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  • Should we rename overloaded methods?

    - by Mik378
    Assume an interface containing these methods : Car find(long id); List<Car> find(String model); Is it better to rename them like this? Car findById(long id); List findByModel(String model); Indeed, any developer who use this API won't need to look at the interface for knowing possible arguments of initial find() methods. So my question is more general : What is the benefit of using overloaded methods in code since it reduce readability?

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  • Managing Multiple dedicated servers centrally using a Web GUI tools?

    - by Sampath
    Application Architecture I am having a single ruby on rails application code running with multiple instances (ie. each client having identical sub domains) running on a multiple dedicated server using phusion passenger + nginx. sub domains setup done using vhost option in nginx passenger module. For Example server 1 serving 1 - 100 client with identical sub domains www.client1.product.com upto www.client100.product.com server 2 serving 101 - 200 client with identical sub domains www.client101.product.com upto www.client200.product.com server 3 serving 201 - 300 client with identical sub domains www.client201.product.com upto www.client300.product.com What my question is i need to centrally manage all my N dedicated servers using an gui tool I am looking for Web GUI tool to manage tasks like 1) backup all mysql databases automatically from all dedicated servers and send it to an some FTP backup drive 2) back files and folders from all dedicated servers and send it to an some FTP backup drive 3) need to manage firewall (CSF http://configserver.com/cp/csf.html) centrally for all dedicated servers 4) look to see server load , bandwidth used in graphical manner for all N no of dedicated servers Note: I am prefer to looking for an open source solution

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  • Why do you need float/double?

    - by acidzombie24
    I was watching http://www.joelonsoftware.com/items/2011/06/27.html and laughed at Jon Skeet joke about 0.3 not being 0.3. I personally never had problems with floats/decimals/doubles but then I remember I learned 6502 very early and never needed floats in most of my programs. The only time I used it was for graphics and math where inaccurate numbers were ok and the output was for the screen and not to be stored (in a db, file) or dependent on. My question is, where are places were you typically use floats/decimals/double? So I know to watch out for these gotchas. With money I use longs and store values by the cent, for speed of an object in a game I add ints and divide (or bitshift) the value to know if I need to move a pixel or not. (I made object move in the 6502 days, we had no divide nor floats but had shifts). So I was mostly curious.

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  • What discipline does Computer Science belong to?

    - by Macneil
    Is Computer Science science, applied mathematics, engineering, art, philosophy? "Other"? To provide background, here is Steven Wartik's blog posting for Scientific American titled "I'm not a real scientist, and that's okay." The article covers some good topics for this question, but it leaves open more than it answers. If you can think of the discipline, how would computer science fit into its definition? Should the discipline for Computer Science be based on what programmers do, or what academics do? What kind of answers do you get from people who've seemed to think deeply about this? What reasons do they give?

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  • Different behaviour with windows authentication on IIS7 websites

    - by amaters
    I need to run a website with just windows authentication. Given the following situation: The location of the default website is: c:\inetpub\wwwroot The location of my code is: c:\Sites\WebApp my hostfile is edited so any .local i use points to 127.0.0.1 I have created a new application called 'AppX' underneath the default website and point it to c:\Sites\WebApp. It will use the DefaultappPool. When I switch off anonymous and switch on windows authentication all works well when I go to localhost/AppX/. What i really want is a new website (No need to question why I want this). So I created Website2 and did exact the same creation of the application. Everything is the same; destination, app pool and authentication. Now when I browse to this website web2.local/AppX/ I get the 401.2 - Unauthorized error. What am I missing here?

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  • When should I use—and not use—design patterns?

    - by ashmish2
    In a previous question of mine on Stack Overflow, FredOverflow mentioned in the comments: Note that patterns do not magically improve the quality of your code. and Any measure of quality you can imagine. Patterns are not a panacea. I once wrote a Tetris game with about 100 classes that incorporated all the patterns I knew at the time. Why use a simple if/else if you can use a pattern? OO is good, and patterns are even better, right? No, it was a terrible, over-engineered piece of crap. I am quite confused by these comments: I know design patterns help to make code reusable and readable, but when should I use use design patterns and perhaps more importantly, when should I avoid getting carried away with them?

