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• Touchpad not working on HP DV4 notebook

  - by Blaze

  the touchpad doesn't respond at all. i had to use an external usb mouse even to install ubuntu. I dont know the name of the manufacturer too. i am a newbie to ubuntu. i checked many related answers but they didnt help some are: sudo rmmod psmouse sudo modprobe psmouse proto=imps i used deconf editor_ in that it shows that touchpad is enabled but nothing haapens. i tried changing the setting 'disable while typing' that didn't work either. please help me. i really want to use ubuntu as i find it really good but without touchpad it would be pointless. literally.

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• Reading 'Index Status' graph in Google Webmaster tools

  - by sam

  I recently found a bunch of old files that had been ftp'ed to a live production server by mistake on a static (html / css / js) site. I manually deleted these files, but today when checking in Google Webmaster tools i found this graph below. The 'update' marker is from 3/9/14, what i can work out is what Google is trying to tell me, are they saying that : There was a ranking update like Penguin or Panda and they penalized my site and un-indexed a load of pages which they thought were junk.. OR Is this showing that I updated the site by deleting the files on the server on 3/9/14 OR Is this something else ?

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• Common Javascript mistakes that severely affect performance?

  - by melee

  At a recent UI/UX MeetUp that I attended, I gave some feedback on a website that used Javascript (jQuery) for its interaction and UI - it was fairly simple animations and manipulation, but the performance on a decent computer was horrific. It actually reminded me of a lot of sites/programs that I've seen with the same issue, where certain actions just absolutely destroy performance. It is mostly in (or at least more noticeable in) situations where Javascript is almost serving as a Flash replacement. This is in stark contrast to some of the webapps that I have used that have far more Javascript and functionality but run very smoothly (COGNOS by IBM is one I can think of off the top of my head). I'd love to know some of the common issues that aren't considered when developing JS that will kill the performance of the site.

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• How does one unit test an algorithm

  - by Asa Baylus

  I was recently working on a JS slideshow which rotates images using a weighted average algorithm. Thankfully, timgilbert has written a weighted list script which implements the exact algorithm I needed. However in his documentation he's noted under todos: "unit tests!". I'd like to know is how one goes about unit testing an algorithm. In the case of a weighted average how would you create a proof that the averages are accurate when there is the element of randomness? Code samples of similar would be very helpful to my understanding.

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• Which of VLC's dependencies causes sound device detection?

  - by Raphael

  I am setting up a headless music server based on the minimal Ubuntu image. After having installed the packages openssh-server,pulseaudio, libmad0,flac,liboff0,libid3tag0,libvorbis0a,ffmpeg, mpd,mpc,mpdscribble, paman,paprefs,pavumeter neither my internal soundcard nor the external DAC where detected by pulseaudio, that is pactl list did only list the dummy devices. Several reboots did not change that. The hardware devices are detected properly: ~$ lsusb | grep Texas Bus 002 Device 002: ID 08bb:2706 Texas Instruments Japan ~$ lspci | grep Audio 00:1b.0 Audio device: Intel Corporation N10/ICH 7 Family High Definition Audio Controller (rev 02) Following a hunch, I installed vlc with all dependencies. After a reboot, both devices are detected! ~$ pactl list | grep "Sink: alsa_output" Monitor of Sink: alsa_output.pci-0000_00_1b.0.analog-stereo Monitor of Sink: alsa_output.usb-Burr-Brown_from_TI_USB_Audio_DAC-00-DAC.analog-stereo Now I would like to remove VLC again but keep the devices. The question is: which of the many dependencies of VLC enables proper device detection? And why on earth is it not a dependency of pulseaudio?

