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  • Getting graduates up to speed?

    - by Simon
    This question got me thinking about how comapnies deal with newly-hired graduated. Do experienced programmers expect CS graduates to write clean code (by clean I mean code easily understandable by others — maybe that is too much to expect?) Or do significant portion of graduates at your place (if any) just end up testing and fixing small bugs on existing applications? And, even if they do bug fixes, do you end up spending double the amount of time just checking they did not end up breaking anything and creating new bugs? How do you deal with such scenarios when pair programming and code reviews are not available options (for reasons such as personal deadlines), and also what techniques did you find to get fresh graduate up to speed? Some suggestions would be great.

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  • What is Perl's relation to hackers? [closed]

    - by K.Steff
    I know Perl is a language revered by many hackers (as in hacker vs cracker) and respected by many good programmers for its expressiveness. I also realize it is useful to know and it's very handy at generalizing common Unix tasks (Unix here includes Linux and Cygwin). I also know that being a good hacker probably means you're a good programmer in general (references on this one are sparse around the web, but about everything Paul Graham has ever written seems approving of this statement to me). So my question is whether there is a reason that attracts hackers to Perl in particular? Will learing Perl improve my general programming, problem-solving and hacking skills if done properly? Does it present unique tools that are more useful to a hacker?

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  • What are some good examples of using pass by name?

    - by Paul
    When I write programs I using pass by value or pass by reference always seem to be logical methods. When learning about different programming languages I came across pass by name. Pass by name is a parameter passing method that waits to evaluate the parameter value until it is used. See Stack Overflow pass by name question for more information on the method. What I would like to know is: what are some good examples and/or reasons to use pass by name and should it be re-introduced into some more modern languages.

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  • Good resources for learning about graphics hardware

    - by Ken
    I'm looking for some good learning resources for graphics hardware (and associated low level software). Basically I want to learn more about what goes on underneath the opengl/direcx API layers in terms of how things are implemented. I familiar with what happens in principle during the various stages of the rendering pipeline (viewing, projection, clipping, rasterization etc). My goal is to be able to make better and more informed decisions about tradeoffs and potential optimisations when graphics/shader programming with respect to the following kinds of issues; batching view culling occlusions draw order avoiding state changes triangles vs pointsprites texture sampling etc Basically whatever the graphics programmer needs to know about modern graphics hardware in order to become more effective. I'm not really looking for specific optimisation techniques, rather I need more general knowledge so that I will naturally write more efficient code.

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  • Realtek RTL8168/8111E onboard NIC not recognized - the everlasting problem?

    - by Nikioko
    I used the newest vendor driver for my onboard NIC (board: ASUS M5A97 Pro) and those sites to get it running on kernel 3.0: http://www.twm-kd.com/linux/realtek-rtl81688111e-and-ubuntu-linux/ The problem now is, that this doesn't work with either kernel 3.1 or 3.2: https://code.google.com/p/r8168/issues/detail?id=6 My question is: does anyone have a solution to get it run on the newest kernel? Or is this a plaque I have to carry forever?

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  • How to solve linear recurrences involving two functions?

    - by Aditya Bahuguna
    Actually I came across a question in Dynamic Programming where we need to find the number of ways to tile a 2 X N area with tiles of given dimensions.. Here is the problem statement Now after a bit of recurrence solving I came out with these. F(n) = F(n-1) + F(n-2) + 2G(n-1), and G(n) = G(n-1) + F(n-1) I know how to solve LR model where one function is there.For large N as is the case in the above problem we can do the matrix exponentiation and achieve O(k^3log(N)) time where k is the minimum number such that for all km F(n) does not depend on F(n-k). The method of solving linear recurrence with matrix exponentiation as it is given in that blog. Now for the LR involving two functions can anyone suggest an approach feasible enough for large N.

