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• Touchpad stopped working on an Acer AspireOne D255E

  - by Gustavo

  I have a less than a year old Acer AspireOne D255E with a fresh install of Ubuntu 11.10. Everything has been working fine. Great OS and great netbook. But today the touchpad stopped working. It had been working fine. I closed the netbook and when I opened it again, a couple of hours later, I could not move the pointer with the touchpad. I can not get the pointer to move. I cleaned the touchpad surface well, just in case. Everything else is working fine. All the software updates are up-to-date. I have rebooted several times with no solution. I have attached an USB mouse and the pointer works well. What can I do to troubleshoot the problem? I have gone to the System Settings, touchpad section, and there is not much that I can do there. I would like to determine first if it is a hardware or software issue and then how to resolve it. Is there a way that I can reinstall the touchpad drivers. just in case it is a software problem? I have been using Ubuntu for nearly a year now and am very happy with it. Are there any wise Ubuntu gurus out there who can help me? Thank you for reading this note.

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• Is it recommended to use more than one language at a startup?

  - by GoofyBall

  I work for a mobile startup where, for historical reasons, our chosen language was C#. I was recently assigned to a small project to build a tool that would be used by us internally. When I explained my intention to use Python to build this tool I was heavily criticized for this because introducing new languages, and technologies (Debian, Apache, Python and Django) into our ecosystem would make it harder for other developers to maintain (because only two other people know more than one language besides C#). I countered that this project would take far longer to develop in C# (which I think is an inherent problem with the language/.NET framework) and that the project was small and designed to solve a very particular problem. Of course it is necessary that the ecosystem be as a homogeneous as possible but if your are developing tooling, infrastructure, and internal systems when there are better things to build them with than C# then you should consider using them. By using one language you exclude a lot of other great libraries and frameworks out there, and this case it was the difference between taking one week to build in Python as opposed to a month in C#. Do you think it is acceptable to understand and use only only one language at a startup or even a larger company? Am I perhaps being naive??

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• both IPV4 and IPV6 at the same time over DSL connection?

  - by namiheike

  Let me describe my situation: while I connect computer with the wire, I've got an IPV6 address automatically, there's a "Wired connection" tab in network manager, and I can access an website that support IPV6 (google,facebook,twitter...)with a hosts file, or use the proxy like google.com.sixxs.org But if I want to access the whole internet, I have to create a DSL connection with username and password that ISP gave me. BUT after I change my connection into this DSL connection, I cannot access website over IPV6, even there's the site's ipv6 address in /etc/hosts, then I realize that I lose my IPV6 connection, because the ping6 says connect: Network is unreachable. the problem is, there's no IPV6 tab or options about IPV6 in the configure of DSL connection. It feels like I can only use one connection at the same time, but the DSL doesn't support IPV6 and the wired connection doesn't support IPV4(I mean, there's no way to input the password the ISP gave me) maybe make somebody uncomfortable, but when I work in MS windows, there's no such problem, (maybe just feel like) I can access V4 and V6 at the same time. So how to solve with this? thanks a lot. I'm in 11.10 + gnome3

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• Dual Boot Installing Ubuntu 12.04 with Windows 7 (64) on a non UEFI system

  - by Randnum

  I cannot seem to install the correct boot loader for a non-UEFI firmware system. I'm trying to install Ubuntu 12.04 and Windows 7 (64) which are technically compatible with GPT but for windows only if the firmware is UEFI enabled. My system uses the old BIOS system and does not support UEFI. Therefore, whenever I finish my Ubuntu install and try to install Windows I get a "cannot install to GPT partition type" error. Even if I use Gparted to format a special NTFS file format for windows it can't handle the GPT partition style because it doesn't have UEFI. But my ubuntu install always forces GPT during installation and never asks if I want to install the old BIOS style MBR instead. How do I resolve this? Both OS's will install fine on their own the problem is when I try to install the second OS it doesn't recognize any of the other's partitions and tries to rewrite it's own on top of the other. I've tried both OS's first and always run into the same problem. Since there is no way to make Windows recognize GPT without upgrading my Motherboard how do I tell Ubuntu to use the old BIOS MBR on install? Do I have to download a special Ubuntu with a specific grub version? or should I manaually configure my partition somehow to force it not to use GPT? Thank you,

