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• Is there any open source user-guide type creation software available?

  - by Jon

  Is there any open source user-guide type creation software available? Or is it best to use wiki type systems? We want to be able to create user guides on the fly through a web front end and accessible on the net. Or is this best achieved using Wikis? Thanks

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• amazon design doubt

  - by praveen

  I was looking at the amazon website and was wondering how one of the feature would have been implemented. The feature : what customers buy after viewing a particular item. If i were to develop such a feature i would probably generate a session id for each user session and store the session id-page id combination in a log file. and if a book is bought set a separate flag for the session id-page id. A separate program can then be run on the log file periodically, to identify the groups that were bought together/viewed together and that information can be stored in a persistent file. This is ofcourse a simple solution without taking into consideration the distributed nature of the servers - but would this suffice or can you help me identify a better design.

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• On Solaris, how do you mount a second zfs system disk for diagnostics?

  - by Matt Ball

  I've got two hard disks in my computer, and have installed Solaris 10u8 on the first and Opensolaris 2010.3 (dev onnv_134) on the second. Both systems uses ZFS and were independently created with a zpool name of 'rpool'. While running Solaris 10u8 on the first disk, how do I mount the second ZFS hard disk (at /dev/dsk/c1d1s0) on an arbitrary mount point (like /a) for diagnostics?

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• Dynamic Behaviour

  - by milena

  HI, I want to find non-common examples of dynamic systems, to be modeled using UML. Any ideas?? Thanks

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• What should I learn to improve my Java skills ?

  - by hory.incpp

  Hello, I currently know Java SE and I want to learn something more 'enterprise'. I would like something more distributed (app server, server programming, web, content management system ...) but any suggestion is ok. There are many frameworks which I've heard: spring, hibernate, persistence, ejb, jsp, servlet, jsf, jboss, glassfish, ant etc etc etc etc. I'm very confused where to start. So the question is: Can somebody explain to me what actually there frameworks are; and which one should I start with ? Thank you.

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• How to get the linux folder and file icons and names in java?

  - by André

  I'm creating a tree of folders and files in java. Windows and OSX return the system icons and name with the following code: new JFileChooser().getIcon(File f); new JFileChooser().getName(File f); Is there any possibility to get the icons and name of unix systems?. A system command would be ok too. Thanks.

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• Articles about replication schemes/algorithms?

  - by jkff

  I'm designing an hierarchical distributed system (every node has zero or more "master" nodes to which it propagates its current data). The data gets continuously updated and I'd like to guarantee that at least N nodes have almost-current data at any given time. I do not need complete consistency, only eventual consistency (t.i. for any time instant, the current snapshot of data should eventually appear on at least N nodes. It is tricky to define the term "current" here, but still). Nodes may fail and go back up at any moment, and there is no single "central" node. O overflowers! Point me to some good papers describing replication schemes. I've so far found one: Consistency Management in Optimistic Replication Algorithms

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• How could it happen that version control software emerged so lately?

  - by sharptooth

  According to Wikipedia (the table at the page bottom), the earliest known version control systems were CVS and TeamWare both known from year 1990. How can it be? Software development has been here from at most 1960's and I honestly can't imagine working with codebase without version control. How could it happen that version control software emerged so lately compared to software development?

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• Convert Textile Markup to Markdown?

  - by mdorseif

  I'm merging legacy Systems and some components use Markdown and others use Textile formatting. This is extremely confusing to my users. Therefore I want to standardize on Markdown. Is there a way to convert at least the Bulk of Textile formatting to markdown automatically?

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• Continuous Integration System for Delphi

  - by Ludwig Wensauer

  Are there any CI-Systems for Delphi like Hudson for Java? Does Hudson has any Delph integrations?

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• Sprite to Line Collision

  - by Alu

  If I have a sprite, how would I check collision between two points? For example, in a game I am making, I would like to draw multiple lines that my sprite collides against. I'm thinking that this is more flexible than other collision systems if I had a lot of platforms.

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• Source Control at home

  - by Sash

  I am trying to setup a dev environment at home. My primary development environment is VS.NET 2008 (now it is VS 2010 Premium) with SQL Server 2008. Objectives / Requirements : - Should be simple and lightweight - Should have a Visual Studio plugin (cost should be less than $50, if its not free) - should work just fine with continuous integration systems like TFS and CruiseControl.NET - VSS is not an option. Thanks in advance, SK

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• Which are the differences/similarities between hibernate and other frameworks or specifications?

  - by JPCF

  I want to know the differences/similarities between Hibernate and simple persistence in J5EE? I'm not clear if Hibernate implements J5EE persistence implementation or if it is a totally different approach to data representation over back-end systems. Also, I want to know other approaches (frameworks) like JPA or Spring... Thanks

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• Naive question of memory references in Operating system

  - by darkie15

  Hi All, I am learning memory references pertaining to Operating systems and don't seem to get to the crux of understanding it. For example, I am not able to visualize this scenario properly: "A 36 bit address employs both paging and segmentation. Both PTE and STE are 4 bytes each". How are they related? I can guess that this question might be too simple for many. But any help understanding the above basic concept would be appreciable. Regards, darkie15

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• How do you become software developer for satellites and other mission critical sw ?

