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• Is there a term for "Use procedures that execute a single task"?

  - by Tom

  I'm having a discussion with a fellow developer, and I'm trying to argument this in something like a short "term". SoC (Separation of Concerns) is pretty straight forward design practice, but it dwells deeper. If we want to pick on it's deep corners, we can Google it and there are plenty of articles that pop up, and after taking a glimpse, we know a lot more, and might find some examples. But, what about "Use procedures that execute a single task"? That's also a great design principle to use when writing applications and it becomes more and more rewarding, the larger the application gets. Is there a term for Use procedures that execute a single task?

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• Is it bad practice to use the same name for arguments and members?

  - by stijn

  Sometimes I write constructor code like class X { public: X( const int numberOfThingsToDo ) : numberOfThingsToDo( numberOfThingsToDo ) { } private: int numberOfThingsToDo; }; or in C# class X { public X( int numberOfThingsToDo ) { this.numberOfThingsToDo = numberOfThingsToDo; } private int numberOfThingsToDo; } I think the main reason is that when I come up with a suitable member name, I see no reason to use a different one for the argument initializing it, and since I'm also no fan of using underscores the easiest is just to pick the same name. After all it's suitable. Is this considered bad practice however? Any drawbacks (apart from shooting yourself in the foot when forgetting the this in C#)?

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• What happens after `ubuntu-bug` has done it's thing?

  - by guntbert

  Until some time ago you ran apport-bug or ubuntu-bug to start reporting a bug. The system would then open launchpad with your account, upload the collected information and let you add more info to the bug report. Now when I run gksudo ubuntu-bug (for instance with a crash-file as argument) the common bug dialog appears and thats all. Where is the report being sent to? Definitely not to launchpad as a bug report (although in the concrete situation people have been able to file a report about that bug). So: where is this report sent to (and just maybe) how can I still file a bug report from my system (makes uploading of the pertaining files much easier) Could it be that "the system" decided that this would be a duplicate of an already existing bug?

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• 12.04 BCM4312 and aireplay-ng/airodump-ng

  - by Haxornator

  First off, I've read through all of the posts regarding BCM4312 on the forums but haven't been able to get any help. Basically I have a Dell Inspiron 1564 which I've installed 12.04 on and for the most part everything works fine but now that I'm trying to use more in depth utilities such as aireplay and airodump I'm coming across what I believe to be a driver problem thats not allowing compatibility for these programs. Does anyone out there have any suggestions how to resolve this? This is the error I receive: root@Haxornator:~/aircrack/aircrack-ng-1.1# airodump-ng eth2 ioctl(SIOCSIWMODE) failed: Invalid argument ARP linktype is set to 1 (Ethernet) - expected ARPHRD_IEEE80211, ARPHRD_IEEE80211_FULL or ARPHRD_IEEE80211_PRISM instead. Make sure RFMON is enabled: run 'airmon-ng start eth2 <#' Sysfs injection support was not found either.

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• What's the best way to version CSS and JS URLs?

  - by David Eyk

  As per Yahoo's much-ballyhooed Best Practices for Speeding Up Your Site, we serve up static content from a CDN using far-future cache expiration headers. Of course, we need to occasionally update these "static" files, so we currently add an infix version as part of the filename (based on the SHA1 sum of the file contents). Thus: styles.min.css Becomes: styles.min.abcd1234.css However, managing the versioned files can become tedious, and I was wondering if a GET argument notation might be cleaner and better: styles.min.css?v=abcd1234 Which do you use, and why? Are there browser- or proxy/cache-related considerations that I should consider?

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• Doubts regarding the behaviour of 'autoremove' command and '--auto-remove' flag

  - by Jasper Loy

  After reading several man pages and forums, I thought that running 'apt-get autoremove' without any following argument removes all unused dependencies left on the system, while running 'apt-get autoremove xxx' removes xxx together with its unused dependencies. However I found this to be not true. Running 'apt-get autoremove xxx' not only removes xxx together with its unused dependencies, it also removes all other unused dependencies. So I tried to run 'apt-get remove --auto-remove xxx', thinking that this would remove only xxx and its unused dependencies. To my surprise, this also removed xxx, its unused dependencies and all other unused dependencies. Is this the intended behaviour of the commands or a bug? Is there any quick way to remove xxx and its unused dependencies without removing other unused dependencies?