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• NVIDIA Graphics - resolution problems with new 12.04 LTS installation

  - by Daveisuser56810

  I've been trying to install Ubuntu 12.04 LTS on my desktop most of the day. The desktop uses a NVIDIA GEFORCE 9800 (GT I think) graphics card. I am unable to set the correct resolution (1680 x 1050) for the display. The first problem I had was that of the "Black Screen" during install. I overcame this by utilising the "nomodeset" switch on the install options (once I'd found how to do that). The second problem of course was the "Black screen" following the first reboot. Once again this was overcome by using "nomodeset", this time by "editing" the GRUB. This gave me a resolution of 1280x768 which, the Displays GUI allowed me to change to 1280x720 (appears to fit on screen). I then tried to install the NVIDIA drivers. 1) using additional drivers 2) manually by downloading driver and installing in root As soon as NVIDIA drivers are installed - resolution become restricted to 640x480 (max). At this resolution Ubuntu GUI is not usable as most screens are larger than the display. Removing the NVIDIA driver and removing the XORG.CONF file does not lift this restriction. I have tried most things that I have found and that were vaguely intelligible, but nothing appears to get me closer to a resolution of 1680x1050. UPDATE: reinstalled Ubuntu 12-04 and used the "NoModeSet" in the Grub to restore the resolution to 1280x720, which is at least usable. Will live with this for now.

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• How do I install 10.04 on a Vortex86DX embdedded system?

  - by mathematician1975

  I am trying to install Ubuntu on a Netcom NC-499 board that contains a Vortex86DX processor. The processor vendor claims support for Ubuntu 10.04 but I am having problems installing it. I am trying to install to a 8GB compact flash card attached to the board with an IDE connector, using a USB connection CD-Rom drive and a burned ISO image obtained from this link http://old-releases.ubuntu.com/releases/10.04.0/ubuntu-10.04.3-desktop-i386.iso . Installation proceeds up to the point of around 78% but during the stage where the installer informs me that it is "configuring apt", the installer terminates with a popup dialog containing the following "The installer encountered an unrecoverable error. A desktop session will now be run so that you may investigate the problem or try installing again." I have no idea what to do at this point. I am a Linux novice and I do not really know how to investigate the problems with the installation. I have configured the BIOS exactly according to how the vendor specifies and they assure me that this version is fully compatible with their hardware and yet I am unable to get a decent install. I am able to install Ubuntu 8.04 using exactly the same procedure successfully so I am sure there is no problem with my CD-Rom compatibility or the compact flash drive. Any help will be gratefully received.

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• solve a partition misalignment?

  - by learner

  I have a new Dell XPS laptop which had Windows 7 installed in it. It also had a default extra partition for "Dell Utility". I installed Ubuntu in it on an Extended Partition along with windows and specified the logical partitions myself (for /,/home and swap). Now when I open Disk Utility , it shows this "Partition misaligned by 512 bytes" error for the Dell Utility partition and "Partition misaligned by 1024 bytes" for the entire Extended partition where Ubuntu is installed. Deleting the extended partition and re-installing Ubuntu may solve the problem of misalignment in the extended partition. But how about the Dell Utility partition? If I re-install Windows 7 Dell Utility wouldn't be a part of the re-install. So that may not solve it either. How do I fix this? Note: The extended partition I made contains an NTFS logical partition for holding data accessible by both OSes(basically a personal data partition). EDIT: I deleted all my Ubuntu partitions and re-installed Ubuntu like before,this time making them partitions with GParted via LiveCD. Now the only problem is that there is a misalignment in the Dell Utility partition. The other misalignment got fixed. Now how do I get rid of that issue?

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• Recovering from an incorrectly deployed robots.txt?

  - by Doug T.

