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  • How much help should I give during technical interviews?

    - by kojiro
    I'm asked to perform or sit in during many technical interviews. We ask logic questions and simple programming problems that the interviewee is expected to be able to solve on paper. (I would rather they have access to a keyboard, but that is a problem for another time.) Sometimes I sense that people do know how to approach a problem, but they are hung up by nervousness or some second-guessing of the question (they aren't intended to be trick questions). I've never heard my boss give any help or hints. He just thanks the interviewee for the response (no matter how good or bad it is) and moves on to the next question or problem. But I know something about the rabbit hole that defeat and nerves can lead you down, and how it disables your mind, and I can't help wondering if providing a little help now and then would ultimately help us end up with more capable programmers instead of more failed interviews. Should I provide hints and assistance for befuddled interviewees (and if so, how far should I go while still being fair to the more prepared candidates)?

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  • Boot path not found, cannot start OS

    - by Dustin
    My desktop is 12.04 64bit, and it cannot boot from the hard drive anymore. When I attempt to it just is stuck on a blank screen with an blinking dash, and nothing happens. I checked with the bios trouble shoot for problems and it said that no boot path could be found. I do not know why this is happening, but need to fix it because it used to boot up normally. What I need to know is how to fix it. I can boot into a live DVD. Also, there were a few boots I would attempt to boot into a live USB, then it would boot to the hard drive, but that does not work any more. So with the live DVD (it is an 10.04 LTS 32bit), is there any means to correct the boot path from the live DVD? Thank you for your time and answers.

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  • Should extension scripts be run in a sandbox?

    - by Cubic
    In particular, this is about game extensions written in lua (luajit-2.0). I was contemplating whether I should restrict what these scripts can do, and arrived at the conclusion that I probably shouldn't: It's hard to get right. Sounds silly, but chances are my sandbox is gonna end up leaky anyways. The only benefit I could think of would be giving users some sense of security when running third party scripts. The disadvantages would be that it's just incredibly annoying for extension writers. That is, for now, myself (game content will be mostly scripted). The reason I'm asking this now before I actually have anything presentable is that adding a sandbox early on is easy, but would impose said annoying restrictions on myself too. However if I first go on with it and then later decide I do need a sandbox after all, I'm gonna run into problems (I'd either have to rewrite the scripts that are already there, or introduce some form of trust management system which seems to be more trouble than it's worth).

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  • Save Windows 8 Files and Install Ubuntu

    - by Nika
    I would like to install Ubuntu on my laptop. I am new to Ubuntu and therefore have some questions: 1.My hardware is Acer Emachines Intel Celeron T3000 1.8 3 Gig of Ram and Native Intel Intergrated graphics card. Can I run Ubuntu on this machine without any problems? 2.I am windows user and currently have windows 8. I want to install ubuntu but want to save all my directories on C:\ D:\ disks so that I can open my files in ubuntu. Is it possible to save my current directory system and save all my files after installing ubuntu? Can I open all my files? I have very important data in files so I dont want to lose them at all :) Thank You

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  • Package linux-headers-3.7.0-999 is not installed

    - by James Ward
    When trying to install the three amd64 debs for the 3.7.0 kernel from: http://kernel.ubuntu.com/~kernel-ppa/mainline/daily/2012-10-22-quantal/ I get this error: dpkg: dependency problems prevent configuration of linux-headers-3.7.0-999-generic: linux-headers-3.7.0-999-generic depends on linux-headers-3.7.0-999; however: Package linux-headers-3.7.0-999 is not installed. It installs and works correctly but leaves me with broken packages in Synaptic. Is this just a bug with how Ubuntu is packaging these latest debs? Or am I doing something wrong?

