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• deploying a Python application from a PHP developer

  - by user1218776

  I'm a little confused on the deployment process for Python. Let's say you create a brand new project with virtualenv source bin/activate pip install a few libraries write a simple hello world app pip freeze the dependencies When I deploy this code into a machine, do I need first make sure the machine is sourced before installing dependencies? I don't mean to sound like a total noob but in the PHP world, I don't have to worry about this because it's already part of the project. All the dependencies are registered with the autoloader in place. The steps would be: rsync the files (or any other method) source bin/activate pip install the dependencies from the pip freeze output file It feels awkward, or just wrong and very error prone. What are the correct steps to make? I've searched around but it seems many tutorials/articles make an assumption that anyone reading the article has past python experience (imo).

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• ubuntu 12.04 server and tftp access violation issue on put command

  - by SMYERS

  I installed tftp as per this document: http://icesquare.com/wordpress/solvedtftp-error-code-2-access-violation/ I followed this to the letter 3 times and every time I put a file I get: root@CiscoCFG:~# tftp localhost tftp put test Error code 2: Access violation tftp root@CiscoCFG:~# tftp localhost tftp put test Error code 2: Access violation If I touch the file name chmod 777 the file then do a put it works perfectly fine. My config is as follows: service tftp { protocol = udp port = 69 socket_type = dgram wait = yes user = nobody server = /usr/sbin/in.tftpd server_args = -s /svr/tftp disable = no } the directory /svr/tftp permissions are 777: drwxrwxrwx 3 nobody nobody 4096 Nov 14 10:32 svr This thing should have full permissions as would anyone who wanted to write or read from that directory. I see nothing in the logs im really stumped on this. If the file is already in the directory I can read it all day long, I just cant make NEW files, can not put them, but I can do get's, I can only put to an existing file with permissions @777. Thanks

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• How to reset mac PRAM through the command line in Lion/Mountain Lion?

  - by boneyjellyfish

  I'm trying to write a script to automate a PRAM reset and I've seen a lot of old guides that tell me to use the following command to reset the Mac's PRAM via the terminal: nvram boot-args="-p -r" But this command doesn't seem to work anymore, at least not on any of the computers I've tried it on. I'm trying to find a more up-to-date list of available boot-args and I was able to find this question about boot-args strings but there doesn't seem to be anything in there or any of the links about resetting the pram. Any ideas?

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• Cross-platform desktop programming: C++ vs. Python

  - by John Wells

  Alright, to start off, I have experience as an amateur Obj-C/Cocoa and Ruby w/Rails programmer. These are great, but they aren't really helpful for writing cross-platform applications (hopefully GNUStep will one day be complete enough for the first to be multi platform, but that day is not today). C++, from what I can gather, is extremely powerful but also a huge, ugly behemoth that can take half a decade or more to master. I've also read that you can very easily not only shoot yourself in the foot, but blow your entire leg off with it since memory management is all manual. Obviously, this is all quite intimidating. Is it correct? Python seems to provide most of the power of C++ and is much easier to pick up at the cost of speed. How big is this sacrifice? Is it meaningful or can it be ignored? Which will have me writing fast, stable, highly reliable applications in a reasonable amount of time? Also, is it better to use Qt for your UI or instead maintain separate, native front ends for each platform? EDIT: For extra clarity, there are two types applications I want to write: one is an extremely friendly and convenient database frontend and the other, which no doubt will come much later on, is a 3D world editor.

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• How does NTFS compression affect performance?

  - by DragonLord

  I've heard that NTFS compression can reduce performance due to extra CPU usage, but I've read reports that it may actually increase performance because of reduced disk reads. How exactly does NTFS compression affect system performance? Notes: I'm running a laptop with a 5400 RPM hard drive, and many of the things I do on it are I/O bound. The processor is a AMD Phenom II with four cores running at 2.0 GHz. The system is defragmented regularly using UltraDefrag. The workload is mixed read-write, with reads occurring somewhat more often than writes. The files to be compressed include personal documents and selected programs, including several (less demanding) games and Visual Studio (which tends to be I/O bound more often than not).