  We accidentally deployed a robots.txt from our development site that disallowed all crawling. This has caused traffic to dip dramatically, and google results to report: A description for this result is not available because of this site's robots.txt – learn more. We've since corrected the robots.txt about a 1.5 weeks ago, and you can see our robots.txt here. However, search results still report the same robots.txt message. The same appears to be true for Bing. We've taken the following action: Submitted site to be recrawled through google webmaster tools Submitted a site map to google (basically doing everything possible to say "Hey we're here! and we're crawlable!") Indeed a lot of crawl activity seems to be happening lately, but still no description is crawled. I noticed this question where the problem was specific to a 303 redirect back to a disallowed path. We are 301 redirecting to /blog, but crawling is allowed here. This redirect is due to a site redesign, wordpress paths for posts such as /2012/02/12/yadda yadda have been moved to /blog/2012/02/12. We 301 redirect to wordpress for /blog to keep our google juice. However, the sitemap we submitted might have /blog URLs. I'm not sure how much this matters. We clearly want to preserve google juice for URLs linked to us from before our redesign with the /2012/02/... URLs. So perhaps this has prevented some content from getting recrawled? How can we get all of our content, with links pointed to our site from pre-and-post redesign reporting descriptions? How can we resolve this problem and get our search traffic back to where it used to be?

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• Cannot get temperatures in Dell Studio 1558

  - by Athul Iddya

  I could never get proper temperatures on my Dell Studio 1558. lm-sensors and acpi give wrong readings. The output of sensors is, $ sensors acpitz-virtual-0 Adapter: Virtual device temp1: +26.8°C (crit = +100.0°C) temp2: +0.0°C (crit = +100.0°C) acpi -V gives me, $ acpi -V Battery 0: Full, 100% Battery 0: design capacity 414 mAh, last full capacity 369 mAh = 89% Adapter 0: on-line Thermal 0: ok, 0.0 degrees C Thermal 0: trip point 0 switches to mode critical at temperature 100.0 degrees C Thermal 0: trip point 1 switches to mode passive at temperature 95.0 degrees C Thermal 0: trip point 2 switches to mode active at temperature 71.0 degrees C Thermal 0: trip point 3 switches to mode active at temperature 55.0 degrees C Thermal 1: ok, 26.8 degrees C Thermal 1: trip point 0 switches to mode critical at temperature 100.0 degrees C Thermal 1: trip point 1 switches to mode active at temperature 71.0 degrees C Thermal 1: trip point 2 switches to mode active at temperature 55.0 degrees C Cooling 0: LCD 0 of 15 Cooling 1: Processor 0 of 10 Cooling 2: Processor 0 of 10 Cooling 3: Processor 0 of 10 Cooling 4: Processor 0 of 10 Cooling 5: Fan 0 of 1 Cooling 6: Fan 0 of 1 I suspect even hddtemp gives bogus readings as its always at 46 $ sudo hddtemp /dev/sda /dev/sda: ST9500420AS: 46°C I have gone through some bug reports and some used to have the same problem after resuming from suspend. But I always have this problem. I had updated to the latest BIOS from Windows a couple of weeks ago, will updating from Ubuntu change anything? CORRECTION: hddtemp's readings do change. Its now at 45.

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• Input/output error, when trying to install on netbook [closed]

  - by Ben

  Been trying to install ubuntu on my Samsung NB30 netbook, but I have been running into the same error over and over again. [Errno 5] Input/output error This particular error is often due to a faulty CD/DVD disk or drive, or a faulty hard disk. It may help to clean the CD/DVD, to burn the CD/DVD at a lower speed, to clean the CD/DVD drive lens (cleaning kits are often available from electronics suppliers), to check whether the hard disk is old and in need of replacement, or to move the system to a cooler environment. I'm installing from the USB bootable version, I get the exact same error at the exact same point when trying to install both ubuntu desktop and ubuntu desktop remix. I've tried redownloading both ISOs twice and I've tried two different USB sticks (one being completely new). I've tried installing from with in an ubuntu live session and I get the exact same problem. I've ran a bootable memtest and everything passes with no errors, I've also ran a dmesg in terminal after the installer fails here's what it reported - http://bit.ly/exAQRR Thanks in advance! EDIT: I know this was ages ago, but to anyone out there with the same issue, the problem turned out to be the downloaded image, my internet is poor at the best of times and the ISO failed the MD5sum check, if this happens to you I recommend you download the ISO image by torrent, it'll check the integrity of the file is maintained.

