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• Internet slow on one router only [the problem only in Ubuntu] [on hold]

  - by mrSuperEvening

  Internet works perfectly on every other router, but browsing sucks at home (slow browsing and slow loading times). I changed DNS servers to 8.8.0.0, still doesn't help. And funnily, download speed is extremely high on this network (meaning torrents for example), but using browsers and loading websites is extremely slow (only on this network). Do I need to change something in router settings or what can I try? By the way, I use wired connection to router. EDIT: There's no problems when using Windows. EDIT: ifconfig: eth0 Link encap:Ethernet HWaddr f2:4d:a0:c0:3f:4c inet addr:192.168.11.8 Bcast:192.168.11.255 Mask:255.255.255.0 inet6 addr: fe80::f24d:a2ff:fec6:3f4c/64 Scope:Link UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1 RX packets:206798 errors:0 dropped:0 overruns:0 frame:0 TX packets:219570 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:1000 RX bytes:76680734 (76.6 MB) TX bytes:21738160 (21.7 MB) lo Link encap:Local Loopback inet addr:127.0.0.1 Mask:255.0.0.0 inet6 addr: ::1/128 Scope:Host UP LOOPBACK RUNNING MTU:65536 Metric:1 RX packets:160 errors:0 dropped:0 overruns:0 frame:0 TX packets:160 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:0 RX bytes:11094 (11.0 KB) TX bytes:11094 (11.0 KB)` ping -c 2 4.2.2.2 PING 4.2.2.2 (4.2.2.2) 56(84) bytes of data. --- 4.2.2.2 ping statistics --- 2 packets transmitted, 0 received, 100% packet loss, time 1007ms ping -c 2 google.com PING google.com (213.159.32.147) 56(84) bytes of data. 64 bytes from lan-213-159-32-147.kns.skynet.lv (213.159.32.147): icmp_seq=1 ttl=61 time=0.936 ms 64 bytes from lan-213-159-32-147.kns.skynet.lv (213.159.32.147): icmp_seq=2 ttl=61 time=0.937 ms --- google.com ping statistics --- 2 packets transmitted, 2 received, 0% packet loss, time 1001ms rtt min/avg/max/mdev = 0.936/0.936/0.937/0.030 ms

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• Static pages for large photo album

  - by Phil P

  I'm looking for advice on software for managing a largish photo album for a website. 2000+ pictures, one-time drop (probably). I normally use MarginalHack's album, which does what I want: pre-generate thumbnails and HTML for the pictures, so I can serve without needing a dynamic run-time, so there's less attack surface to worry about. However, it doesn't handle pagination or the like, so it's unwieldy for this case. This is a one-time drop for pictures from a wedding, with a shared usercode/password for distribution to the guests; I don't wish to put the pictures in a third-party hosting environment. I don't wish to use PHP, simply because that's another run-time to worry about, I might relent and use something dynamic if it's Python or Perl based (as I can maintain things written in those). I currently have: Apache serving static files, Album-generated, some sub-directories to divide up the content to be a little more manageable. Something like Album but with pagination already handled would be great, but I'm willing to have something a little more dynamic, if it lets people comment or caption and store the extra data in something like an sqlite DB. I'd want something light-weight, not a full-blown CMS with security updates every three months. I don't want to upload pictures of other peoples' children into a third-party free service where I don't know what the revenue model is. (For my site: revenue is none, costs out of pocket). Existing server hosting is *nix, Apache, some WSGI. Client-side I have MacOS. Any advice?

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• For a large website developed in PHP, is it necessary to have a framework?

  - by Martin

  I am wondering if it is necessary to have a framework or if it is a must-have if I plan to make a large website. Large website could mean a lot of things: in other words, multiple dynamic web pages (40-50 dynamic pages, mysql content) and a lot of visitors (+- a million hits per month). The site will be hosted in a dedicated server environment. I know that it could simplify coding for a developer team, that it includes libraries and a lot of advantages. But I just feel that I don't need that. I think that learning how it works, managing it and installing it would take more time and I could use that time to code. I write PHP the simplest way I could (with performance in mind) and I try to reuse my code/functions/classes most of the time and I make sure that if another developer joins the team, that he won't be lost in the code. I am also planning to use MemCached or another Cache for PHP. As I said, the site will be hosted in a dedicated server environment but will be entirely managed by the hosting company. I am pretty sure the control panel for me to control the basic stuff will be Cpanel. For a developer like me that only knows PHP, Javascript, HTML, CSS, MYSQL and really basic server management, I feel that it seems to complicated to have a framework. Am I wrong? Is it worth the time to learn all about it? Thank you for your opinions and suggestions.

