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  • Software Developer Interview Question - Fair or Unfair

    - by user607018
    I just phone interviewed with a company for a graduate software developer position and was asked the following questions. I should add that the company concerned are not a database vendor. How does a query optimiser work? If a database was performing badly how would you use the performance logs to find out the problem. I have asked whether they ask such questions of all candidate software developers (graduate or experienced) in a first phone interview. They replied that they like to test their candidates knowledge of database development. I want to write to the company to say that these questions are unreasonable to ask at a software developer interview and to request that my interview be done over. I would like to check the reasonableness of the following assumptions a) Those questions cannot be fairly classified as database development questions. b) I think the questions are appropriate for a DBA interview but wholly unreasonable for a software developer interview (experienced or not). c) The first question is only relevant to a database vendor. d) The second question is not fair because software developers typically don't deal with database performance logs as that is the job of the DBA. Perhaps some of you will be kind enough to comment on my assumptions or may have any other suggestions, before I write to the company.

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  • WPF TextBlock refresh in real time

    - by TheOnlyBrien
    I'm new to C#, in fact, this is one of the first projects I've tried to start on my own. I am curious why the TextBlock will not refresh with the following code? The WPF window does not even show up when I add the "while" loop to the code. I just want this to have a real time display of the days since I was born. Please help me out or give me constructive direction. using System; using System.Collections.Generic; using System.Linq; using System.Text; using System.Threading.Tasks; using System.Windows; using System.Windows.Controls; using System.Windows.Data; using System.Windows.Documents; using System.Windows.Input; using System.Windows.Media; using System.Windows.Media.Imaging; using System.Windows.Navigation; using System.Windows.Shapes; namespace daysAliveWPF { /// <summary> /// Interaction logic for MainWindow.xaml /// </summary> public partial class MainWindow : Window { public MainWindow() { InitializeComponent(); DateTime myBirthday = new DateTime(1984, 01, 19); while (true) { TimeSpan daysAlive = DateTime.Now.Subtract(myBirthday); MyTextBlock.Text = daysAlive.TotalDays.ToString(); } } } } Similar code has worked in a Console Window application, so I don't understand what's going on here. Console Application code snip that did work is: using System; using System.Collections.Generic; using System.Linq; using System.Text; using System.Threading.Tasks; namespace DisplayRealTime { class Program { static void Main(string[] args) { DateTime myBirthday = new DateTime(1984, 06, 19); while (true) { TimeSpan daysAlive = DateTime.Now.Subtract(myBirthday); Console.Write("\rTotal Days Alive: {0}", daysAlive.TotalDays.ToString(".#####")); } } } } Thank you!

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  • Why does editor color scheme preference seem to vary by language?

    - by Carl Manaster
    I've spent most of my career in C++ and Java, and like most of my peers I have the editor configured to display dark (black with dark-colored syntax highlighting) on a white background. I spent a day this week with Rubyists, and they all seem to favor light text on a dark background. I've observed this before. Why is it? What cultural differences between the Java and Ruby communities explain it? Or is it as simple as these are the default settings for our respective editors?

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  • Do software developers know what engineers actually do?

    - by lorin
    Software development is often contrasted with the traditional branches of engineering, most commonly civil or mechanical engineering. For example: "Software development isn't like engineering, it's like craftsmanship!" "Software development isn't like engineering, but it should be!" Do software developers understand what it is that engineers do and how they do it? At least, do they understand it well enough to be able to make an informed comparison with what software developers do?

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  • How to implement jquery and Mootools together ?