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  • Cannot install vim

    - by Max Popp
    I am running ubuntu 11.10, as xubuntu, in an amd64 pc, configured as dual boot with win7 . I tried installing vim with this: sudo apt-get install vim I got these error message: "The following packages have unmet dependencies: vim : Depends: vim-common (= 2:7.3.154+hg~74503f6ee649-2ubuntu2) but 2:7.3.154+hg~74503f6ee649-2ubuntu3 is to be installed E: Unable to correct problems, you have held broken packages." I only have a very faint idea of what the problem is, and none whatsoever on how to correct this. Hope you guys can help. Thanks

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  • Lenovo Y460 Shutdown/Reboot/Logoff doesn't work

    - by ultimatebuster
    This is a part of the massive dump of problems I'm encountering with my Lenovo Y460 and Ubuntu. Problem: Cannot shutdown/reboot/logoff. Logoff issue: http://ubuntuforums.org/showthread.php?t=1791439 Shutdown and Reboot often freezes without doing anything. Currently can only use hard reset. Maybe related to the tricks I did to work around the ATI/Intel issue. See: Lenovo Y460 ATI PowerXpress issue I'm not sure where I can find the shutdown/reboot logs. If you tell me I'll be happy to provide them. Not sure what to do as of right now other than never shutdown/reboot or logoff

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  • apt-get works with --force-yes but cannot reproduce the issue on a fresh box

    - by deepak
    apt-get does not work the first time but works the second time i install ntp like: apt-get -q -y install ntp=1:4.2.6.p3+dfsg-1ubuntu3.1 It failed saying: WARNING: The following packages cannot be authenticated! libcap2 libopts25 ntp E: There are problems and -y was used without --force-yes Afterwards i ran, apt-key update and ran the same commad with --force-yes: apt-get -q -y --force-yes install ntp=1:4.2.6.p3+dfsg-1ubuntu3.1 Thereafter running apt-get purge and reinstalling ntp runs. "without" --force-yes apt-get purge libcap2 libopts25 ntp apt-get -q -y install ntp=1:4.2.6.p3+dfsg-1ubuntu3.1 Also i created a fresh VM and could not reproduce the issue. On a fresh VM, the same apt-get command runs the first time, without "--force-yes" Two questions, why does running apt-get work the second time and cannot reproduce the error ? full errors and sequential steps at, https://gist.github.com/3017966

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  • Unable to use TL-WN821N

    - by udiw
    Hi, I got a TP-LINK USB wireless module - TL-WN821N, using Ubuntu 10.4 (same problems were also seen in 10.10). From everything I've read online, the usb should work just fine, since the Atheros ar9170 is built into the kernel. However, when I plug it in, it is detected as a USB device, but there is no wlan associated with it, and basically - nothing happens. Am I doing something wrong? what should I do so that the Atheros driver is associated with this device? btw, on Windows it works fine (with the drivers). Some logs: $ uname -mr 2.6.32-28-generic i686 $ lsb_release -d Description: Ubuntu 10.04.2 LTS $ lsusb ... (trimmed) Bus 002 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub Bus 001 Device 017: ID 0cf3:7015 Atheros Communications, Inc. Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub $ lsmod |grep ar9 ar9170usb 51296 0 ath 7611 1 ar9170usb mac80211 205402 3 ar9170usb,iwl3945,iwlcore cfg80211 126528 5 ar9170usb,ath,iwl3945,iwlcore,mac80211 led_class 2864 4 ar9170usb,iwl3945,iwlcore,sdhci

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  • What is the politically correct way of refactoring other's code?

    - by dukeofgaming
    I'm currently working in a geographically distributed team in a big company. Everybody is just focused on today's tasks and getting things done, however this means sometimes things have to be done the quick way, and that causes problems... you know, same old, same old. I'm bumping into code with several smells such as: big functions pointless utility functions/methods (essentially just to save writing a word), overcomplicated algorithms, extremely big files that should be broken down into different files/classes (1,500+ lines), etc. What would be the best way of improving code without making other developers feel bad/wrong about any proposed improvements?