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• Online Launch of 3 new Telerik products JustMock, TeamPulse and WebUI Test Studio

  As you probably already know we have introduced 3 new products in the last 10 days, two of them at DevConnections in Las Vegas alone. If you didnt get a chance to attend DevConnections, we have organized an online launch so you get to see our new products first hand. Here is the schedule: Introduction to Telerik JustMock Tuesday, April 20 @11am ET Join the online launch of JustMock - a new developer productivity tool from Telerik designed to make it easy to create unit tests. In this webinar you will find out what is in the current release and learn about JustMocks future. JustMock cuts your development time and helps you create better unit tests without requiring you to change your code. It allows you to perform fast and controlled tests that are independent of external dependencies like databases, web services, or proprietary code. With JustMock, there are ...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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• GPS feature big on mobile phones, oh yeah, they can make voice calls and text too

  - by hinkmond

  Here's a Web article stating the oh-so-obvious: One of the most useful things a cell phone can do is give you GPS location. See: Cell Phones Give Location Here's a quote: Now, majority of GPS receivers are built into mobile phones, with varying degrees of coverage and user accessibility. Commercial navigation software is available for most 21st century smartphones as well as some Java-enabled phones that allows them to use an internal or external GPS receiver. Wow. That's really big news. (face palm) Next thing we know, the Web site at stating-the-obvious.com, is going to tell us that the Internets will bring us news, sports, and entertainment right to our fingertips. Hinkmond

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• Sum of two Textbox values into third Textbox using JQuery

  - by Rajneesh Verma

  A script that sums up two textbox values using jQuery. **Note that I am not using any validation for textbox values. <html xmlns= "http://www.w3.org/1999/xhtml" > <head runat= "server" > <title></title> <script type= "text/javascript" src= "http://ajax.googleapis.com/ajax/libs/jquery/1.4.4/jquery.min.js" ></script> <script type= "text/javascript" > $(function () { var textBox1 = $( 'input:text[id$=TextBox1...(read more)

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• Link tracking: Amazon or Google way

  - by Howard

  When doing a shopping site, the best way is to reference some successful stores, like Amazon. In the area of link tracking, for example, to see which section of your frontpage yield better conversion: Amazon way: Generate an unique URL for each link in the frontpage, such as http://www.amazon.com/gp/product/B0083Q04IQ/ref=s9_pop_gw_g424_ir04/175-6575053-9292830?pf_rd_m=ATVPDKIKX0DER&pf_rd_s=center-2&pf_rd_r=0AMJCKBBQA63EP0XHB86&pf_rd_t=101&pf_rd_p=1263340922&pf_rd_i=507846 Google way Use Google Analytics <a href="/products/abc" onClick="javascript: pageTracker._trackPageview('/from-main-menu/products/abc');"> WHat are the pros and cons with the above two approaches (besides Google require JS support)?

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• Should you charge clients hours spent on the wrong track?

  - by Lea Verou

  I took up a small CSS challenge to solve for a client and I'm going to be paid on a hourly rate. I eventually solved it, it took 4 hours but I spent roughly 30% of the time in the wrong track, trying a CSS3 solution that only worked in recent browsers and finally discovering that no fallback is possible via JS (like I originally thought). Should I charge the client that 30%? More details: I didn't provide an estimate, I liked the challenge per se, so I started working on it before giving an estimate (but I have worked with him before, so I know he's not one of those people that have unrealistic expectations). At the very worst I will have spent 4 unpaid hours on an intriguing CSS challenge. And I will give the fairest possible estimate for both of us, since I will have already done the work. :)

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• Why is using C++ libraries is so complicated?

  - by Pius

  First of all, I want to note I love C++ and I'm one of those people who thinks it is easier to code in C++ than Java. Except for one tiny thing: libraries. In Java you can simply add some jar to the build path and you're done. In C++ you usually have to set multiple paths for the header files and the library itself. In some cases, you even have to use special build flags. I have mainly used Visual Studio, Code Blocks and no IDE at all. All 3 options do not differ much when talking about using external libraries. I wonder why was there made no simpler alternative for this? Like having a special .zip file that has everything you need in one place so the IDE can do all the work for you setting up the build flags. Is there any technical barrier for this?

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• Maximize, minimize and close buttons are either not present or not working in Lubuntu

  - by jimirings

  As the title indicates, the maximize, minimize, and close buttons are either not present or not working on my Lubuntu desktop. In fact, it only seems to be Google Chrome that displays the buttons at all, and only the close button works in Chrome, maximize and minimize don't do anything. When I use regular Ubuntu, they're all there just fine but not on Lubuntu. This all seemed to occur after I hooked my netbook up to an external monitor while using Lubuntu. Not sure if that had anything to do with it or not, but it seemed too big of a coincidence to not mention. Any ideas what the cause and a fix might be? Thanks in advance.