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• Fourier transform software

  - by CFP

  Hello everyone! After spending a lot of time searching for this, I thought that some SuperUser gurus might know the answer :) I'm searching for an open source application to compute an FFT, that could: * Import a list of points from a text file (in any format, I could write conversion scripts if needed), for example 0,1; 1,2; 4,5 * Compute the associated discrete transform, and output the list of coefficients Ideally, it would also display the plot and the associated fourier decomposition on the same graph, to allow comparison, but this is not absolutely needed. It can be either on Windows or on Linux/Unix. Can you think of a solution? Thanks, CFP.

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• IIS 7 - Provisioning portal

  - by Doug

  I am wanting to setup our production IIS environments with a provisioning portal to ensure that deployment staff always setup sites in a uniform configuration, and that they don't actually have remote access to the servers directly. What is the best 'simple' provisioning tool for such a purpose? Do people write their own using something like Powershell remoting? I don't want to install a tool like HELM or similar as it feels like it creates unnecessary bloat on top of a production environment. features should include: create new website and app pool combo restart, start and stop application pools change bindings on websites

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• Cocos2d: Tongue effect like in Munch Time

  - by Joey Green

  I'm wanting to do a tongue effect for my character like the one in Munch Time( shown in pic ). The player does some action and his tongue attaches to the nearest platform. I'm thinking this is simply a get distance to platform and keep player at that distance as he moves back and forth giving him the swinging effect. For the drawing, I'm wanting the same effect where the tongue sprite is the skinniest in the middle of the distance between the character and platform. I know how to do this in a shader( I'm using cocos2d v2 btw ), but I'm wondering if there is some built-in functionality to allow me to do this. First, is this the right approach using distance? Second, is their an easy way to do the tongue sprite effect without a shader? Third, I'm wanting to have the player spring up at will in the direction of the platform. I'm using Box2D. Would there be a way to do this using force's or would it be easier to write my own code?

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• Retrieving a specific value from “df -h” using shell

  - by diegodias

  When I use df -h, I get the following output: Filesystem Size Used Avail Use% Mounted on /dev/mapper/VolGroup00-LogVol00 59G 2.2G 54G 4% / /dev/sda1 122M 38M 78M 33% /boot tmpfs 1.1G 0 1.1G 0% /dev/shm 10.10.0.105:/somepath 11T 8.4T 2.1T 81% /storage4 10.11.0.101:/somepath 15T 8.9T 5.9T 61% /storage1 /dev/mapper/patha 5.0T 255G 4.8T 5% /storage5_vol0 /dev/mapper/pathb 5.0T 195G 4.9T 4% /storage5_vol1 /dev/mapper/pathc 5.0T 608G 4.5T 12% /storage5_vol2 I want to write a script that gets the value of Avail column on a specific storage. I used to use df -k /storage_name | tail -1 | awk '{print $3}' But the FileSystem column can have a value or not .. which would change the variable of my script from $3 to $4. How can I get the Avail on a single command line even if there are no values on the previous columns?

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• Bad style programming, am I pretending too much?

  - by Luca

  I realized to work in an office with a quite bad code base. The base library implemented in years and years is quite limited, and most of that code is, honestly, horrible. Projects developed in the office are very large. Fine. I could define me a "perfectionist" (but often I'm not), and I thought to refactor an application (really a portion), which need a new (complex) feature. But, today, I really realized that it's not possible to refactor that application modules with a reasonable time (say, 24/26 hours, respect the avaialable time for the task, which is 160 hours). I'm talking about (I am a bit ashamed to say) name collisions, large and frequent cut & paste code, horrible and misleading naming, makefiles without dependencies (!), application login is spread randomly across many different sources, dead code, variable aliasing, no assertion, no documentation, very long source files, bad/incomplete include file definition, (this is emblematic!) very frequent extern declaration of variables and functions, ... I'm sure to continue ... buffer overflows because sprintf, indentation (!), spacing, non existent const modifier usage. I would say that every source line was written quite randomly when needed, without keeping in mind some design (at least, the obvious one). (Am I in hell?) The problem arises when the application is developed by a colleague of mine. I felt very frustrated. So, I decided to expose the "situation" to my colleague; at the end, that was a bad idea. He is justified in saying that "the application was developed in haste, so it is natural that it is written vaguely; you are wasting time to think and implement an elegant implementation" .... I'm asking too much from my colleague to write readable code, which is managed and documented? I expect too much in not having to read thousands of lines of code to understand how a particular logic?

