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• Do search engines index mailto and tel links?

  - by Question Overflow

  I have a website that allows users to display their email address and contact number on their public profile page. These would be in link format, example: <a href="mailto:user%40email.com" title="email user">[email protected]</a> <a href="tel:+123456789" title="call user">+123456789</a> I was wondering if it is necessary at all to add a rel="nofollow" tag to these. Do search engines follow and index these?

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• Code Design question, circular reference across classes?

  - by dsollen

  I have no code here, as this is more of a design question (I assume this is still the best place to ask it). I have a very simple server in java which stores a mapping between certain values and UUID which are to be used by many systems across multiple platforms. It accepts a connection from a client and creates a clientSocket which stores the socket and all the other relevant data unique to that connection. Each clientSocket will run in their own thread and will block on the socket waiting for a read. I expect very little strain on this system, it will rarely get called, but when it does get a call it will need to respond quickly and due to the risk of it having a peak time with multiple calls coming in at once threaded is still better. Each thread has a reference to a Mapper class which stores the mapping of UUID which it's reporting to others (with proper synchronization of course). This all works until I have to add a new UUID to the list. When this happens I want to report to all clients that care about that particular UUID that a new one was added. I can't multicast (limitation of the system I'm running on) so I'm having each socket send the message to the client through the established socket. However, since each thread only knows about the socket it's waiting on I didn't have a clear method of looking up every thread/socket that cares about the data to inform them of the new UUID. Polling is out mostly because it seems a little too convoluted to try to maintain a list of newly added UUID. My solution as of now is to have the 'parent' class which creates the mapper class and spawns all the threads pass itself as an argument to the mapper. Then when the mapper creates a new UUID it can make a call to the parent class telling it to send out updates to all the other sockets that care about the change. I'm concerned that this may be a bad design due to the use of a circular reference; parent has a reference to mapper (to pass it to new ClientSocket threads) and mapper points to parent. It doesn't really feel like a bad design to me but I wanted to check since circular references are suppose to be bad. Note: I realize this means that the thread associated with whatever socket originally received the request that spawned the creation of a UUID is going to pay the 'cost' of outputting to all the other clients that care about the new UUID. I don't care about this; as I said I suspect the client to receive only intermittent messages. It's unlikely for one socket to receive multiple messages at one time, and there won't be that many sockets so it shouldn't take too long to send messages to each of them. Perhaps later I'll fix the fact that I'm saddling higher work load on whatever unfortunate thread gets the first request; but for now I think it's fine.

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• What is the most appropriate testing method in this scenario?

  - by Daniel Bruce

  I'm writing some Objective-C apps (for OS X/iOS) and I'm currently implementing a service to be shared across them. The service is intended to be fairly self-contained. For the current functionality I'm envisioning there will be only one method that clients will call to do a fairly complicated series of steps both using private methods on the class, and passing data through a bunch of "data mangling classes" to arrive at an end result. The gist of the code is to fetch a log of changes, stored in a service-internal data store, that has occurred since a particular time, simplify the log to only include the last applicable change for each object, attach the serialized values for the affected objects and return this all to the client. My question then is, how do I unit-test this entry point method? Obviously, each class would have thorough unit tests to ensure that their functionality works as expected, but the entry point seems harder to "disconnect" from the rest of the world. I would rather not send in each of these internal classes IoC-style, because they're small and are only made classes to satisfy the single-responsibility principle. I see a couple possibilities: Create a "private" interface header for the tests with methods that call the internal classes and test each of these methods separately. Then, to test the entry point, make a partial mock of the service class with these private methods mocked out and just test that the methods are called with the right arguments. Write a series of fatter tests for the entry point without mocking out anything, testing the entire functionality in one go. This looks, to me, more like "integration testing" and seems brittle, but it does satisfy the "only test via the public interface" principle. Write a factory that returns these internal services and take that in the initializer, then write a factory that returns mocked versions of them to use in tests. This has the downside of making the construction of the service annoying, and leaks internal details to the client. Write a "private" initializer that take these services as extra parameters, use that to provide mocked services, and have the public initializer back-end to this one. This would ensure that the client code still sees the easy/pretty initializer and no internals are leaked. I'm sure there's more ways to solve this problem that I haven't thought of yet, but my question is: what's the most appropriate approach according to unit testing best practices? Especially considering I would prefer to write this test-first, meaning I should preferably only create these services as the code indicates a need for them.