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  • Compound assignment operators in Python's Numpy library

    - by Leonard
    The "vectorizing" of fancy indexing by Python's numpy library sometimes gives unexpected results. For example: import numpy a = numpy.zeros((1000,4), dtype='uint32') b = numpy.zeros((1000,4), dtype='uint32') i = numpy.random.random_integers(0,999,1000) j = numpy.random.random_integers(0,3,1000) a[i,j] += 1 for k in xrange(1000): b[i[k],j[k]] += 1 Gives different results in the arrays 'a' and 'b' (i.e. the appearance of tuple (i,j) appears as 1 in 'a' regardless of repeats, whereas repeats are counted in 'b'). This is easily verified as follows: numpy.sum(a) 883 numpy.sum(b) 1000 It is also notable that the fancy indexing version is almost two orders of magnitude faster than the for loop. My question is: "Is there an efficient way for numpy to compute the repeat counts as implemented using the for loop in the provided example?"

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  • Comment nommer la plus grande unité de mesure mathématique, après le yotta ? "Hella", propose un étu

    Comment nommer la plus grande unité de mesure mathématique, après le yotta ? "Hella", propose un étudiant américain Austin Sendek est un étudiant californien inscrit dans une filière consacrée à la physique. Et, depuis quelques semaines, une question hante son esprit : quel nom donner à l'unité de mesure venant après mega, giga, etc ? Le système international d'unités dispose d'une série de préfixes pour désigner l'échelle mathématique de l'unité qui est mesuré. Il y a méga, puis giga, puis téra, et enfin peta. A ce jour, la plus grande unité de mesure est le yotta, qui équivaut à 10 puissance 24. Le prochain préfixe, si l'on suit la logique de ceux existants, devrait dénommer 10 puissance 27. Problème : au...

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  • Spam prevention through IP tracking

    - by whamsicore
    I am building a website with user generated comments. In order to implement user moderation/spam-protection, users have the ability to mark comments as spam. When one comment is marked as spam, I want all comments from the same IP address to be deleted. I am not familiar with spam prevention in general, other than Captcha. Question: is this a feasible/good system for spam prevention? are there better ways, or improvements I can make? Thanks.

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  • How do I set up a virtual network interface with its own IP address?

    - by Stefano Palazzo
    I vaguely remember that it's possible to set up virtual network interfaces with their own IP addresses, using only one physical network connection. I can find a few guides on the internet that recommend setting these up in /etc/network/interfaces, but Ubuntu doesn't use this file. Therefore my question: What's the correct way of setting these up in recent versions of Ubuntu? As this is a laptop, and I need it to connect to all kinds of different networks, I want to keep the network manager and all its configuration. To be more clear: at the end of this, I want to have a new network interface (e.g. "eth42") with its own IP address, but using whatever is connected in network manager to send the actual packets. In NM, it should appear as if I just had a second ethernet adapter installed in my system.

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  • Sources (other than tutorials) on Game Mechanics

    - by Holland
    But, I'm not quite sure where I should start from here. I know I have to go and grab an engine to use with some prebuilt libraries, and then from there learn how to actually code a game, etc. All I have right now is some "program Tetris" tutorial for C++ open right now, but I'm not even sure if that will really help me with what I want to accomplish. I'm curious if there are is any good C++ documentation related to game development which provides information on building a game in more of a component model (by this I'm referring to the documentation, not the actual object-oriented design of the game itself), rather than an entire tutorial designed to do something specific. This could include information based on various design methodologies, or how to link hardware with OpenGL interfaces, or just simply even learning how to render 2D images on a canvas. I suppose this place is definitely a good source :P, but what I'm looking for is quite a bit of information - and I think posting a new question every ten minutes would just flood the site...

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  • Applicability of the Joel Test to web development companies

    - by dreftymac
    QUESTION: How can you re-write the questions of the Joel test to apply to web developers? 1. Do you use source control? (source control for all aspects of your app, including configuration, database and user-based settings?) 2. Can you make a build in one step? (can you deploy a site from staging to prod in 1 step?) ... 10. Do you have testers? (how do you test AJAX and CSS?) BACKGROUND: This is for people who work in a shop that does some web development but also uses some off-the-shelf tools like Drupal and Wordpress, but doing custom development on top of that. RELATED LINKS: http://www.joelonsoftware.com/articles/fog0000000043.html What do you think about the Joel Test?

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  • How does Google maintain its codes?

