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• Please help restore my crashed launcher/compizconfig

  - by Will

  I have just upgraded from 11.04 to 11.10. Everything worked fine at first, but at one point when I was editing some CompizConfig settings (just something basic like 'number of desktops'), CompizConfig crashed. Then the whole launcher disappeared, along with most of the buttons in the top panel. The shutdown button, calendar, etc. all went, leaving just the tabs from File to Help. Also, windows now have the title and File, Edit..(etc) tabs on 2 separate lines, instead of the new format where hovering over the bar switches which one is visible. I have since been using Ctrl+Alt+T to open a terminal and open applications, shut down, etc, from there. I have typed in the command: unity --reset which has some effect, but the terminal never reaches the end of the task. I've also done apt-get update, which completed fine. Can anyone help me restore the launcher and panel functions?? I am getting most frustrated by the fact that once I have opened Firefox, I can't enter any other commands!

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• Programming languages with a Lisp-like syntax extension mechanism

  - by Giorgio

  I have only a limited knowledge of Lisp (trying to learn a bit in my free time) but as far as I understand Lisp macros allow to introduce new language constructs and syntax by describing them in Lisp itself. This means that a new construct can be added as a library, without changing the Lisp compiler / interpreter. This approach is very different from that of other programming languages. E.g., if I wanted to extend Pascal with a new kind of loop or some particular idiom I would have to extend the syntax and semantics of the language and then implement that new feature in the compiler. Are there other programming languages outside the Lisp family (i.e. apart from Common Lisp, Scheme, Clojure (?), Racket (?), etc) that offer a similar possibility to extend the language within the language itself? EDIT Please, avoid extended discussion and be specific in your answers. Instead of a long list of programming languages that can be extended in some way or another, I would like to understand from a conceptual point of view what is specific to Lisp macros as an extension mechanism, and which non-Lisp programming languages offer some concept that is close to them.

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• How to add a new developer to the team

  - by lortabac

  I run a small company composed of only 2 developers. For one of our clients we are building a very big application, whose development has gone on for 1.5 years. Now this client has found an important sponsorship, and they are organizing some events related to this project, so we have a deadline in 2 months and we can't miss it. We are thinking of adding a new developer to the team, and I am wondering what we can do to help his integration. This is the situation: We are approaching the threshhold of Brooks's law, the point when adding new developers will be counter-productive. The application is relatively well designed, but the implementation is chaotic in some points (especially older code). There are unit tests only for more recent code. When this project started, we didn't have the habit of doing tests. Documentation and comments are incomplete. The application is both large and complex. The client has written down almost every detail about his project, in a very clear and "programmer-friendly" way. Is it a good idea to add a person now? If so, what can we do in order to help the new developer integrate into the team?

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• How do I set up different configurations on an Ubuntu laptop based on different physical locations?

  - by Andrew Larned

  I'm looking for a way to have a couple (or three) multiple configurations set up on my laptop, and easily switch between them. To be more specific, when my laptop is at work, it's plugged into a second monitor, and has a specific set of networks configurations. At home, the second monitor is gone, the network configurations are different. At a public wireless point there are other configurations to set, etc. I know I can go into my preferences and turn on/turn off the monitor, and mess with the networking preferences, and so on, but I'm looking for a way to change a bunch of preferences all at once, and if it's possible to do that automatically, maybe based on the wireless APs in the vicinity, that would be even better.

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• AutoMatically Creating New Sites When New Users Sign Up

  - by Eddy Freeman

  I would like to know how hosted eCommerce sites like www.shopify.com, www.3dCart.com etc.. automatically creates new sites when new users sign up. What kind of tools do they use to create those sites into the users profile. I have tried googling but couldn't find an answer. Does any of you guys have any knowledge or experience that you can share with me? Or do you know a tutorial that you can point me to? I hope my question is clear. Thanks for your help.

