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• What HTML5 means - the sequel

  A while ago I asked what HTML5 means to you. I got a lot of replies, but would like to gather more. That’s why I’m repeating the question today. What’s in your HTML5 spec? Please add your personal top three of cool new features to the comments.I’m going to use the replies for setting priorities for my research. My next big topic is going to be offline storage, which is crucial on mobile but only mildly interesting on desktop. I’m not yet sure what I’m going to do after that, though.Eventually I’m...Did you know that DotNetSlackers also publishes .net articles written by top known .net Authors? We already have over 80 articles in several categories including Silverlight. Take a look: here.

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• Interest in Hadoop [on hold]

  - by pradeep

  I am a tech guy with around 7 yrs in IT and i basically work on LAMP technology. From past few months i have gained interest in hadoop. But i am confused on few points Is it worth investing time and money for learning hadoop? Is hadoop gonna stay for long or even big data concept gonna stay for long? Does learning and working hadoop take care of my compensation part? I have no idea about java. Is java a mandate for Hadoop. I have read answers where they say both.

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• Framework for interaction between web-page and server-side script

  - by Carrier

  I want to make a web-page that will have several controls elements, among which there are elements like check-boxes, radio-buttons, "range selectors" (one can specify the min and max value, like it is done when you select range for prices in the online markets). The new values shall be sent to the "server-side", once changed (without any Submit buttons etc), and the "server-side" can return something (one or more numbers, etc). Does anyone know a good ajax-like framework that allows (with minimal adaptation / changes) to make such solution in an easy way? It will be good if the server-side of existing solution will be in Perl (not a big deal, but I know it much better than PHP or something else). Set of controls might change and depend on other parameter, so adding one extra element should not cause rewriting the whole thing. P.S.: I haven't working in this area for quite a while, so not aware of existing solutions in this area, and don't want to invent the wheel and write everything from scratch for something that already exist (at least, I hope so). Thanks in advance!

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• What technology(s)would be suitable for the front end part of a Java web game?

  - by James.Elsey

  As asked in a previous question, I'm looking to create a small MMO that will be deployed onto GAE. I'm confused about what technologies I could use for the user interface, I've considered the following JSP Pages - I've got experience with JSP/JSTL and I would find this easy to work with, it would require the user having to "submit" the page each time they perform an action so may become a little clumsey for players. Applet - I could create an applet that sits on the front end and communicates to the back end game engine, however I'm not sure how good this method would be and have not used applets since university.. What other options do I have? I don't have any experience in Flash/Flex so there would be a big learning curve there. Are there any other Java based options I may be able to use? My game will be text based, I may use some images, but I'm not intending to have any animations/graphics etc Thanks

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• Why would i need extra IP adresses from my web host?

  - by user4524

  I am moving to a new and cheaper host. My old one raised the prices suddenly by a factor 10. Now what I did not like about the old one, was that each time I set up a new website, I had to set up a new account, with the result that I have to pay for a lot of webspace and a lot of bandwith i don't use. Now I am moving over to a new host, who cheaply offers virtual servers. Now I am a n00b when it comes to server tech. I have two questions about this: 1. Could I install all my webistes on this virtual server, provided it is big enough? 2. They offer the possibility of getting more than one IP address, but it costs more. What would be the advantage of this? Would I be able to suffice with one IP address?

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• Help installing?

  - by Meghan Dempsey

  I'm having a really big problem with installing Ubuntu on my computer. It seems that when I try to install from BIOS from the CD, nothing happens, and when I say nothing happens it boots up my computer like usual. When I try to install from the CD from My Computer directly from the wubi.exe file, nothing happens. THEN when I try to install from the boot helper, it gives me this error: An error occurred: Could not retrieve the required installation files For more information please see the log file: c:\users\Meghan\appdata\local\temp\wubi-14.04-rev286.log Will it help if I say I have a pirated version of Windows? Maybe that's why? I'm frustrated, and I'm not sure what to do. Please help me

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• Where to start a software Analysis & Designing?

  - by Muneer

  I am starting a big database oriented software to develop. I have full picture of the software in mind. I need to do the designing using UML. As there are various tools in UML such as usecase, class diagram, statechart, component diagram, deployment diagram, activity diagram and so on, where should I start my designing. Should it be from Usecase or from Class Diagram or from State Chart? which wich approach will help me to put my mind's picture in to design.? Please corporate with me. Thanks.

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• Failed to allocate memory - What is it trying to say?

  - by asprin

  In my early days of programming I often used to get memory related fatal errors in the following format: Fatal error: Allowed memory size of <some big number> bytes exhausted (tried to allocate <some small number> bytes) in /path/to/filename.php on line <some line number> I'm a little embarrassed to state that even though I have figured out how to solve them and take steps to avoid them altogether, I'm still not quite sure what exactly does the message translate to in simple words. For example, if I get a message such as: Fatal error: Allowed memory size of 67108864 bytes exhausted (tried to allocate 4000 bytes) in ........ on line 34 As things stand at the moment, I assume it to be stating that the script consumes 67108864 bytes of data, but only 4000 bytes are available during runtime. Am I right in my assumption? If not, what's the correct interpretation?

