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• Implementing crossover in genetic programming

  - by Name

  Hi, I'm writing a genetic programming (GP) system (in C but that's a minor detail). I've read a lot of the literature (Koza, Poli, Langdon, Banzhaf, Brameier, et al) but there are some implementation details I've never seen explained. For example: I'm using a steady state population rather than a generational approach, primarily to use all of the…

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• Django: How to override a related sets "add" method?

  - by MB_

  I am working on a django project and i want to send a signal when something get's added to some models related set, e.g. we have an owner wo has a set of collectables and each time the method owner.collectable_set.add(something) is getting called i want signal like "collectable_added" or something. signals are clear to me, but in which manager(?)…

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• non-static variable cannot be referenced from a static context (java)

  - by Greg

  I ask that you ignore all logic.. i was taught poorly at first and so i still dont understand everything about static crap and its killing me. My error is with every single variable that i declare then try to use later inside my methods... i get the non-static variable cannot~~ error I can simply put all the rough coding of my methods inside my…

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• Keep a programming language backwards compatible vs. fixing its flaws

  - by Radu Murzea

  First, some context (stuff that most of you know anyway): Every popular programming language has a clear evolution, most of the time marked by its version: you have Java 5, 6, 7 etc., PHP 5.1, 5.2, 5.3 etc. Releasing a new version makes new APIs available, fixes bugs, adds new features, new frameworks etc. So all in all: it's good. But what…

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• Objective-measures of the power of programming languages

  - by Casebash

  Are there any objective measures for measuring the power of programming languages? Turing-completeness is one, but it is not particularly discriminating. I also remember there being a few others measures of power which are more limited versions (like finite-state-autonoma), but is there any objective measure that is more powerful?

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• dynamic programming [closed]

  - by shruti

  the input to this problem is a sequence S of integers(not necessarily positive). the problem is to find consecutive subsequence of S with maximum sum using dynamic programming. consecutive means that you are not allowed to skip numbers. for example: if the input was 12,-14,1,23,-6,22,-34,-13. the output would be 1,23,-6,22.

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• Programming Blogs, Tumblrs, eBooks or Resources

  - by jiewmeng

  i thought it will be good to know what websites, blogs or tumblogs providing good programming resources, latest news/trends etc. i was actually on tumblr when i thought about finding other users to follow, but couldn't. so i thought i asked here, but dont want to be limited to tumblr please enter 1 link per answer to facilitate voting

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• Programming for Multi core Processors

  - by Chathuranga Chandrasekara

  As far as I know, the multi-core architecture in a processor does not effect the program. The actual instruction execution is handled in a lower layer. my question is, Given that you have a multicore environment, Can I use any programming practices to utilize the available resources more effectively? How should I change my code to gain…

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• Dynamic Programming Algorithm?

  - by scardin

  I am confused about how best to design this algorithm. A ship has x pirates, where the age of the jth pirate is aj and the weight of the jth pirate is wj. I am thinking of a dynamic programming algorithm, which will find the oldest pirate whose weight is in between twenty-fifth and seventy-fifth percentile of all pirates. But I am…

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• Replacement for C low level programming?

  - by Sauron

  So C obviously has a pretty dominant low level programming stronghold.....but is anything coming out that challenges/wants to replace it? Python/C#/etc all seem to be aimed at very high level, but when it comes down to nitty-gritty low level stuff C seems to be king and I haven't seen much "try" to replace that? Is there…

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• What's your take on the programming language Go?