    - by Avi Kumar Manku
    I am developing a website in which I am implementing two slider for images gallery using one with jQuery and one with moottools. But there is problem in implementing these because when I use both together the jQuery slider doesn't works where mootools slider works. jQuery slider works in case where I remove mootools. What should I do to implement both sliders together? Any suggestions will be helpful. <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> <html xmlns="http://www.w3.org/1999/xhtml"> <head> <meta http-equiv="Content-Type" content="text/html; charset=utf-8" /> <title>Tresmode | Footwear &amp; Accessories</title> <script type="text/javascript" src="js/jquery-1.5.min.js"></script> <script src="js/jquery.easing.1.3.js" type="text/javascript"></script> <script src="js/jquery.slideviewer.1.2.js" type="text/javascript"></script> <!-- Syntax hl --> <script src="js/jquery.syntax.min.js" type="text/javascript" charset="utf-8"></script> <script type="text/javascript"> $(window).bind("load", function() { $("div#mygaltop").slideView({toolTip: true, ttOpacity: 0.5}); $("div#mygalone").slideView(); //if leaved blank performs the default kind of animation (easeInOutExpo, 750) $("div#mygaltwo").slideView({ easeFunc: "easeInOutBounce", easeTime: 2200, toolTip: true }); $("div#mygalthree").slideView({ easeFunc: "easeInOutSine", easeTime: 100, uiBefore: true, ttOpacity: 0.5, toolTip: true }); }); $(function(){ $.syntax({root: 'http://www.gcmingati.net/wordpress/wp-content/themes/giancarlo-mingati/js/jquery-syntax/'}); }); </script> <link href="css/style.css" rel="stylesheet" type="text/css" /> <link href="css/product.css" rel="stylesheet" type="text/css" /> <link href="css/scroll.css" rel="stylesheet" type="text/css" /> <!--[if lte IE 8]> <link href="css/ieonly.css" rel="stylesheet" type="text/css" /> <![endif]--> <script language="javascript" type="text/javascript" src="js/mootools-1.2-core.js"></script> <script language="javascript" type="text/javascript" src="js/mootools-1.2-more.js"></script> <script language="javascript" type="text/javascript" src="js/SlideItMoo.js"></script> <script language="javascript" type="text/javascript"> window.addEvent('domready', function(){ /* thumbnails example , links only */ new SlideItMoo({itemsVisible:5, // the number of thumbnails that are visible currentElement: 0, // the current element. starts from 0. If you want to start the display with a specific thumbnail, change this thumbsContainer: 'thumbs', elementScrolled: 'thumb_container', overallContainer: 'gallery_container'}); /* thumbnails example , div containers */ new SlideItMoo({itemsVisible:5, // the number of thumbnails that are visible currentElement: 0, // the current element. starts from 0. If you want to start the display with a specific thumbnail, change this thumbsContainer: 'thumbs2', elementScrolled: 'thumb_container2', overallContainer: 'gallery_container2'}); /* banner rotator example */ new SlideItMoo({itemsVisible:1, // the number of thumbnails that are visible showControls:0, // show the next-previous buttons autoSlide:2500, // insert interval in milliseconds currentElement: 0, // the current element. starts from 0. If you want to start the display with a specific thumbnail, change this transition: Fx.Transitions.Bounce.easeOut, thumbsContainer: 'banners', elementScrolled: 'banner_container', overallContainer: 'banners_container'}); }); </script> </head> <body> <div id="landing"> <!-- landing page menu --> <div id="landing_menu"> <ul> <li><a class="active" href="#">SPECIALS</a></li> <li><a href="#">SHOP MEN'S</a></li> <li class="none"><a class="none" href="#">SHOP WOMEN'S</a></li> </ul> </div> <!