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• Tutuorial for Quick Look Generator for Mac

  - by vgm64

  I've checked out Apple's Quick Look Programming Guide: Introduction to Quick Look page in the Mac Dev Center, but as a more of a science programmer rather than an Apple programmer, it is a little over my head (but I could get through it in a weekend if I bash my head against it long enough). Does anyone know of a good basic Quick Look Generators tutorial that is simple enough for someone with only very modest experience with Xcode? For those that are curious, I have a filetype called .evt that has an xml header and then binary info after the header. I'm trying to write a generator to display the xml header. There's no application bundle that it belongs to. Thanks!

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• Why won't the floppy mount?

  - by dboarman-FissureStudios

  The 1.44Meg floppy won't mount in my Nautilus file browser. When I try to mount it, it says there is no media in the drive. Yet, I can write to the floppy through the terminal using the 'cp' command. I can enter the command: mount -t ext2 /floppy and it mounts. I have also run a check and the disk itself is 100% clean. So, why can't I get the nautilus browser to open up the floppy? Is there a way to see the actual floppy from the terminal?

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• How do I apply different probability factors in an algorithm for a cricket simulation game?

  - by Komal Sharma

  I am trying to write the algorithm for a cricket simulation game which generates runs on each ball between 0 to 6. The run rate or runs generated changes when these factors come into play like skill of the batsman, skill of the bowler, target to be chased. Wickets left. If the batsman is skilled more runs will be generated. There will be a mode of play of the batsman aggressive, normal, defensive. If he plays aggressive chances of getting out will be more. If the chasing target is more the run rate should be more. If the overs are final the run rate should be more. I am using java random number function for this. The code so far I've written is public class Cricket { public static void main(String args[]) { int totalRuns=0; //i is the balls bowled for (int i = 1; i <= 60 ; i++) { int RunsPerBall = (int)(Math.random()*6); //System.out.println(Random); totalRuns=totalRuns+RunsPerBall; } System.out.println(totalRuns); } } Can somebody help me how to apply the factors in the code. I believe probability will be used with this. I am not clear how to apply the probability of the factors stated above in the code.

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• Annotate source code with diagrams as comments

  - by Steven Lu

  I write a lot of (primarily c++ and javascript) code that touches upon computational geometry and graphics and those kinds of topics, so I have found that visual diagrams have been an indispensable part of the process of solving problems. I have determined just now that "oh, wouldn't it just be fantastic if I could somehow attach a hand-drawn diagram to a piece of code as a comment", and this would allow me to come back to something I worked on, days, weeks, months earlier and far more quickly re-grok my algorithms. As a visual learner, I feel like this has the potential to improve my productivity with almost every type of programming because simple diagrams can help with understanding and reasoning about any type of non-trivial data structure. Graphs for example. During graph theory class at university I had only ever been able to truly comprehend the graph relationships that I could actually draw diagrammatical representations of. So... No IDE to my knowledge lets you save a picture as a comment to code. My thinking was that I or someone else could come up with some reasonably easy-to-use tool that can convert an image into a base64 binary string which I can then insert into my code. If the conversion/insertion process can be streamlined enough it would allow a far better connection between the diagram and the actual code, so I no longer need to chronographically search through my notebooks. Even more awesome: plugins for the IDEs to automatically parse out and display the image. There is absolutely nothing difficult about this from a theoretical point of view. My guess is that it would take some extra time for me to actually figure out how to extend my favorite IDEs and maintain these plugins, so I'd be totally happy with a sort of code post-processor which would do the same parsing out and rendering of the images and show them side by side with the code, inside of a browser or something. Since I'm a javascript programmer by trade. What do people think? Would anyone pay for this? I would.