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• Can it be a good idea to lease a house rather than a standard office-space for a software development shop? [closed]

  - by hamlin11

  Our lease is up on our US-based office-space in July, so it's back on my radar to evaluate our office-space situation. Two of our partners rather like the idea of leasing a house rather than standard office-space. We have 4 partners and one employee. I'm against the idea at this moment in time. Pros, as I see them Easier to get a good location (minimize commutes) All partners/employees have dogs. Easier to work longer hours without dog-duties pulling people back home More comfortable bathroom situation Residential Internet Rate Control of the thermostat Clients don't come to our office, so this would not change our image The additional comfort-level should facilitate a significantly higher-percentage of time "in the zone" for programmers and artists. Cons, as I see them Additional bills to pay (house-cleaning, yard, util, gas, electric) Additional time-overhead in dealing with bills (house-cleaning, yard, util, gas, electric) Additional overhead required to deal with issues that maintenance would have dealt with in a standard office-space Residential neighbors to contend with The equation starts to look a little nasty when factoring in potential time-overhead, especially on issues that a maintenance crew would deal with at a standard office complex. Can this be a good thing for a software development shop?

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• Wired connection to windows ISC stopped working

  - by cmpickle

  I have had my Linux box connected to the internet through a Windows computer by wiring them together with a cat5 cable then the Windows is connected wireless to a router. This setup has worked since I got the Linux box but just yesterday stopped working. The changes that occurred were: I changed networking so that I was connecting the Linux box and Windows computer through a second router so during that time the Linux box went through a router to connect to the Windows computer that was still connected wireless to the first router. The Internet didn't work on the Linux box at the time they second router was involved when I removed it and directly connected the Linux box and Windows the Internet worked again. Another thing that changed was that I had disconnected my Windows computer from all network connections and deleted them to make my Ethernet work better. Also at that time my dad had I connect the Windows to a third router and changed some settings in it. After reconnecting this time the connection between the router and the windows would not establish. If anyone has any ideas as to why this is I would greatly appreciate it!

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• Does it make sense to write build scripts in C++?

  - by Klaim

  I'm using CMake to generate my projects IDE/makefiles, but I still need to call custom "scripts" to manipulate my compiled files or even generate code. In previous projects I've been using Python and it was OK, but now I'm having serious trouble managing a lot of dependencies in two very big projects I'm working on so I want to minimize the dependencies everywhere. Someone suggested to me to use C++ to write my build scripts instead of adding a language dependency just for that. The projects themeselves already use C++ so there are several advantages that I can see: to build the whole project, only a C++ compiler and CMake would be necessary, nothing else (all the other dependencies are C or C++); C++ type safety (when using modern C++) makes everything easier to get "correct"; it's also the language I know the better so I'm more at ease with it even if I'm able to write some good Python code; potential gain in execution speed (but i don't think it will really be perceptible); However, I think there might be some drawbacks and I'm not sure of the real impact as I didn't try yet: might be longer to write the code (that said I'm not sure because I'm efficient enough in C++ to write something that work quickly, so maybe for this system it wouldn't be so long to write) (compilation time shouldn't be a problem for this case); I must assume that all the text files I'll read as input are in UTF-8, I'm not sure it can be easilly checked at runtime in C++ and the language will not check it for you; libraries in C++ are harder to manage than in scripting languages; I lack experience and forsight so maybe I'm missing advantages and drawbacks. So the question is: does it make sense to use C++ for this? do you have experiences to report and do you see advantages and disadvantages that might be important?