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  • Ubuntu 12.04 Network Connection Unavailable

    - by user211315
    I recently added a EDIMAX EW-7811Un to my computer to allow wireless networking. That was working. Now after a reboot I am unable to connect to either wireless or wired network. the result of ifconfig is ifconfig eth0 Link encap:Ethernet HWaddr bc:ae:c5:46:19:6d inet6 addr: fe80::beae:c5ff:fe46:196d/64 Scope:Link UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1 RX packets:0 errors:0 dropped:0 overruns:0 frame:0 TX packets:231 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:1000 RX bytes:0 (0.0 B) TX bytes:62615 (62.6 KB) Interrupt:51 Base address:0x4000 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:16436 Metric:1 RX packets:664 errors:0 dropped:0 overruns:0 frame:0 TX packets:664 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:0 RX bytes:52639 (52.6 KB) TX bytes:52639 (52.6 KB) tun0 Link encap:UNSPEC HWaddr 00-00-00-00-00-00-00-00-00-00-00-00-00-00-00-00 inet addr:10.8.0.1 P-t-P:10.8.0.2 Mask:255.255.255.255 UP POINTOPOINT RUNNING NOARP MULTICAST MTU:1500 Metric:1 RX packets:0 errors:0 dropped:0 overruns:0 frame:0 TX packets:0 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:100 RX bytes:0 (0.0 B) TX bytes:0 (0.0 B)

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  • Why does Public Folder share prompt for password even after I set "Turn off password protected sharing"

    - by cmaduro
    I have a fileserver on a WORKGROUP which I have created a share on. I have turned on public folder sharing, file and printing sharing and set password protected sharing to off. When I try to share the folder by right clicking it and selecting proerties, then selecting sharing tab, then clicking the "share" button, then clicking share, it prompts me asking wether or not I want to turn on network discovery for public network, and after I say either yes or no, it says that my folder cant be shared. When I try to share via advanced sharing, then the folder is shared, and it's status is set to shared. However when I try to access this folder from a computer on the same network, it prompts me to enter a username and password. I am trying to setup a share for my VMware ThinApp packages that can be access no matter what domain the users are on.

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  • Wireless BMC4311 driver install

    - by user113910
    Exasperated with Ubuntu 12.04 and BCM4311 driver. HP2133 (was SUSE 10) Installed 12.04 in March. It ran well until November with no updates) then updates killed my wireless controller. Trolled forums & other for fix. Tried sudo -apt-get ing & gedit ing. Finally got it working (on full update with STA driver) Hwew!—thought that was it, only to fail again after 3-4 days. Tried all the fixes again but sudo -apt-get ing & gedit ing does not fix. I'm not without experience either: first 'boot-loader' I/P from 20 switch panel, seq to 4096 bit core-store: run to I/P larger processes from paper tape reader. Gone thru acoustic-coupled networks-to-billboards (before 'the net') pre-DOS, DOS, Windows 3.1 & all the others. This is a tough problem. Any advice?

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  • What language has the best/most library bindings?

    - by Rook
    A library binding allows a programming language to use a library written in another language. Most commonly you want to access a C library like libcurl from a language like PHP or Python. Not all bindings are created equally, for instance the libcurl binding for Python was abandoned almost 3 years ago and their sf.net bug tracker is overrun with unsolved problems. PHP on the other hand has very good libcurl bindings that are actively maintained. So here is my question: What language has the best and/or the most bindings?

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  • Why do I have to reconnect my usb router cable?

    - by Searock
    I have a Iball Baton ADSD2+ Router. It's working fine but the problem is when I boot into Ubuntu I have to unplug the usb cable and then plug it again, then it starts working. Why do I have to re connect my usb cable? Let me know if you need more details. Edit : I am using a direct connection. I mean to say I don't have to enter a username or password. I am connected to internet as soon as I start my router. The problem is if I start my router before my computer I have to re connect my usb cable. Thanks.

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  • What tools should I consider if my aim is to make a game available to as many platforms as possible?

    - by Kensai
    We're planning on developing a 2D, grid-based puzzle game, and although it's still very early in the planning stages, we'd like to make our decisions well from the beginning. Our strategy will be to make the game available to as many platforms as possible, for example PCs (Windows, Mac and/or Linux), mobile phones (iPhone and/or Android based phones), game consoles (XBLA and/or PSN) PC will have an emphasis, but I believe that's the most flexible platform so that shouldn't be a problem. So, what programming language, game engine, frameworks and all around tools would be best suited for our goal? P.S.: I'm betting a set of tools won't cover ALL of them, and that there will still be some kind of "translating" effort for some platforms, but we'd like to know what the most far reaching are.