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• SCCM for mobile device management returns 404 on /devicemgmt/server.resource

  - by Dan

  We have a new Windows Server 2008 R2 machine onto which we have installed SCCM SP2 followed by the R2 package. We have enabled a mobile device management point and enabled distribution points to support mobile devices as per http://technet.microsoft.com/en-us/library/bb680634.aspx We have also installed the Mobile Device Management Client on to a Windows Mobile 6.1 device. The client on the device fails to connect to the server. Our investigation so far has led us to the URL /devicemgmt/server.resource. However, looking in IIS on the server shows no such URL (in fact nothing apart from the aspnet_client directory) and visiting the URL with a browser returns 404. WebDav is enabled on the Default Web Site in IIS. BITS is installed on the server. Can anyone confirm whether enabling mobile device management will add visible directories to IIS and if so why it might be failing in our case?

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• What are the options for retraining formally as a software engineer?

  - by Matt Harrison

  I'm a self-taught programmer. I have a good undergraduate degree in Architecture (building, not software). I was always a science/maths kid and got consistency good grades in these subjects. However I became indecisive at undergraduate level and switched between Physics, Chemistry, Art and finally stuck with Architecture mainly out of the desperate need to finish any degree. As soon as I graduated, I ditched architecture and started writing code again professionally. I've been a programmer now for 3 years and I've progressed very quickly. I'm ambitious and I want to work for the top companies in this field at some point and I've realised I need a Computer Science education to be taken seriously (based on job ads for the big tech firms). I've applied for a few MSc programs in Computer Science but they've all rejected me because of my BA. It's just not an option for me to quit my job and go back and do another 3 year undergraduate degree in CS. I know I can study at this level because I've read most of the books on the reading lists for CS courses in the UK that I can find and I have this knowledge now, it's just I can't prove it on an application form. What options are available to me?

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• Why doesn't this script work?

  - by Devin

  I've been using this bash script: for i in $(ls); do mv $i a$i; done to prepend all filenames in a folder with the letter a. I'm afraid that at some point I'll accidentally use this script in the wrong directory and prepend a ton of filenames that I don't want prepended. So I decided to explicitly cite the path to the file. So now my script looks like this: for i in $(ls /cygdrive/c/Users/path/to/Images); do mv /cygdrive/c/Users/path/to/Images/$i /cygdrive/c/Users/path/to/Images/a$i; done It does prepend the filename with the letter a, but it also appends the filename with this ? symbol. Any ideas why it would do that? If it helps any, I'm using cygwin on a Windows 7 box. Thanks for the help!

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• Attempting to caue packet loss with netem doesn't work - possibly because of NAT (but delay does work)

  - by tomdee

  I have traffic from a WIFI access point routed via an Ubuntu box. I have two network interfaces which are NATed *filter :INPUT ACCEPT [11:690] :FORWARD ACCEPT [0:0] :OUTPUT ACCEPT [37:6224] -A FORWARD -s 192.168.2.0/24 -i eth1 -o eth0 -m conntrack --ctstate NEW -j ACCEPT -A FORWARD -m conntrack --ctstate RELATED,ESTABLISHED -j ACCEPT COMMIT # Completed on Thu Mar 15 13:37:21 2012 # Generated by iptables-save v1.4.10 on Thu Mar 15 13:37:21 2012 *nat :PREROUTING ACCEPT [0:0] :INPUT ACCEPT [0:0] :OUTPUT ACCEPT [0:0] :POSTROUTING ACCEPT [0:0] -A POSTROUTING -j MASQUERADE COMMIT If I run a ping app on an Android device connected to the WIFI network I can happily ping google. If I use netem to introduce some delay tc qdisc change dev eth0 root netem delay 100ms I can clearly see pings taking longer. If I use netem to introduce some packet loss tc qdisc change dev ifb0 root netem loss 50% then I see no change. Packet loss does work fine for locally generated traffic, just not for traffic coming in over the network that's being NATed. Any ideas how to sort this out?