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• Can the Abstract Factory pattern be considered as a case of polymorphism?

  - by rogcg

  I was looking for a pattern/solution that allows me call a method as a runtime exception in a group of different methods without using Reflection. I've recently become aware of the Abstract Factory Pattern. To me, it looks so much like polymorphism, and I thought it could be a case of polymorphism but without the super class WidgetFactory, as you can see in the example of the link above. Am I correct in this assumption?

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• Will setInterval give me Delay?

  - by Oliver Schöning

  I am setting up a JavaScript Server for my Game. Am I understanding this correctly: If I use setInterval to call a function every second, and takes 2 seconds to process. Then I am going to "stack up" requests indefinetly the Client will become more and more out of sync? If I use setTimeout, and specify 1 second. Then the function will run (again, lets say 2 seconds) and then start the timeout. And not stack up requests.

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• Critically Essential On-The-Page Search Engine Optimization Factors

  This is the stuff you have on your web page and how relevant that is to what people are searching for. We call these on-page factors. The good thing with these is that you can optimize them pretty easily.

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• The Defensive Patent License makes patents less evil for open source

  <b>Network World: </b>"Two law professors from UC Berkeley have come up with a novel idea to protect open source developers from patent bullies. They call it the Defensive Patent License. They hope the DPL can address the objections FOSS developers have with patents the way the GPL addressed them for copyright."

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• "Whole-team" C++ features?

  - by Blaisorblade

  In C++, features like exceptions impact your whole program: you can either disable them in your whole program, or you need to deal with them throughout your code. As a famous article on C++ Report puts it: Counter-intuitively, the hard part of coding exceptions is not the explicit throws and catches. The really hard part of using exceptions is to write all the intervening code in such a way that an arbitrary exception can propagate from its throw site to its handler, arriving safely and without damaging other parts of the program along the way. Since even new throws exceptions, every function needs to provide basic exception safety — unless it only calls functions which guarantee throwing no exception — unless you disable exceptions altogether in your whole project. Hence, exceptions are a "whole-program" or "whole-team" feature, since they must be understood by everybody in a team using them. But not all C++ features are like that, as far as I know. A possible example is that if I don't get templates but I do not use them, I will still be able to write correct C++ — or will I not?. I can even call sort on an array of integers and enjoy its amazing speed advantage wrt. C's qsort (because no function pointer is called), without risking bugs — or not? It seems templates are not "whole-team". Are there other C++ features which impact code not directly using them, and are hence "whole-team"? I am especially interested in features not present in C. Update: I'm especially looking for features where there's no language-enforced sign you need to be aware of them. The first answer I got mentioned const-correctness, which is also whole-team, hence everybody needs to learn about it; however, AFAICS it will impact you only if you call a function which is marked const, and the compiler will prevent you from calling it on non-const objects, so you get something to google for. With exceptions, you don't even get that; moreover, they're always used as soon as you use new, hence exceptions are more "insidious". Since I can't phrase this as objectively, though, I will appreciate any whole-team feature. Appendix: Why this question is objective (if you wonder) C++ is a complex language, so many projects or coding guides try to select "simple" C++ features, and many people try to include or exclude some ones according to mostly subjective criteria. Questions about that get rightfully closed regularly here on SO. Above, instead, I defined (as precisely as possible) what a "whole-team" language feature is, provide an example (exceptions), together with extensive supporting evidence in the literature about C++, and ask for whole-team features in C++ beyond exceptions. Whether you should use "whole-team" features, or whether that's a relevant concept, might be subjective — but that only means the importance of this question is subjective, like always.

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• Landing Page Design is Not Formulaic - Part 5

  You must have heard a lot about the fact that if anything does not lead to call-to-action, then it will not benefit you but if you want to get maximum results from your search engine marketing, then you need to look out for various SEO technique to design your landing page. If you are planning to include a 'buy now' button in your landing page, then it will surely use the eye-tracking technology but it will not guarantee you the conversion of your search engine marketing plan.