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• PHP Debugging

  - by Bob Porter

  Originally posted on: http://geekswithblogs.net/blogofbob/archive/2013/06/25/php-debugging.aspxI have been experimenting setting up a PHP development environment. I have been trying on Windows, Linux (Ubuntu) and Mac OS X. So far my favorite environment is on Mac OS X. I have tried a number of IDE's and debuggers as well.  IDE's Eclipse with the PDT Add On The PDT version of Eclipse Aptana Zend Netbeans  Debuggers Zend XDebug So far the only environments that I could get running quickly were Zend and Netbeans. Eclipse is a nightmare of versions and capabilities. I could only get Eclipse working well on Windows. On Ubuntu I was able to get the debugger working once. Thats it, one session, then it never worked again. I love the Zend tools and environment and it worked well everywhere I tried it, but it was beyond my budget.  Aptana also worked best on Windows, on Mac OS X it was fragile and I never could get debugging to work.  Netbeans worked first time, every time, every where. With one oddity, after several debugging sessions the debugger would refuse to connect. On every platform, I would end having to reboot to restore debugging, which would then work correctly for quite some time. I am sure I will discover that some process is hanging and there is a less intrusive way to clear the issue, but for now rebooting always works. In a future post I will go over how exactly I set my environment up, for now I have decided to stay with OS X. By the way, I did NOT use MAMP or the Zend Server, I stuck with PHP compiled and built from source, as well as Apache and MySQL installed locally. I use Homebrew as a package manager for OS X. I tried PORT but did not like the fact I had to sudo all the time to use it, and it installed things in /opt which I was not used to. Homebrew does sandbox the apps but it is nice enough to symlink them to their "normal" locations usually in /usr/local.

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• MVC pattern synchronisation

  - by Hariprasad

  I am facing a problem in synchronizing my model and view threads I have a view which is table. In it, user can select a few rows. I update the view as soon as the user clicks on any row since I don't want the UI to be slow. This updating is done by a logic which runs in the controller thread below. At the same time, the controller will update the model data too, which takes place in a different thread. i.e., controller puts the query in a queue, which is then executed by the model thread - which is a single-threaded interface. As soon as the query executes, controller will get a signal. Now, In order to keep the view and model synchronized, I will update the view again based on the return value of the query (the data returned by model) - even though I updated the view already for that user action. But, I am facing issues because, its taking a lot of time for the model to return the result, by that time user would have performed multiple clicks. So, as a result of updating the view again based on the information from model, the view sometimes goes back to the state in which the previous clicks were made (Suppose user clicks thrice on different rows. I update the view as soon as the click happens. Also, I update the view when I get data back from the model - which is supposed to be same as the already updated state of the view. Now, when the user clicks third time, I get data for the first click from model. As a result, view goes back to a state which is generated by the first click) Is there any way to handle such a synchronization issue?

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• Screen going black, further investigation reveals healthy ram and hard disk, and several kernel oops logs

  - by Virulan

  Six days ago, I went to go take a shower, and I suspended Ubuntu as usual, to save battery life. I came back, and the screen was black. REISUB and general fiddling around did nothing. Restarted, and still had nothing on the screen. Since then, this has happened several times, and the only fix is to 1) force shut laptop, 2) take out battery, 3) hold power button, 4) put battery back in, 5) boot. I have investigated further into the matter, doing a ram test and a hard disk check. Both turned out fine, but then my attention turned towards the error messages I was receiving upon bootup, the whole "System program problem detected" dealio. I did some digging and found four kernel oops logs in my /var/crash. What I can understand of them points to two things, 1) they are connected to my suspending problems, since there are four them (I have had four suspending crashes), and they both confirm that there was a issue with waking up from suspend, and 2) the crashes might have to do with Python (possibly could be jumping to conclusions), since mentions of Python are peppered throughout the logs. At this point, I am unsure of how to continue, and I have come here for help. Is there any way I can fix this? Should I start by uploading the logs here?

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• Being stupid to get better productivity?