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• Ubuntu stops using Nvidia driver after kernel upgrade

  - by Daniel

  Just updated and restarted, Ubuntu's doesn't display correctly. After restart, the desktop now looks like this. I've temporarily switched to the Nouveau driver. The update history reveals the kernel was updated, amongst many things; and the following were installed: linux-image-3.5.0-19-generic (3.5.0-19.30) linux-image-extra-3.5.0-19-generic (3.5.0-19.30) I've encountered this type of problem quite recently, so I decided to reapply the same steps, to solve the problem, as follows: sudo apt-get install linux-headers-3.5.0-19 sudo apt-get install linux-headers-3.5.0-19-generic sudo depmod -a sudo modprobe nvidia sudo /etc/init.d/*dm restart When installing linux-headers-3.5.0-19-generic, I get an error, message from terminal as follows: Setting up linux-headers-3.5.0-19-generic (3.5.0-19.30) ... Examining /etc/kernel/header_postinst.d. run-parts: executing /etc/kernel/header_postinst.d/dkms 3.5.0-19-generic /boot/vmlinuz-3.5.0-19-generic Error! Problems with depmod detected. Automatically uninstalling this module. DKMS: Install Failed (depmod problems). Module rolled back to built state. However, I ignored the above error and continued the steps with sudo depmod -a, installed nvidia-current, then did sudo modprobe nvidia, which yielded the following error: FATAL: Error inserting nvidia_current (/lib/modules/3.5.0-19-generic/updates/dkms/nvidia_current.ko): No such device Upon restart, the Nvidia driver now works! BTW, do those error messages imply I broke something? Just curious, cause I don't want to get happy I've fixed it, then it stops working later on. The system is Dell XPS-L702X, with NVIDIA GeForce GT 555M, and 17" screen.

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• How to really master ASP.NET MVC?

  - by user1620696

  Some years ago I've worked with web development just using PHP without focus on object orientation and so on. When I knew a little bit about it, and the benefits it brings, I've started moving to ASP.NET MVC. First, I've studied C# in the book Visual C# Step by Step. I've found it a good book for a beginner, and I could learn a lot of this new language with it. Now, when I've came to study ASP.NET MVC, I hadn't so much luck. I've studied on some books that explained MVC well and so on, but then started just saying: "do that, and now that, and then that", and I feel I couldn't really master ASP.NET MVC. I feel this, because when I was reading, I knew how to do the things the book taught, like implementing DI with Ninject and so on, but some time later, without looking at it for some time, I couldn't do it by myself. What I'm trying to say, is that usually I don't know where to start, how to do things in this framework and so on. How can I really master ASP.NET MVC? There is some book, some tutorial series, anything, that can really help with that? I'm pretty happy with the .NET framework, my problem isn't it, my only problem is working with the MVC framework, and applying the techniques from object orientation there. I don't know if this question is on-topic here, but I'm really just looking for some good references, to become better with this framework.

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• Using a permutation table for simplex noise without storing it

  - by J. C. Leitão

  Generating Simplex noise requires a permutation table for randomisation (e.g. see this question or this example). In some applications, we need to persist the state of the permutation table. This can be done by creating the table, e.g. using def permutation_table(seed): table_size = 2**10 # arbitrary for this question l = range(1, table_size + 1) random.seed(seed) # ensures the same shuffle for a given seed random.shuffle(l) return l + l # see shared link why l + l; is a detail and storing it. Can we avoid storing the full table by generating the required elements every time they are required? Specifically, currently I store the table and call it using table[i] (table is a list). Can I avoid storing it by having a function that computes the element i, e.g. get_table_element(seed, i). I'm aware that cryptography already solved this problem using block cyphers, however, I found it too complex to go deep and implement a block cypher. Does anyone knows a simple implementation of a block cypher to this problem?

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• Why can't I install 10.04 on a system that already has 8.04?

  - by Android Eve

  Ubuntu 10.04 is beautiful. I love it. I am dying to install it on my PC, alongside the existing Ubuntu 8.04 (from which I write this message right now). But... it won't let me! When I reach the partitioning stage (manual!) Ubuntu 10.04 sees my two HDDs as one RAID volume. It doesn't see all the partitions I already have in place in /dev/sda and /dev/sdb. Even Windows 7 doesn't behave like this... (yes, I actually managed to install Windows 7 64-bit in dual-boot configuration with Ubuntu 8.04 on this same system). Note: GParted on Ubuntu 10.04 (live CD) sees the partition intended for Ubuntu 10.04 (/dev/sda4) perfectly, but is unable to format it. Note: I also removed that partition trying to reformat it via GParted once 10.04 LiveCD is loaded. It didn't help. I believe that the problem lies in Ubuntu "deciding for me" that the HDDs should be "seen" as a RAID, hence any partition is seen by GParted as "busy" or "locked". Any idea how to solve this problem?