  - by Stefano Borini

  I was wondering... There are people out there who code stuff going to mars, satellite control systems, nuclear facilities. What kind of training did they do ? What is their career path ?

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• Are the "System" and "System Idle Process" PIDs constant on Windows?

  - by kdt

  On a couple of windows XP systems I've looked at, the "System Idle Process" always has PID 0, and the "System" process always has PID 4. In a Windows program which enumerates processes, is it safe to recognise these processes by these PIDs, or can they be different in some circumstances?

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• Is ActiveMQ unreliable?

  - by user122991

  Hello, We have been using ActiveMQ 5.2 in our distributed enterprise application for about 3 months. During that time, we have experienced debilitating failures at least twice weekly. In particular, we see: 1) Topic publisher has its connection arbitrarily closed and experiences EOF on attempt to publish. Note well that this issue is not a function of some timeout. It does not correlate reliably with any inactivity. 2) Queue listeners never receive message. Message simply sits on Queue. 2) is much rarer (hardly ever) than 1). In both cases, the failures are highly intermittent-- they cannot be reliably reproduced through any testing usage pattern. Also, there are no errors or warning in the AMQ logs. Have others experienced similar problems? Is there an opinion that some other JMS provider is more reliable? thanks, Joe

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• Building a minimal plugin architecture in Python.

  - by dF

  I have an application, written in Python, which is used by a fairly technical audience (scientists). I'm looking for a good way to make the application extensible by the users, i.e. a scripting/plugin architecture. I am looking for something extremely lightweight. Most scripts, or plugins, are not going to be developed and distributed by a third-party and installed, but are going to be something whipped up by a user in a few minutes to automate a repeating task, add support for a file format, etc. So plugins should have the absolute minimum boilerplate code, and require no 'installation' other than copying to a folder (so something like setuptools entry points, or the Zope plugin architecture seems like too much.) Are there any systems like this already out there, or any projects that implement a similar scheme that I should look at for ideas / inspiration?

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• what is as/400?

  - by coderex

  Hello what is AS/400 and where we use such systems? Which Programming language is using? where can i get the detail information about as400.

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• How does a GUI Framework work?

  - by AlexW.H.B.

  I have been all over the web looking for an answer to this, and my question is this: How does a GUI framework work? for instance how does Qt work, is there any books or wibsites on the topic of writing a GUI framework from scratch? and also does the framework have to call methods from the operating systems GUI framework? -- Thank you to any one who takes the time to try to answer this question, and forgive me if i misspelled anything.

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• Linux - specific API reference

  - by Goofy

  Hello! Where can I find centralized and complete documentation aboput Linux - specific API? I'm preparing Linux port of my application and i want to use as much Linux - specific features as it's possible. So far I found that Linux provide epoll and inotify API, which are great news for me, because my program works as network server and monitor local file systems.

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• c# multi threaded file processing

  - by user177883

  There is a folder that contains 1000 of small text files. I aim to parse and process all of them while more files are being populated in to the folder. My intention is to multithread this operation as the single threaded prototype took 6 minutes to process 1000 files. I like to have reader and writer thread(s) as following : while the reader thread(s) are reading the files, I d like to have writer thread(s) to process them. Once the reader is started reading a file, I d like to mark it as being processed, such as by renaming it, once it s read, rename it to completed. How to approach such multithreaded application ? Is it better to use a distributed hash table or a queue? Which data structure to use that would avoid locks? Would you have a better approach to this scheme that you like to share?

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• hexdump confusion

  - by zedoo

  I am playing with the unix hexdump utility. My input file is UTF-8 encoded, containing a single character ñ, which is C3 B1 in hexadecimal UTF-8. hexdump test.txt 0000000 b1c3 0000002 Huh? This shows B1 C3 - the inverse of what I expected! Can someone explain? For getting the expected output I do: hexdump -C test.txt 00000000 c3 b1 |..| 00000002 I was thinking I understand encoding systems..

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• Can I automate the finding of -l parameter I use when linking based on header files (gcc)?

  - by kavic

  Normally when linking against a static library, I have to specify a library directory and the name of a libX.so (or its symbolic link) as -lX flag for linking [and its directory with -L flag]. Can I automate this based on my header files (in c/c++) only? Or maybe it is not a good idea? Is there a software for locating the -L and -l parameters automatically? Is some table stored somewhere on the system about this on popular linux systems or even cygwin?

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• What are the strategies behind closing unresolved issues in different issue tracking process definitions

  - by wonko realtime

  Recently, i found out that it seems to me like a good part of the "administratives" tend to close "issues" in their bug- and issue-tracking systems with the reason that they don't fit in "their next release". One example for that can be found here: https://connect.microsoft.com/VisualStudio/feedback/details/640440/c-projects-add-option-to-remove-unused-references Because i fear that i've got a fundamental lack of understanding for this approach, i'm wondering if someone can point me to informations which could give some insight in the rationales behind such processes.

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