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  • What is your best programmer joke?

    - by hmason
    When I teach introductory computer science courses, I like to lighten the mood with some humor. Having a sense of fun about the material makes it less frustrating and more memorable, and it's even motivating if the joke requires some technical understanding to 'get it'! I'll start off with a couple of my favorites: Q: How do you tell an introverted computer scientist from an extroverted computer scientist? A: An extroverted computer scientist looks at your shoes when he talks to you. And the classic: Q: Why do programmers always mix up Halloween and Christmas? A: Because Oct 31 == Dec 25! I'm always looking for more of these, and I can't think of a better group of people to ask. What are your best programmer/computer science/programming jokes?

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  • Practical differences between OpenBSD and FreeBSD?

    - by simon
    I have OpenBSD installed as a router/firewall, and have been thinking about trying either OpenBSD or FreeBSD out as a desktop system, as well. What kind of practical differences (not philosophical, like "OpenBSD's focus is security" [those are well explained at wikipedia ) are there between FreeBSD and OpenBSD? E.g. default shell, different commands or ways of configuring things etc.?

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  • Practical uses for PS3 linux? [closed]

    - by NoCarrier
    I've got a PS3 sitting around that i don't use much because I a. don't have time for games b. don't have time for movies (bluray, dvd, and otherwise) So I'm considering loading some flavor of linux onto it. Besides the gee-whiz-but-does-it-run-linux factor, can anyone suggest any practical uses for doing so?

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  • Give me a practical use-case of Multi-set

    - by Calm Storm
    I would like to know a few practical use-cases (if they are not related/tied to any programming language it will be better).I can associate Sets, Lists and Maps to practical use cases. For example if you wanted a glossary of a book where terms that you want are listed alphabetically and a location/page number is the value, you would use the collection TreeMap(OrderedMap which is a Map) Somehow, I can't associate MultiSets with any "practical" usecase. Does someone know of any uses? http://en.wikipedia.org/wiki/Multiset does not tell me enough :) PS: If you guys think this should be community-wiki'ed it is okay. The only reason I did not do it was "There is a clear objective way to answer this question".

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  • Is email encryption practical enough?

    - by Dimitri C.
    All emails I have ever sent were sent as plain text. Like postcards, everybody on the way to the addressee could easily read and store them. This worries me. I know privacy is something of the past, but encrypting email is possible, at least in theory. However, I wonder whether it is practical enough. Is there anybody who has experience with email security? Is it easy to set up? And can you still send and receive email from all you friends and acquaintances?

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  • Practical RAID Performance?

    - by wag2639
    I've always thought the following to be a general rule of thumb for RAID: RAID 0: Best performance for READ and WRITE from stripping, greatest risk RAID 1: Redundant, decent for READ (I believe it can read from different parts of a file from different hard drives), not the best for WRITE RAID 0+1 (01): combines redundancy of RAID 1 with performance of RAID 0 RAID 1+0 (10): slightly better version of RAID 0+1 RAID 5: good READ performance, bad WRITE performance, redundant IS THIS ASSUMPTION CORRECT? (and how do they compare to a JBOD setup for R/W IO performance) Are certain practical RAID setups better for different applications: gaming, video editing, database (Acccess or SQL)? I was thinking about hard disk drives but does this apply to solid state drives as well?

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  • T-SQL Jokes

    - by Tomaz.tsql
    SQL Table walks to a psychiatrist dr. Index Table: "Doctor, I have a problem" Dr: "what kind a problem?" Table: "I'm a mess. I have things all over the place, i always look for my stuff" Dr. "No problem. I will get you in order". Index and table are reading a book "index-sutra" Table: Oh, baby tonight we can try a clustered position" Index: "yeah baby, we can also try covered position" Table: "or maybe multiple clustered position"...(read more)

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  • Getting my head around the practical applications of strong and weak pointers in Objective-C

    - by Chris Wilson
    I've just read the accepted excellent answer to this question that clarifies the conceptual differences between strong and weak pointers in Objective-C, and I'm still trying to understand the practical differences. I come from a C++ background where these concepts don't exist, and I'm having trouble figuring out where I would use one vs the other. Could someone please provide a practical example, using Objective-C code, that illustrates the different uses of strong and weak pointers?