  - by loki2302

  I've spent a lot of time reading different books about "good design", "design patterns", etc. I'm a big fan of the SOLID approach and every time I need to write a simple piece of code, I think about the future. So, if implementing a new feature or a bug fix requires just adding three lines of code like this: if(xxx) { doSomething(); } It doesn't mean I'll do it this way. If I feel like this piece of code is likely to become larger in the nearest future, I'll think of adding abstractions, moving this functionality somewhere else and so on. The goal I'm pursuing is keeping average complexity the same as it was before my changes. I believe, that from the code standpoint, it's quite a good idea - my code is never long enough, and it's quite easy to understand the meanings for different entities, like classes, methods, and relations between classes and objects. The problem is, it takes too much time, and I often feel like it would be better if I just implemented that feature "as is". It's just about "three lines of code" vs. "new interface + two classes to implement that interface". From a product standpoint (when we're talking about the result), the things I do are quite senseless. I know that if we're going to work on the next version, having good code is really great. But on the other side, the time you've spent to make your code "good" may have been spent for implementing a couple of useful features. I often feel very unsatisfied with my results - good code that only can do A is worse than bad code that can do A, B, C, and D. Are there any books, articles, blogs, or your ideas that may help with developing one's "being stupid" approach?

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• 25 years old and considering a career change...possible? practical?

  - by mq330

  Hi all, I'm new to this site and new to programming as well. I've spent some time going through an intro cs book that uses python as the language of choice. I find the exercises interesting and engaging and I generally have had a favorable experience programming so far. I've gone through some of the basics with python like writing simple programs, basics of GUIs, manipulating strings, lists, defining functions, etc. And I've always loved technology. Although I've never done any real hardcore programming yet, I was inclined to building websites from a very young age but I never really developed my skills. Now, the thing is I'm 25, I have my bacholors in environmental studies and two masters degrees in urban planning and landscape architecture respectively. I know, it would be quite a departure to pursue a career in programming at this point. Currently, I'm working as a geographic information systems intern. I've taken some GIS classes and have a lot of experience with making maps, doing spatial analysis etc. So what I'm thinking is maybe I can learn some solid programming skills and apply these skills in the field of GIS. From what I've seen, .net languages are the norm in this arena. Could you perhaps provide some guidance to me in terms of what languages I should focus on or courses I should take at this point? What about for building web mapping applications? Also, I was thinking about getting a certificate in programming from a university extension program. Do you think it would be worth it? And furthermore, do you think potential employers would be interested in hiring someone like me (once I get a couple of languages down pretty well) as an intern or in an entry level position? I'll be living in the bay area so I feel that there should be decent opportunities even though I don't have a b.s. in cs.

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• Space Invaders-type game: Keeping the enemies aligned with each other as they turn around?

  - by CorundumGames

  OK, so here's the lowdown of the problem I'm trying to solve. I'm developing a game in PyGame that's a cross between Space Invaders and Columns. I'm trying to make the motion of the enemies similar to that of the aliens in Space Invaders; that is, they're all clustered in a grid, and if even one hits the side of the screen, the entire formation moves down and turns around. However, the motion of these aliens is continuous (as continuous as a monitor can be, anyway), not on a discrete grid like in the original. The enemies are instances of an Enemy class, and in turn they're held by a 2D array in a enemysquadron module (which, if you don't use Python, is in this case essentially a singleton due to the way Python modules work). Inside the Enemy class I have a class-scope velocity vector that is reversed every time an Enemy object touches the edge of the screen. This won't do, though, because as time goes on the enemies just become disorganized and jumbled (i.e. not in a grid as planned). I haven't implemented the Enemies going downward yet, so let's not worry about that right now. Any tips?

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• Testing my model for hybrid scheduling in Embedded Systems

  - by markusian

  I am working on a project for school, where I have to analyze the performances of a few fixed-priority servers algorithms (polling server, deferrable server, priority exchange) using a simulator in the case of hybrid scheduling, where we have both hard periodic tasks and soft aperiodic tasks. In my model I consider that: the hard tasks have a period equal to their deadline, with a known worst case execution time (wcet). The actual execution time could be smaller than the wcet. the soft tasks have a known wcet and random interarrival times. The actual execution time could be smaller than the wcet. In order to test those algorithms I need realistic case studies. For this reason I'm digging in the scientific literature but I am facing different problems: Sometimes I find a list of hard tasks with wcet, but it is not specified how the soft tasks parameters are found. Given the wcet of a task, how can I model its actual execution time? This means, what random distribution should I use considering the wcet? How can I model the random interarrival times of soft aperiodic tasks?