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• Stack Trace Logger [migrated]

  - by Chris Okyen

  I need to write a parent Java class that classes using recursion can extend. The parent class will be be able to realize whenever the call stack changes ( you enter a method, temporarily leave it to go to another method call, or you are are finsihed with the method ) and then print it out. I want it to print on the console, but clear the console as well every time so it shows the stack horizantaly so you can see the height of each stack to see what popped off and what popped on... Also print out if a baseline was reached for recursive functions. First. How can I using the StackTraceElements and Thread classes to detect automatically whenever the stack has popped or pushed an element on without calling it manually? Second, how would I do the clearing thing? For instance , if I had the code: public class recursion(int i) { private static void recursion(int i) { if( i < 10) System.out.println('A'); else { recursion(i / 10 ); System.out.println('B'); } } public static void main(String[] argv) { recursion(102); } } It would need to print out the stack when entering main(), when entering recursion(102) from main(), when it enters recursion(102 / 10), which is recursion(10), from recursion(102), when it enters recursion(10 / 10), which is recursion(1) from recursion(10). Print out a message out when it reaches the baseline recursion(1).. then print out the stacks of reversed revisitation of function recursion(10), recursion(102) and main(). finally print out we are exiting main().

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• [iTunes] Using custom ID3-Tags?

  - by shox

  Hi guys, I hope I am in the right forum for this question. I love foobar2000 on windows and have 2 custom Tags for my mp3s Rate and mood. Now I have to use a Mac to play my music and emulating foobar won't work, because foobar has to recreate its database every time it starts... ans thats about 2h of hahsing - no good. So is there any way to read out, order by and write custom tags with iTunes or any other, if possible free, mac app? Thanks for your answers.

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• Stream.CopyTo() extension method

  - by DigiMortal

  In one of my applications I needed copy data from one stream to another. After playing with streams a little bit I wrote CopyTo() extension method to Stream class you can use to copy the contents of current stream to target stream. Here is my extension method. It is my working draft and it is possible that there must be some more checks before we can say this extension method is ready to be part of some API or class library. public static void CopyTo(this Stream fromStream, Stream toStream) {     if (fromStream == null)         throw new ArgumentNullException("fromStream");     if (toStream == null)         throw new ArgumentNullException("toStream");       var bytes = new byte[8092];     int dataRead;     while ((dataRead = fromStream.Read(bytes, 0, bytes.Length)) > 0)         toStream.Write(bytes, 0, dataRead); } And here is example how to use this extension method. using(var stream = response.GetResponseStream()) using(var ms = new MemoryStream()) {     stream.CopyTo(ms);       // Do something with copied data } I am using this code to copy data from HTTP response stream to memory stream because I have to use serializer that needs more than response stream is able to offer.

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• IOS OpenGl transparency performance issue

  - by user346443

  I have built a game in Unity that uses OpenGL ES 1.1 for IOS. I have a nice constant frame rate of 30 until i place a semi transparent texture over the top on my entire scene. I expect the drop in frames is due to the blending overhead with sorting the frame buffer. On 4s and 3gs the frames stay at 30 but on the iPhone 4 the frame rate drops to 15-20. Probably due to the extra pixels in the retina compared to the 3gs and smaller cpu/gpu compared to the 4s. I would like to know if there is anything i can do to try and increase the frame rate when a transparent texture is rendered on top of the entire scene. Please not the the transparent texture overlay is a core part of the game and i can't disable anything else in the scene to speed things up. If its guaranteed to make a difference I guess I can switch to OpenGl ES 2.0 and write the shaders but i would prefer not to as i need to target older devices. I should add that the depth buffer is disabled and I'm blending using SrcAlpha One. Any advice would be highly appreciated. Cheers