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  • Mercurial for Beginners: The Definitive Practical Guide

    - by Laz
    Inspired by Git for beginners: The definitive practical guide. This is a compilation of information on using Mercurial for beginners for practical use. Beginner - a programmer who has touched source control without understanding it very well. Practical - covering situations that the majority of users often encounter - creating a repository, branching, merging, pulling/pushing from/to a remote repository, etc. Notes: Explain how to get something done rather than how something is implemented. Deal with one question per answer. Answer clearly and as concisely as possible. Edit/extend an existing answer rather than create a new answer on the same topic. Please provide a link to the the Mercurial wiki or the HG Book for people who want to learn more. Questions: Installation/Setup How to install Mercurial? How to set up Mercurial? How do you create a new project/repository? How do you configure it to ignore files? Working with the code How do you get the latest code? How do you check out code? How do you commit changes? How do you see what's uncommitted, or the status of your current codebase? How do you destroy unwanted commits? How do you compare two revisions of a file, or your current file and a previous revision? How do you see the history of revisions to a file? How do you handle binary files (visio docs, for instance, or compiler environments)? How do you merge files changed at the "same time"? Tagging, branching, releases, baselines How do you 'mark' 'tag' or 'release' a particular set of revisions for a particular set of files so you can always pull that one later? How do you pull a particular 'release'? How do you branch? How do you merge branches? How do you merge parts of one branch into another branch? Other Good GUI/IDE plugin for Mercurial? Advantages/disadvantages? Any other common tasks a beginner should know? How do I interface with Subversion? Other Mercurial references Mercurial: The Definitive Guide Mercurial Wiki Meet Mercurial | Peepcode Screencast

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  • SaaS practical basics and projects

    - by Medardas
    So i need some directions. I want to understand Cloud Software as a Service(SaaS) practical initialization. The thing is I want to create a simple cloud service which would let me run programs on this cloud from remote machine. As I understand, I need some kind of specific backbone project to start this system, similar like OpenStack or Apache Cloud for Infostructure as a Service. Of course it may be that I understand it completely wrong and even if there is such project, it is not open source, free. I could also comprehend SaaS building on IaaS, but the thing is, I can't find any practical information at all. Could Somebody indulge me if there is any kind of free licence SaaS project or recommend a related articles or explain everything in a nut case with atleast vague direction.

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  • How do I know what Version of BizTalk is on my server?

    - by Paula DiTallo
    Originally posted on: http://geekswithblogs.net/AskPaula/archive/2013/07/02/153324.aspxThere are 2 ways to do this, the first is to query the BizTalkDBVersion table:use [BizTalkMgmtDb]goSELECT DatabaseMajor, DatabaseMinor,ProductBuildNumber, ProductRevision FROM dbo.BizTalkDBVersion;  Here is a list of possible BizTalk versions (CUP = cumulative update package, SP = service pack) :BTS20043.0.4902.0BTS2004SP13.0.6070.0BTS2004SP2 3.0.7405.0BTS2006 3.5.1602.0BTS2006R23.6.1404.0BTS20093.8.368.0BTS2010    3.9.469.0BTS2010CUP13.9.522.2BTS2010CUP23.9.530.2BTS2010CUP33.9.542.2BTS2010CUP43.9.545.2BTS2010CUP53.9.556.2BTS2013    3.10.229.0The second way is to follow these steps:Click Start, click Run, type regedt32, and then click OK.Once the window is up, navigate to  HKEY_LOCAL_MACHINE,  then SOFTWARE, then Microsoft, then BizTalk Server, and finally open 3.0.This is what you should see:

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  • Is sticking to one language a good practice?

    - by Ans
    I'm developing a pipeline for processing text that will go into production. The question I keep asking myself is: should I stick to one language when looking for a tool to do a particular task (e.g. NLTK, PDFMiner, CLD, CRFsuite, etc.)? Or is it OK to mix and match looking for the best tool regardless of what language it's written in (e.g. OpenNLP, ParsCit, poppler, CFR++, etc.) and warp my code around them?