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• Life Is Full Of Changes (Part 1)

  - by Brian Jackett

  Today will be my last day with Sogeti.  I’ve been with Sogeti USA for just over 4 years.  In that time I’ve gotten to work on some great projects, develop relationships with some brilliant and passionate people, participate in the .Net developer and SharePoint communities, and grow my skills in a number of areas I’m passionate about.     As with all good things they must come to an end though.  I’ve accepted a position with another company and will provide more details once the transition has completed.  This decision was a difficult one to make but it provides a great career opportunity on many levels.  As much as my new schedule allows I plan to continue participating in local user groups, speaking at conferences, and blogging.     Speaking of which, you may have noticed my reduced blogging activity in the past few months.  In addition to a career change I’m also in the process of moving to a new residence (only a few miles from my current residence, so I’ll still be in Columbus.)  Searching for a new place, filling out paperwork, and all of the other work associated with this move has taken away a good chunk of the time I used to devote to blogging.  Once everything gets settled out with the move and job change I’ll re-evaluate how much time I can devote to blogging.     A big thanks to Sogeti and everyone who has been so supportive over my time with them.  It’s hard to move on, but I am excited for the prospects that the future will bring.         -Frog Out

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• two guitexture that do not work together

  - by London2423

  I have two GUITexture that move left and right a cube. Is pretty strange but together they don't work. If I activate only one it works. To be more specific: If I have the left GUItexture alone in the game the cube move left. If I have the right GUITexture activated alone the cube move right. Seems all fine I thought but If I have both of them the cube move only right and not left. Where is the mistake? Here is the code inside the GameObject cube for Right move void OnMousedown () { transform.position += Vector3.right * Time.deltaTime; } For Left move void OnMousedown () { transform.position += Vector3.left * Time.deltaTime; } And this is the left GUITexture code //move the cube left Cube.GetComponent<Left> ().enabled = true; left.transform.position += Vector3.left * Time.deltaTime; This is the right GUITexture //move the cube right Cube.GetComponent<Left> ().enabled = true; right.transform.position += Vector3.right * Time.deltaTime; What is the reason for this? I hope someone can help me.

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• How do you tell if advice from a senior developer is bad?

  - by learnjourney

  Recently, I started my first job as a junior developer and I have a more senior developer in charge of mentoring me in this small company. However, there are several times when he would give me advice on things that I just couldn't agree with (it goes against what I learned in several good books on the topic written by the experts, questions I asked on some Q&A sites also agree with me) and given our busy schedule, we probably have no time for long debates. So far, I have been trying to avoid the issue by listening to him, raising a counterpoint based on what I've learned as current good practices. He raises his original point again (most of the time he will say best practice, more maintainable but just didn't go further), I take a note (since he didn't raise a new point to counter my counterpoint), think about it and research at home, but don't make any changes (I'm still not convinced). But recently, he approached me yet again, saw my code and asked me why haven't I changed it to his suggestion. This is the 3rd time in 2--3 weeks. As a junior developer, I know that I should respect him, but at the same time I just can't agree with some of his advice. Yet I'm being pressured to make changes that I think will make the project worse. Of course as an inexperienced developer, I could be wrong and his way might be better, it may be 1 of those exception cases. My question is: what can I do to better judge if a senior developer's advice is good, bad or maybe it's (good but outdated in today context)? And if it is bad/outdated, what tactics can I use to not implement it his way despite his 'pressures' while maintaining the fact that I respect him as a senior?