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• "svn: Cannot negotiate authentication mechanism" for OSX CLI and WinXp TortoiseSVN, but linux CLI works

  - by dacracot

  I had a working subversion server which used the passwd file which stores passwords in clear text. My requirements changed so that passwords now need to be encrypted. I did everything according to the book to use SASL, or so I believe, but now only the linux command line can authenticate. My OSX users, which also use command line, and my WinXp users, which use TortoiseSVN get errors. Linux versions are 1.6.11. OSX versions are 1.6.17. And TortoiseSVN versions are 1.7.4. /opt/subversion/QRpage/conf/svnserve.conf: [general] anon-access = none auth-access = write realm = ABC [sasl] use-sasl = true min-encryption = 128 max-encryption = 256 /etc/sasl2/svn.conf: pwcheck_method: auxprop auxprop_plugin: sasldb sasldb_path: /etc/sasldb2 mech_list: DIGEST-MD5 Then I add new users via: saslpasswd2 -c -f /etc/sasldb2 -u ABC dacracot But for instance OSX users get this error trying to check out: $ svn co svn://svn.nowhere.org/QRpage svn: Cannot negotiate authentication mechanism

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• Access Log Files

  - by Matt Watson

  Some of the simplest things in life make all the difference. For a software developer who is trying to solve an application problem, being able to access log files, windows event viewer, and other details is priceless. But ironically enough, most developers aren't even given access to them. Developers have to escalate the issue to their manager or a system admin to retrieve the needed information. Some companies create workarounds to solve the problem or use third party solutions.Home grown solution to access log filesSome companies roll their own solution to try and solve the problem. These solutions can be great but are not always real time, and don't account for the windows event viewer, config files, server health, and other information that is needed to fix bugs.VPN or FTP access to log file foldersCreate programs to collect log files and move them to a centralized serverModify code to write log files to a centralized placeExpensive solution to access log filesSome companies buy expensive solutions like Splunk or other log management tools. But in a lot of cases that is overkill when all the developers need is the ability to just look at log files, not do analytics on them.There has to be a better solution to access log filesStackify recently came up with a perfect solution to the problem. Their software gives developers remote visibility to all the production servers without allowing them to remote desktop in to the machines. They can get real time access to log files, windows event viewer, config files, and other things that developers need. This allows the entire development team to be more involved in the process of solving application defects.Check out their product to learn morehttp://www.Stackify.com

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• Python web frameworks comparisons

  - by stupidLearner

  I recently asked a question on SO about Python web frameworks: http://stackoverflow.com/questions/4909306/python-web-frameworks-vs-java-web-frameworks-how-is-web-development-in-python-do I want to learn one just for fun but it also has to be able to help me deliver a proper working application. I am looking for a framework with lots of features, powerful, mature, with large community, good documentation, books etc. I need something that will help me be more productive in developing my app and not waste time figuring out how to do a certain thing in the framework or how to write workaround around the limitations of the framework. I was thinking one of the following: django, zope, turbogears, pylons. Off course the war is raging out there and there are other alternatives but seems Django is at the top... or is it just hype? I am interested in pros and cons of each. What was the best feature you think the framework has? What is the thing it lacks? What could have been done differently. Help me chose one to learn for starters.

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• Banshee music file copy to Mac iPhone 4s ios5.1 not permanent

  - by user95736

  In Ubuntu 12.04 - When I drag .mp3 files from Banshee 2.6 to my Mac-formatted iPhone 4s ios5.1: a. Banshee says it's syncing with the phone, updating the media database, and the filecount on the phone is incremented; b. The files show up under the device in Banshee and I can play them; c. I can see them on the iPhone in a file browser; d. I can navigate to the iPhone filesystem in a terminal and create a file, so I know I have write permissions. When I disconnect the device in Banshee, it again tells me it's syncing the phone and updating the media database, but I can't find the songs on the phone in iTunes - they are not there when I reconnect the phone to my computer. Am I just being deceived by gvfs? I haven't been able to find a recent post indicating the status of syncing ios5.x devices with Banshee, RhythmBox, etc... Can someone tell me if this should work? Also, I wonder if my iPhone needs to be formatted/initialized by iTunes for Windows, since it has been managed on a Mac? I solved a syncing problem with an older ipod classic which had been managed by iTunes on a Mac, by re-initializing it under iTunes for Windows - perhaps an hfs+ issue. Thanks for any help.

