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  • programming books [closed]

    - by davit-datuashvili
    I have only one dream -- to buy these two books: Introduction to Algorithms, Third Edition Concrete Mathematics: A Foundation for Computer Science Sorry for my dream, this is a site for posting programming questions, but unfortunately everything happened

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  • How to write to a remote domain

    - by user347743
    Hello, I have a domain www.example.com In the domain, www.example.com/write directory is chmod to 777. Now, suppose, if I want to create a new directory like www.example.com/write/new from www.some-domain.com, what should I be doing. I know PHP, Python. Please relate the answers to this.

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  • I saved PuTTY password when logging in, how to unsave it?

    - by xiaolaidd
    I mistakenly saved password first time logging to the server through PuTTY. How can I unsave the password? I don't want the password to be saved, instead I want to type the password everytime when I want to log in. Sorry that the question maybe confusing. The problem is I mistakenly click "yes" when PuTTY asked me to save the password or not. When logging in, it will prompt running "my username" and "my password". Apparently it will complain command not found. Just want to know where PuTTY stores my password so that I can delete it. Thanks,

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  • Truncating a file while it's being used (Linux)

    - by Hobo
    I have a process that's writing a lot of data to stdout, which I'm redirecting to a log file. I'd like to limit the size of the file by occasionally copying the current file to a new name and truncating it. My usual techniques of truncating a file, like cp /dev/null file don't work, presumably because the process is using it. Is there some way I can truncate the file? Or delete it and somehow associate the process' stdout with a new file? FWIW, it's a third party product that I can't modify to change its logging model. EDIT redirecting over the file seems to have the same issue as the copy above - the file returns to its previous size next time it's written to: ls -l sample.log ; echo > sample.log ; ls -l sample.log ; sleep 10 ; ls -l sample.log -rw-rw-r-- 1 user group 1291999 Jun 11 2009 sample.log -rw-rw-r-- 1 user group 1 Jun 11 2009 sample.log -rw-rw-r-- 1 user group 1292311 Jun 11 2009 sample.log

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  • How to find files older than N days from a given timestamp

    - by JGeZau
    I want to find files older than N days from a given timestamp in format YYYYMMDDHH I can find file older than 2 days with the below command, but this finds files with present time find /path/to/dir -mtime -2 -type f -ls Lets say I give the input timeSamp=2011093009 so I want to find files older than 2 days from 2011093009 Been doing my research, but can't seem to figure it out. ========================================== Found the solution...see below for my Answer.. Thanks

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  • elinks http autentication

    - by G45
    I'm trying to use linux elinks text browser to go to a website. This site requires http authentication. If I press escape it and hide the login prompt once and then If I try to go the particular website again it doesn't show the login prompt again. I try "flush all caches" But it doesn't work until I close my terminal and get a new one. Is there any other way to get over with this? This should be a simple question. But I googled and couldn't find a answer.

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  • monitor and kill runaway processes using 100% IO?

    - by bleomycin
    Hello everyone, i have a few processes that have to be run at high priority (chrt 98) that will occasionally decide to hard-lock and peg 1 core at 100% (not a huge deal) but more importantly it will use all the IO on a system, so much that its impossible to log into the machine via ssh to kill it or perform any task on the machine that isn't loaded into ram. If i happen to have something like htop already running i am able to end the process fine. Is there any type of utility/way to monitor for this type of runaway process and kill anything that uses 100% of system IO for more than X amount of time? Thanks!

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  • Named pipe is using 100% CPU

    - by willwill
    I'm starting the script with ./file.py < pipe >> logfile and the script is: while True: try: I = raw_input().strip().split() except EOFError: continue doSomething() How could I better handle named pipe? This script always run at 100% CPU and it need to be real-time so I cannot use time.sleep.

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  • Would you recommend Head First Programming for someone new?

    - by Sergio
    My brother is just starting out college. He's studying the same thing I am here in Bolivia; Systems Engineer which is the equivalent of what a CS degree is in the US. Being his big brother and a programmer myself I really want to guide him and give him the right material to learn and become good at programming. My motives are selfish I admit, I want him to become really good so he can teach me things in the future. :) After poking around the web, I found Head First Programming. This book seems to teach the fundamentals of programming, using Python as the language. Would you recommend this book as his first book ever? Would learning Python as his first language stunt him somehow? What are your thoughts and suggestions? Thanks!

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  • Why is design by contract considered an alternative to the pseudo programming process?