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• Learning how to design knowledge and data flow [closed]

  - by max

  In designing software, I spend a lot of time deciding how the knowledge (algorithms / business logic) and data should be allocated between different entities; that is, which object should know what. I am asking for advice about books, articles, presentations, classes, or other resources that would help me learn how to do it better. I code primarily in Python, but my question is not really language-specific; even if some of the insights I learn don't work in Python, that's fine. I'll give a couple examples to clarify what I mean. Example 1 I want to perform some computation. As a user, I will need to provide parameters to do the computation. I can have all those parameters sent to the "main" object, which then uses them to create other objects as needed. Or I can create one "main" object, as well as several additional objects; the additional objects would then be sent to the "main" object as parameters. What factors should I consider to make this choice? Example 2 Let's say I have a few objects of type A that can perform a certain computation. The main computation often involves using an object of type B that performs some interim computation. I can either "teach" A instances what exact parameters to pass to B instances (i.e., make B "dumb"); or I can "teach" B instances to figure out what needs to be done when looking at an A instance (i.e., make B "smart"). What should I think about when I'm making this choice?

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• VMware Player 5.0 or VMware Workstation 9.0 after upgrade to Ubuntu 12.10

  The upgrade process Upgrading Ubuntu 12.04 to latest version 12.10 - aka Quantal Quetzal - is straight forward and you only need to follow the offical upgrade instructions. Short version on the console looks like this: sudo do-release-upgrade This will update the repository entries, and start the upgrade process. After some minutes or hours of download and installation, you have to reboot your system once to get the new kernel loaded. As time of writing, I'm on '3.5.0-17-generic'. And as with any modification of the kernel version, you have to compile the necessary kernel modules to get VMware Player or Workstation up and running. Usually, this happens the first time you try start your VMware software and that's it. Well, again not so this time. Getting the kernel patch Luckily, the community over VMware is very active and you can get a new kernel patch in the online forums here. Get the download and put in a folder have write permissions. Then you extract the archive on the console like so: tar -xjvf vmware9_kernel35_patch.tar.bz2 Then you change into the newly created folder: cd vmware9_kernel3.5_patch/ And you execute the available shell script as root (superuser) like so: sudo ./patch-modules_3.5.0.sh This will stop any running instances of VMware software, patches the source files and runs the compile process for your active environment. This might take some time depending on your machine, and once completed you can start VMware Player or Workstation as previously. In case that you are going to apply the patch again, the script will simply quit with the following output: /usr/lib/vmware/modules/source/.patched found. You have already patched your sources. Exiting You might remove the .patched file in case that you upgraded/changed your kernel and you need to apply the patch again. Disclaimer: The patch is "as-is" and the patcher is originally created by Artem S. Tashkinov, and later modified by An_tony. Please refer to the VMware forum in case of questions or problems. There are also patches available for older versions of VMware Player or Workstation.

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• handling multiple interviews / offers [closed]

  - by farble1670

  What's the best way to handle a situation where you have, or expect to have multiple offers? The ideal situation is that your several offers come in about the same time, and you make a choice. this is not how it happens though. You may have an offer, and several near-final interviews lined up for the following days or weeks. One way to handle it would be to ask for a longer time to decide on the first offers you receive. 2 weeks? This gives time to rush the rest of the things you have going through to an end. i question whether asking for 2 weeks to decide is reasonable though. My guess is that an employer would see through that and force your hand. Another way to handle it would be to accept the first offer, and ask for a reasonable period before your start date, then simply "quit" the first position before you ever start if something better comes along. On one hand, employment is at-will, and employers exercise this fact regularly. On the other hand, it seems morally the wrong thing, and has the potential to burn some bridges. And of course the last option is to simply evaluate each offer in isolation, and accept or reject within the given time frame. any thoughts?

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• Context switches much slower in new linux kernels