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• Ubuntu 13.04 alongside Windows 8 - How to partition from Windows

  - by mengelkoch

  I plan to install Ubuntu 13.04 alongside Windows 8, and I'm looking for a CLEAR answer on how to conduct partitioning appropriately. I'm very new to all of this so a thorough explanation with minimal jargon would be great. I have an Acer Aspire M5 x64 with 6G RAM. I think I already figured out how to deal with the fast startup, UEFI and SecureBoot issues (I disabled fast startup and disabled Secure Boot). I am able to boot into Ubuntu from a LiveUSB, and I think I am ready to install Ubuntu. Note - despite some advice found here, I do have to disable SecureBoot to boot 13.04 from my LiveUSB. From what I have read here, it seems that I should (at least at first) create the partitions from WITHIN Windows 8, not from the LiveUSB, to avoid reported problems. I have run compmgmt.msc and I see the existing partitions. I see the following: Disk 0: 400 MB Recovery; 300 MB EFI System; Acer (C:) 444.95 GB (Boot, Page File, Crash Dump, Primary Partition); 20 GB Recovery Disk 1: 3.74 GB Primary Partition; 14.90 GB Primary Partition I gather I need to create a mounting point '/' Partition (??), a swap partition, and a home partition. Please explain what these are, how big they should be, how I create them from Windows Disk Management, and anything else I need to know. Eventually, I plan to fully replace Windows 8 with Ubuntu, but for now I want to run alongside Windows 8 and not screw things up. I don't have any critical files saved on this computer yet. Thanks.

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• Get 100 highest numbers from an infinite list

  - by Sachin Shanbhag

  One of my friend was asked this interview question - "There is a constant flow of numbers coming in from some infinite list of numbers out of which you need to maintain a datastructure as to return the top 100 highest numbers at any given point of time. Assume all the numbers are whole numbers only." This is simple, you need to keep a sorted list in descending order and keep a track on lowest number in that list. If new number obtained is greater than that lowest number then you have to remove that lowest number and insert the new number in sorted list as required. Then question was extended - "Can you make sure that the Order for insertion should be O(1)? Is it possible?" As far as I knew, even if you add a new number to list and sort it again using any sort algorithm, it would by best be O(logn) for quicksort (I think). So my friend told it was not possible. But he was not convinced, he asked to maintain any other data structure rather than a list. I thought of balanced Binary tree, but even there you will not get the insertion with order of 1. So the same question I have too now. Wanted to know if there is any such data structure which can do insertion in Order of 1 for above problem or it is not possible at all.

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• How do you have one IP address and many websites?

  - by johnny

  Hi, How can I have it where I have one IP address that sits on the Internet but many web names? For example, when a hosting company has a shared IP but I get unlimited domain names (along with everyone else on that box). I have a box on the Internet but I want to point to another machine that holds a different website when someone types in the different www...(it's sitting right next to it in just a different box). Is that all subdomaining? Thank you. EDIT: I am the hosting company.

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• How to INF mod: Replacing 32bit dlls with 64bits

  - by Nime Cloud

  I've got a driver setup for 32 bit: An INF file and an x86 folder with two 32 bit dlls. I need to replace these 32 bit dll files with 64 bit ones. I just simply overwrite 32 bit files but no lock. How can I make 64 bit version of the driver? Update: I tried original setup files on 32 bit Windows XP, setup asks for WdfCoinstaller01009.dll, I just simply browse & point the file from somewhere on XP. ;-------------- WDF Coinstaller installation [DestinationDirs] CoInstaller_CopyFiles = 11 [silabser.Dev.NT.CoInstallers] AddReg=CoInstaller_AddReg CopyFiles=CoInstaller_CopyFiles [CoInstaller_CopyFiles] WdfCoinstaller01009.dll [SourceDisksFiles] WdfCoinstaller01009.dll=1 [CoInstaller_AddReg] HKR,,CoInstallers32,0x00010000, "WdfCoinstaller01009.dll,WdfCoInstaller" [silabser.Dev.NT.Wdf] KmdfService = silabser, silabser_wdfsect [silabser_wdfsect] KmdfLibraryVersion = 1.9

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• How to ask the boss to pay for qualifications?