    - by John Maxim
    Pagerank algorithm is not revealed to any of their associates programmers, but only accessible by Larry Page or maybe Sergey Brin. I wonder how do they go about managing their coding? There are times when you need to build something up and you may need more hands to help with coding, but you may also want to keep some secrets to yourself, I'm not saying I have secrets, but I wonder how do they manage their coding. I'm sure there are some ways to do it decently and professionally. The reason why friendster failed was because one of the factors they lost control over their coding part. I think this is an interesting question. But not easy to answer, maybe only a marginal knew.

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  • Visualize flowchart diagram with multiple end symbols

    - by platzhirsch
    I am looking for a standardize way to visualize the following hierarchical logic: The state of the thread is represented by the answers to the hierarchical set of question You can read this listing like a flowchart, you iterate over the questions decide, go one step deeper and so on. Therefore I thought the best way to visualize it, using a flowchart. The problem is, in this hierarchical set it is possible to end in more than one state and its totally valid. I have never seen a flowchart where you can enter more than one state. Is it still possible and I am missing the right symbol to present this logic or are flowchart not fitting anyway? What other graphical representation could I use, is there something fitting in UML? A non-deterministic state machine seems not to be intuitive enough, transfering it into a deterministic state machine would result in to many states, and so on.

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  • Keeping crosshairs & GUI onscreen - SFML

    - by nihohit
    I read this question, but didn't understand the implementation suggestions with SFML on c#. For example, right now I'm just trying to make sure that the mouse crosshairs stay onscreen constatnly. I tried using this code: View lastView = this._mainWindow.GetView(); this._mainWindow.SetView(this._mainWindow.DefaultView); this._mainWindow.Draw(crosshair); this._mainWindow.SetView(lastView); after drawing all other sprites and before call this._mainWindow.display(), when beforehand I set crosshair.Position based on its position relative to the window, not the view. This just keeps the screen locked and prevents screen scrolling. Any suggestions?

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  • Virtualbox: host only networking - proxy internet connection

    - by Russell
    I'll ask my question first, then give details about where I am coming from: Is it possible to use host only, then have ubuntu act as a proxy to provide internet access to windows? If so, how? I am trying to get the right combination of networking for my virtualbox windows client VM (win7). My host is ubuntu 10.10 (maverick). I believe I understand the basic network options (please correct me if I am incorrect): NAT - Host can't communicate with guest but guest has access to all host's adapters Host only - Separate adapter but guest has no net access Bridged - bridge an adapter in the host with the virtual adapter to give the host access to the host adapter I am trying to give my win guest internet access, but also access the host in a separate network. Bridged only works when the host is connected to the internet (this is a laptop) so when it's not connected the network is down. Thanks I appreciate your help.

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  • What are the leading professional journals in software development?

    - by Austin Hyde
    In one of my classes, we were asked to research the top professional journals in our field. According to what I can dig up, the ACM and IEEE journals are the "best", as they come up at the top of my searches and this question. However, there are a dozen or so individually topic-ed journals for each, with no very clear measure of which one is most useful, popular, etc. For example, "IEEE Software" vs. "IEEE Transactions on Software Engineering". So, what do you consider to be the "leading" professional journals (specifically), and why? It doesn't have to be only ACM or IEEE, either. If you know of another, please add it.

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  • Problem importing Firefox bookmarks to Chromium

    - by RPi Awesomeness
    I would like to switch from Firefox to Chromium (it seems to be faster for my system) and I have a large number of bookmarks I would like to import into Chromium. I looked at this question: Can I sync bookmarks between Firefox and Chromium? but that seemed to be specific to Firefox Sync, which I don't have. I just want to import my bookmarks from Firefox into Chromium. However, when I go to the Customize and Control button and then choose the option Import Bookmarks and Settings under the Bookmarks menu item, it gives me this: I have Firefox and Chromium as up to date as the official repositories (I believe), so I really have no clue what is going on. I have attempted to import directly from HTML, but it only imports the first set of bookmarks, nothing beyond that (where all of the bookmarks I really want are.) Can I import the JSON Firefox backup file into Chromium, or am I stuck manually entering all of these bookmarks into Chromium? Thanks!

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  • Virtual Brown Bag Recap: JB's New Gem, Patterns 101, Killing VS, CodeMav

    - by Brian Schroer
    At this week's Virtual Brown Bag meeting: JB showed off his new SpeakerRate Ruby gem Claudio alerted us to the Refactoring Manifesto We answered the question "How do I get started with Design Patterns?" Ever had to kill a frozen instance of Visual Studio? Yeah, I thought so. Claudio showed us how to do it with PowerShell. (It's faster) JB previewed his new CodeMav web site, which will be a social network for developers (integration with Speaker Rate, slide share, github, StackOverflow, etc.) For detailed notes, links, and the video recording, go to the VBB wiki page: https://sites.google.com/site/vbbwiki/main_page/2011-01-06

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  • What are Silverlight, WCF RIA services or applications?