-- landing page menu --> <!-- loading container menu --> <div id="container_part"> <div id="big_image_slider"> <!-- <img src="images/briteloves.png" alt="Britelove" /> --> <div id="mygaltop" class="svw"> <ul> <li><img alt="Tresmode | Footwear &amp; Accessories" src="images/briteloves.png" /></li> <li><img alt="Tresmode | Footwear &amp; Accessories" src="images/1.jpg" /></li> <li><img alt="Tresmode | Footwear &amp; Accessories" src="images/2.jpg" /></li> <li><img alt="Tresmode | Footwear &amp; Accessories" src="images/3.jpg" /></li> <li><img alt="Tresmode | Footwear &amp; Accessories" src="images/4.jpg" /></li> <li><img alt="Tresmode | Footwear &amp; Accessories" src="images/5.jpg" /></li> <li><img alt="Tresmode | Footwear &amp; Accessories" src="images/6.jpg" /></li> <li><img alt="Tresmode | Footwear &amp; Accessories" src="images/7.jpg" /></li> <li><img alt="Tresmode | Footwear &amp; Accessories" src="images/8.jpg" /></li> <li><img alt="Tresmode | Footwear &amp; Accessories" src="images/9.jpg" /></li> <li><img alt="Tresmode | Footwear &amp; Accessories" src="images/10.jpg" /></li> <li><img alt="Tresmode | Footwear &amp; Accessories" src="images/11.jpg" /></li> <li><img alt="Tresmode | Footwear &amp; Accessories" src="images/12.jpg" /></li> </ul> </div> </div> <div class="new_style_banner"><img src="images/new_styles.png" alt="new style" /></div> <div class="new_style_banner"><img src="images/ford-super-models.png" alt="ford super models" /></div> </div> <!--- loading container menu --> <!-- footer scrool ---> <div id="footer_scroll"> <!--thumbnails slideshow begin--> <div id="gallery_container"> <div id="thumb_container"> <div id="thumbs"> <a href="gallery/full/DC080302018.jpg" rel="lightbox[galerie]" target="_blank"><img src="gallery/thumb/1.jpg"/></a> <a href="gallery/full/DC080302028.jpg" rel="lightbox[galerie]" target="_blank"><img src="gallery/thumb/2.jpg" /></a> <a href="gallery/full/DC080302030.jpg" rel="lightbox[galerie]" target="_blank"><img src="gallery/thumb/3.jpg"/></a> <a href="gallery/full/DC080302018.jpg" rel="lightbox[galerie]" target="_blank"><img src="gallery/thumb/4.jpg" /></a> <a href="gallery/full/DC080302028.jpg" rel="lightbox[galerie]" target="_blank"><img src="gallery/thumb/5.jpg" /></a> <a href="gallery/full/DC080302030.jpg" rel="lightbox[galerie]" target="_blank"><img src="gallery/thumb/6.jpg"/></a> <a href="gallery/full/DC080302018.jpg" rel="lightbox[galerie]" target="_blank"><img src="gallery/thumb/1.jpg"/></a> <a href="gallery/full/DC080302028.jpg" rel="lightbox[galerie]" target="_blank"><img src="gallery/thumb/2.jpg" /></a> <a href="gallery/full/DC080302030.jpg" rel="lightbox[galerie]" target="_blank"><img src="gallery/thumb/7.jpg"/></a> <a href="gallery/full/DC080302018.jpg" rel="lightbox[galerie]" target="_blank"><img src="gallery/thumb/8.jpg" /></a> <a href="gallery/full/DC080302028.jpg" rel="lightbox[galerie]" target="_blank"><img src="gallery/thumb/9.jpg" /></a> <a href="gallery/full/DC080302030.jpg" rel="lightbox[galerie]" target="_blank"><img src="gallery/thumb/10.jpg"/></a> </div> </div> </div> <!--thumbnails slideshow end--> </div> <!-- foooter scrooll --> </div> <script type="text/javascript"> var gaJsHost = (("https:" == document.location.protocol) ? "https://ssl." : "http://www."); document.write(unescape("%3Cscript src='" + gaJsHost + "google-analytics.com/ga.js' type='text/javascript'%3E%3C/script%3E")); </script> <script type="text/javascript"> var pageTracker = _gat._getTracker("UA-2064812-2"); pageTracker._initData(); pageTracker._trackPageview(); </script> </body> </html>