  - by adamk

  Hi, I'm working as a junior developer for a startup company, and have been working here around 7 months now. After 4 months, we had a late quarterly review, and just before the boss mentioned there was a training budget, and we should let them know what training we needed and they'd get it for us. I asked for some training at the time, but 3 months have passed without mention of it, and I have since learnt what I needed in my own time (I just can't stop learning new things!) I took on a new role recently, so have been given some cheap ($60) training for that however. Now the next review is approaching, and I would like to get Adobe Qualified Expert qualifications for ActionScript 3 / Flex. I was told by a contracted co-worker who had left that I should try to get the company to pay for this, as it's something they can tell potential investors as a selling point. My question is though; how do I approach this with my boss? I don't want it to sound like I'm looking for another job and want the qualifications to look elsewhere!

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• UDP multicast streaming of media content over WIFI

  - by sajad

  I am using vlc to stream media content over wireless network in scenario like this (from content streamer to stream receiver client): The bandwidth of wireless network is 54 Mb/s and UDP stream's required bandwidth is only 4 Mb/s; however there is trouble in receiving media stream and quality of playing specifically in multicast mode; means I can play the stream but it has jitter and does not play smoothly. In uni-cast I can stream up to 5 media streams correctly, but in multicast mode there is problem with streaming just one media! However when I stream from client some multicast streams; the wifi access-point can receive data correctly and I can see the video in "udp streamer" side correctly even when number of multicast streams increases to 9; But as you see I want to stream from streaming server and receive media in client size. Is this a typical problem of streaming real-time contents over wireless networks? Is it necessary to change configurations of my WIFI switch or it is just a software trouble? thank you

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• Orange Brightbox and NO-IP.com

  - by JSweete

  Strange one here i didnt know where to ask, and i know this is a developer resource but i was hoping with everyones tech know how someone may have a solution for my problem. Ok i had an orange livebox before and in the dynamic dns settings it had no-ip.com as a drop down option with login variables to update my account with a dynamic ip address. This worked great for years. However my livebox died and i now have a orange brightbox, and this doesnt have no-ip.com as a login update option for dynamic dns on my router. Does any one have any idea how i can get my domain to point to my home server with a dynamic ip address ideally for free? This is merely for testing and to have a backup server for my main remote server.

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• Antenna Aligner part 2: Finding the right direction

  - by Chris George

  Last time I managed to get "my first app(tm)" built, published and running on my iPhone. This was really cool, a piece of my code running on my very own device. Ok, so I'm easily pleased! The next challenge was actually trying to determine what it was I wanted this app to do, and how to do it. Reverting back to good old paper and pen, I started sketching out designs for the app. I knew I wanted it to get a list of transmitters, then clicking on a transmitter would display a compass type view, with an arrow pointing the right way. I figured there would not be much point in continuing until I know I could do the graphical part of the project, i.e. the rotating compass, so armed with that reasoning (plus the fact I just wanted to get on and code!), I once again dived into visual studio. Using my friend (google) I found some example code for getting the compass data from the phone using the PhoneGap framework. // onSuccess: Get the current heading // function onSuccess(heading) {    alert('Heading: ' + heading); } navigator.compass.getCurrentHeading(onSuccess, onError); Using the ripple mobile emulator this showed that it was successfully getting the compass heading. But it didn't work when uploaded to my phone. It turns out that the examples I had been looking at were for PhoneGap 1.0, and Nomad uses PhoneGap 1.4.1. In 1.4.1, getCurrentHeading provides a compass object to onSuccess, not just a numeric value, so the code now looks like // onSuccess: Get the current magnetic heading // function onSuccess(heading) {    alert('Heading: ' + heading.magneticHeading); }; navigator.compass.getCurrentHeading(onSuccess, onError); So the lesson learnt from this... read the documentation for the version you are actually using! This does, however, lead to compatibility problems with ripple as it only supports 1.0 which is a real pain. I hope that the ripple system is updated sometime soon.

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• Ubuntu Slow - What architecture does the Windows Installer install?

