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• Does Your Business Really Need a Search Engine Optimization Specialist?

  If you're an individual or an organization planning to employ a search engine optimization professional, you might first want to consider the possibility of doing this work yourself. Certainly, a search engine optimization consultant can boost your site and perhaps help save you time and effort, yet the fact is that SEO is hardly an advanced science, and there are just a handful of authentic professionals within the field. So, if you depend on somebody else to be in charge of your search engine optimization, there's a high probability that the person will not possess a great deal more knowledge than you. And if you lack any knowledge, all the relevant information is easy to obtain.

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• Should Equality be commutative within a Class Hierachy?

  - by vossad01

  It is easy to define the Equals operation in ways that are not commutative. When providing equality against other types, there are obviously situations (in most languages) were equality not being commutative is unavoidable. However, within one's own inheritance hierarchy where the root base class defines an equality member, a programmer has more control. Thus you can create situations where (A = B) ? (B = A), where A and B both derive from base class T Substituting the = with the appropriate variation for a given language. (.Equals(_), ==, etc.) That seems wrong to me, however, I recognize I may be biased by background in Mathematics. I have not been in programming long enough to know what is standard/accepted/preferred practice when programming. Do most programmers just accept .Equals(_)may not be commutative and code defensibly. Do they expect commutativity and get annoyed if it is not. In short, when working in a class hierarchy, should effort me made to ensure Equality is commutative?

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• Consuming OData based Rest service in C# [en-US]

  - by ruimachado

  Nowadays comunication between applications is an active topic with daily usage and a large amount of pratical appliances. While developing an app in witch I had to consume an OData I found out that combining Linq with my code made this operation pretty easy.The algorithm to consume OData starts with adding a service reference to Visual Studio:After adding the service reference in wich you define the uri to the service, we start building our code.In your code the algorithm is the following:Define the Uri to your OData ServiceDefine the context of your odata, wich contains all entities exposed by the service.Query the context using LinqPrint the resultEasy and simple.Example code:01public static void Main(string[] args){02 03        Uri serviceUri= newUri("http://example.host.odataservice.net/service.svc", UriKind.Absolute);04        ODataService.ServiceEntities context = newODataService.ServiceEntities (serviceUri);05 06        context.Credentials = newSystem.Net.NetworkCredential(Username,Password);07 08         var query = from ServiceObject in context.YourEntity09                     select ServiceObject ;10 11        foreach (var myObject in query)12        {13            Console.WriteLine("\n Field1: {0} | Field2: {1}",14            myObject .Field1, myObject .Field2);15 16        }17}That’s it.Thank you,Rui Machadorpmachado.wordpress.com

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• Domain resolution - local first then external

  - by stefgosselin

  I would like to know how I can configure my dns settings so that domain is resolved locally first, then if not resolved it goes to external DNS. I had this working before, I am using Ubuntu through a VM and need the local domain to resolve first but since I have upgraded I had to reconfigure network and now it works only external, local host file does not seem to even be used. Is there an easy way to check this out? I did slap it up in google but no specific answer seemed to match my case and I too tight on delivery deadline to test-and-try different approaches. You guys rock, thanks.

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• mysqld - master to slave replication using rsync innodb, sequence number issues

  - by Luis

  I've read several of the related topics posted here, but I have not been able to avoid this innodb error. The steps I've taken to replicate data from a Slackware server - 5.5.27-log (S) to a FreeBSD slave - 5.5.21-log (F) were these: (S) flush tables with read lock; (S) in another terminal show master status; (S) stop mysqld via command line in third terminal; (F) while both servers are stopped, rsync mysql datadir from (S), excluding master.info, mysql-bin and relay-* files; (F) start mysqld (skip-slave) 121018 12:03:29 InnoDB: Error: page 7 log sequence number 456388912904 InnoDB: is in the future! Current system log sequence number 453905468629. InnoDB: Your database may be corrupt or you may have copied the InnoDB InnoDB: tablespace but not the InnoDB log files. See InnoDB: http://dev.mysql.com/doc/refman/5.5/en/forcing-innodb-recovery.html InnoDB: for more information. This kind of error happens for a lot of tables. I know I can use dump, but the database is large, ca. 70GB and the systems are slow (old), so would like to get this replication to work with data transfer. What should I try to solve this issue?