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• ffmpeg: cut multiple input files with seeking to one output file

  - by Josef Kufner

  I have list of video files (loaded from database), each with start and end time of requested interval: # file begin end v1.mp4 1:01 2:01 v2.mp4 3:02 3:32 v3.mp4 2:03 5:23 And I need to create single video file containing these intervals: [0:00]---v1---[2:00]---v2---[2:30]---v3---[5:50] I preffer usig ffmpeg, since it is installed on server. Caller program is written in PHP. It is easy to cut one input to one output (argument escaping removed for clarity): exec("ffmpeg -ss $begin -i $input_file -ss $begin -c copy $output_file"); I there any easier way than executing ffmpeg for each interval and then execute it once more to concatenate prepared clips together? I really do not like to have a lot of temporary files or dealing with complex process handling.

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• How does Requiring users to Periodically Change their Passwords Improve Security? [closed]

  - by Bob Kaufman

  I've had the same password for some sites for years with no regrets. Meanwhile, at work, I find myself being forced to change passwords every two to three months. My thinking is that if a password gets compromised, requiring that I change it several weeks out isn't going to protect me or the network very much. Moreover, I find that by being required to change passwords frequently, I degenerate into a predictable password pattern (e.g., BearsFan111, BearsFan222, ...) which results in easier to remember and easier to guess passwords. Is there a sound argument for requiring that passwords be changed periodically?

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• What do you think about gems and eggs? Alternatives?

  - by Juanlu001

  I've read recently some criticism (see 1, 2, 3) about the packaging distribution system of two popular programming languages: Ruby gems and Python eggs. The most important argument stated against them is that they replace the system package manager (in case there is one, as in every Linux distribution), which makes eggs and gems difficult to track, code difficult to patch, and so on. Are actually eggs and gems right? In case not, are there any alternatives to distributing Python or Ruby modules? Should developers focus on taking advantage of package manager (apt-get, pacman, ...) capabilities?

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• Allow any arguments for a given command with sudo

  - by Mark L

  I have the following sudo config entry which I added via sudo visudo: mark ALL = NOPASSWD: /usr/bin/lxc-ls* I can run lxc-ls with my user fine but I can't append any parameters without it demanding I prefix the command with sudo. $ whoami mark $ lxc-ls test-container $ lxc-ls --fancy lxc-ls: error: You must be root to access advanced container properties. Try running: sudo /usr/bin/lxc-ls Any idea how I can edit via sudo visudo to allow for any argument after the command? I don't want to prefix the command with sudo as I'm using a python library to execute the command and it's being funny about sudo prefixes.

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• Does approaching SICP in clojure have a high chance of success? [on hold]

  - by ironicaldiction

  I am a third year bachelor student in a software engineering program, and I brought up the idea of reading SICP to an adviser to gain a deeper and more fundamental understanding of the principles behind all this software we engineer. He suggested not to learn scheme to complete the book (because it's not as common as modern dialects of lisp) but to do the exercises in clojure instead. My worry is that completing exercises in clojure instead of scheme will make an already difficult book tortuous. If I do attempt the book's exercises in the more modern clojure, will it be difficult to succeed (for example, because I can't find any real solutions, the syntax they teach for scheme is different, etc.), or do you think approaching the book in clojure could be just as successful as approaching it in scheme? I'm really not knowledgeable enough about either clojure or scheme to make an argument about this, so I wanted to know if I should bring it up or not.

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• Fixed Bid vs. T&amp;M &ndash; Take 2

  - by AjarnMark

  One of my most popular blog entries of all time is my Contracting Tips: Fixed Bid vs. T&M post from January, 2004.  This post consistently shows up in my referrers list, usually coming from a search engine.  Recently, Brent Ozar (@BrentO) wrote a great argument for why he always bills by the hour (a.k.a. Time & Materials or T&M) which itself was a response to Mark Richman’s (@mrichman) post on why he never bills by the hour (fixed bid).  Each article has good arguments, and I encourage you to read them both and choose the best approach for you. As for me, my experience parallels Brent’s and I historically have leaned toward the Time & Materials model.

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• Does anyone prefer proportional fonts?