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  • Disaster Recovery Example

    Previously, I use to work for a small internet company that sells dental plans online. Our primary focus concerning disaster prevention and recovery is on our corporate website and private intranet site. We had a multiphase disaster recovery plan that includes data redundancy, load balancing, and off-site monitoring. Data redundancy is a key aspect of our disaster recovery plan. The first phase of this is to replicate our data to multiple database servers and schedule daily backups of the databases that are stored off site. The next phase is the file replication of data amongst our web servers that are also backed up daily by our collocation. In addition to the files located on the server, files are also stored locally on development machines, and again backed up using version control software. Load balancing is another key aspect of our disaster recovery plan. Load balancing offers many benefits for our system, better performance, load distribution and increased availability. With our servers behind a load balancer our system has the ability to accept multiple requests simultaneously because the load is split between multiple servers. Plus if one server is slow or experiencing a failure the traffic is diverted amongst the other servers connected to the load balancer allowing the server to get back online. The final key to our disaster recovery plan is off-site monitoring that notifies all IT staff of any outages or errors on the main website encountered by the monitor. Messages are sent by email, voicemail, and SMS. According to Disasterrecovery.org, disaster recovery planning is the way companies successfully manage crises with minimal cost and effort and maximum speed compared to others that are forced to make decision out of desperation when disasters occur. In addition Sun Guard stated in 2009 that the first step in disaster recovery planning is to analyze company risks and factor in fixed costs for things like hardware, software, staffing and utilities, as well as indirect costs, such as floor space, power protection, physical and information security, and management. Also availability requirements need to be determined per application and system as well as the strategies for recovery.

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  • Map a drive to root of a server (\\sever) in Vista

    - by Andy T
    Hi, In Win XP, I can very easily map a network drive to the root of my NAS server. I browse to it in Explorer (\192.168.1.70), choose "Map Network Drive", choose the drive letter, done. In Vista, this does not seem possible. I have to go "Map Network Drive" from 'Computer', then enter the address, but it will only let me map to specific shares (sub-folders off of the server root) and NOT to the server root share. Since my NAS has built-in shares (music, photo, video, etc.) then I would have to have drive letters for all of these, which I absolutely don't want. Can anyone tell me - how come I can easily map to the server root from XP, but not in Vista? Is there something fundamentally different in the networking across the two OS's? Or do I just need to do things a different way? Hope someone can help. Thanks, AT

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  • Network print to brother MFC-7420

    - by trampster
    I am trying to pint to a Brother MFC-7420 from my ubuntu 10.04 machine. The brother is attached to a windows XP machine and is shared. This is what I have tried: System-Administration-Printing, Add, Expand Network Printer, Windows Printer via SAMBA, Browse (I can find the printer no problems here), Foward, Choose Driver Dialog, Brother, My printer is not in this list So the next thing I tried was to download the printer driver from here http://welcome.solutions.brother.com/bsc/public_s/id/linux/en/download_prn.html The driver installed fine but my printer still does not appear in the list. I also tried installing the cups wrapper but that gave the following error. Restarting Common Unix Printing System: cupsd [ OK ] cp: cannot stat `/usr/share/cups/model/MFC7420.ppd': No such file or directory dpkg: error processing cupswrappermfc7420 (--install): subprocess installed post-installation script returned error exit status 1 Errors were encountered while processing: cupswrappermfc7420 I tried connecting the printer directly but even though I have installed the driver, when I go to printers and click on the printer (it shows up fine as a USB printer) then it say searching for drivers and then gives me a list, this is the same list as before which doesn't have my printer. It really shouldn't be this hard. on window you don't have to installing anything it just works and the same is true for my brothers Mac. How do I print to my printer?

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  • Relation between " lines of the longest working program " in a language and familiarity with it?

    - by Tim
    In some computer master program online application, it says: Please list the programming languages in which you have written programs. For each language, indicate the length in lines of the longest working program you have written in that language. You may approximate, but only count those parts of the program that you wrote yourself. I don't quite remember that, and I have never counted the lines of each program. Do programmers always know approximately how many lines in each of his programs, and keep record of them? What is the relation between " lines of the longest working program " in a language and familiarity with it? Typically, how many lines will indicate the programmer being excellent, good, fair, or unfamiliar with the language? Is knowing "lines of the longest working program" really helpful?

