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• How can robots beat CAPTCHAs?

  - by totymedli

  I have a website e-mail form. I use a custom CAPTCHA to prevent spam from robots. Despite this, I still get spam. Why? How do robots beat the CAPTCHA? Do they use some kind of advanced OCR or just get the solution from where it is stored? How can I prevent this? Should I change to another type of CAPTCHA? I am sure the e-mails are coming from the form, because it is sent from my email-sender that serves the form messages. Also the letter style is the same. For the record, I am using PHP + MySQL, but I'm not searching for a solution to this problem. I was interested in the general situation how the robots beat these technologies. I just told this situation as an example, so you can understand better what I'm asking about.

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• Is there a way to specify a CSS3 transition to occur only on :hover and when returning from hover, not on every event? [closed]

  - by Steve

  You could define the transition on the :hover event, which causes the browser to render only the effect into the hover and not out of it. a:hover { transition... } Using scale as an example, an image being scaled up would scale up on hover, but go straight back down without any transition when the cursor leaves the image. Or, you can set the transition on the element directly: a { transition... } Which by definition means any change that effects the scale of the element such as any developer set styles will work, but also the user zooming in and out the page, will cause there to be a transition. All the tutorials being spewed onto the internet at the moment point to using the latter, but wouldn't one consider this a usability flaw for anyone wanting to resize the page or taking any other action that may cause similar scenarios? Pages with large amounts of transitional hover scaling can go pretty mental if you zoom in and out of them.

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• Unable to start ubuntu

  - by Ray

  Need your help here: I'm unable to start Wbuntu in my laptop. I'm sharing ubuntu with Windows 7 in my laptop, and after I install Ubuntu when I boot my laptop and choose ubuntu as my operating system the following error appears: Windows failed to start. A recent hardware or software change might be the cause. To fix the problem: Insert your windows installation disc and restart your computer Choose your language settings, and then click "Next." Click "Repair your computer." If you do not have this disc, contact your system administrator or computer manufacturer for assistance. File: \ubuntu\winboot\wubildr.mbr Status: 0xc0000098 Info: The selected entry could not be loaded because the application is missing or corrupt. Any ideas?

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• Ubuntu Doesn't Start from USB After Installation

  - by Fred Venus

  My computer refuses to boot from the USB even after I change everything that I can possibly think of on my motherboard's BIOS. But I have booted from the USB twice in the past. The first time is when I first got the computer and needed to install a new operating system. The second time is when I installed Windows onto the whole hard drive and needed to reinstall Ubuntu. It seems that it only refuses to boot if there is already an existing installation of Ubuntu on the hard drive. Any ideas on what is going on?

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• How do i add a start menu page to my java game?

  - by user2149407

  I have a rather cool space invaders game that my friend and I have been working on for a while, and we have decided it needs an opening page, with "Start" options, "Quit" options and so forth. I have looked at several methods online, but cant seem to get any of them to work! Does anybody have any ideas? P.S Using JFrame to draw the main frame Im just looking to do this within Java, so just a panel that appears at a state change (GAME, MENU). Id like it to contain a few buttons to start the game, and quit. Later, I will add achievements, but im after something really basic for now. But thanks for the suggestions!

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• Error Setting Java Environment Variables

  - by Cherie Riesberg

  Problem:  Not exactly SharePoint, but the issue is when setting the %JAVA_HOME% environment variable, Java installs to the Program Files directory by default.  The space in the path seems to stop the variable from being read.  You get an error. Solution:  Change Program Files to Progra~1, so the path now looks like this: C:\Progra~1\Java\jdk1.6.0_23\bin\; You can type %JAVA_HOME%\bin\javac to test.  Output should look like this: Usage: javac <options> <source files> where possible options include: ...

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• Ubuntu One lost most of my files!