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  • Is it possible to implement an infinite IEnumerable without using yield with only C# code?

    - by sinelaw
    This isn't a practical problem, it's more of a riddle. Problem I'm curious to know if there's a way to implement something equivalent to the following, but without using yield: IEnumerable<T> Infinite<T>() { while (true) { yield return default(T); } } Rules You can't use the yield keyword Use only C# itself directly - no IL code, no constructing dynamic assemblies etc. You can only use the basic .NET lib (only mscorlib.dll, System.Core.dll? not sure what else to include). However if you find a solution with some of the other .NET assemblies (WPF?!), I'm also interested. Don't implement IEnumerable or IEnumerator. Notes The closest I've come yet: IEnumerable<int> infinite = null; infinite = new int[1].SelectMany(x => new int[1].Concat(infinite)); This is "correct" but hits a StackOverflowException after 14399 iterations through the enumerable (not quite infinite). I'm thinking there might be no way to do this due to the CLR's lack of tail recursion optimization. A proof would be nice :)

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  • Structuring database for multi-object "activity" and "following" functionalities

    - by romaninsh
    I am working on a web application which operate with different types of objects such as user, profiles, pages etc. All objects have unique object_id. When objects interact it may produce "activity", such as user posting on the page or profile. Activity may be related to multiple objects through their object_id. Users may also follow "objects" and they need to be able to see stream of relevant activity. Could you provide me with some data structure suggestions which would be efficient and scalable? My goal is to show activity limited to the objects which user is following I am not limited by relational databases. Update As I'm getting advices on ORM and how index things, I'd like to again, stress my question. According to my current design model the database structure looks like this: As you can see - it's quite easy to implement database like that. Activity and Follower tables do contain much larger amount of records than the upper level but it's tolerable. But when it comes for me to create a "timeline" table, it becomes a nightmare. For every user I need to reference all the object activities which he follows. In terms of records it easily gets out of control. Please suggest me how to change this structure to avoid timeline creation and also be abel to quickly retrieve activity for any given user. Thanks.

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  • Please recommend a good book on general IT for junior developer

    - by Rachel
    I have just got a job as a junior java developer and I am finding learning the code fine as I taught myself to pass the interview tests, trouble is I have a biology degree and know little about general IT and computer /network jargon. I don't want to be seen as a total idiot and non - techie so please can you recommend a book I can read / study to quickly increase my general background knowledge so that I can compete on a level with IT graduates!

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  • How can I make my FireFox Browser AddOn Backwards Compatible?

    - by bwheeler96
    I'm making a firefox browser add-on, and I just got all of the code working fine, but it will only install in FireFox 16, and I want it to be compatible at least from 10+, has anyone dealt with this issue? I have my package.json pointing to my install.rdf, and my install.rdf clearly states target applications. Is there any additional setup I need? here is my package.json { "name": "firefox-ext", "license": "MPL 2.0", "author": "", "version": "0.1", "fullName": "firefox-ext", "id": "jid1-AMCw25iQJof53w", "description": "a basic add-on" } and here is my install.rdf. <?xml version="1.0"?> <RDF xmlns="http://www.w3.org/1999/02/22-rdf-syntax-ns#" xmlns:em="http://www.mozilla.org/2004/em-rdf#"> <Description about="urn:mozilla:install-manifest"> <em:id>jid1-AMCw25iQJof53w</em:id> <em:name>Generic App</em:name> <em:version>1.0</em:version> <em:type>2</em:type> <em:creator>Brian Wheeler</em:creator> <em:description>Good Stuff</em:description> <em:targetApplication> <Description> <em:id>{ec8030f7-c20a-464f-9b0e-13a3a9e97384}</em:id> <em:minVersion>1.0</em:minVersion> <em:maxVersion>19.0</em:maxVersion> </Description> </em:targetApplication> </Description> </RDF> I'm using the CFX CLI Tools to make this, so everything has been built and tested with cfx init, cfx run, and cfx xpi I just can't figure out compatibility with anything other than 16. Also, major bonus points if someone could explain the advantages of a rapid release cycle, because it really seems to have shot 3rd party Mozilla developers in the foot in terms of software compatibility. Thanks, -Brian

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  • .net Interviews

    - by pdiddy
    When interviewing a .net candidate what do you look for? Let's say for a senior candidate. What kind of memorable interview have you experience, good or bad? This is going to be my first time I'll be the Interviewer. This is my second job and so I haven't got a lot of interview experience. Sure I can ask lots of .net technical questions, but what other questions can I ask and what can it bring by asking that question? Thanks,

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  • How do you approach database design?

    - by bron
    I am primarily a web developer and I have a couple of personal projects which I want to kick off. One thing that is bugging me is database design. I have gone through in school db normalization and stuff like that but it has been a couple of years ago and I have never had experience with relational database design except for school. So how you do you approach database from a web app perspective? How do you begin and what do you look out for? What are flags for caution?

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  • Why and when should I make a class 'static'? What is the purpose of 'static' keyword on classes?

    - by Saeed Neamati
    The static keyword on a member in many languages mean that you shouldn't create an instance of that class to be able to have access to that member. However, I don't see any justification to make an entire class static. Why and when should I make a class static? What benefits do I get from making a class static? I mean, after declaring a static class, one should still declare all members which he/she wants to have access to without instantiation, as static too. This means that for example, Math class could be declared normal (not static), without affecting how developers code. In other words, making a class static or normal is kind of transparent to developers.