  - by Jason Baker

  I was reading the wikipedia article on programming style and noticed something in an argument against vertically aligned code: Reliance on mono-spaced font; tabular formatting assumes that the editor uses a fixed-width font. Most modern code editors support proportional fonts, and the programmer may prefer to use a proportional font for readability. To be honest, I don't think I've ever met a programmer who preferred a proportional font. Nor can I think of any really good reasons for using them. Why would someone prefer a proportional font?

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• navigation menus and SEO

  - by Rodolfo

  I've always have my doubts about navigation menus effect on SEO. You know, the vertical menus on the top that show in every page in the site linking to main sections and subsections. My issue is that if not done dynamically (i.e. after page is loaded or something), from a search engine's point of view it probably looks like a whole bunch of links in the beginning of the page, and links that probably have nothing to do with the page being analyzed, so it's probably not only confusing it, but also giving link 'juice' to the wrong pages or reducing its value. When I've asked SEO people about this, I usually get a "Google is smart, they'll recognize it as a menu and ignore it" response, but I'm not convinced (and the 'Google is smart' argument sounds almost like religion discussion to me). So does it affect SEO negatively or not? Are there any official posts on this topic?

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• How do i use latest Pulseaudio in 11.10?

  - by YumYumYum

  Ubuntu 11.04 i had pulseaudio from source compiled and i used it to learn, it always worked (git versions). But since i have Ubuntu 11.10, i can install it but i can not use it anymore like i do in 11.04 before. Everytime i play something its throwing this: $ speaker-test speaker-test 1.0.24.2 Playback device is default Stream parameters are 48000Hz, S16_LE, 1 channels Using 16 octaves of pink noise Rate set to 48000Hz (requested 48000Hz) Buffer size range from 192 to 2097152 Period size range from 64 to 699051 Using max buffer size 2097152 Periods = 4 ALSA lib pcm_pulse.c:746:(pulse_prepare) PulseAudio: Unable to create stream: Invalid argument Unable to set hw params for playback: Input/output error Setting of hwparams failed: Input/output error How to make pulseaudio work in 11.10 from source?

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• Which VCS is more applicable for our workflow?

  - by Thomas Mancini

  Currently we have code stored on a shared network drive and do not use any kind of VCS. The code stored on our shared network drive is always being backed up. We would like to keep things as close to they are now as possible, while using some kind of VCS software. I am envisioning a centralized workflow with each developer having a local copy of the code on his/her machine. We don't do any branching or working offline. Typically when we spin off a new version we would just copy the current working directory to a new directory. I believe we would continue doing this and just create a repository for the new version. I would rather not get into an argument over which VCS is better, just hoping to get some opinions for which is best suited and most applicable for what we are trying to do.

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• How to properly express programming proficiency in CV?

  - by Pouya

  I'm rewriting my CV and I have a very hard time to express my programming skills in an honest matter while not underrating myself. How would you classify programming skill in four or five levels from complete beginner to god-like? For sake of argument, let us consider C++. What words would you use to present your programming skills? For example who is an expert in C++ or which word has a higher impact: Expert vs. Experienced? Could you suggest me 5 words like above in ascending order? P.S. I was planning to ask this question in Academia.SE, however, at the end I realized that I want to know programmers answer to the question.

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• most efficient AABB vs Ray collision algorithms

  - by Asher Einhorn

  Is there a known 'most efficient' algorithm for AABB vs Ray collision detection? I recently stumbled accross Arvo's AABB vs Sphere collision algorithm, and I am wondering if there is a similarly noteworthy algorithm for this. One must have condition for this algorithm is that I need to have the option of querying the result for the distance from the ray's origin to the point of collision. having said this, if there is another, faster algorithm which does not return distance, then in addition to posting one that does, also posting that algorithm would be very helpful indeed. Please also state what the function's return argument is, and how you use it to return distance or a 'no-collision' case. For example, does it have an out parameter for the distance as well as a bool return value? or does it simply return a float with the distance, vs a value of -1 for no collision? (For those that don't know: AABB = Axis Aligned Bounding Box)

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• 10.04 wont boot after power outage