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• How to disable laptop internal keyboard

  - by Abhijit Navale

  I am using external usb keyboard. I want to disable laptop's internal keyboard using software. I know that i can just remove the internal keyboards wire and disconnect it physically, but i wanted to disable it using software so that later I can enable it by just executing a command in terminal easily. I am talking about disabling the keyboard and NOT the keyboard layout. I am having Hp-Compaq Presario A965 TU Laptop Intel Centrino Core 2 Duo(Freq. 2 GHz). I am using 64 bit Ubuntu Lucid Lynx.

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• How do I connect a Nexus 7 to transfer files?

  - by gotqn

  I want to move some files from my PC to Nexus 7. The tablet is connected to my PC's USB port and it is successfully charging. Unfortunately, the PC is not detecting the devices - what I expected is to be shown the Nexus 7 tablet as external devices (like my USB flash memory). As the tablet is connected to the my home internet network, I have checked if it will appear in the "Networks" section but it does not. I am using Ubuntu 12.4 LTS. Is there a easy way to connect the devices to my PC and move some information between them?

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• Complete Guide/Tutorials on LWJGL?

  - by user43353

  Dont get me wrong, I finished these tutorials on http://lwjgl.org/wiki/index.php?title=Main_Page. I finished The Basics section, OpenGL 3.2 and newer section, and I looked at the Example Code section. They were great tutorials, and I have looked at the external tutorials as well. I don't know where to go from here, and OpenGL is not my strong point. Some one suggested Learning Modern 3D Graphics Programming, and I didnt learn much. I looked at the port to LWJGL, but the book was on C and I couldn't really understand what the OpenGL meant. I am trying to learn 2D gaming, not 3D. Maybe later. Is there any tutorials that aren't C/C++ heavy and teach you 2D OpenGL?

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• Getting into C# and MVC4 coming from Javascript

  - by Stefan V.

  Let me know if this is the wrong place to ask this but, I am trying to get into a backend/server language coming from a front-end javascript background (vanilla, angular, jQuery and a bit of node and mongodb, also some experience with PHP and MySQL). Why C#? My company's entire server-side is MVC4. Occasionally, I am going through commits of the backend guys and have asked them all sorts of questions. A lot of what I have heard and seen just seems appealing. Anyway, I'd rather start with C# first and gradually adopt .NET MVC. Does anybody advice, tips, recommended books, etc for somebody trying to learn C# coming from a JS background?

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• Samsung 305u notebook touchpad not working in Ubuntu 13.10

  - by Pablo Viollier

  I just installed Ubuntu 13.10 on my Samsung 305u notebook. The problem is that the touchpad (cursor and clicking) doesn't work, it does nothing. The only way to fix it is to plug an external mouse, which isn't the optimal. I already checked the system preferences and the touchpad is enabled. I used Ubuntu 13.04 before, and it worked. Then I installed Linux Mint and the touchpad stopped working, that's way I installed 13.10, but now it doesn't work here either. I hope someone can help me.

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• Using a particular font in a commercial game

  - by RCIX

  I'm working on a game I intend to sell, and I want to use this font. The license says: "You may NOT copy or distribute the font outside of the licensed household, company, school or institution. Please ask external contacts who want to use the font to purchase their own license at www.CheapProFonts.com." However, my plans are to use a tool to output a texture using this font to use as a bitmap font in my game. Does this mean I can do so, and sell my game with the font in it?

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• Inspecting the model in a Rails application

  - by Matt Sherman

  I am learning some Ruby on Rails, and am a newbie. Most of my background is in ASP.net MVC on the back end. As I play with a basic scaffold project, I wonder about this case: you jump into an established Rails project and want to get to know the model. Based on what I have seen so far (again, simple scaffold), the properties for a given class are not immediately revealed. I don't see property accessors on the model classes. I do understand that this is because of the dynamic nature of Ruby and such things are not necessary or even perhaps desirable. Convention over code, I get that. (Am familiar with dynamic concepts, mostly via JS.) But if I am somewhere off in a view, and want to quickly know whether the (eg) Person object has a MiddleName property, how would I find that out? I don't have to go into the migrations, do I?