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• Joining and compressing all javascript files together - good idea?

  - by Tomáš Zato

  Curently, I avoid loading any unnecesary scripts on individual pages of my site. I have a class that remembers all javascript files that were requested during PHP processing and adds them to HTML. I was just thinking that I could merge the current set of files, save the result in special directory and let the browser download just one, big file. Since the number of possible combinations is not very high, I would end up with about 10 combined files for different pages. I've never seen that on any site. What are the reasons not to do it? I need very fast page load.

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• Domain Model and Querying

  - by Tyrsius

  I am new to DDD, having worked only in Transaction-Script apps with an anemic model, or just Big Balls of Mud, so please forgive any terminology I abuse. I am trying to understand the proper separation between the domain model and the repository. What is the proper way to construct a domain object that is coming from a database, assuming the (incredibly simplified) need to query for objects by status (returns enumerable), or by ID. Should a factory be building the objects, exposing methods for GetByStatus() and GetByID(), using a DIed repository? Should a repository be called directly, knowing how to build a domain model from the DTO? Should the domain model have a constructor for get by ID, using a DIed repoistory to load the initial state, using some other (?) method for the list? I am not really sure what the best way would be, and this question has an answer advocating each one (these are certainly mutuallu exclusive).

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• How secure is KeePassX?

  - by Uli

  I have hundreds of passwords, since I use a different random one for each website/service. They are all generated & stored with KeePassX, which can be synced to different computers and my android phone via dropbox (or ubuntuone). I know the database of KeePassX is secure (at least with a good passphrase). But what about when I am copying the password into the clipboard (where it is stored for 5 seconds)? Can any program running in user-space access the clipboard and store the password? If so, how big of a security risk is this?

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• Will a search engine lower the rank of my page if i have hidden iframes?

  - by Skurpi

  As a praxis, all external content on our site is put in iframes to lower the risks of any external parties injecting stuff to our users. We also do it to make sure our content shows up before banners, to make the site feel quicker. We now have an external script running which we want to put in an iframe, but it does not have any visible content to go with it so I want to put css "visibility: hidden;" on the iframe. I read in a forum somewhere that search engines will lower the rank of a page, or even drop the page, if a iframe has "the minimal size of 1x1px". Will a search engine lower the rank of my page if I have a hidden (or 1px big) iframe?

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• Staying concentrated during small pauses [migrated]

  - by 9000

  My workflow includes some steps that make me wait for 0.5 to 2 minutes to complete: long remote git operations, creating / rebooting an instance in the cloud, etc. It's safe to assume that these operations cannot be made any faster. The resulting delays are the biggest flow-breakers for me. These are too long to just sit and stare at the progress indicators, but too short to take a walk and grab a coffee. Temptation to check some websites is big, and it's often a road to 20-30 minutes of procrastination + the time to get into the flow again. What are your coping strategies?

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• Is the use of explicit ' == true' comparison always bad? [closed]

  - by Slomojo

  Possible Duplicate: Make a big deal out of == true? I've been looking at a lot of code samples recently, and I keep noticing the use of... if( expression == true ) // do something... and... x = ( expression == true ) ? x : y; I've tended to always use... x = ( expression ) ? x : y; and... if( expression ) // do something... Where == true is implicit (and obvious?) Is this just a habit of mine, and I'm being picky about the explicit use of == true, or is it simply bad practice?

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• Sound from Ubuntu Server 10.04

  - by emilyk

  I feel like this should be a no brainer, but I just can't seem to figure it out. I am running Ubuntu Server 10.04 as a virtual machine in VMWare Fusion. I am simply trying to get there to be some sound that comes out of my laptop speakers. I have installed Alsa and MOC (followed these instructions, and it worked fine http://howto.blbosti.com/2010/03/ubuntu-server-install-alsa-sound-and-moc-music-on-console/). Especially using MOC, I can see that the song (an MP3) is playing, but I am not getting any sound out. lspci | grep audio gives me: 02:02.0 Multimedia audio controller: Ensoniq ES1371 [AudioPCI-97] (rev 02) This doesn't seem like it should be that big of a deal, but I just can't seem to make it work. Any ideas?

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• How to redesign the UI of a large project?

  - by jem88

  I'm currently working at a quite big Android project (a social network, you can see it here if is useful to answer the question). We decided to restyle the whole app, changing all the UI design. The code I actually have is complex, there are many controllers, and it's a little messy too. Is it "better" in terms of time and code cleanliness to take one controller per time, and rewrite it entirely, or to modify one controller per time? The layout change entirely anyway, so for that I know I've to restart from scratch. Maybe it could seem a stupid question, but with the "time" variable I really can't see the best way.

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• Multiple ( V- / I- ) Buffers, is it sane?