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  • Manager/Container class vs static class methods

    - by Ben
    Suppose I a have a Widget class that is part of a framework used independently by many applications. I create Widget instances in many situations and their lifetimes vary. In addition to Widget's instance specified methods, I would like to be able to perform the follow class wide operations: Find a single Widget instance based on a unique id Iterate over the list of all Widgets Remove a widget from the set of all widgets In order support these operations, I have been considering two approaches: Container class - Create some container or manager class, WidgetContainer, which holds a list of all Widget instances, support iteration and provides methods for Widget addition, removal and lookup. For example in C#: public class WidgetContainer : IEnumerable<Widget { public void AddWidget(Widget); public Widget GetWidget(WidgetId id); public void RemoveWidget(WidgetId id); } Static class methods - Add static class methods to Widget. For example: public class Widget { public Widget(WidgetId id); public static Widget GetWidget(WidgetId id); public static void RemoveWidget(WidgetId id); public static IEnumerable<Widget AllWidgets(); } Using a container class has the added problem of how to access the container class. Make it a singleton?..yuck! Create some World object that provides access to all such container classes? I have seen many frameworks that use the container class approach, so what is the general consensus?

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  • Best Practices and Etiquette for Setting up Email Notifications

    - by George Stocker
    If you were going to set up a Email Alerts for the customers of your website to subscribe to, what rules of etiquette ought to be followed? I can think of a few off the top of my head: Users can Opt-Out Text Only (Or tasteful Remote Images) Not sent out more than once a week Clients have fine-grained control over what they receive emails about (Only receive what they are interested in) What other points should I consider? From a programming standpoint, what is the best method for setting up and running email notifications? Should I use an ASP.NET Service? A Windows Service? What are the pitfalls to either? How should I log emails that are sent? I don't care if they're received, but I do need to be able to prove that I did or did not send an email.

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  • Where to Perform Authentication in REST API Server?

    - by David V
    I am working on a set of REST APIs that needs to be secured so that only authenticated calls will be performed. There will be multiple web apps to service these APIs. Is there a best-practice approach as to where the authentication should occur? I have thought of two possible places. Have each web app perform the authentication by using a shared authentication service. This seems to be in line with tools like Spring Security, which is configured at the web app level. Protect each web app with a "gateway" for security. In this approach, the web app never receives unauthenticated calls. This seems to be the approach of Apache HTTP Server Authentication. With this approach, would you use Apache or nginx to protect it, or something else in between Apache/nginx and your web app? For additional reference, the authentication is similar to services like AWS that have a non-secret identifier combined with a shared secret key. I am also considering using HMAC. Also, we are writing the web services in Java using Spring. Update: To clarify, each request needs to be authenticated with the identifier and secret key. This is similar to how AWS REST requests work.

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  • Do you think natively compiled languages have reached their EOL?

    - by Yuval A
    If we look at the major programming languages in use today it is pretty noticeable that the vast majority of them are, in fact, interpreted. Looking at the largest piece of the pie we have Java and C# which are both enterprise-ready, heavy-duty, serious programming languages which are basically compiled to byte-code only to be interpreted by their respective VMs (the JVM and the CLR). If we look at scripting languages, we have Perl, Python, Ruby and Lua which are all interpreted (either from code or from bytecode - and yes, it should be noted that they are absolutely not the same). Looking at compiled languages we have C which is nowadays used in embedded and low-level, real-time environments, and C++ which is still alive and kicking, when you want to get down to serious programming as close to the hardware as you can, but still have some nice abstractions to help you with day to day tasks. Basically, there is no real runner-up compiled language in the distance. Do you feel that languages which are natively compiled to executable, binary code are a thing of the past, taken over by interpreted languages which are much more portable and compatible? Does C++ mark an end of an era? Why don't we see any new compiled languages anymore? I think I should clarify: I do not want this to turn into a "which language is better" discussion, because that is not the issue at hand. The languages I gave as example are only examples. Please focus on the question I raised, and if you disagree with my statement that compiled languages are less frequent these days, that is totally fine, I am more than happy to be proved mistaken.

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  • Small projects using the cathedral model: does open-source lower security?