  - by Benjamin Yep

  I feel absolutely limited by using Windows, and I need to switch to a Unix environment. I once installed Red Hat on my lappie (screen + external monitor setup; 4GB ram; x64; runs fast) and it worked fine, but I saw that the computer cluster that is the birthplace of my unix knowledge switched to Ubuntu, so naturally I follow. To the point. When I installed Ubuntu onto my machine via the Windows Installer, it ran quite slow. Opening Firefox takes about 8-9 seconds, it freezes up often, unable to handle its own background processes. I saw in a thread that, perhaps, it is running slow because the Windows Installer is installing an x64 version. Of course, my computer has had no performance issues in the past(except that time with the trojans but you know, know one is perfect ;) ) Anyways, I uninstalled Ubuntu, freeing up the max allocated memory it took up, and continue to be sad, trapped in my MS world with only a buggy Cygwin, any assistance is greatly appreciated! :) Thanks ~Ben

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• Does the term "Learning Curve" include the knowing of the gotchas?

  - by voroninp

  When you learn new technology you spend time understanding its concepts and tools. But when technology meets real life strange and not pleasant things happen. Reuqirements are often far from ideal and differ from 'classic' scenario. And soon I find myself bending the technology to my real needs. At this point I begin to know bugs of the system or that is is not so flexible as it seemed at the very begining. And this 'fighting' with technology consumes a great part of the time while developing. What is more depressing is that the bunch of such gotchas and workarounds are not concentrated at one place (book, site, etc.) And before you really confront it you cannot really ask the correct question because you do not even suspect the reason for the problem to occur (unknown-unknown). So my question consiststs of three: 1) Do you really manage (and how) to predict possible future problems? 2) How much time do you spend for finding the workaround/fix/solution before you leave it and switch to other problems. 3) What are the criteria for you to think about yourself as experienced in the tecnology. Do you take these gotchas into account?

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• Ubuntu 12.04 Frequent Kernel Panics

  - by Jordan Johns

  Dealing with what seems to be quantum behavior here. I'm having frequent Kernel panics and the problem is very hard to locate. To cut to the chase of what is going on I am essentially getting this screen: This occurs always after login (login screen is fine, can go into my TTY's and everything). But once I log in I have anywhere from 0 (instant) to 10 seconds before everything grinds to a halt and freezes. The only way I found out that it was a kernel panic was going into a TTY while it happens. At first, I figured something must be wrong with memory. Ran memtest86, full standard test. No errors. OK. CPU problem? Windows works fine, ran prime95 and a bunch of other torture tests for many hours. Drive problem? Nope. fsck reports no problems and the smart status is ok. Overclocking problem? Nope. Windows is working fine, and I also reset the bios to prove the point it was not the cause. At a loss here, even trying to reinstall the thing it gives me the same problem even attempting to install ubuntu (like right after you try to select "install ubuntu" or "try ubuntu first before installing"). Anyone have any thoughts? Its very bizarre, its as if my system hates linux and is trying to tell me not to use it (that would be a terrible reality). Thanks!

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• Where to Start?

  - by freemann098

  my name is Chase. I've been programming for over 3 years now and I've made very little progress towards game development. I blame myself for it due to reasons. I have experience in many languages such as C++, C#, and Java. I have a little bit of knowledge in JavaScript/HTML and Python. My question is where to start on actually understanding jumping into game development. Whenever I watch game development tutorials it mostly makes sense until points of things like OpenGL or advanced topics that make no sense at all. An example is something like glOrhho Matrix or whatever. Videos either don't explain things like this or they're not explained very well. Do I not know enough basics? I find myself always copying code from a video but understanding very little of it. It's like i'm memorizing things I don't understand which makes it hard to program at all. If I were to want to get to the point where I could write my own game engine or just a game by myself in general in C++ using at the most documentation how would I start at mastering to that level. Should I learn C first, or get really good at basics in general with C++. I know there is a similar posted question on this site but it's not the same due to the fact the person asking the question has a well knowledge level in programming. I'm stuck in a loop of learning the same things but if I go farther I don't understand. I'm stuck in the same spot and need to make progress.