  - by Michael Goldshteyn

  We are looking to upgrade the OS on our servers from Ubuntu 10.04 LTS to Ubuntu 12.04 LTS. Unfortunately, it seems that the latency to run a thread that has become runnable has significantly increased from the 2.6 kernel to the 3.2 kernel. In fact the latency numbers we are getting are hard to believe. Let me be more specific about the test. We have a program that has two threads. The first thread gets the current time (in ticks using RDTSC) and then signals a condition variable once a second. The second thread waits on the condition variable and wakes up when it is signaled. It then gets the current time (in ticks using RDTSC). The difference between the time in the second thread and the time in the first thread is computed and displayed on the console. After this the second thread waits on the condition variable once more. So, we get a thread to thread signaling latency measurement once a second as a result. In linux 2.6.32, this latency is somewhere on the order of 2.8-3.5 us, which is reasonable. In linux 3.2.0, this latency is somewhere on the order of 40-100 us. I have excluded any differences in hardware between the two host hosts. They run on identical hardware (dual socket X5687 {Westmere-EP} processors running at 3.6 GHz with hyperthreading, speedstep and all C states turned off). We are changing the affinity to run both threads on physical cores of the same socket (i.e., the first thread is run on Core 0 and the second thread is run on Core 1), so there is no bouncing of threads on cores or bouncing/communication between sockets. The only difference between the two hosts is that one is running Ubuntu 10.04 LTS with kernel 2.6.32-28 (the fast context switch box) and the other is running the latest Ubuntu 12.04 LTS with kernel 3.2.0-23 (the slow context switch box). Have there been any changes in the kernel that could account for this ridiculous slow down in how long it takes for a thread to be scheduled to run?

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• How do you keep down your urge to learn many things [closed]

  - by devsundar

  One of the difficulties i have is to lower my urge to learn new things (Languages, tools, frameworks etc.). I know it's good to stay the bleeding edge, but at the same time i want to learn things properly. I really see that i need to strike a balance between staying bleeding edge and knowing things properly. For example: Before choosing Arch (Desktop), Ubuntu(Server) and Knoppix(Portable) -- depending on situation -- as favourite distributions. Virtually i have tried all popular linux distributions. You name any popular linux (Redhat, Ubuntu, Arch, Suse, Knoppix, Slax, Slackware) i have tried it for some time. In fact i have spent few years experimenting the operating systems. Before choosing Python, Javascript (nodejs). I have tried all the languages i cameacross Scala, Haskell, Erlang, Ruby, Python, Perl, Scheme. Same applies for database. All popular db RDBMS (Oracle, Mysql, Postgres, SQLite[Favourite] etc) and NoSQL (Mongo, Couch, Neo4j etc.). Advantages i see: We get a overall picture of the technologies/tools/languages. It's useful to select the right tool for the job. We develop a taste and choose the One we like. Disadvantages: I feel that i spend somuch time and see a need to strike a balance. In summary, for e.g. If i see a blog post in HackerNews about CofeeScript i will try it out irrespective of what i am currently learning (Say Haskell). I switch back to learning Haskell, then again i see DART i check it out. And this continues.. Effectively i take more time to learn Haskell, but learnt about other new stuff on the way. The quetion i have is how do you strike a balance between staying bleeding edge and learning properly.

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• "Unmet Dependencies" problem when trying apt-get install

  - by GChorn

  Anytime I try to install python packages using the command: sudo apt-get install python-package I get the following output: Reading package lists... Done Building dependency tree Reading state information... Done You might want to run 'apt-get -f install' to correct these: The following packages have unmet dependencies: linux-headers-generic : Depends: linux-headers-3.2.0-36-generic but it is not going to be installed linux-headers-generic-pae : Depends: linux-headers-3.2.0-36-generic-pae but it is not going to be installed linux-image-generic : Depends: linux-image-3.2.0-36-generic but it is not going to be installed E: Unmet dependencies. Try 'apt-get -f install' with no packages (or specify a solution). This seems to have started when these same three packages showed up in Ubuntu's Update Manager and kicked an error when I tried to install them there. Based on the suggestion in the output above, I tried running: sudo apt-get -f install But this only gave me several instances of the following error: dpkg: error processing /var/cache/apt/archives/linux-image-3.2.0-36-generic_3.2.0-36.57_i386.deb (--unpack): unable to create `/lib/modules/3.2.0-36-generic/kernel/drivers/net/wireless/ath/carl9170/carl9170.ko.dpkg-new' (while processing `./lib/modules/3.2.0-36-generic/kernel/drivers/net/wireless/ath/carl9170/carl9170.ko'): No space left on device Now maybe I'm way off-base here, but I'm wondering if the error could be coming from the "No space left on device" part? The thing is, I'm running Ubuntu as a VirtualBox VM but I've got it set to dynamically increase its virtual hard drive space as needed, so why am I still getting this error? Here's my output when I use dh -f: Filesystem Size Used Avail Use% Mounted on /dev/sda1 6.9G 5.7G 869M 88% / udev 494M 4.0K 494M 1% /dev tmpfs 201M 784K 200M 1% /run none 5.0M 0 5.0M 0% /run/lock none 501M 76K 501M 1% /run/shm VB_Shared_Folder 466G 271G 195G 59% /media/sf_VB_Shared_Folder When I perform sudo apt-get -f install and the system says, After this operation, 192 MB of additional disk space will be used. Does that mean 192 MB of my virtual machine's current memory, or 192 MB on top of the rest of my free space? As I said, my machine normally dynamically allocates additional memory from the host machine, so I don't see why there would be memory restrictions at all...