  - by Max

  I keep in my UbuntuOne the source code of my projects as a back up. In the past it worked and I never had problem. It happened that I had to change the hard disk of my laptop and I installed a fresh Ubuntu 12.10 in the new one. First time I connected with UbuntuOne it downloaded my files, but when I went to see my projects almost all my c++ source code files were missing!!!... I tried to check if I still have them on UbuntuOne by accessing from the web but nothing... my work is lost forever. I don't know who to ask for help? Is there a way to get back my precious files? Honestly I can't trust this service any more, I'm very disappointed. (edit: thanks God I found a back up in one of my external hard disks. I won't trust Ubuntu One any more, it's buggy and quite slow. )

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• Help with ubuntu 11 mis-displays

  - by Alfa9Dev

  So, I sea This tutorial, and I exectued this line in my terminal : sudo add-apt-repository ppa:lubuntu-desktop/ppa & sudo apt-get install lubuntu-desktop and my left-side panel changed abit, while the Dash Home changed to become like so : http://i43.tinypic.com/2vuc0lj.png ! help ! How can I change to the ubuntu default style or ppa ! because whene I run this : sudo add-apt-repository ppa:ubuntu-desktop/ppa it gives me the follwing notice : gpg: requesting key A1231595 from hkp server keyserver.ubuntu.com gpg: key A1231595: "Launchpad PPA for Ubuntu Desktop" not changed gpg: Total number processed: 1 gpg: unchanged: 1 does this mean that the ubuntu ppa isn't changed or what ?? Please, help any help would very appreciated :)

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• 12.04 monitor brightness commands ignored

  - by jarvisschultz

  I cannot change the brightness of the monitor on a laptop either from the command line or from keyboard shortcuts. I have verified that the file in /sys/class/backlight/acpi_video0/brightness is changing. I have also verified that I am running the nvidia drivers. Things I have tried: Adding entries to /etc/default/grub The GRUB_CMDLINE_LINUX_DEFAULT and GRUB_CMDLINE_LINUX entries now read GRUB_CMDLINE_LINUX_DEFAULT="quite nosplash acpi_backlight=vendor" GRUB_CMDLINE_LINUX="noapic" I have also tried various commands here (with an update grub and reboot each time) but nothing has helped I enabled brightness control in /etc/X11/xorg.conf so that it now looks like Section "Device" Identifier "Default Device" Driver "nvidia" Option "NoLogo" "True" Option "RegistryDwords" "EnableBrightnessControl=1" EndSection Investigated installing linux-kamal-mjgbacklight and determined it was not applicable to my system Nothing seems to have made any difference. I am using an Nvidia GeForce GT 330M with driver version 295.40. Does anyone have any other suggestions?

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• Wifi connection problems

  - by user12511

  I have Ubuntu 10.10 installed on a HP Pavilion DV2750ea. The wifi card is an Intel 4965AGN. When I first started using Ubuntu on this laptop it connected wirelessly to the network. Then it suddenly stopped. The Wifi card power light is off and all information says the card is disabled. When the laptop is powered on the wifi power light turns on and stays on until Ubuntu finishes loading. I have replaced the wifi card and the wifi switch module with no change. Please can you help.

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• FTP Changes file permisions

  - by AkBKukU

  I am trying to make changes to my website over ftp but when I save any files it changes the permissions and owner to my username. I can edit files in the same folder trough samba without changing the permissions. I really don't understand how the permissions for the /var/www folder work and I'm pulling my hair out trying to get it to work. I have recently made changes to the permissions of the /var/www directory (following this guide) so I could modify files in the www root. Right now I have the entire contents of /var/www set as -rwxrwxr-x 1 www-data www-data but when I change a file over ftp it becomes -rw------- 1 akbkuku akbkuku, akbkuku being my username. I am using vsftpd as the server, and I login with my normal user. How do I make it leave to permissions alone? At this point I'll even take a way yo reset all the permission back to stock and I'll just never modify files in the web root.

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• What would be a good way to request comments?

  - by WarpEnterprises

  In the project/team I'm working the frequency of comments is a little low. One reason might be that it is not clear to the long-time devs what lines in the code really needs a comment (each part of the project has quite fixed devs). To increase this we plan to let team members review the code and check in "requests for comments", which the main dev of that part should replace with useful comments. Do you think this could work? If "yes": what tags should we use to mark? (e.g. //TODO please comment) Can you think of alternatives for this process? Edit: I appreciate your answers about best practice in commenting and writing code, and I completey agree. But my question targets the cases where refactoring is not an option (not wanting to change working code, not wanting to "accuse" main dev of producing code that needs refactoring,...) - so only more or better comments are an option (at least for this question).

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• Is it necessary to memorize codes?