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• Track sales and commission with third-party tool

  - by Andrew

  I have a clothing website where I link to various clothing retailers. I have reached an agreement with one of the retailers whereby they will pay a commission to us for every sale they make from traffic that was referred by our site. I need a mechanism for tracking how much commission should be paid to us, that involves as little work as possible to implement from their side. We both have Google Analytics. Option 1: They record a goal in their GA account whenever someone makes a purchase on their site. They see how many completed goals are marked as referral traffic from our site and calculate commission accordingly. The problem with this is that the whole process of calculating and paying commission will be manual. They will need to frequently check how many sales were generated by referral traffic from our site, and probably we will have to chase them for commission payments. Also - since we won't have access to their GA data - we will need to trust that they report all sales accurately. Option 2: Sign them up to an affiliate network like Commission Junction or Google's Affiliate Network, and connect to them through this network. The problem with this solution is that it seems too heavyweight; ideally we don't want to ask a retailer to go through the whole sign up process just to deal with us and pay us commission. I am assuming that there must be some lightweight service that tracks the number of sales by one site and pays commission accordingly to the other site, where the sign up and installation procedure is simple and fast.

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• When running a .jar application with OpenJDK, my keyboard becomes unresponsive?

  - by Mochan

  I recently downloaded a Java application with the .jar format, and had it running on my computer not so long ago. Now that I'm using my desktop instead of laptop temporarily, I want it to run. On my laptop it was a tremendous hassle to get OpenJDK to even run the application without it going black, and now on my desktop I don't have that problem. However, when I run the application, my keyboard becomes unresponsive and doesn't type at all. This is a really big problem because it's demands the use of a keyboard. It works as normal on my laptop though, and it works perfectly. But now on the desktop its completely useless. I don't know if there's like a keyboard driver I'm missing, but there shouldn't be because the keyboard runs flawlessly everywhere else. I'm using OpenJDK 6 because the 7 has the same 'black screen' I mentioned, so I need this to work within OpenJDK 6. Thanks so much in advance and I'll try to specify as many details as I can. M

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• Remove languages in translations?

  - by Pit

  Hi, I use spell-checker for 4 languages, en, de, fr, and lb. If I enable Spellchecking and writing aids for en, de or fr in System -> Administration -> Language Support there will be multiple versions of each language available, e.g. en , en_CA, en_GB, ... Is there a possibility to select only one of those language versions while enabling the language, or removing the others afterwards. It would be enough to remove them from the selection menu. I would like to use the version which is equal to the country the language originally comes from: e.g. de_DE, fr_FR, en_GB. For lb there is currently only lb_LU so there is no problem (yet). Instead of 4 languages I currently have around 20, which is kind of annoying when switching the language ( which I do quite often). There might be a similar problem for the menu translations, where if I understand correctly you can choose the order in which translations are applied if they exist. Any suggestions?

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• Added resolution not working after upgrading to 12.04

  - by David

  After upgrading, my screen resolution (added by xrandr comands on the start) did not work like before. Messages appear showing some errors (that i have never had in 11.10). "No se pudo aplicar la configuración almacenada para los monitores"/"Can't apply the stored configuration for the monitors." This script didn't work either. xrandr --newmode "1280x1024_60.00" 109.00 1280 1368 1496 1712 1024 1027 1034 1063 -hsync +vsync xrandr --addmode VGA1 1280x1024_60.00 xrandr --output VGA1 --mode 1280x1024_60.00 I also tryed deleting monitors.xml but, nothing. This only erase the window message. It's been sayd that ##It's a normal buggy and well know problem for Pc's with Intel integrated video cards.## The new version of gnome-settings-daemon stores its configuration information in dconf rather than gconf. I tryed something, but the problem persist. This is what i did. Install the dconf-tools package, and then run dconf-editor. In the tree on the left, navigate org - gnome - settings-daemon - plugins - xrandr. Uncheck the active checkbox. restart your XServer (Ctrl+Alt+Backspace) (It didn't worked out for me, but it may be helpful to someone)

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• How to scroll hex tiles?