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  • SQL Server: How do I generate the table schema and populate it with inserts in a script?

    - by Paula DiTallo
    Originally posted on: http://geekswithblogs.net/AskPaula/archive/2014/05/20/156469.aspx In SSMS, there's a Generate Script utility (read:  only available under version 2008 and up) . Here are the steps you would need to take to make use of the utility: Right click on the database you're interested in and go to Tasks -> Generate ScriptsSelect the tables and/or any other objects you'd like in order to get them into the script.Navigate to Set scripting options. Click on Advanced.Under the General category, navigate to Type of data to scriptSelect the Schema and Data option to get the insert statements generated. Click OK.

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  • Best Practical RT, sorting email into queues automatically using procmail

    - by user52095
    I'm trying to get incoming e-mail to automatically go directly into whichever queue/ticket they are related to or create a new one if none exist and the right queue e-mail setup in the web interface is used. I will have too many queues to have two line items within mailgate per queue. A similar issue was discussed here (http://serverfault.com/questions/104779/procmail-pipe-to-program-otherwise-return-error-to-sender), but I thought it best to open a new case instead of tagging on what appeared to be an answer to that person's query. I'm able to send and receive e-mail (via PostFix) to the default rt user and this user successfully accepts all e-mail for the relative domain. I have no idea where the e-mail goes - it's successfully delivered, but it does not update existing tickets (with a Subject line match) and it does not create any new. Here's and example of my ./procmail.log: procmail: [23048] Mon Aug 23 14:26:01 2010 procmail: Assigning "MAILDOMAIN=rt.mydomain.com " procmail: Assigning "RT_MAILGATE=/opt/rt3/bin/rt-mailgate " procmail: Assigning "RT_URL=http://rt.mydomain.com/ " procmail: Assigning "LOGABSTRACT=all " procmail: Skipped " " procmail: Skipped " " procmail: Assigning "LASTFOLDER={ " procmail: Opening "{ " procmail: Acquiring kernel-lock procmail: Notified comsat: "rt@18337:./{ " From [email protected] Mon Aug 23 14:26:01 2010 Subject: RE: [RT.mydomain.com #1] Test Ticket Folder: { 1616 Does the notified comsat portion mean that it notified RT? The contents of my ./procmailrc: #Preliminaries SHELL=/bin/sh #Use the Bourne shell (check your path!) #MAILDIR=${HOME} #First check what your mail directory is! MAILDIR="/var/mail/rt/" LOGFILE="home/rt//procmail.log" LOG="--- Logging ${LOGFILE} for ${LOGNAME}, " VERBOSE=yes MAILDOMAIN="rt.mydomain.com" RT_MAILGATE="/opt/rt3/bin/rt-mailgate" #RT_MAILGATE="/usr/local/bin/rt-mailgate" RT_URL="http://rt.mydomain.com/" LOGABSTRACT=all :0 { # the following line extracts the recipient from Received-headers. # Simply using the To: does not work, as tickets are often created # by sending a CC/BCC to RT TO=`formail -c -xReceived: |grep $MAILDOMAIN |sed -e 's/.*for *<*\(.*\)>* *;.*$/\1/'` QUEUE=`echo $TO| $HOME/get_queue.pl` ACTION=`echo $TO| $HOME/get_action.pl` :0 h b w |/usr/bin/perl $RT_MAILGATE --queue $QUEUE --action $ACTION --url $RT_URL } I know that my get_queue.pl and get_action.pl scripts work, as those have been previously tested. Any help and/or guidance you can give would be greatly appreciated. Nicôle

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  • Domain Controller DNS Best Practice/Practical Considerations for Domain Controllers in Child Domains