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  • Turning my mobile boardband into Wifi with my laptop using Kubuntu 12.04 to use it in my desktop PC

    - by Suhail cholassery
    Its been 3 or 4 months since I started using 12.04. What I want to do is very clear: Turn my mobile broadband connection into Wifi connection with my laptop using Kubuntu 12.04 to use it in my desktop PC. I browsed through most of the questions related to this (ad- hoc connections, bridging mobile broadband with Wifi, etc). I also read the ICS article, but I found those too difficult to digest. I hope that there is some other way to do this. I request you to give me a practical and applicable answer . I am not trying duplicate any other existing question.

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  • NetworkManager doesn't detect my broadband device

    - by Joril
    I have a Huawei K3765 (USB ID 12D1:1520) and I'm trying to use it with Ubuntu 10.04 Lucid. I have usb-modeswitch installed, so when I plug the device I can see that it gets switched from storage-mode to modem-mode. My problem is that when I try to create a broadband mobile connection for it, NetworkManager doesn't detect the modem... I tried this on two different laptops. /var/log/daemon.log doesn't show anything of interest, AFAIKT... What could I try?

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  • Why is Prolog associated with Natural Language Processing?

    - by kyphos
    I have recently started learning about NLP with python, and NLP seems to be based mostly on statistics/machine-learning. What does a logic programming language bring to the table with respect to NLP? Is the declarative nature of prolog used to define grammars? Is it used to define associations between words? That is, somehow mine logical relationships between words (this I imagine would be pretty hard to do)? Any examples of what prolog uniquely brings to NLP would be highly appreciated.

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  • Button "Add" is disabled in VPN Connection's dialog

    - by Innuendo
    I've just installed elementaryos-jupiter. (It's based on Ubuntu 10.10) I've entered VPN Connections' menu (nm - VPN Connections - Configure VPN) And there should be button "Add" - it is, but it's disabled (I can't press on it) I'm connecting via ethernet (LAN in a students' hostel) and we get internet via VPN connection (It worked for me in Ubuntu for a few years) Any suggestions? I've asked on IRC of elementaryos (there were few people) but they said that VPN is out-of-box, and it should work - they never met this.

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  • Best language for crossplatform app with GUI [on hold]

    - by Jeremy Dicaire
    I've decided to finally get rid of all Microsoft crap and switched to linux yesterday (It feels so good!) I'm looking for a way to create a cross-platform app with a GUI using an open-source language. I came across python with qt4 (or qt5). I give a thought to Java but it's a memory eater... I'm wondering which other good options is available before starting my journey with those 2 and which tools are good to help me code. I'm currently using Eclipse for all my programming needs. Your help is appreciated! Have a nice day

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  • java developer who wants to raise skill level for better career growth [closed]

    - by Rahul Shivsharan
    I have an experience in Java language and in JEE related Framework for about 5 years. In these 5 years i have worked on Core java, Spring, Hibernate, JPA, Struts 1. Now just to be prepared for the near future, i am thinking to learn some new programming language or some new technology, this will help me out to be a more elligible employee. So my question to you is, which new technology or language should i learn, my target is for next 3 years. So just in case if Java fades out (thought it won't) than i can jump on to this newly learned stuff. Where should i start from ? Should i learn some other language in JVM like Scala, Clojure, Groovy, JRuby ? Or should i learn some altogether different language like Python or Erlang, Perl ? Or new technology which is related to NoSQL, like MongoDB, Hadoop, CouchDB. Or learn few current happening things in market like RoR, Node.js, LessCss or Sass, Coffee Script ? Can anybody give me some hint,

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  • C# on ubuntu 12.04

    - by Deus Deceit
    Is C# a good choice for ubuntu programming? E.g unity, or applications that will run on ubuntu? Am I doing good wanting to learn C# when I'm determined to stick with ubuntu and develop on it or for it? If not, can you give me reasons why? And which languages would be better than c# for ubuntu development? I already know c, c++, java(basics), php, mysql, python(basics). I like to learn new stuff, but stuff that worth my time. Does C# worth my time? If c# worth my time, here's what I have done and what I need: I installed all mono packages I could find on the ubuntu standard repositories. Now I want a good tutorial to get me started. I'm a complete noob with c# so a basic tutorial and how to compile run under ubuntu 12.04 would be great.