  - by AAA

  I am a new developer, who just got hired at a big company. I don't know how but I guess they are desperate. However, I am well-versed with HTML5/CSS3 though things change and new things are released and I keep up with as much as I can. But this job required me to hand-code Javascript, know Jquery and Ajax. I have been exposed to this a bit but I am not sure if I can hand-code Javascript. My question is, is it necessary to memorize all there is about Javascript or are there a few key things that I should know how to hand-code because looking at javascript code it seems there are lots of lines code! Please point me in the right direction.

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• Configuring ethernet network

  - by den-javamaniac

  Hi. I've got a wired network connection and if I'm using network manager (hereafter "NM") everything works fine except for the hardware address (it doesn't change). I'm thinking of using /etc/network/interfaces. So, I added some code and it looks like this: auto lo iface lo inet loopback auto eth1 iface eth1 inet static address #corresponding value netmask #corresponding value gateway #corresponding value hwaddress #corresponding value After restarting networking I get the following message: *Reconfiguring network interfaces... #here some help code appears Failed to bring up eth1. The default interface that works with NM is eth0. Please advise on how to handle the problem.

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• Web Content Writers Provide Value Beyond Words

  With a great deal of fanfare, Apple Computer recently released its iPad, assuring us that we would all become very familiar with this product and how it would change our lives for the better. As technology is difficult to keep up with these days, it's certainly true to say that we've heard this kind of claim before, but there does seem little doubt that one of the company's other products, the iPhone, will go down in history as having revolutionized the way that we communicate. Once again, we see how important the Internet is to us right now and how it is likely to gain additional traction.

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• C++ function returning pointer, why does this work ? [migrated]

  - by nashmaniac

  So heres a simple c++ function what it does it take an array of characters as its argument and a integer n and then creates a new character array with only n elements of the array. char * cutString(char * ch , int n){ char * p = new char[n]; int i ; for(i = 0 ; i < n ; i++) p[i] = ch[i]; while(i <= n ){ p[i++] = '\0'; } return p ; } this works just fine but if I change char * p = new char[n]; to char p[n]; I see funny characters what happens ? What difference does the former make also p is a temporary variable then how does the function returns it alright ?

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• the new distro ubuntu 12.10 has 2 system Bugs, reinstall the iso also exist [closed]

  - by sunpoison

  Possible Duplicate: How do I report a bug? discovered 2 bugs:: 1)cannot restart the computer when you click the top right icon power key "restart", it will stay on the splash image "ubuntu...",i wait for about 7 minutes and more, it also cannot restart, so, i have to uninstall the battery of the laptop...... 2)when i first update to the 12.10,not run for few hours, the "input method icon" on the top state bar is suddenly hide, when i use the shortcuts to switch the input method with "ctrl +space" it doesn' work at all, i restart the laptop, it can change the input method, but the state icon "a small keyboard icon is escape, i goto the "i bus" settings, but when i how to adjust it, the icon still can't display on the top bar (now i reinstall it use the iso file, this bug is fixed, but it cannot restart like the former one) it must has some problems of the "i bus" input method

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• Fonts have gone small for (almost) all users

  - by steevc

  We have four of us using the same PC with an account each. Recently noticed that the other 3 had smaller fonts than usual and the fonts for the log-in screen were smaller too. My account seems unaffected. I wonder if I might have done a manual change on my fonts at some point, but don't remember doing it. What would have changed this and where is it set? Still using Kubuntu 10.04. Just not got around to upgrading.

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• How do I batch rename a specific file inside multiple zip archives via the command line?

  - by user73469

  I have about 200+ shareware files in zip format that each contain a file called "FILE_ID.DIZ". I need to know how to rename each instance to lowercase "file_id.diz" without doing it manually - I've already gone that route and it's pretty time consuming. That file has to be lowercase because the BBS program I'm using ignores the FILE_ID.DIZ as a description since it is uppercase. If I manually change it to lowercase, the description is imported successfully. I know that rar has a renaming switch, but then I'd have to batch convert all of the zip files to rar, and then back to zip. I'm not ruling that out entirely, but it seems like the long way around to resolving this. I found the man page for "zip_rename", which looks like it might do the trick, but I have no idea how to actually implement it. I refuse to do this on a Windows machine - I just can't and won't do it... it's the principle ;). Anyway, thanks for your time!