    - by joeqwerty
    I'm setting up several child domains in an existing Active Directory forest and I'm looking for some conventional wisdom/best practice guidance for configuring both DNS client settings on the child domain controllers and for the DNS zone replication scope. Assuming a single domain controller in each domain and assuming that each DC is also the DNS server for the domain (for simplicity's sake) should the child domain controller point to itself for DNS only or should it point to some combination (primary VS. secondary) of itself and the DNS server in the parent or root domain? If a parentchildgrandchild domain hierarchy exists (with a contiguous DNS namespace) how should DNS be configured on the grandchild DC? Regarding the DNS zone replication scope, if storing each domain's DNS zone on all DNS servers in the domain then I'm assuming a DNS delegation from the parent to the child needs to exist and that a forwarder from the child to the parent needs to exist. With a parentchildgrandchild domain hierarchy then does each child forward to the direct parent for the direct parent's zone or to the root zone? Does the delegation occur at the direct parent zone or from the root zone? If storing all DNS zones on all DNS servers in the forest does it make the above questions regarding the replication scope moot? Does the replication scope have some bearing on the DNS client settings on each DC?

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  • Practical tips when transitioning to xmonad?

    - by meder
    I like the idea and concept of xmonad, however I still keep going back to gnome after an hour or so. This feels like when I first tried to learn vim, but I've gotten past the learning curve point and can't live without vim nowadays. I'm sure the time will come for xmonad too, but I was wondering if current xmonad users can provide transitional tips? FYI, I'm on dual monitors ( 19 inch and 17 inch ). Example of an issue I'm having while in this "transitional" stage: How do you manage keeping the browser and other programs that are most commonly used in full screen mode, since by default I think it opens up in a small tile that takes up a portion of the screen? Do you just shortcut it to make it open full screen, or do you actually not maximize it? Or are there advanced methods through preferences in the conf file, making certain programs take up X space?

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  • Practical way to implement prevention of IP Spoofing

    - by user1369975
    I am an undergraduate Computer Science student and was hoping to gain some knowledge of ways to help prevent IP spoofing but all the resources I have tried out elaborate this concept in a theoretical way. I want to try out my hands at one of the techniques like: http://en.wikipedia.org/wiki/Port_knocking http://en.wikipedia.org/wiki/SYN_cookies How do I simulate this whole situation in my own system were I myself am the attacker and I myself have to defend it? And once I have gained an understanding of it, then how do I start translating that into programming terms?

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  • Practical approach to concurrency control

    - by Industrial
    Hi everyone, I'd read this article recently and are very interested on how to make a practical approach to Concurrency control on a web server. The server will run CentOS + PHP + mySQL with Memcached. How would you set it up to work? http://saasinterrupted.com/2010/02/05/high-availability-principle-concurrency-control/ Thanks!

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  • Practical Uses of Fractals in Programming

    - by Sami
    Fractals have always been a bit of a mystery for me. What practical uses (beyond rendering to beautiful images) are there for fractals in the various programming problem domains? And please, don't just list areas that use them. I'm interested in specific algorithms and how fractals are used with those algorithms to solve something in practice. Please at least give a short description of the algorithm.

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  • Practical ways around the GPL?

    - by Daniel
    My company makes an extremely specialized piece of software which costs a lot of money for those few who need it. On our current release we have no choice but to use a few libraries which are released only under the GPL. Releasing the code is not an option and it would take months, if not years to implement the functionality the libraries provide. What do companies do in this situation? Are there practical and legal ways around the GPL?

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  • Learning functional/clojure programming - practical excersises?

    - by Konrad Garus
    I'm learning functional programming with Clojure. What practical excersises can you recommend? Online repositories with solutions would be perfect. One idea I can think of is going through all the popular algorithms on sorting, trees, graphs etc. and implementing them in Clojure myself. While it could work, it may be pretty steep and I'm likely to do it inefficiently (compared to someone who knows what she's doing).

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  • Practical examples of using symbols in Scala?

    - by Jesper
    Scala has symbols - names that start with a single quote ' and which are a kind of string constants. I know symbols from Ruby (where they start with a colon). In Ruby they are used for some meta-programming tasks, like generating getters and setters for member variables (for example attr_reader :name to generate a getter for name). I haven't seen a lot of use of symbols in Scala code yet. What are practical uses for symbols in Scala?

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