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• Verify SQL Server Stored Procedures are the same on multiple servers

  I have a stored procedure I push down to all of my servers that does a custom backup job and I want to make sure all servers have the same stored procedure. Is there some way to check without going to each server and reviewing the stored procedure? Check out this to find out. New! SQL Monitor 3.0 Red Gate's multi-server performance monitoring and alerting tool gets results from Day One.Simple to install and easy to use – download a free trial today.

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• Methods and practices for managing a network that has no internet connection

  - by FaultyJuggler

  Originally asked in Super User but realized this belongs here. Long story short, I am setting up a network with 32 servers of varying specs that will be used for testing and development. We will be using RedHat Linux, we also do not have a router as of yet and were looking into making one of the servers act as our router/DHCP etc. The small cluster will be on an isolated network with no internet. I can use external harddrives and discs to transfer anything from external sources into machines on the network, so this isn't a locked down secure network, it just won't have a direct connection to the outside world. I've worked on such setups before, but always long after they were setup. So I'm reaching out to see what everyone knows as far as how groups have handled initial setup and maintenance of such a situation. What is the best way to get them all configured and up to date? What are the best ways to automate updates, network wide installs, etc. With the only given that I have large multi-terabyte external hard drives that would be used to drop whatever files are needed onto a central server, how do i then distribute those files and install their contents? I've done perl scripting, some teammates have played with puppet, so we aren't completely in the dark, I just wanted to avoid reinventing the wheel since this is a common challenge.

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• Is this a reliable method of parsing glGetShaderInfoLog()?

  - by m4ttbush

  I want to get a list of errors and their line numbers so I can display the error information differently from how it's formatted in the error string and also to show the line in the output. It looks easy enough to just parse the result of glGetShaderInfoLog(), look for ERROR:, then read the next number up to :, and then the next, and finally the error description up to the next newline. However, the OpenGL docs say: Application developers should not expect different OpenGL implementations to produce identical information logs. This makes me worry that my code may behave incorrectly on different systems. I don't need them to be identical, I just need them to follow the same format. So is there a better way to get a list of errors with the line number separate, is it safe to assume that they'll always follow the "ERROR: 0:123:" format, or is there simply no reliable way to do this?

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• Online File Library

  - by janvdl

  I'm looking for a preferably PHP and web based system, to run on Ubuntu server. Basically it should be a "file forum" in the sense that users can register and be approved to post files to categories. Users with "read" privileges can then go through the categories and download files. Basically I sort of want a FTP-like system, but it should be as easy to manage users, categories, etc as that of a forum system like vB or phpBB. If it could have a forum look and feel that would also be great, but I don't want any discussions taking place.

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• Testing complex compositions

  - by phlipsy

  I have a rather large collection of classes which check and mutate a given data structure. They can be composed via the composition pattern into arbitrarily complex tree-like structures. The final product contains a lot of these composed structures. My question is now: How can I test those? Albeit it is easy to test every single unit of these compositions, it is rather expensive to test the whole compositions in the following sense: Testing the correct layout of the composition-tree results in a huge number of test cases Changes in the compositions result in a very laborious review of every single test case What is the general guideline here?

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• How do I create my own Ubuntu version? [closed]

  - by Alvar

  Possible Duplicate: How to customize live Ubuntu CD? I don't like unity and I don't like xubuntu or kubuntu that much, so I want to know how I can create my own Ubuntu distro! I want: a GUI only a terminal installed (no other unnecessary programs.) I don't want Unity no browser, games, text editors or video players. I basically want a distro that is easy to set up the way you want it. So as many ppa should be added as default. Is this at all possible?

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• Separate parts of a game engine [on hold]

  - by user272716

  I'm pretty new in developing videogames. By now I only used SDL with C/C++ to create games. I'm currently learning OpenGL and I realized that to be fluid and easy to maintain the code must be logically separated. Since I want to use OpenGLES on iOS and Android I was wondering how the engine must be imagined in a technical way, some questions came up: Do I have to separate input/update functions from draw functions in different threads? Is there only one proper way to think a game engine/loop? What kind of assets should I use to create a 3D game using openGl ES to get better performance?

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• Separating Db from business with Inherited classes using multiple views

  - by catalinux

  I have a software that has a car model that will be used in different views (listing, ads, detail page, carousel, up sell widget,etc). class CarModel extends DbModel{ } I look for a "nice way" (a combination of flexible, easy to maintain,etc) to have this used in views. I'm thinking at two different ways Having object views for each context CarViewBase{ var car;// of type CarModel function constructor(args){ //will instantienta internal variable car based on args } function getThumb(){ } function getTitle(){ } } CarListingView extends CarViewBase{ function getListing(){ } } CarAdsView extends CarViewBase{ //the busines rule changes for ads widget function getThumb(){ } } Extending directly the CarModel The challenges comes when My Car Model might need an abstract factory. Let's say I have a field on my car object that states the type of the car : a truck, or a bike, or van. How would affect that my object view? Let's say that getTitle() rule would be different for each type of it. How would you do it?