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• Does SEO Mean Success For Everyone Online?

  What is SEO? Well it's fair to say if you can master SEO it could mean Success for Everyone Online, but until you can let's just call it Search Engine Optimization. Search Engine Optimization is the process of selecting the most appropriate targeted keyword you want your website to rank for.

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• Trying to use stencils in 2D while retaining layer depth

  - by Steve

  This is a screen of what's going on just so you can get a frame of reference. http://i935.photobucket.com/albums/ad199/fobwashed/tilefloors.png The problem I'm running into is that my game is slowing down due to the amount of texture swapping I'm doing during my draw call. Since walls, characters, floors, and all objects are on their respective sprite sheet containing those types, per tile draw, the loaded texture is swapping no less than 3 to 5+ times as it cycles and draws the sprites in order to layer properly. Now, I've tried throwing all common objects together into their respective lists, and then using layerDepth drawing them that way which makes things a lot better, but the new problem I'm running into has to do with the way my doors/windows are drawn on walls. Namely, I was using stencils to clear out a block on the walls that are drawn in the shape of the door/window so that when the wall would draw, it would have a door/window sized hole in it. This is the way my draw was set up for walls when I was going tile by tile rather than grouped up common objects. first it would check to see if a door/window was on this wall. If not, it'd skip all the steps and just draw normally. Otherwise end the current spriteBatch Clear the buffers with a transparent color to preserve what was already drawn start a new spritebatch with stencil settings draw the door area end the spriteBatch start a new spritebatch that takes into account the previously set stencil draw the wall which will now be drawn with a hole in it end that spritebatch start a new spritebatch with the normal settings to continue drawing tiles In the tile by tile draw, clearing the depth/stencil buffers didn't matter since I wasn't using any layerDepth to organize what draws on top of what. Now that I'm drawing from lists of common objects rather than tile by tile, it has sped up my draw call considerably but I can't seem to figure out a way to keep the stencil system to mask out the area a door or window will be drawn into a wall. The root of the problem is that when I end a spriteBatch to change the DepthStencilState, it flattens the current RenderTarget and there is no longer any depth sorting for anything drawn further down the line. This means walls always get drawn on top of everything regardless of depth or positioning in the game world and even on top of each other as the stencil has to happen once for every wall that has a door or window. Does anyone know of a way to get around this? To boil it down, I need a way to draw having things sorted by layer depth while also being able to stencil/mask out portions of specific sprites.

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• alias/function with command line arguments

  - by Agzam

  I'm tired of typing manage.py startserver 10.211.55.4:4000, so decided to make an alias for that. Only thing is: the port sometime changes. So I did this in bash profile: function runserver() { python manage.py runserver 10.211.55.4:$1 } But then when I call it: runserver 3000, it starts it, but immediately stops saying: "Error: That IP address can't be assigned-to". However if I type the same thing right into command line it works with no complains.

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• How Google Will Rate Your Site

  Search Engine Optimisation should be a major part of any online businesses marketing strategy. The fact is that nowadays search engines are the first port of call for online shoppers and resultant businesses are forced to optimise to fit these engines.

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• when including a file using php function not work?

  - by John Smiith

  MY PHP FUNCTION IS function functionName() { include($_SERVER['DOCUMENT_ROOT']."/path/file.php"); } Content of File.php is $foo = 'bar'; Calling function (content of file test.php) functionName(); When call function and variable not work echo $foo; <- not works But when adding code below its works (content of file test.php) include($_SERVER['DOCUMENT_ROOT']."/path/file.php"); echo $foo; <- its works

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• Enhanced history searching in zsh

  <b>Tech Republic:</b> "If you spend any length of time in the shell, chances are you&#8217;ve typed the same commands over and over. It&#8217;s usually not anything you can necessarily script as the commands may vary slightly on each invocation, but there are certain commands that can be used often with a little variation on each call."

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• Ubuntu: Canonical Focuses on Wall Street

  <b>WorksWithU:</b> "Call it a small but strategic step in the right direction. Following in the footsteps of Red Hat and Novell, the folks at Canonical are positioning Ubuntu for use by Wall Street firms."