  - by Chris Evans

  I don't seem to be able to find an answer to this one. I have a map of hex tiles. I wish to implement scrolling. Code at present: drawTilemap = function() { actualX = Math.floor(viewportX / hexWidth); actualY = Math.floor(viewportY / hexHeight); offsetX = -(viewportX - (actualX * hexWidth)); offsetY = -(viewportY - (actualY * hexHeight)); for(i = 0; i < (10); i++) { for(j = 0; j < 10; j++) { if(i % 2 == 0) { x = (hexOffsetX * i) + offsetX; y = j * sourceHeight; } else { x = (hexOffsetX * i) + offsetX; y = hexOffsetY + (j * sourceHeight); } var tileselected = mapone[actualX + i][j]; drawTile(x, y, tileselected); } } } The code I've written so far only handles X movement. It doesn't yet work the way it should do. If you look at my example on jsfiddle.net below you will see that when moving to the right, when you get to the next hex tile along, there is a problem with the X position and calculations that have taken place. It seems it is a simple bit of maths that is missing. Unfortunately I've been unable to find an example that includes scrolling yet. http://jsfiddle.net/hd87E/1/ Make sure there is no horizontal scroll bar then trying moving right using the - right arrow on the keyboard. You will see the problem as you reach the end of the first tile. Apologies for the horrid code, I'm learning! Cheers

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• How to know why my cd is not booting?

  - by Tom Brito

  I have downloaded Ubuntu 10.10 and burned the ISO but it will not boot. I discarded problems with the ISO, as I've downloaded from the official website with no errors, and burned it with no errors. I discarded problems with the burning, as looks like it was recorded with no errors here and later in another computer. I discarded problems with my DVD reader as other cds boots fine. I'm currently using Ubuntu 9.10, I know I can upgrade via internet, but I have this same problem with my Windows XP cd, so I really would like to discover what's going on here.. My Ubuntu 9.10 cd boots just right, but the new one not. What else can be? Or what more precise tests can I make to discover where's the problem? --More info What happens when I try to boot with the Ubuntu 10.10 cd is that it behavior like there's no bootable cd in the drive. It just don't find the boot on the cd, and start the HD system. My notebook is an Amazon PC Intel Celeron 1.5 with 2Gb memory, a DVD-RW driver, HD samsung with 260GB.

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• Remove unwanted Mount option from Places Menu

  - by Jack

  On Ubuntu 10.10, I added a CIFS network share into /etc/fstab using /media/pub as my mount point. The share becomes visible on the Desktop and under Places (drive icon), which is what I want. But the problem is, Ubuntu 10.10 (unlike 10.04) creates another entry under Places with same name "pub", except this appears to be a mount shortcut rather than another link to the share. When I move my mouse over it says "Mount pub" and if I click on it, it will mount the share and again each time (if already mounted) - it does not display contents of share. In either case, an error pops up soon after "Unable to mount pub - Timeout waiting for mount to appear". The share itself is accessible, but I can't unmount via GUI, system reports its mounted multiple times and I have to unmount via terminal. (sudo umount -a) As I'm mounting the share at boot time, I don't need this manual option under Places. Is there an easy way to stop Ubuntu from listing it under Places? I have tried making the mount point under /mnt, this fixes the problem, except creates another as it removes the drive icon from Desktop and Places. I could create a bookmark, but just wondered if there's an easy fix to this unwanted entry under Places. Thanks

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• Dual monitors with one above the other?