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• Google's Opinion on Javascript Page Refresh

  - by user35306

  I was wondering if anyone knows Google's view on this. My company has a homepage that features a lot of 3rd parties on it and it needs to inform customers which ones are currently online, which aren't, and which are currently busy. Because this constantly changes, we have the homepage refresh to show the most relevant and up-to-date content to our users. I'm not using a meta refresh element in the http-equiv parameter to do this. Instead I have this js element to refresh the page: window.setTimeout("refreshPage()", 120000); I just want to know whether people think Google might consider this a violation of the content guidelines or not. Or if it's not an outright violation, then at least if Google frowns on this or not. It doesn't redirect the user to a different page or anything, just refreshes the page so that they can see the most relevant content.

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• DDD and validation of aggregate root

  - by Mik378

  Suppose an aggregate root : MailConfiguration (wrapping an AddressPart object). The AddressPart object is a simple immutable value object with some fields like senderAdress, recipentAddress (to make example simple). As being an invariant object, AddressPart should logically wrap its own Validator (by the way of external a kind of AddressValidator for respecting Single Responsibility Principle) I read some articles that claimed an aggregateRoot must validate its 'children'. However, if we follow this principle, one could create an AddressPart with an uncohesive/invalid state. What are your opinion? Should I move the collaborator AddressValidator(used in constructor so in order to validate immediately the cohesion of an AddressPart) from AddressPart and assign it to aggregateRoot (MailConfiguration) ?

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• Organazing ASP.Net Single Page Application with Nancy

  - by OnesimusUnbound

  As a personal project, I'm creating a single page, asp.net web application using Nancy to provide RESTful services to the single page. Due to the complexity of the single page, particularly the JavaScripts used, I've think creating a dedicated project for the client side of web development and another for service side will organize and simplify the development. solution | +-- web / client side (single html page, js, css) | - contains asp.net project, and nancy library | to host the modules in application ptoject folder | +-- application / service (nancy modules, bootstrap for other layer) | . . . and other layers (three teir, domain driven, etc) . Is this a good way of organizing a complex single page application? Am I over-engineering the web app, incurring too much complexity?

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• Disable outbound links without letting others know that

  - by tadoman

  Is there a way I can tell google not to follow external links ( pointing to other sites) without letting other know. I know you can disable outbound links by putting rel=nofollow or something in robots.txt. But that's something others can see as well. I'm just wondering if there's a way to tell google not to follow those links without letting others know that... like a setting in webmaster tools or something similar ( there's definetly one way. I could set an exception in my conf file for my server to check the user agent to be "googlebot" and then serve a different version of robots.txt. So that when a different user would check that link it would return a different robots.txt thant the one served to googlebot. However I'm not too sure google would be too happy about this) Thank you

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• Volume setting isn't remembered after restart/shutdown

  - by Iulian

  This is my first time here and I'm new to linux and also to Ubuntu. I've installed first version 11.10 and there was some problems with the unity dock and also the problem with the volume not being remembered after restart or shutdown. I'm using dualboot with Windows 7. Ubuntu was installed after windows. I have 2 sound cards. One is onboard, on the motherboard, and the other is external, an E-MU 0404 USB 2.0 sound card. The last one is my primary sound card and I've choosed it as default output sound card. I've upgraded to 12.04 hopeing that this was fiex but even in this version the OS doesn't keep the volume where it was last time. The big problem is that sometimes I forget about this problem and start music and it starts at full volume and soon I think I will die of heart attack. Is there a way to make it remember or at least to tell him to start at a specific volume not at 100%?

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• Asked to make a 2d platformer [on hold]

  - by Fendorio

  I've been tasked with creating a simple 2D platformer top be put on a webpage. The game is pretty much a simple Super Mario type game. I've been playing around with C# and C++ now for a couple years, so I'm aware that Unity offers a route to making a web game but for such a simplistic project i'm afraid that using unity would be overkill... i.e. slow, nobody wants to install the web player for a game with < 5 mins playtime. Html5 canvas/JS seems to jump out at me over flash, as that seems to be being pushed out. Any suggestions on a route to take would be greatly appreciated

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