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• Is it a "pattern smell" to put getters like "FullName" or "FormattedPhoneNumber" in your model?

  - by DanM

  I'm working on an ASP.NET MVC app, and I've been getting into the habit of putting what seem like helpful and convenient getters into my model/entity classes. For example: public class Member { public int Id { get; set; } public string FirstName { get; set; } public string LastName { get; set; } public string PhoneNumber { get; set; } public string FullName { get { return FirstName + " " + LastName; } } public string FormattedPhoneNumber { get { return "(" + PhoneNumber.Substring(0, 3) + ") " + PhoneNumber.Substring(3, 3) + "-" + PhoneNumber.Substring(6); } } } I'm wondering people think about the FullName and FormattedPhoneNumber getters. They make it very easy to create standardized data formats throughout the app, and they seem to save a lot of repeated code, but it could definitely be argued that data format is something that should be handled in mapping from model to view-model. In fact, I was originally applying these data formats in my service layer where I do my mapping, but it was becoming a burden to constantly have to write formatters then apply them in many different places. E.g., I use "Full Name" in most views, and having to type something like model.FullName = MappingUtilities.GetFullName(entity.FirstName, entity.LastName); all over the place seemed a lot less elegant than just typing model.FullName = entity.FullName (or, if you use something like AutoMapper, potentially not typing anything at all). So, where do you draw the line when it comes to data formatting. Is it "okay" to do data formatting in your model or is that a "pattern smell"? Note: I definitely do not have any html in my model. I use html helpers for that. I'm strictly talking about formatting or combining data (and especially data that is frequently used).

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• Getting into game/game engine programming

  - by Darkslash

  So I am interested in learning game programming, but I really have an interest in the lower level engineering in games. I have openGL experience, and I am really interested in learning more about implementing AI, Physics, etc. I have a computer science degree, so I really like getting into technical stuff. Many times when I ask about this sort of thing, I get a lot of "Use an engine", "Use Unity3d", "Why waste your time writing code that already exists", etc etc. My idea was to use simpler libraries such as SFML or XNA so that I could learn how to implement the more complex systems. The thing is, although I do want to write games, I want to learn things that using something like Unity simply doesnt teach you. My goal is not to make a current generation quality 3D game to sell, I just want to make some cool smaller games and learn all I can about the programming side of game development. Is this something that people just do not do anymore? It seems like everywhere I turn people are using Unity or UDK or GameMaker. I fully understand why you would use a tool like these, but I cant see how they would suit my purposes. So where does someone like myself turn? Am I trying to learn something that people just do not bother doing anymore? Is the innovation in this area gone and just all about gameplay now? Im sorry if this question seems silly, but I am genuinely interested in knowing more about this and meeting more people who are interested in this sort of thing.

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• Coding exercise for Linux Systems Admin?

  - by Prashanth Sundaram

  Hello All, I am preparing for a Systems Admin(linux) role for a big company(top 10 companies) and one of the requisite is knowledge of a language like perl, python or Ruby. I have a phone interview which involves sharing a editor with the interviewer, now what kind of coding exercise can I expect on a phone interview or a regular interview? I have used shell for most of my day-to-day tasks and occasionally Perl and python for bigger tasks. Now I don't expect them to ask Write a script that sync's AD users to LDAP? I don't think data structures, algorithms or sorting questions apply to me role? Can you give me any examples of SysAdmin related coding questions?

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