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• How "commercially savvy" should software developers be? [closed]

  - by mattnz

  I have been watching answers to many questions on this site, and have come to the conclusion that commercial pragmatism does not factor into many software development discussions. As a result, I seriously wonder at the commercial skills within the industry, specifically the ability to deliver projects on time and to a budget. I see no indication from the site that commercially successful project delivery is a serious concern, yet the industry has a reputation for poor performance in this. Rarely, if ever, does the cost of time factor into discussions. I have never seen concepts such as opportunity cost, time to market, competitive advantage or cash flow mentioned, let alone discussed in technical answers to questions. How can you answer virtually any question without understanding the commercial background on which it is asked? Even Open source projects have a need to operate efficiently and deploy their limited resources to providing the most value for effort. Typically small start-ups have cash flow issues that outweigh longevity concerns, yet they are typically still advised to build for a future they probably won’t have if they do. Is it fair to say that these problems are solely the Managers and Project managers to solve, or are we, as developers, also responsible for ensuring successful on time, within budget delivery of projects, even if those budgets do not allow use to achieve engineering excellence?

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• How can i compare Audio, what programming language should i use

  - by Pimmetje

  I have 2 audio files that are from almost the same source. But at some points there shifted a bit. Also the codecs does not match. I would like to make a program that takes a sample 2 - 4 seconds. And looks for it in the other file. (Most of the time it's not shifted more than 30 seconds). Than take the time and store it, Go ahead for a few seconds take a sample and find it again. This way i want to create a file where i can see on what points the file is shifted. For people who are more interested in what i want. I have a audio/video file speech and subtitles. But i have same speech from different sources with differs a bit in time. And i like to make a program that can correct the subtitle time for me. Enough about the problem I looked on the Internet for ways to compare audio files. Based on what i read comparing 2 audio files isn't that easy as i had hoped. Some talk about algorithms http://www.perlmonks.org/?node_id=169641 Some audio-library's portaudio.com aubio.org sourceforge.net/projects/ccaudio/ ambiera.com/irrklang/ The biggest problem i have is that i can't find something i can generate from the audio that i can use to compare with. I hope someone here can point me in the right direction.

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• How do I get debuild to put the binary in /usr/bin?

  - by SammySP

  I have been recently trying to package a small Python utility to put on my PPA and I've almost got it to work, but I'm having problems in making the package install the binary (a chmod +x Python script) under /usr/bin. Instead it installs under /. I have this directory structure - http://db.tt/0KhIYQL. My package Makefile is like so: TARGET=usr/bin/txtrevise make: chmod +x $(TARGET) install: cp -r $(TARGET) $(DESTDIR) I've used $(DESTDIR), as I understand it to place the file under the debian subdir when debuild is run. I have the txtrevise script, my executable, under usr/bin folder under the root of my package. I also have the Makefile and usr/bin/textrevise in my tarball: txtrevise_1.1.original.tar.gz. However when I build this and look inside of the Debian package, txtrevise is always at the root of the package instead of under usr/bin and will be installed to / instead of /usr/bin. How can I get debuild to put the script in the right place? Thanks. Any help would be greatly appreciated. I'm stumped.

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