  - by fbrereto

  I've just been told about a new programming language, Go, developed at Google by such notables as Ken Thompson and Rob Pike. Does anyone have any experience with it so far? What are your thoughts about how viable small- and large-scale applications could be developed with it? Relevant links (thanks to Lance Roberts; feel…

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• Programming interview : quick ways to ensure that program is correct

  - by Algorist

  Hi, I faced a telephonic interview recently and I was asked to write a program. The program is non-trivial to understand, but I am asked to write the program. I wrote the program and interviewer showed me bugs on some corner cases. I wish, I could have found the corner cases earlier. what does everyone do in this case. …

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• Language for non-programmers to start learning programming

  - by zarawesome

  A non-programmer friend will be starting the Computer Science college course in a few months. I'd like her to try her hand at some programming before she starts her studies (the course itself expects one to know C, but it's an horrible language to learn to program at). What language would be the best to do so? Related…

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• Are there any ball tracking algorithms/patterns around in game programming

  - by user214626

  Hello, I am a newbie to game programming,I would need the suggestions and help of the wonderful people around here. I have set of players, and a ball, the players can kick the ball around the ground (not yet a football game, neither a foosball game too ).Are there any algorithms/ patterns for addressing the problems…

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• Is there a Chilton's like site for quoting/Programming

  - by Vecdid

  Do you know if there is anything out there like Chilton's for cars: http://chilton.cengage.com/ For programming or sites that may be like it. I am trying to get a better grip on quoting jobs and wondering if there is anything like this.

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• Big datastructures in functional programming

  - by Denis Gorodetskiy

  I'm newbie in Functional Programming. I have a huge neural network with thousands of neurons and every connection between neurons has its weight. I have to update these weights very often, several thousand times per learning session. Is FP still applicable here? I mean in fp we can't modify variables and only able…

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• Windows Programming with Win32SDK/MFC/wxWidget

  - by JMSA

  Being a C#/Java programmer, I really need to know a fact: Has Windows Programming with Win32SDK/MFC/wxWidget become antiquated? What is the status of popularity of these technologies in software industry now? Being a C#/Java programmer, do I need to learn Win32SDK/MFC/wxWidget now?

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• Comparisons of web programming languages (on speed, etc.)

  - by Dave

  I'm looking for a site / report / something that can compares "identical" programs (programs that do the same thing) in different web-programming languages and then compares the speeds of each of them. I agree that there will be MANY MANY criteria on which this information can be sliced and diced by, but has anyone…

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• Power of programming languages

  - by Casebash

  Are there any objective measures for measuring the power of programming languages? Turing-completeness is one, but it is not particularly discriminating. I also remember there being a few others measures of power which are more limited versions (like finite-state-autonoma), but is there any objective measure that is…

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• How to choose programming language for projects?

  - by bdhar

  This is a question I constantly encounter when I attend any technical forums / discussions / interviews. There is a similar article but it focuses on business merits as well. What I am looking for is a guide (not a checklist like this one which is abstract and not so accurate) which helps an architect to choose the…

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• why "Using Goto" is bad programming ? [closed]

  - by Yogesh

  Possible Duplicates: Why is goto poor practise? GOTO still considered harmful? Hi, I have read in many book that using goto is bad programming practice, why is it so? thanks Yogesh

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• Ideas for student parallel programming project

  - by chi42

  I'm looking to do a parallel programming project in C (probably using pthreads or maybe OpenMP) for a class. It will done by a group of about four students, and should take about 4 weeks. I was thinking it would be interesting to attack some NP-complete problem with a more complex algorithm like a genetic algo with…

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• Link list usage in system programming

  - by Pwn

  Hi, in spite of having so many efficient data structures, why is only linked list used so heavily in systems programming? Is it because it allows least usage of heap/less buggy code? Regards, Pwn

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• How to gather information on windows shell programming?

  - by terrani

  Hi, I am very interested in learning windows shell programming. So...I searched for books on the amazon.com. I see that books on the amazon.com are out of date. Most of books are published before 2005. I googled about it and found many tips and tricks, but not step by step guide. Where do I get started?

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• Which programming languages support constant methods?

  - by Derek Mahar

  Which programming languages other than C++ support the concept of a constant class method? That is, what languages allow the programmer to constrain a method in such a way that it is guaranteed not to change the state of an object to which the method is applied? Please provide examples or references in your…

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