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• Need ideas for an innovation week

  - by slandau

  So 4 times a year we have an innovation week (to even out the odd sprint releases). This whole week is dedicated to experimenting with new technology/ideas that could potentially help progress the software department or the company as a whole, and serve as sort of a starting point for new ideas and brainstorming. For example, the last one contained a lot of projects. One was the re-design of our web app into more of a Web 2.0 look and feel using JQuery and a lot of cool CSS tricks. Another was a proposal for a new bug tracking software as opposed to the clearly outdated one we use, and another was a very cool JQuery/Js design that could show the same page to multiple users on different computers and allow each of them to take "charge" of the page, disabling the other one from doing anything, and vice versa, seeing all updates in real time -- sort of like Netmeeting through Js. Well, this is my first one as a new employee so I wanted to think of something cool. We get one week (anywhere from 40-60 hours or so), and we usually pair up or do this in groups of 3-4, depending on how many projects there are. Projects have to get approved but usually that doesn't prove to be too difficult. We are in the financial analysis software industry if the domain was leading you guys to think of anything helpful. I am primarily working on a web app in MVC 2 at the moment using a lot of JQuery and a C# backend. Do you guys have any idea of something that would be cool/beneficial/worth it?

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• Mapping an sFTP connection to a Windows drive?

  - by Nicolas

  I'm looking for a way to map an sFTP connection to a Windows (Vista) drive. In other words, a tool that would add a new drive (let's say N:) to my computer, that would directly point to my remote server via sFTP. That way, "N:\my_dir\file.txt" would actually be something like "/home/user/my_dir/file.txt" on the remote server. Reading the file on Windows would download it, and writing content in it would upload it...network transfers being made via sFTP. I'm aware of Novell NetDrive, but it has various issues with long filenames, and seems to corrupt UTF-8 files content depending on the BOM. Do you know about any reliable alternative ? Thanks ! Edit : I have complete control of the remote server, except that it's remote enough for me not to be able to physically access it.

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• Learning good OOP design & unlearning some bad habits

  - by Nick

  I have been mostly a C programmer so far in my career with knowledge of C++. I rely on C++ mostly for the convenience STL provides and I hardly ever focus on good design practices. As I have started to look for a new job position, this bad habit of mine has come back to haunt me. During the interviews, I have been asked to design a problem (like chess, or some other scenario) using OOP and I doing really badly at that (I came to know this through feedback from one interview). I tried to google stuff and came up with so many opinions and related books that I don't know where to begin. I need a good through introduction to OOP design with which I can learn practical design, not just theory. Can you point me to any book which meets my requirements ? I prefer C++, but any other language is fine as long as I can pick-up good practices. Also, I know that books can only go so far. I would also appreciate any good practice project ideas that helped you learn and improve your OOP concepts. Thanks.

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• Object oriented wrapper around a dll

  - by Tom Davies

  So, I'm writing a C# managed wrapper around a native dll. The dll contains several hundred functions. In most cases, the first argument to each function is an opaque handle to a type internal to the dll. So, an obvious starting point for defining some classes in the wrapper would be to define classes corresponding to each of these opaque types, with each instance holding and managing the opaque handle (passed to its constructor) Things are a little awkward when dealing with callbacks from the dll. Naturally, the callback handlers in my wrapper have to be static, but the callbacks arguments invariable contain an opaque handle. In order to get from the static callback back to an object instance, I've created a static dictionary in each class, associating handles with class instances. In the constructor of each class, an entry is put into the dictionary, and this entry is then removed in the Destructors. When I receive a callback, I can then consult the dictionary to retrieve the class instance corresponding to the opaque reference. Are there any obvious flaws to this? Something that seems to be a problem is that the existence static dictionary means that the garbage collector will not act on my class instances that are otherwise unreachable. As they are never garbage collected, they never get removed from the dictionary, so the dictionary grows. It seems I might have to manually dispose of my objects, which is something absolutely would like to avoid. Can anyone suggest a good design that allows me to avoid having to do this?

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