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• Sempron 145 core unlocking

  - by Grant

  Call me a cheapskate looking for performance, but I have a Sempron 145 processor that has been unlocked to an Athlon II X2 4450e with a GIGABYTE GA-990FXA-UD3 motherboard, but only one of the two processor cores can be used at a time. If both of the cores are enabled in the BIOS the kernel will hang during boot, If I reboot the system and disable the second core (but not re-lock the processor), it will take me to the grub and then start normally. Is there a way to enable both cores and boot without kernel hangs?

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• Mirroring: what happens if principal loses contact with both mirror and wittness?

  - by TiborKaraszi

  Imagine a database mirroring setup where you have two LANs with a WAN link in between. Let's call them site A and site B. Say that principal is currently in site A, and both mirror and witness are in site B. I.e., we are running database mirroring with a witness, and assuming we are running safety FULL (synchronous), we have auto-fail over. Now, what is really fail over when it comes to mirroring? the simple answer is that the mirror will finish the recovery process (UNDO) and make the database available....(read more)

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• How do you refer to the user using the application vs. the user being edited? [closed]

  - by Roman Royter

  Suppose you are developing an administration page where the administrator can edit other users. In your code you want to distinguish between the user sitting in front of the screen, and the user being edited. What do you call the two? User, CurrentUser, EditedUser, CurrentEditUser, etc? Note that the admin user isn't necessarily real admin, they can be just an ordinary user given rights to edit other users.

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• HTML5 : version finale pour 2014, un report est nécessaire pour développer une suite de tests d'interopérabilité d'après le W3C

  HTML5 : version finale pour 2014 Un report est nécessaire pour développer une suite de tests d'interopérabilité d'après le WC3 Mise à jour du 15/02/2011 par Idelways L'HTML5 ne sera pas prêt avant 2014 d'après la nouvelle charte de son groupe de travail aux W3C, le consortium en charge des spécifications sur lequel s'appuiera le futur du développement Web. Le standard ouvert devrait atteindre le stade du « dernier appel » (Last Call) en mai prochain, une étape charnière qui correspond à la satisfaction des exigences techniques. Les communautés des développeurs seront dès lors appelées à commenter les spéci...

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• Ubuntu: Consumer ready, Enterprise grade.

  <b>fewt@blog:~$ _:</b> "What's the best new feature coming to Lucid? You could even call this one Lucid's killer feature."

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• SEO and Online Catalog Copy - Part 2

  You've done a great job with your SEO. Google puts your site on page 1! Now, how do you get the prospect to visit your site? With an irresistible call to action!

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• How to mention your responsibilities if you are the only programmer in resume [closed]

  - by user105919

  I worked for a company for 1.5 years as web developer. As i was the only IT person in the company , i used to do all work by myself. Now i am applying for new job and i want to write all the sys admin stuff i used to do there. Now my main concern is that if the new employer call that old company then they will only say that he was web developer a sthey won't know the technical diff between sys admin and php coding. will the employer trust me or not

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• Slides and Code from “Using C#’s Async Effectively”

  - by Reed

  The slides and code from my talk on the new async language features in C# and VB.Net are now available on https://github.com/ReedCopsey/Effective-Async This includes the complete slide deck, and all 4 projects, including: FakeService: Simple WCF service to run locally and simulate network service calls. AsyncService: Simple WCF service which wraps FakeService to demonstrate converting sync to async SimpleWPFExample: Simplest example of converting a method call to async from a synchronous version AsyncExamples: Windows Store application demonstrating main concepts, pitfalls, tips, and tricks from the slide deck

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• Single API Architecture

  - by user1901686

  When people refer to an architecture that involves a single service API that all clients talk to (a client can be an iPad app, etc), what is the "client" for the web app -- is it A) the web browser itself. Thus, the entire app is written in html/css/javascript and ajax calls to the service are made to fetch data and changes are made through javascript or B) you have an MVC-like stack on a server, only instead of the controllers calling to the model layer directly, they call to the service API which return models that are used to render the traditional views or C) something else?

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