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• How can I improve these online java programming puzzles I wrote for my (middle/high school) students?

  - by Arcymag

  I'm teaching some middle and high school students programming right now, and I found that some of them really liked online programming puzzles. So I created http://www.kapparate.com/coder/ , and right now there's 4 categories of puzzles. All the puzzles are set up right now so that variables are pre-initialized, and the user plugs in some code in the middle. For example, the problem might say these are pre-initialized: int x = ????; int y = ????; int z; and then the program might ask the student to write the final line of code: z = x + y;. Now I know I could go a long way in improving the usability of this site (like having an area that lists the pre-defined variables), but I was wondering if this concept seems sound. I know some sites have kids fill in functions, but not all of my students know what functions are yet, and I'm trying to introduce online programming puzzles before that.

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• How to populate a form list with buttons using javascript

  - by StealingMana

  I made a script that, when you press one button(accessories) the selection(mylist) populates with one array(accessoryData), and when you hit the other button(weapons) the other array(weaponData) populates the selection. However, in the current state of the code the second button press is not re-populating the selection. What is wrong here? Also if there is a more efficient way to do this, that might be helpful. Full code function runList(form, test) { var html = ""; var x; dataType(test); while (x < dataType.length) { html += "<option>" + dataType[x]; x++; } document.getElementById("mylist").innerHTML = html; }

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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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• Is it unusual for a small company (15 developers) not to use managed source/version control?

  - by LordScree

  It's not really a technical question, but there are several other questions here about source control and best practice. The company I work for (which will remain anonymous) uses a network share to host its source code and released code. It's the responsibility of the developer or manager to manually move source code to the correct folder depending on whether it's been released and what version it is and stuff. We have various spreadsheets dotted around where we record file names and versions and what's changed, and some teams also put details of different versions at the top of each file. Each team (2-3 teams) seems to do this differently within the company. As you can imagine, it's an organised mess - organised, because the "right people" know where their stuff is, but a mess because it's all different and it relies on people remembering what to do at any one time. One good thing is that everything is backed up on a nightly basis and kept indefinitely, so if mistakes are made, snapshots can be recovered. I've been trying to push for some kind of managed source control for a while, but I can't seem to get enough support for it within the company. My main arguments are: We're currently vulnerable; at any point someone could forget to do one of the many release actions we have to do, which could mean whole versions are not stored correctly. It could take hours or even days to piece a version back together if necessary We're developing new features along with bug fixes, and often have to delay the release of one or the other because some work has not been completed yet. We also have to force customers to take versions that include new features even if they just want a bug fix, because there's only really one version we're all working on We're experiencing problems with Visual Studio because multiple developers are using the same projects at the same time (not the same files, but it's still causing problems) There are only 15 developers, but we all do stuff differently; wouldn't it be better to have a standard company-wide approach we all have to follow? My questions are: Is it normal for a group of this size not to have source control? I have so far been given only vague reasons for not having source control - what reasons would you suggest could be valid for not implementing source control, given the information above? Are there any more reasons for source control that I could add to my arsenal? I'm asking mainly to get a feel for why I have had so much resistance, so please answer honestly. I'll give the answer to the person I believe has taken the most balanced approach and has answered all three questions. Thanks in advance

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• FxCop ... Where have you been all my life?

  - by PhilSando

  I was recently introduced to microsoft's tool that analyzes managed code assemblies called FxCop. It points out possible design, localization, performance, and security improvements against a pre defined set of rules (and also accepts custom rules). At first I was unsure how to go about using it as it seems to be aimed at software developers (.exe and .dll) . Its easy to get around this with the following steps: 1)Create a new folder (i.e C:\Code Analysis) 2)Publish your web application into the new folder 3)Open FxCop and add all the dll files from the newly created bin folder  to be scrutinized. Lots more info / docs available here on msdn and you can also download fxcop free

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• Customizing Gnome Shell in 11.10

  - by gentmatt

  Since Unity on my old MBP is not that snappy, I really want to change my GUI to Gnome Shell. However, I've really been struggeling with the customization of Gnome Shell. Can you help me with the following: Is is possible to have the dock on the screen all the time? Can I enable 'hot corners' for features like 'scaling' in compiz? Is there a ccsm-like GUI configuration tool? Can I enable wobbly windows in Gnome Shell? How do I change the shortcut for the WIN-KEY to start this 'Gnome-Mission-Control' (by that I mean this thing u see when going to the top left corner). Thank you.