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  • Xubuntu 14.04 will not boot after preseed installation

    - by Christian
    I recently set up Xubuntu 14.04 installation using preseed, and ran into a couple of problems during boot time. At first, right after the installation completed during first boot the system complained about /tmp not being mounted and did not proceed any further. I was able to fix that problem by making an entry for /tmp in /etc/fstab like so: tmpfs /tmp tmpfs optional,nodev,nosuid 0 0 This worked for a while (and still does for workstations that are already running), but newly installed machines are broken. They do not complain like before, but take forever to boot (2h) and it seems the root partition is mounted read only and you cannot do anything useful with the system. Any ideas on what to do? You can find the presseed file here Thanks in advance Update: If I get it to boot once via some magic in rescue mode (like simply mounting the root partition read-write, then resume boot) it will work forever. While this is a workaround, it is no option to do this for every installation.

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  • Is installing Ubuntu 10.10 still a viable option?

    - by Kartik Anand
    I fell in love with ubuntu when 10.10 was released. It was the perfect OS for me, but then, the 11 and the 12 series came, and I starting hating it (Pun intended) But seriously, I want to stick to ubuntu 10.10, I have the .iso file with me. I want to go ahead and install it. My question is, since its not currently supported, what problems will I face? Will I be eligible for update? I mean atleast till the time it was supported Can I somehow get security updates and patches Will the latest software available still run on ubuntu 10.10 I don't care much about drivers, as much as I care about python, php, apache, wine and other softwares. Will the software center work?and be updates as well? What issues am I most prone to face?

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  • Ubuntu Server won't boot with "zip2: Compressed file ends unexpectedly" error

    - by Oetzi
    I am trying to boot lucid server on my new VPS but its giving me some problems. The boot gets to a point where it hangs. At this point it says: No such file `modules-2.6.31-20-server-amd64.tar.bz2' zip2: Compressed file ends unexpectedly You can use the `bzip2recover' program to attempt to recover data from undamaged sections of corrupted files. tar: Child returned status 2 tar: Exiting with failure status due to previous errors Module installation failed. Does anyone have any ideas how I might be able to fix this? Sorry that this is rather vague!

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  • Partitioning Windows 7 so I can use ubuntu

    - by thommo1919
    I have been recording happily using Audacity for many years but after upgrading to Windows 7, the latency has meant that recording music is impossible. My mate suggested partitioning my hard drive, installing ubuntu on it and then using this alongside Windows. He reckons I can use music recording software then on the partitioned Ubuntu drive without the latency problems. A few questions: a) Is my mate correct? b) How do I go about doing the partition and installing? c) What music recording software would you recommend? Many many thanks to anyone who can help me.

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  • Functional Programming - Does Knowing It Help Job Prospects?

    - by Jetti
    The main language that I use at the moment is C# and I am the most comfortable with it. However, I have started dabbling in F# and Haskell and really enjoy those langauges. I would love to improve my skills in either of those languages over time since it truly is fun for me to use them (as opposed to Ruby, which is hyped as "fun", I just don't get where the fun is, but I digress...). My question is directed at those who have hired/interviewed for programming positions (junior/mid-level): if you see a functional programming language on a resume, does it affect your opinion (whether positive or negatively) of that candidate? My rationale for knowledge of functional programming affecting the view of a candidate is because it can show that the candidate can adapt to different methodologies and take a mulit-dimensional approach to problems rather than the "same old OO approach". (This may be off-base, please let me know if this assumption is as well!)

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  • No 'Hardware' tab in audio and no profiles

    - by Gene
    If I run the 12.x ubuntu (latest May 2012) from the CD, I get full audio settings, and sound playing in speaker. Profiles let me change analog to digital in/out. Once I run install from the same CD onto the laptop HD, once it boots the first time, after selecting audio settings, there is no 'Hardware' tab and no way to change profiles. Worst part is the audio device is set to SPDIF so nothing comes out of the speakers. Very off how booting off the CD I can get analog audio, and installing to HD and booting seems to limit the profile to something useless. Laptop is a 5 year old Dell D820 with Nvidea 128meg video on a 1920x1200 screen and T7200 CPU. I suspect if I could get the damn HARDWARE tab back in audio settings, I could just select the proper Analog profile - just as is the case if running from a boot CD. Searched the web, no similar problems found... any help appreciated!