  - by Pat

  After unexpected power outage 10.04 won't boot, the following message appears mount: mounting /dev/disk/by-uuid/***************************** on /root failed: Invalid argument mount: mounting /sys on /root/sys failed: No such file or directory mount: mounting /dev on /root/dev failed: No such file or directory mount: mounting /sys on /root/sys failed: No such file or directory mount: mounting /proc on /root/proc failed: No such file or directory Target file system doesn't have /sbin/init No init found. Try passing init= bootarg Busybox v1.13.3 (Ubuntu 1:1.13.3-1ubuntu7) built-in shell (ash) Enter 'help' for a list of built-in commands (initramfs) _ I have tried rebooting from a liveCD but it wont boot and I cannot open a terminal to try to fix it by sudo fdisk -l as recommended on other posts. Any help would be greatly appreciated

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• Converting mp4 to mp3

  - by aki

  I have a video I need to convert to mp3 (from the command line - not GUI) video.mp4 I tried: ffmpeg -i -b 192 video.mp4 video.mp3 with no success. I get the following error: WARNING: library configuration mismatch Seems stream 0 codec frame rate differs from container frame rate: 59.83 (29917/500) -> 59.75 (239/4) WARNING: The bitrate parameter is set too low. It takes bits/s as argument, not kbits/s Encoder (codec id 86017) not found for output stream #0.0 so I tried lame: lame -h -b 192 video.mp4 video.mp3 I get: Warning: unsupported audio format Am I missing something?

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• Pros and Cons of Session Replication

  - by techsjs2012

  Do I really need Session Replication? I am working on a number of web projects for a firm. Most of the projects are about one or two pages of input and then doing a save to a mysql database. Very Basic projects. My SA's are pushing to try to get session replication working in JBoss but I don't really see any need for it and all of its overhead. We need load balancing and clustering so if the server does go down we can move the new requests to the backup service but I am not to big in session replication. This is very low volume projects. In my eyes what is the odds of a user being in the project as the server goes down on the one or two pages. I need to convince the SAs that session replication is an un-necessary complication in this instance. I am looking for pros and cons of session replication so that I can better structure my argument.

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• Advice on how to understand in general and in practice IT Infrastructure

  - by Luca

  My IT knowledge resides mainly in SW development. I have just some basic know how about networks. On the net I tried to get information and read books in order to better understand the overall IT infrastrcuture, but all the sources I found are too generic or, mainly, too detailed in just one aspect, making me lost. Could anyone suggest some books or web resources as good compromise in details? My goal would be able to understand the network issues and security threats when, for example, two remote system have to be setup and put in connection each other. Considering this scenario there are several aspects to consider: firewalls, intranet/internet interconnections, certificates for httpS, etc. The argument is quite wide, therefore I was looking for something that might help to start to understand this subject without going too deep in details (Computer Networks from A.Tanenbaum is a wonderful milestone, but way too specific for my scope). Thanks

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• Why to let / not let developers test their own work

  - by pyvi

  I want to gather some arguments as to why letting a developer testing his/her own work as the last step before the product goes into production is a bad idea, because unfortunately, my place of work sometimes does this (the last time this came up, the argument boiled down to most people being too busy with other things and not having the time to get another person familiar with that part of the program - it's very specialised software). There are test plans in this case (though not always), but I am very much in favor of making a person who didn't make the changes that are tested actually doing the final testing. So I am asking if you could provide me with a good and solid list of arguments I can bring up the next time this is discussed. Or to provide counter-arguments, in case you think this is perfectly fine especially when there are formal test cases to test.

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• Javascript: Avoid this and new - further reading? [closed]

  - by Thomas Deutsch

  I do not want this to end in a sort of religious discussion, i want to collect some sources for further reading on this topic. As shown here: Node.js Style and Structure Point 1: Avoid this and new you can find a good example when it could be better to use closures instead of a prototype, and to make every argument explicit. Ok, i agree - could be nice, but i need to know more. Can anyone recommend a good link? Would this make my code 100% object-pattern-free ? (no factory-, repository-, module- pattern?)

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• Input to program without command-line arguments

  - by Core Xii

  Let's assume that there are no command-line arguments. How do you pass input data to a program? I'm thinking you'd write the input to a file with a specific name, such that the program knows to open and read it as input. However, how would one discover the name of that file? Usually, running a command-line program without arguments or with some standard help argument (e.g. \?) produces some instruction on how to use it. But given an environment with no command-line arguments, how does one discover how to operate a program?

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