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• Momentary freezes about every 60 seconds

  - by Barafu Albino

  I have just switched from OpenSuse to Ubuntu (the only reason is poor repositories - I got tired of installing everything from tar-balls). OpenSuse KDE worked flawlessly. Off-topic OS 7 does too. However, Ubuntu 13.04 after all updates keeps freezing about every minute. The time differs between occasions. It halts just for a fraction of a second, too quick to notice, but music crackles, and compressed video looses its tracks and covers with errors until a scenecut. I don't know what is responsible, the logs are clear. Tried to: change audio card, switched to Nvidia drivers and back, paused all unneeded daemons. Didn't help much. Any ideas where to look? I am experienced in Linux, just new in Ubuntu.

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• Best Way to Handle Meta Information in a SQL Database

  - by danielhanly.com

  I've got a database where I want to store user information and user_meta information. The reason behind setting it up in this way was because the user_meta side may change over time and I would like to do this without disrupting the master user table. If possible, I would like some advice on how to best set up this meta data table. I can either set it as below: +----+---------+----------+--------------------+ | id | user_id | key | value | +----+---------+----------+--------------------+ | 1 | 1 | email | [email protected] | | 2 | 1 | name | user name | | 3 | 1 | address | test address | ... Or, I can set it as below: +----+---------+--------------------+--------------------+--------------+ | id | user_id | email | name | address | +----+---------+--------------------+--------------------+--------------+ | 1 | 1 | [email protected] | user name | test address | Obviously, the top verison is more flexible, but the bottom version is space saving and perhaps more efficient, returning all the data as a single record. Which is the best way to go about this? Or, am I going about this completely wrong and there's another way I've not thought of?

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• Keeping application backend and UI synchronised

  - by Deanna

  Hi all. I have an app that works with a list of objects so has one central keyed list. The main window has a tree containing these object with some information, which is easy enough to populate as a one off event after loading. Now, the complicated part, any part of the application can add, remove, and more importantly change the details of those objects at any time (all in the same process) and I'd like the tree to update to suit. I have a few options including passing events back down from the object to the list to the form which seems to be the most flexible way. I can also do it lazily and repopulate the tree each time or periodically (very hackish). Does anyone have any better thoughts on how to structure this? This is being done in C# 2.0 but the concepts apply to any environment. Thanks

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• New Microsoft Office Coming with a Twist

  On May 12 Microsoft will unveil the newest version of its popular Office line with the 2 1 edition. New York s NBC Studios will be the location for the special launch and this time around Microsoft is changing things up a bit. Although the May 12 launch is mostly just for business customers who wish to buy the product Office 2 1 will be available on a wider scale for other customers sometime this June. As for the change Microsoft will be introducing a new Office Web Apps version as well in an effort to roll with the changing technological climate.... Autodesk - Civil 3D - Transportation Accelerate Projects with Integrated Data Sources & Automatic Documentation.

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• How should I design my website to allow posterity to edit?

  - by SSumner

  I'm building a website for a student organization I am involved in at my college. Most of the site will be static - i.e. won't change from year-to-year, but certain pieces will. I am high-tech, but most of the others aren't, and I am graduating in the spring. So how should I go about building the website so as to allow those that take over in subsequent years to edit information? Examples: Events: I already plan on using a Google calendar for this Officers: There will be profiles/pictures for all the officers on the web page Connections: Partnerships with other organizations that we have currently, but may not in future, or may add more in future Should I use some form of CMS (Content Management System)? If so, how restrictive are they (e.g. Drupal) to what you can build and then how easy is it to edit. What other ways could I make a very nice-looking website but allow certain pieces to be edited later?

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• Setting folder permission so it isn't deletable, but everything else is allowed

  - by user10324

  I want to set permissions to a folder such that, when I'm normally logged in (meaning not as root), this folder isn't deletable, but I can still change the name of this folder and move in around in my system ? IS this possible and if yes, how to set the permission ? I already tried different combinations for the permissions but couldn't figure out how to do it. Also (side question), if some folder hast some permission set and I copy this folder, along with its contents (assuming I am allowed to read it) to a memory, are these permission preserved ? I suppose not, since under Windows I could delete the folder on the stick, even if under Ubuntu it isn't allowed to delete it...

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