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  • Upgrade from 10.10 to 11:04 to 11.10. X starts, Unity desktop not there

    - by Stefan Lasiewski
    I upgraded my Ubuntu Desktop 10.10 system to 11.04 and then 11.10. Now, when I start Ubuntu, the Unity desktop doesn't start correctly. Here's what I do: Start computer I log in via the GUI login screen The X Window System starts. I can see an arrow icon for the mouse, and can move it around the screen. Nothing else starts. There are no desktop icons, no launcher, no taskbar, etc. Right clicking on desktop does nothing. I've tried some common keyboard shortcuts ("Alt-tab" "Ctrl-Alt-T" "Ctrl-Alt-Backspace") but nothing happens. If I go to another Virtual Console, and run the command unity, the Unity desktop will start on my primary X desktop. However I'm seeing many problems like windows which are only half-drawn, some applications run without the familiar "Minimize, Maximize, Close" What's happening here? It seems that the X Window System started, but Unity did not start? How can I debug this?

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  • Android Loading Screen: How do I use a stack to load elements?

    - by tom_mai78101
    I have some problems with figuring out what value I should put in the function: int value_needed_to_figure_out = X; ProgressBar.incrementProgressBy(value_needed_to_figure_out); I've been researching about loading screens and how to use them. Some examples I've seen have implemented Thread.sleep() in a Handler.post(new Runnable()) function. To me, I got most of that concept of using the Handler to update the ProgressBar, while pretending to do some heavy crunching work. So, I kept looking. I have read this thread here: How do I load chunks of data from an assest manager during a loading screen? It said that I can try using a stack it needs to load, and adding a size counter as I add elements to the stack. What does it mean? This is the part where I'm totally stumped. If anyone would provide some hints, I'll gladly appreciate it. Thanks in advance.

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  • Have you ever done a project using a languages that is not the mainstream choice for the specific niche of the project? Why?

    - by EpsilonVector
    I was thinking about my academic experience with Smalltalk (well, Squeak) a while ago and whether I would like to use it for something, and it got me thinking: sure, it's as good and capable as any popular language, and it has some nice ideas, but there are certain languages that are already well entrenched in certain niches of programming (C is for systems programming, Java is for portability, and so on...), and Smalltalk and co. don't seem to have any obvious differentiating features to make them the right choice under certain circumstances, or at least not as far as I can tell, and when you add to it the fact that it's harder to find programmers who know it it adds all sorts of other problems for the organization itself. So if you ever worked on a project where a non-mainstream language (like Smalltalk) was used over a more mainstream one, what was the reason for it? To clarify: I'd like to focus this on imperative languages.

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  • LGPL License in commercial application

    - by Jacob
    I have searched around but I don't seem to be able to get a clear answer on my questions that I understand. I want to use the Xuggler library in my application, which is licensed either GPL or LGPL depending on whether I compile it myself. I don't intend to edit the library If I compile it myself and thus get a LGPL version of the library, can I use it in a commercial application without having to distribute the source code of my application? Furthermore, do I have to give my application the LGPL license as well? What other problems might using this library give me?

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  • Recommended book on Actors concurrency model (patterns, pitfalls, etc.)?

    - by Larry OBrien
    The Actors concurrency model is clearly gaining favor. Is there a good book that presents the patterns and pitfalls of the model? I am thinking about something that would discuss, for instance, the problems of consistency and correctness in the context of hundreds or thousands of independent Actors. It would be okay if it were associated with a specific language (erlang, I would imagine, since that seems universally regarded as the proven implementation of Actors), but I am hoping for something more than an introductory chapter or two. (FWIW, I'm actually most interested in Actors as they are implemented in Scala.)

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  • Help with Kodak esp 3250 printer driver on Lubuntu 12.1 SOLVED!