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• How should dependencies be managed across a modular application?

  - by bear

  Let's say that we have a structure like this: Application -- Modules --Module1 -- Controller -- PublicHelper --Module2 -- Controller -- PublicHelper Whereby a module's Public Helper can provide helper functions. In nearly every module helper, the helper needs to access another module's public helper methods. Let's say for instance, in a PHP application: Module1 provides functionality to create a sale, and as part of the class Module1PublicHelper extends AbstractModuleHelper { public function createSale($customerId, $param, $param) { $userPublicHelper = // grab an instance of the user public helper $currentUser = $userPublicHelper->getCurrentUser(); } } class Module2PublicHelper extends AbstractModuleHelper { public function getCurrentUser() { //do something return $user; } } In this situation, the method needs to obtain an instance, either new or whatever of the user public helper. Given that all of Module Public Helper classes are instantiated with a minimum set of constructor params, e.g. EntityManager, what would be the best way to get a copy of it? Obviously, we can't really inject the user public helper class into the class containing createSale One solution would be to use a service locator or registry, however, testing the application isn't exactly easy.

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• Email Job Failures Report to DBA using PowerShell

  MySQL introduced its own brand of job scheduling, called Events, in version 5.1. However, some Database Administrators (DBAs) feel that it isn't quite ready for prime time. This article presents a hybrid solution that uses MySQL Event Scheduling to manage the batch jobs and Windows PowerShell for the error handling. Does your database ever get out of sync?SQL Connect is a Visual Studio add-in that brings your databases into your solution. It then makes it easy to keep your database in sync, and commit to your existing source control system. Find out more.

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• Global Email Forwarding with EXIM?

  - by Dexirian

  Been trying to find a solution to this for a while without success so here i go : I was given the task to build a High-Availability Load-Balanced Network Cluster for our 2 linux servers. I did some workaround and managed to get a DNS + SQL + Web Folders + Mails synchronisation going between both. Now i would like my server 2 to only do mailing and server 1 to only do web hosting. I transfered all the accounts for 1 to 2 using the WHM built-in account transfert feature. I created 2 different rsync jobs that sync, update, and delete the files for mail and websites. Now i was able to successfully transfer 1 mail accounts from 1 to 2, and the server 2 works flawlessly. All i had to do was change the MX entries to point to the new server and bingo. Now my problem is, some clients have their mail softwares configured so that they point to oldserver.domain.com. I cant make the (A) entry of oldserver.domain.com point to the new server for obvious reasons. I thought of using .foward files and add them to the home directories of the concerned users but that would be very difficult. So my question is : Is there a way to configure exim so that it will only foward mails to the new server? I need to change all the users so they use their mail on server 2 without them doing anything. Thanks! EDIT : TO CLARIFY MY PROBLEM Some clients have their mail point to oldserver.xyz instead of mail.olderserver.xyz I want to know if i can do something to prevent modifying the clients configuration I would also like to know is there is a way to find out what clients aren't properly configured

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• better site analytics service / script: real time statistics and time spent on pages?

  - by toPeerOrNotToPeer

  I'm looking for a site analytics software (service or script) that must be easy to comprehend. GA is simply too much complicated and it misses some key features (for me). Missing features are: real time statistics (very important) time spent on page (very important) about the "time spent on page"... i do really need a statistics software that does not calculate the time between two page views. this is not useful at all in my case. because i mostly do 1 pageview = 1 user but something that logs, for example, every 10 seconds spent on a page thank you in advance

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• Sprite.js surface background

  - by user1086671

  I'm making a tile-based game using Sprite.js. It is not easy to redraw every tile each frame, so I tried to make a scrolling surface background. There is an example here http://batiste.dosimple.ch/sprite.js/tests/test_scrolling.html The example works, but it seems like ScrollingSurface.update is buggy or there is something I'm missing. What I tried to do is to draw 5x5 tiles and after 5 seconds draw another 5x5 tiles near the first ones. But it draws only the first ones. And surface.update() only updates the position of surface. Here is my code https://github.com/Sektoid/sprite.js/blob/master/tests/test_scrolling.html (You need also to set this.divider = 1.0 in scrolling.js to avoid drawing the same tiles 4 times.) There aren't any sprite.js-forums like with the other sprite- and game-engines have, so I'm asking here.