  - by Techie

  Currently I am developing an RTS game using XNA ( / ANX.Framework ). There is one thing bothers me. I am not sure in what way or how to organise Buffers. Should I use a new Vertexbuffer for any object ( e.g. a Char, a Table, an model ) or is it better to use ONE HUGE/ BIG Buffer to store any geometry in? I am still new to 3D Programming though I finished yet couple games using DirectX 9. Well, I hope this question qin't a duplicate and I appreciate any answer leading me into the right direction.

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• Windows Azure : le DevCamp 100 % en ligne aujourd'hui de 15h à 19h, des goodies à gagner et 30 jours d'essai gratuit à la plateforme

  Windows Azure : un DevCamp 100 % en ligne le 1er juillet De 15h à 19h, des goodies à gagner, 30 jours d'essai gratuit à Azure et une remise de 150 € pendant cet essaiMicrosoft organise un événement 100 % en ligne autour de Windows Azure le 1er juillet prochain.Ce « DevCamp » sur la plateforme Cloud pour les développeurs se déroulera de 15h à 19h (mais il sera bien sûr possible de la rejoindre à tout moment).Au total, ce sont 8 sessions de 30 minutes chacune qui aborderont des thèmes aussi variés que la BI en mode Cloud (avec SharePoint), la gestion d'identité dans Azure et Office365, l'administration d'une infrastructure Cloud hybride, le Big Data ou les Backend pour les applis multidevice.

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• Top X tips to code & debug efficiently [closed]

  - by user1510230

  I'm starting a big Java project and I wanted to have some advices that could benefit us all. What are the X (X could be 5 / 10 / ... or even 100 :) most important tips to code and debug efficiently in general (and in particular with java / javascript) ? I'll start with some basic ones : Use functions everytime a portion of code is used more than twice. Try not to code features with more than 15 lines of code in one shot. Rather write 5 lines of code then check if they work correctly then write 5 more... and so on start with the outcome of the function and then code it backwards (bottom-top approach) ... Thanks everybody

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• Removing "www." from domain name and SEO

  - by TecMan

  We are doing a big redesign work on our website, and at least 50% of the website folders will be moved to new places with different names (i.e. many URL will be changed). Sure, Google will need some time to index new pages and we expect our SERP positions will be not so good as they are now for some time. We also have an old idea to remove www from our domain name. It seems, it's the right time to do these two works together with publishing the website with updated contents. Or is it better from SEO perspective first publish the new contents, and only after some time, when our SERP positions will return to prior results, tell Google that the domain name without www is our preferred domain name?

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• Get exact time of each click - AdWords

  - by almo

  I have an AdWords campaign running and want to get a list with all clicks and the exact time the click occured. And I want to do this without having a tracking code on my homepage. So it needs to be via the API (AdWords/Analytics). You might think know that this is not possible. But big Bid Management tools (e.g. Kenshoo) know all details of every click and they don't have tracking code of my website (only on the success page of my contact form). How is that possible? The dimensions in AdWords only let me group the clicks at the hour level.

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• jQuery scrolling images for e-commerce site, what to do about users who disable JS

  - by Livingston Storm

  As the title suggests, I am developing an e-commerce site and I intend of having two jQuery plug ins on the default page, one for scrolling images and the other for the navigation menu. Should I be concerned about making the site work if the users disables JS? Cause if they have it disabled my site would be almost impossible to use with the scrolling images blocking the main content. Plus the CMS I am using, Big Commerce, uses a bit of JS for the products pages, which would also look ridiculous with JS disabled. Anyone have experience with this?

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• Why is it good not to rely on changing state?

  - by Slomojo

  This question arises out of the question Is Haskell worth learning? Generally a few often repeated statements are made, about how Haskell improves your coding skills in other languages, and furthermore, this is because Haskell is stateless, and that's a good thing. Why? I've seen someone compare this to only typing with the left hand, or perhaps closing your eyes for a day and just relying on touch. Surely there is more to it than that? Does it relate to hardware memory access, or something else which is a big performance gain?

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• Rewriting software using Agile methodologies

  - by Asier

  Suppose you have to rewrite an entire application using Agile methodologies, how would you do it? I guess you could write a big bunch of user stories based in the behavior of your current system. And then implement them in small iterations. But this wouldn't mean that we have the requirements UP FRONT?? Also, when would you start releasing? Agile says we should release early and often, but it doesn't make much sense to release before the complete rewrite has been completed. Anybody has used Agile before to rewrite software? How did you do it?

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• Should I try to write simple key-value storage by myself?

  - by shabunc

  I need a key-value storage in a simplest form we can think of. Keys should be some fixed-length strings, values should be some texts. This key-value storage should have an HTTP-backed API. That's basically it. As you can see, there is no big difference between such storage and some web application with some upload functionality. The thing is - it'll take few hours (including tests and coffee drinking) to write something like this. "Something like this" will be fully under my control and can be tuned on demand. Should I, in this specific case, not try to reinvent bicycles? Is it better to use some of existing NoSQL solutions. If yes, which one exactly? If, say, I'd needed something SQL-like, I won't ask and won't try to write something by myself. But with NoSQL I just don't know what is adequate and what is not.

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