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• Developing web sites that imitate desktop apps. How to fight that paradigm? [closed]

  - by user1598390

  Supposse there's a company where web sites/apps are designed to resemble desktop apps. They struggle to add: Splash screens Drop-down menus Tab-pages Pages that don't grow downward with content, context is inside scrollable area so page is of a fixed size, as if resembling the one-screen limitation of desktop apps. Modal windows, pop-ups, etc. Tree views Absolutely no access to content unless you login-first, even with non-sensitive content. After splash screen desapears, you are presented with a login screen. No links - just simulated buttons. Fixed page-size. Cannot open a linked in other tab Print button that prints directly ( not showing printable page so the user can't print via the browser's print command ) Progress bars for loading content even when the browser indicates it with its own animation Fonts and color amulate a desktop app made with Visual Basic, PowerBuilder etc. Every app seems almost as if were made in Visual Basic. They reject this elements: Breadcrumbs Good old underlined links Generated/dynamic navigation, usage-based suggestions Ability to open links in multiple tabs Pagination Printable pages Ability to produce a URL you can save or share that links to an item, like when you send someone the link to an especific StackExchange question. The only URL is the main one. Back button To achieve this, tons of javascript code is needed. Lots and lots of Javascript and Ajax code for things not related with the business but with the necessity to hide/show that button, refresh this listbox, grey-out that label, etc. The coplexity generated by forcing one paradigm into another means most lines of code are dedicated to maintain the illusion of a desktop app. What is the best way to change this mindset, and make them embrace the web, and start producing modern, web apps instead of desktop imitations ? EDIT: These sites are intranet sites. Users hate these apps. They constantly whine about them, but they have to use them to do their daily work. These sites are in-house solutions, the end-users have no choice but to use them. They are a "captive audience". Also, substitution will not happen because of high costs. But at least if that mindset is changed, new developments would be more web-like.

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• Why Skype doesn't work in Quantal

  - by Lionthinker

  Since updating to Quantal Skype doesn't work and I get this error when updating: W:GPG error: http://ppa.launchpad.net quantal Release: The following signatures couldn't be verified because the public key is not available: NO_PUBKEY F6A071ABEE5D5BA2 W:Failed to fetch http://archive.canonical.com/commercial-ppa-uploaders/skype/ubuntu/dists/quantal/main/source/Sources 404 Not Found [IP: 91.189.92.191 80] W:Failed to fetch http://archive.canonical.com/commercial-ppa-uploaders/skype/ubuntu/dists/quantal/main/binary-amd64/Packages 404 Not Found [IP: 91.189.92.191 80] W:Failed to fetch http://archive.canonical.com/commercial-ppa-uploaders/skype/ubuntu/dists/quantal/main/binary-i386/Packages 404 Not Found [IP: 91.189.92.191 80] E:Some index files failed to download. They have been ignored, or old ones used instead.

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• Switching Workspace in Xubuntu Oneiric is slow, how to improve it?

  - by photoao

  The processor is a single core AMD Sempron 1.6 GHz. While it is a few years old, workspace switching under Ubuntu Lucid / Gnome to ANY workspace was always instant, even when a lot of apps were open. Under Xubuntu Oneiric, switching to an empty workspace is instant, but switching to a workspace with 5 open applications takes 8 to 9 seconds. Compiz is not installed. Since XFCE is said to be more light weight than Gnome, switching should be instant too, isn't it ? How can this be improved ?

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• calling methods if previous call success

  - by New Developer

  I my c# program I have to perform 5 steps(tasks) sequentially. basically these five should execute one after the other only the previous task performed is success. Currently I have done it in following style. But this is not very good code style to follow. var isSuccess=false; isSuccess=a.method1(); if(isSuccess) isSuccess=a.method2(); if(isSuccess) isSuccess=a.method3(); if(isSuccess) isSuccess=a.method4(); if(isSuccess) isSuccess=a.method5(); How can I re factor this code. What is the best way I can follow?