    - by zoopp
    Right now I'm reading Code Complete by Steve McConnell and in chapter 9 he talks about the Pseudo Programming Process (PPP). From what I've understood, the PPP is a way of programming in which the programmer first writes the pseudo code for the routine he's working on, then refines it up to the point where pretty much each pseudo code line can be implemented in 1-3 lines of code, then writes the code in the designated programming language and finally the pseudo code is saved as comments for the purpose of documenting the routine. In chapter 9.4 the author mentions alternatives to the PPP, one of which is 'design by contract'. In design by contract you basically assert preconditions and postconditions of each routine. Now why would that be considered an alternative? To me it seems obvious that I should use both techniques at the same time and not chose one over the other.

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  • Why is C++ predominant in programming contests and competitions?

    - by daniels
    I understand that C++ is a very fast language, but ain't C just as fast, or faster in some cases? Then you might say that C++ has OOP, but the amount of OOP you need for most programming puzzles is not that big, and in my opinion C would be able handle that. Here's why I am asking this: I am very interested in programming contests and competitions, and I am used to coding in C on those. However, I noticed that the vast majority of people use C++ (e.g., 17 out of 25 finalists on Google Code Jam 2011 used it, while no one used C), so I am wondering if I am at a disadvantage going with C. Apart from the Object Orientation, what makes C++ a more suitable language for programming competitions? What are the features of the language I should learn and use to perform better on the competitions? For background, I consider myself pretty proficient in C, but I am just starting to learn C++.

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  • What are some concepts people should understand before programming "big" projects?

    - by Abafei
    A person new to programming may be able to make a good small program. However, when starting to work on anything bigger than a small (think 1 C source file or Python module) program, there are some general concepts which become much more important when working on "big" (think many Python modules or C files) programs; one example is modularity, another is having a set aim. Some of these may be obvious to people who went to school to learn programming; however, people like me who did not go to programming classes sometimes have to learn these things from experience, possibly creating failed projects in the meantime. ================================================== Please explain what the concept is, and why the concept becomes more important for big programs than by small programs. Please give only 1 concept per answer.

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  • Is it a good idea to simplify an character -driven game engine to the point it's unnecessary to learn scripting/programming ?

    - by jokoon
    I remember, and I still think, that one cannot even make a prototyped 3D game to test just simple behaviors without using gigantic tools like unity or knowing extensive C++ programming, design pattern, a decent or basic 3D engine, etc. Now I'm wondering, since I know programming, that I'm still more lucky that the ones who need to learn programming prior to know how to make something: even scripted engines such as unity are not for kids, and to my sense they tend to dictate their ways of doing things, which is not the case with engine like ogre or irrlicht. I remember toying a little with the blender game engine, it was possible to link states or something I don't remember very well. Now I'm thinking that character driven games occupies a big part of the game market. Do you think it is a good idea to make a character-controlled oriented game engine which allows only to build AI instead of anything else ?

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  • Programming *into* a language vs. writing C code in Ruby

    - by bastibe
    Code Complete states that you should aways code into a language as opposed to code in it. By that, they mean Don't limit your programming thinking only to the concepts that are supported automatically by your language. The best programmers think of what they want to do, and then they assess how to accomplish their objectives with the programming tools at their disposal. (chapter 34.4) Doesn't this lead to using one style of programming in every language out there, regardless of the particular strengths and weaknesses of the language at hand? Or, to put the question in a more answerable format: Would you propose that one should try to encode one's problem as neatly as possible with the particulars of one's language, or should you rather search the most elegant solution overall, even if that means that you need to implement possibly awkward constructs that do not exist natively in one's language?

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  • Will learning programming be as fundamental as learning reading/writing to the kids of the future?

    - by pythagras
    It seems I encounter more and more economists, scientists, and miscellaneous other professionals that have jobs that involve programming on some level. More and more, the jobs that my peers have in many many technical professions involve at least some simple scripting if not something more involved. It seems it used to be that "software engineer" was a distinct profession, now its becoming just another skill like writing -- something that any serious technical professional should be able to use for their job. I see a future where programming is essential to getting any kind of technical/mathematical job. Extrapolating on my anecdotal view of my colleagues... Will the kids of the future become literate in programming in the same way they become readers/writers? Will it become so fundamental to our economy and society that it will be taught at an early age? Will interacting with computers be as important as interacting with other people?

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  • How can I explain object-oriented programming to someone who's only coded in Fortran 77? [closed]

    - by Zonedabone
    Possible Duplicate: How can I explain object-oriented programming to someone who’s only coded in Fortran 77? My mother did her college thesis in Fortran, and now (over a decade later) needs to learn c++ for fluids simulations. She is able to understand all of the procedural programming, but no matter how hard I try to explain objects to her, it doesn't stick. (I do a lot of work with Java, so I know how objects work) I think I might be explaining it in too high-level ways, so it isn't really making sense to someone who's never worked with them at all and grew up in the age of purely functional programming. Is there any simple way I can explain them to her that will help her understand? Thanks for the help in advance.

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