bug was. Obviously a NullPointerException was thrown but not until another code tried to access the element. The problem was how to locate the code that added the null object. It would have been easier if the ArrayList throwed an exception in the code where the elements was being added.

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• Have you used a Framework/Lib whose LGPL License? if yes, what are the impressions of your customers?

  - by Smarty Twiti

  I am trying to make my first app for sale, I would like to ask some questions for those who have already sold their software: Have you used a Framework/Lib whose LGPL License? if yes, what are the impressions of your customers? for example, if your customers/ competitors from the market reveal technology/secrets that you used in your solution (as LGPL requires that you make a Dynamic Link (.DLL) for your libs and you clearly tell the use of a Lib/Framework). Full story: For my project, I used a framework LGPL/commercial (Dual License) the second one it was too expensive (about 3000 USD) which pushed me to use LGPL however I still concerned. That is why I ask for advise and especially motivations.

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• OpenSource license with commerial-use exemptions for the owner

  - by dbkk

  I'm looking for an open source license which grants me additional privileges. Features: Anyone can freely modify, fork, use the code, as long as they make their source changes publicly available. They can use it in other open source projects, but not in closed-source projects. Only I and entities I specifically designate can use the code as part of a closed-source application. I am also exempt from the duty to publish the source code changes. I'm not trying to forbid the commercial use, just to allow myself more flexibility to use the code, while still contributing to open source. I don't want to burn myself by being legally forbidden from using the libraries I wrote in my commercial projects. Large companies use such dual licenses to maintain an open source project, while also selling the premium version. Which licenses of this type are available? What caveats or obstacles exist?

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• How do you remember where in your code you want to continue next time?

  - by bitbonk

  When you interrupt the work on some code (be it because you have to work on something else or go on vacation or simply because it is the end of the day), once you close that Visual Studio project, what is your preferred way to remember what you want to do next when you start working on that code again. Do you set a Visual Studio bookmark or do write down something like // TODO: continue here next time? Maybe you have a special tag like // NEXT:? Do you put a sticky note on your monitor? Do you use a cool tool or Visual Studio plugin I should know? Do you have any personal trick that helps you find the place in your code where you left off the last time you worked on your code?

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• Google I/O 2010 - Connect enterprise apps w/ Google Docs

  Google I/O 2010 - Connect enterprise apps w/ Google Docs Google I/O 2010 - Connecting your enterprise applications with Google Docs and Sites Enterprise 201 Eric Bidelman, Vijay Bangaru, Matthew Tonkin (Memeo Inc) Learn how your organization can harness the power of Google Docs and Sites directly from within your existing enterprise systems using our extensive APIs. Integrate with data from behind the firewall using Secure Data Connector. Upload, share, collaborate, and sync any file to Docs. Even automate the creation of project and team workspaces in a single click in Sites from within your CRM. For all I/O 2010 sessions, please go to code.google.com From: GoogleDevelopers Views: 18 0 ratings Time: 53:19 More in Science & Technology

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• How to get client machine ip address in custom realm? [on hold]

  - by Sumit

  I want to get client machine ip address in my custom Realm when client attempt to login basically here is detail requirement of project User having role 'Admin' can add new users and assign multiple roles and permission ,and at the same time specify list of ip address and countries to restrict them to access website. All these information i am storing in database. So basically till now i am using shiro default 'authc' filter but now i want ip address of client machine and get country from where request is coming and check it against database and then and then only allow access to website. Any help..? Thanks and regards

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