    - by Pankaj Upadhyay
    I asked a question here on programmers yesterday about learning HTML & CSS and the community was pretty generous to provide great answers. One of the answers was given by Emmad Kareem and that was : "if you can't do HTML, don't give up. Consider using Silverlight". This answer made me visit Silverlight.net and I came across the terms WCF RIA Services, Silverlight applications. After going through the website and some articles on website i am unable to draw a conclusive understanding on what this is all about. Is this another way of building websites using .NET, and is just like another framework like ASP.NET MVC3. What scenario's and requirements are basically targeted to silverlight applications or we are free to use either of Asp.net MVC or Silverlight in any web-application requirements.

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  • Is it Okay to use Natty kernel in Lucid system?

    - by Anwar Shah
    I have seen some people saying to install the kernel of Ubuntu 11.04 (probably 2.6.38..) to use on Ubuntu 10.04 (2.6.35...may be) to only be able to use a Wimax device driver without upgrading their whole Ubuntu System. I find in this method something wrong, but I cannot argue as they are saying that it is OK!!. I tried to insist to upgrade to the latest Ubuntu version with all the software. But I also have the question myself : Does upgrading only the kernel is Okay ? or in other words, Is it OK to have Lucid (10.04) system with Natty(11.04) kernel (by adding Natty's repository and removing it after upgrade). What are the possible problems ? What about using Precises' kernel in Lucid system?

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  • Why not Green Threads?

    - by redjamjar
    Whilst I know questions on this have been covered already (e.g. http://stackoverflow.com/questions/5713142/green-threads-vs-non-green-threads), I don't feel like I've got a satisfactory answer. The question is: why don't JVM's support green threads anymore? It says this on the code-style Java FAQ: A green thread refers to a mode of operation for the Java Virtual Machine (JVM) in which all code is executed in a single operating system thread. And this over on java.sun.com: The downside is that using green threads means system threads on Linux are not taken advantage of and so the Java virtual machine is not scalable when additional CPUs are added. It seems to me that the JVM could have a pool of system processes equal to the number of cores, and then run green threads on top of that. This could offer some big advantages when you have a very number large of threads which block often (mostly because current JVM's cap the number of threads). Thoughts?

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  • Are there any empirical studies on the effect of different languages on software quality?

    - by jgre
    The proponents of functional programming languages assert that functional programming makes it easier to reason about code. Those in favor of statically typed languages say that their compilers catch enough errors to make up for the additional complexity of type systems. But everything I read on these topics is based on rational argument, not on empirical data. Are there any empirical studies on what effects the different categories of programming languages have on defect rates or other quality metrics? (The answers to this question seem to indicate that there are no such studies, at least not for the dynamic vs. static debate)

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  • Delete corrupted folder

    - by Peter Becich
    I am trying to delete a folder in my home directory; its name is completely garbled. In Nautilus, the garbled text is followed by 'Invalid Directory.' Deleting it with Nautilus stalls; I can't type in the garbled name in the terminal. peter@io_vbox:~$ ls -lbdR * ... drwxrwxr-x 3 peter peter 4096 Jul 28 15:19 \346>\3152\357+\332)\363*\356,\253-\277+H&\266\033z\v\373\366\340\340?\314\022\274P\262\003\260?\303p\326\342\351\214\374f\016X\036r)!.\026 ... Any ideas? Running 12.04; if it's of any importance, this is running in VirtualBox on a Macbook Air. It was installed through VirtualBox. I don't have any other signs of SSD failure that I've picked up on -- referring to this question: Random files (invalid encoding) appearing in home directory Thanks

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  • Structured work-environment in comparison to an unstructured one [closed]

    - by Phoenix
    I was asked in an interview whether the environment I work in is structured or unstructured. I believe at their end it is unstructured. How will my answer hurt or help my chances at the company ? And what is it intent of this question ? The place where I work it is structured in terms of the technologies we use but all of us work pretty independently on the individual problem. Is this a sufficient explanation. What individual areas I can highlight to support my answer ?

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