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• Downgrading Mercurial in MacPorts

  - by $utils.escapeXML($entry.author)

  Another Mercurial release, another broken extension. Mercurial 2.3 breaks hgforest ... once more. Of course, with open source, the notion of backwards compatibility is sometimesoften left as an exercise for the curious readers of said source code, so until someone gets around to fix up hgforest ... once more, to keep up with Mercurial's churn, one way to get hgforest working again is to downgrade to Mercurial 2.2.3, for example. In MacPorts, assuming you have installed Mercurial 2.2.3 before, and it was updated to the broken Mercurial 2.3 version, it's pretty easy to get back to a working state: sudo port deactivate [email protected]_1sudo port activate [email protected]_0

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• how to use version control

  - by ptamzz

  I'm developing a web site in php in localhost and as modules of it gets completed, I upload it on the cloud so that my friends can alpha test it. As I keep developing, I've lots of files and I lose track of which file I've edited or changed etc. I've heard of something as 'version control' to manage all those but am not sure how it works. So, my question is: Is there an easy way/service/application available to me to track all the edits/changes/new files and manage the files as I develop the website. As Soon as I'm done with a module, I want to upload it on the cloud (I'm using Amazon Cloud Service). If something happens to the new files, I might want to get back to the old file. And maybe, in a click or two, I get to see the files which I've edited or changed since the last one I've uploaded?

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• Can't connect to FTP server from a specific location

  - by wv_pip

  Last week while uploading website files to our server via FTP, the transfer failed. Ever since then, I haven't been able to connect to the server from work. I can connect just fine from home, or by using an FTP app on my cell phone as long as I'm on the cell network. I can't access the server from any machine on my work network. It's not a credential issue, either. The error message that I always get says that a connection cannot be established, and I am never prompted for my credentials. I have changed absolutely nothing on our domain controller or our firewall/router. I've contacted our ISP (who hosts the website/FTP server) and they can't find anything wrong on their end. They insist that it must be something here at the office that is blocking access. I've also tested access to other FTP servers (ea.com, nvidia.com, etc.) so I know that port 21 is not being blocked. I'm totally stumped. Any help is much appreciated. EDIT: wireshark info here: http://www.cloudshark.org/captures/85a118ae9296?filter=ip.dst%3D%3D66.118.64.208

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• Off-Page SEO - The Ethos of Backlinking

  I want to delve under the bonnet more regarding off-page, so let's get to it! How do we get backlinks to our site? It may seem easy and what springs to mind for many is to ask someone to link to your site while in return you link back to theirs. In general this is a very fair and sensible undertaking, it really is. However, in Google's eyes and perhaps in the other two big search engines too now, its not counted as a valuable link any longer.

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• Private downloads [on hold]

  - by user1314836

  I am setting up a personal website and I would like to be able to share certain files with friends (e.g. photo albums or documents). Of course, each of the files should only be accessible to certain people, for example with a password or a private address. I would like to have a simple system, easy to maintain. I'm quite sure that Wordpress would let me know do something but keeping a Wordpress installation just for sharing a few files per month seems too much work. I am thinking of using the Apache capabilities for folder or file password protecting. Is this the best idea? Or would it be better just to block the directory navigation so that only people with the full path for each of the files can download them? Thanks!

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• Capture text typed by user on website and allow user to email a link to someone else so that they can view the message [on hold]

  - by Dano007

  Using the following html, css,jquery, js, what would be the best approach to achieving this. A visitor hits the website. The website page is displaying html and a css3 animation. The visitor is given the option to enter text freely into a text box, they enter an email address and hit send. The person receiving the message gets an email with a link, when they click the link it takes them to the webpage with the animation and the custom message their friend entered. Is this easy to achieve, what would be the best approach? anyone know of existing code I could use? Thanks

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• Visual Studio 2012 and Game Development

  - by amongrain

  Alright, I think it's a simple question, but I got difficulties to find some answers around. I already read that XNA wouldn't be in Visual Studio 2012. I recently learned to use XNA, but since I would like to work on games, I'd like to know if there's a way to develop games using C# on Visual Studio 2012, or if I should learn everything again using C++ and Direct3D? C# is a language I like a lot, so if there's no way to do it in C# but something quite easy to use Java for game development, I'd also be interested. Thanks a lot!

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