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• Running the application with F5 gives a message saying "\bin\Debug\Infrastructure.Layout.dll was not found"

  The problem here is the ProfileCatalog.xml file refers to the old assesmbly namesdlls. It does not get updated when the assembly names change. Steps to fix this issue: 1. Open the ProfileCatalog.xml file in the Shell project, and you'll find there are three ModuleInfo configuration items that need to have the solution name prefixed. 2. Prefix the dlls with the solution name. Recompile and everything will work fine. span.fullpost {display:none;}

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• New Window Via JavaScript Clears Parent

  - by Bunch

  This is not a new item at all but I came across it recently. For an app I had been using some JavaScript like: javascript:window.open(someurl.aspx here) to open a new window via a button. That bit of code had been working great in several other apps. Then in one app that same code decided to open the new window correctly while clearing the parent of everything but [object]. The fix ended up being simple, change the javascript to: javascript:void(window.open(someurl.aspx here); Then it worked like I thought it should. Tags: ASP.Net, JavaScript

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• Efficient Bus Loading

  - by System Down

  This is something I did for a bus travel company a long time ago, and I was never happy with the results. I was thinking about that old project recently and thought I'd revisit that problem. Problem: Bus travel company has several buses with different passenger capacities (e.g. 15 50-passenger buses, 25 30-passenger buses ... etc). They specialized in offering transportation to very large groups (300+ passengers per group). Since each group needs to travel together they needed to manage their fleet efficiently to reduce waste. For instance, 88 passengers are better served by three 30-passenger buses (2 empty seats) than by two 50-passenger buses (12 empty seats). Another example, 75 passengers would be better served by one 50-passenger bus and one 30-passenger bus, a mix of types. What's a good algorithm to do this?

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• Nifty gui hide/show image

  - by Mario

  I have a simple screen made with Nifty gui. On this game screen I want to put a simple image controls sound: just on and not. So I have two images to switch and get music stop or run. Problem is: how can I hide/disply an image with nifty gui? Here my java code when player click on image: Screen screen = nifty.getCurrentScreen(); Element el = screen.findElementByName("iconOn"); el.setVisible(false); el = screen.findElementByName("iconOff"); el.setVisible(true); This code doesn't work :( Thanks to everyone could help me

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• Update Manager Not working

  - by Deena

  Hi When I try to press CHECK Button in Updated, it is not looking for updates available. getting below error. "Failed to Download repository information" Check your Internet connection.. W:GPG error: http://archive.canonical.com oneiric Release: The following signatures were invalid: BADSIG 40976EAF437D05B5 Ubuntu Archive Automatic Signing Key <[email protected]> W:GPG error: http://archive.canonical.com lucid Release: The following signatures were invalid: BADSIG 40976EAF437D05B5 Ubuntu Archive Automatic Signing Key <[email protected]> W:Failed to fetch gzip:/var/lib/apt/lists/partial/archive.ubuntu.com_ubuntu_dists_oneiric_main_source_Sources Hash Sum mismatch E:Some index files failed to download. They have been ignored, or old ones used instead. Ubuntu Version 11.10

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• Remove drive partitions before Installing 12.04?

  - by newbie

  I have an old box and want to switch to Ubuntu 12.04. It has two hard drives. The first is a 40 gig disk that runs Windows XP; the other is 80 gigs partitioned into 40, 20, and 20 gigs. I am prepared to abandon Windows altogether and everything stored on the drives. So my question is, do I just install from CD/DVD onto the C drive? Or onto one of the partitions in the other disk first and then uninstall Windows? What will happen to the partitions on the second disk, which I don't particularly see a need for? Thanks in advance for any advice.

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• HealthCare.Gov Fiasco

  - by jchang

  There will probably be consequences for delving into such a charged topic. But this has never stopped me before and I am too old to change my ways. So here goes. Many of us have of the problems with the online HealthCare.gov even though technical details are not yet available. First let me say that I am not singling out this particular project, as severe problems are common in government IT projects, and I suspect the incidence rate may be no different in private industry. Whereas other projects...(read more)

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• Google lance Tag Manager, un outil gratuit qui facilite la gestion du suivi et des balises de marketing des sites Web

  Google lance Tag Manager un outil gratuit qui facilite la gestion du suivi et des balises de marketing des sites Web Google vient d'annoncer le lancement de Google Tag Manager, son nouvel outil pour la gestion des différentes balises dans un site Web. Pour mieux monétiser leur site Web et contrôler la manière dont le contenu est utilisé, les gestionnaires de sites ont recours à des outils de suivi de statistiques comme Google Analytics. Pour chaque service, un morceau de code doit être intégré dans chaque page du site. Bien que d'une utilisation relativement simple, la multiplication de ces bouts de code sur une page peut rendre leur gestion fastidieuse. De plus, les requêtes entr...