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  • Cannot establish ssh connection to computer on local network

    - by ovangle
    I've just (re)installed ubuntu 11.10 on my main pc, and the connection times out every time I try to ssh connect to my laptop (over the local network) to retrieve the files I backed up there. The connection times out every time I try to connect. I can establish a connection in the other direction without issue. Here's the verbose output I get when I try to connect: ovangle@ruby-EP43-DS3:~$ ssh -v [email protected] OpenSSH_5.8p1 Debian-7ubuntu1, OpenSSL 1.0.0e 6 Sep 2011 debug1: Reading configuration data /etc/ssh/ssh_config debug1: Applying options for * debug2: ssh_connect: needpriv 0 debug1: Connecting to 10.1.1.4 [10.1.1.4] port 22. debug1: connect to address 10.1.1.4 port 22: Connection timed out ssh: connect to host 10.1.1.4 port 22: Connection timed out ssh is installed on both machines, and I've tried deleting '~/.ssh/known_hosts' on both machines, still nada. I've changed the sshd logging on the laptop to VERBOSE and restarted the daemon (because I wasn't getting any relevant syslog entries otherwise), and this is the log for the most recent connection attempt. EDIT: posted wrong logs last time. They just showed that there was a connection received, they weren't actually the sshd logs (which were in auth.log as I recently discovered). Unfortunately, that log is filling up with extremely weird error messages and it gives me no information about the connection. Nov 8 16:02:18 ovangle-A6Rp pkexec: pam_unix(polkit-1:session): session opened for user root by (uid=1000) Nov 8 16:02:18 ovangle-A6Rp pkexec: pam_ck_connector(polkit-1:session): cannot determine display-device Nov 8 16:02:18 ovangle-A6Rp pkexec[6270]: ovangle: Executing command [USER=root] [TTY=unknown] [CWD=/home/ovangle] [COMMAND=/usr/sbin/gnome-power-backlight-helper --set-brightness 2] Nov 8 16:02:19 ovangle-A6Rp pkexec: pam_unix(polkit-1:session): session opened for user root by (uid=1000) Nov 8 16:02:19 ovangle-A6Rp pkexec: pam_ck_connector(polkit-1:session): cannot determine display-device Nov 8 16:02:19 ovangle-A6Rp pkexec[6273]: ovangle: Executing command [USER=root] [TTY=unknown] [CWD=/home/ovangle] [COMMAND=/usr/sbin/gnome-power-backlight-helper --set-brightness 7]

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  • Movement prediction for non-shooters

    - by ShadowChaser
    I'm working on an isometric (2D) game with moderate-scale multiplayer - 20-30 players. I've had some difficulty getting a good movement prediction implementation in place. Right now, clients are authoritative for their own position. The server performs validation and broad-scale cheat detection, and I fully realize that the system will never be fully robust against cheating. However, the performance and implementation tradeoffs work well for me right now. Given that I'm dealing with sprite graphics, the game has 8 defined directions rather than free movement. Whenever the player changes their direction or speed (walk, run, stop), a "true" 3D velocity is set on the entity and a packet it sent to the server with the new movement state. In addition, every 250ms additional packets are transmitted with the player's current position for state updates on the server as well as for client prediction. After the server validates the packet, it gets automatically distributed to all of the other "nearby" players. Client-side, all entities with non-zero velocity (ie/ moving entities) are tracked and updated by a rudimentary "physics" system - basically nothing more than changing the position by the velocity according to the elapsed time slice (40ms or so). What I'm struggling with is how to implement clean movement prediction. I have the nagging suspicion that I've made a design mistake somewhere. I've been over the Unreal, Half-life, and all other movement prediction/lag compensation articles I could find, but they all seam geared toward shooters: "Don't send each control change, send updates every 120ms, server is authoritative, client predicts, etc". Unfortunately, that style of design won't work well for me - there's no 3D environment so each individual state change is important. 1) Most of the samples I saw tightly couple movement prediction right into the entities themselves. For example, storing the previous state along with the current state. I'd like to avoid that and keep entities with their "current state" only. Is there a better way to handle this? 2) What should happen when the player stops? I can't interpolate to the correct position, since they might need to walk backwards or another strange direction if their position is too far ahead. 3) What should happen when entities collide? If the current player collides with something, the answer is simple - just stop the player from moving. But what happens if two entities take up the same space on the server? What if the local prediction causes a remote entity to collide with the player or another entity - do I stop them as well? If the prediction had the misfortune of sticking them in front of a wall that the player has gone around, the prediction will never be able to compensate and once the error gets to high the entity will snap to the new position.

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