    - by user108608
    First my system: pentium 4 -don't remember the speed-, 1g ram, dual boot to separate physical drives, Fdos and Lubuntu 12.1 second my lan: I have four computers operating for the same printer. 1. Intel quad core i5, 4g ram, running Windoze 7 64 bit, printer connected and shared from here. Kodak ESP 3250 2. Gateway 17" laptop running Windoze 7 32bit 3. Asus tablet (small laptop) running Lumbutu 12.1 4. My dual boot system running Fdos and Lubuntu 12.1 The problem: I downloaded c2esp_25c-1_i386.deb, tried to install it using DEBI Package Installer, it loads the files, looks for cups driver and ends with an error: "Dependancy is not satisfiable: libcupsdriver1 (=1.4.0)" What do I do now? Is there some place that I can get the correct cups driver? further information: The Asus tablet was running Ubuntu 12.1 (very slowly and with a few crashes) and could print from the lan printer with no problems. Is there something in Ubuntu that can be loaded into Lubuntu? noobee user hoping for answers, Paul

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  • Project Euler 3: (Iron)Python

    - by Ben Griswold
    In my attempt to learn (Iron)Python out in the open, here’s my solution for Project Euler Problem 3.  As always, any feedback is welcome. # Euler 3 # http://projecteuler.net/index.php?section=problems&id=3 # The prime factors of 13195 are 5, 7, 13 and 29. # What is the largest prime factor of the number # 600851475143? import time start = time.time() def largest_prime_factor(n): max = n divisor = 2 while (n >= divisor ** 2): if n % divisor == 0: max, n = n, n / divisor else: divisor += 1 return max print largest_prime_factor(600851475143) print "Elapsed Time:", (time.time() - start) * 1000, "millisecs" a=raw_input('Press return to continue')

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  • Touchpad in Sony Vaio E14 - cannot click with a finger and drag with another - Ubuntu 12.04

    - by Nabeel
    I had the following issues with my Sony Vaio E14115's touchpad on Ubuntu 12.04: Right click not working Vertical scrolling not working Then I followed these steps to fix it: Downloaded a patch for Psmouse sudo apt-get install dkms build-essential cd ~/Desktop tar jxvf psmouse-3.2.0-24-generic-pae.tar.bz2 sudo mv psmouse-3.2.0-24-generic-pae /usr/src cd /usr/src sudo chmod -R a+rx psmouse-3.2.0-24-generic-pae sudo dkms add -m psmouse -v 3.2.0-24-generic-pae sudo dkms build -m psmouse -v 3.2.0-24-generic-pae sudo dkms install -m psmouse -v 3.2.0-24-generic-pae sudo modprobe -r psmouse sudo modprobe psmouse This fixed me the problems of Rightclick and vertical scrolling. But I still have an issue of not able to click and drag ie Clicking the leftmouse button and dragging with another finger. It doesn't move! Maybe it doesn't detect the 2nd finger. When I check the capabilities of my Synaptics touchpad by using xinput list-props "SynPS/2 Synaptics TouchPad"|grep Capabilities I get the following output: Synaptics Capabilities (304): 1, 1, 1, 1, 1, 1, 1 Please help me out.

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  • C# inherit from a class in a different DLL

    - by Onno
    I need to make an application that needs to be highly modular and that can easily be expanded with new functionality. I've thought up a design where I have a main window and a list of actions that are implemented using a strategy pattern. I'd like to implement the base classes/interfaces in a DLL and have the option of loading actions from DLL's which are loaded dynamically when the application starts. This way the main window can initiate actions without having to recompile or redistribute a new version. I just have to (re)distribute new DLL's which I can update dynamically at runtime. This should enable very easy modular updating from a central online source. The 'action' DLL's all inherit their structure from the code defined in the the DLL which defines the main strategy pattern structure and it's abstract factory. I'd like to know if C# /.Net will allow such a construction. I'd also like to know whether this construction has any major problems in terms of design.

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