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• Failed Vista/Ubuntu 12.04 attempt at dual boot. Can only boot Ubuntu now

  - by mathematician1975

  I recently tried installing Ubuntu 12.04 alongside my Windows Vista install. I can boot fine into Ubuntu every time, but now every time I choose to boot into Windows, the process fails completely and restarts (or shuts down) my laptop. Is there anything I can do to recover this. I am very happy with Ubuntu and I do not want to recover my old Vista installation to overwrite it, but I do need to be able to use both OS's. Is it recoverable or should I start from scratch?

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• How can I derive force vectors from velocity vectors?

  - by PixelRouter

  I'm making a 2d shooter ala Geometry Wars. I've got my own simple physics at work driving the background grid and all my entities. To move anything in the world I apply a Vector2d force to it. The 'engine' calculates the resulting acceleration and therefore the velocity. I am trying to port some code I found which implements the classic 'Boids' flocking algorithm, but the code I have works by calculating the Boids' velocities directly, so If i use it as is, it bypasses my physics engine. How I can translate the velocity vectors into force vectors that I can apply to the Boids and which will result in the proper velocities via my physics engine.

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• What significant lost steps forward in side tracks should be revived in the main stream of software?

  - by C.W.Holeman II

  In reading Alan Kay's question on Significant new inventions I was coming up with answers that were not new ideas but old ones that have been passed by in the main stream. So, what significant lost steps forward that happened in a side track should be revived in the main stream of software? These would be ideas that worked well in their context but a different context appeared and became dominant the context, even though it lacked the idea. It maybe that in the new dominant context one just cannot do something or it requires great effort to be exerted.

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• How do you usually manage callbacks in Java using Swing library?

  - by none

  I'm quite new to the Java Swing programming, and GUI development as well. As a beginner, I'm currently reading Design Pattern, but finding what I'm looking for is quite hard, most of the times. So far, I've never had huge problems defining a view hierarchy - I just use to subclass component from component. But the hard-to-do here is how managing callbacks, which often become hard to maintain due to the hard code. During my last projects, I tried to separate GUI, Listener and Callbacker objects which cooperated together, but in this way it was really hard adding new features. So, which kind of best patterns or best practices do you tend to use when trying to maintain, add new features or even worst avoid to hard-code classes which manage callbacks method in this kind of frameworks (mainly Java Swing)?

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• Application didnt upgraded after upgrading ubuntu to 13.10

  - by Gaurav Dighe

  I upgraded my laptop from ubuntu 13.04 to 13.10. Its working like a charm. But I doubt if software-center, file manager, vlc, etc upgraded. Still I am not getting the new versions of softwares in software-center. I am not able to see any new features in file managers as was noted on many blogs. VLC still showing the old version 2.0.8. Its being said that its upgraded to VLC 2.1 or just a dist-upgrade would do the job. But it didn't. Also I need to know the default applications (with version) provided by ubuntu 13.10 Kindly help.

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• VB6 general search form

  - by SilentRage47

  I'm working on an old vb6/access2003 app which is used to handle orders, bills of materials and that sort of things. I'm thinking about creating a form that I call every time the users needs to search for something. This should work like these: Click on the field to complete, let's say name of a buyer Open new form, search for the client and click on it Return the name of the buyer to the previous form (probably the header of the order) So, I would need to pass to the new form something that identify the type of search I have to do (so what access table to open) and return some values. Is my idea correct or there something better? I would like to use only one form for all the searches, now the app works with a lot of msflexgrid for every form.

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• How to upgrade to R 3.0.1 in Raring Ringtail?

  - by ACD

  I need to install the new version of R to get around the 2^31 object size limit. Its not clear how to do so. I see that there is a user-contributed PPA here. But I'm not sure exactly how to install it -- I would add the PPA, then do sudo apt-get install R-base? Do I need to manually remove the old version? How do I make sure that the new version of R plays well with Rgedit, which I use as an editor? I see many packages built for the PPA, but I don't see ALL of them, and in particular it is missing many that I use. Can I upgrade without creating problems along the lines of the worries described above? How do I do it?

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