  - by Felix

  I'm using Gnome 3 and proprietary Nvidia drivers. I have tried to set in nvidia-settings my external monitor to be "above" my main one (it's a laptop). However, when I try to drag a window up from the main display to the external one, it gets stuck and can't move past a certain point. Trying to maximize it changes its decoration so it looks maximized (i.e. no borders, etc), but its size or position doesn't change. Now, if I set my external monitor to be "to the left" of the main one, it works, which is why I'm suspecting this is a Gnome issue, not an Nvidia one. Anyone know how to fix this? Update: some versions: Gnome: 3.2.2.1 Nvidia: 280.13 Update 2: I can see that Gnome 3.4 is out, and among the release notes is better external monitor support. However, they only mention a small fix that is unrelated to my problem. Can anyone with Gnome 3.4 and access to an external monitor please test this out and tell me if it works? I don't want to go through the hassle of upgrading my Ubuntu installation unless I know for certain it's going to fix the problem.

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• What are some Java patterns well-suited for fast, algorithmic coding?

  - by Casey Chu

  I'm in college, and I've recently started competing in programming competitions with my friends. These competitions involve solving algorithmic problems quickly. It's a lot of fun, but there's one problem: I'm forced to use Java. (My teammates use Java.) Background: I'm a self-taught JavaScript programmer, and it hurts to write Java code. I find it very verbose and inflexible, and I feel slowed down when having to declare types and decide which of the eighty list data structure to use. I'm also frustrated about the lack of functional programming features and how verbose using regular expressions, arrays, and dictionaries are. As an example, consider the problem of finding the length of the longest string of consecutive characters in a given string. So the string XX22BBBBccXX222 would give 4, for the string of four Bs. In Java, I'd have to loop through and manually count characters and manually keep track of the maximum. (That's at least as far as I'm aware -- I'm not as familiar with Java as I am with JavaScript.) In JavaScript, I'd find it like this: var max = Math.max.apply(Math, str.match(/(.)\1*/g).map(function (s) { return s.length; })); Much quicker and simpler, in my book. The question: what are some Java features, techniques, or patterns well-suited for fast, algorithmic coding?

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• Wordpress blog penalized by Google search - what's wrong?

  - by pawelbrodzinski

  I have a blog (http://blog.brodzinski.com), which is wordpress.org blog with pretty popular Thesis theme with almost no other customizations. Some time ago it was penalized by Google search - it simply stopped appearing in search results even for search terms it used to be top result, like my name - Pawel Brodzinski - which isn't anything close to popular search term. To be exact the site has been penalized on Nov 18. It started popping up in search result on Dec 23 but only for a few days. Since Dec 27 it is out again. I know Google guidelines and I'm not aware to break any of them. I submitted reconsideration request after I noticed penalty. It was proceeded and there was no change whatsoever (no surprise as it seems the site was penalized again). I checked diagnostics in webmaster tools and neither any malware was detected nor any strange search terms popped up. I read related threads on Google webmasters forum but found none of solutions working for me. I posted a thread on Google webmasters forum (http://www.google.com/support/forum/p/Webmasters/thread?tid=546339f49d4a03bc&hl=en) and the only answer I got was to check for duplicate content. Well, there is some duplicate content published on the web but it is true for vast majority of blogs and it doesn't seem to be a reason for a penalty. Also before Dec 27 I was able to remove duplicate content from a couple of sites which were republishing my feed but this doesn't change the situation - the site was penalized again. The problem is I have no idea what can be wrong with the website or how to find it out. To make the problem worse I'm no webmaster, I just run a wordpress blog, which supposed to be easy.

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• Every file on cPanel got deleted (then restored hours later), and I have no idea why

  - by mcranston18

  I apologize in advance if I don't provide proper detail; I am new to server stuff and am looking for general advice about this issue: I was helping out a client doing web design last month. They have about a dozen static sites on one server. The sites are all built on Joomla, except one which I built on Wordpress. Everything was working fine last month when we did the redesign but all of a sudden this morning, every single file on their server got deleted: every web page, file, and all e-mail addresses. I phoned the hosting company (alliancewww.com) to ask, "why did every single file suddenly delete off the server?" They said, "because someone must have deleted it." I said, "well no one did." (Which I'm pretty damn sure no one did.) They said, "you can pay us to look into the problem." I authorized $150 for them to look into the problem. About an hour later, everything was magically re-instated. The host said they had a back-up of everything and just restored everything. What I'm wondering: Does anyone have recommendations of logs I can go through to investigate how the files got deleted in the first place? I've checked out their cPanel logs but found nothing. Is it likely that this is a mess-up on the host's part?

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