    - by Anto
    We know of Linus' law: With enough eyeballs all bugs are shallow In general, people seem to say that open-source software is more secure because of that very thing, but... There are many small OSS projects with just 1 or 2 developers (the cathedral model, as described by ESR). For these projects, does releasing the source-code actually lower the security? For projects like the Linux kernel there are thousands of developers and security vulnerabilities are quite likely going to be found, but when just some few people look through the source code, while allowing crackers (black hat hackers) to see the source as well, is the security lowered instead of increased? I know that the security advantage closed-source software has over OSS is security through obscurity, which isn't good (at all), but it could help to some degree, at least by giving those few devs some more time (security through obscurity doesn't help with the if but with the when). EDIT: The question isn't whether OSS is more secure than non-OSS software but if the advantages for crackers are greater than the advantages for the developers who want to prevent security vulnerabilities from being exploited.

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  • SO-overflow induced passivity - how to cope?

    - by Ruben
    After not really working on my pet project for a while, I discovered Stackoverflow and upon perusing it more intensely I was quite amazed. I'm a bit of a perfectionist, so when I found eye-openers here highlighting many of the mistakes I made, I first wanted to fix everything. However, it's a pet project for a reason: I'm self-taught and I'm studying psychology, so programming skills can never become priority one (though it often helps, even in this field). Issues that stuck out were numerous security issues (e.g. CSRF-prevention and bcrypt eluded me) not object-oriented (at least the PHP part, the JS-part mostly is) no PHP framework used, so many of my DIY takes on commonly-tackled components (auth, ...) are either bad or inefficient really poor MySQL usage (no prepared statements, mysql extension, heard about setting proper indices two days ago) using mootools even though JQuery seems to be fashionable, so there's more probably always going to be better integration with services I'd like to use (like google visualization) So, my SO-induced frenzy turned into passivity. I can't do it all (soon) in the rather small amount of spare time I can spend on working on my project. I can leave some of the issues be in good conscience (speed stuff: an unfinished & unpublished project will never become popular, right?). No clear conscience without good security though and if I don't use a framework for auth and other complex stuff I'll regret having to do it myself. One obvious answer would probably be going open-source, but I think the project would need to become more impressive before others would commit to it. I can't afford to employ someone either. I do think the project deserves being worked on, though. How should I tackle it anyway? What's the best practice for little-practice people?

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  • Low coupling processing big quantities of data

    - by vitalik
    Usually I achieve low coupling by creating classes that exchange lists, sets, and maps between them. Now I am developing a batch application and I can't put all the data inside a data structure because there isn't enough memory. I have to read and process one chunk of data and then going to the next one. So having low coupling is much more difficult because I have to check somewhere if there is still data to read, etc. What I am using now is: Source - Process - Persist The classes that process have to ask to the Source classes if there are more rows to read. What are the best practices and or useful patterns in such situations? I hope I am explaining myself, if not tell me.

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  • What technologies are used for Game development now days?

    - by Monika Michael
    Whenever I ask a question about game development in an online forum I always get suggestions like learning line drawing algorithms, bit level image manipulation and video decompression etc. However looking at games like God of War 3, I find it hard to believe that these games could be developed using such low level techniques. The sheer awesomeness of such games defy any comprehensible(for me) programming methodology. Besides the gaming hardware is really a monster now days. So it stands to reason that the developers would work at a higher level of abstraction. What is the latest development methodology in the gaming industry? How is it that a team of 30-35 developers (of which most is management and marketing fluff) able to make such mind boggling games? If the question seems too general could you explain the architecture of God of War 3? Or how you would go about producing a clone? That I think should be objectively answerable.

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  • Generic and type safe I/O model in any language

    - by Eduardo León
    I am looking for an I/O model, in any programming language, that is generic and type safe. By genericity, I mean there should not be separate functions for performing the same operations on different devices (read_file, read_socket, read_terminal). Instead, a single read operation works on all read-able devices, a single write operation works on all write-able devices, and so on. By type safety, I mean operations that do not make sense should not even be expressible in first place. Using the read operation on a non-read-able device ought to cause a type error at compile time, similarly for using the write operation on a non-write-able device, and so on. Is there any generic and type safe I/O model?

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  • Can a loosely typed language be considered true object oriented?

    - by user61852
    Can a loosely typed programming language like PHP be really considered object oriented? I mean, the methods don't have returning types and method parameters has no declared type either. Doesn't class design require methods to have a return type? Don't methods signatures have specifically-typed parameters? How can OOP techniques help you code in PHP if you always have to check the types of parameters received because the language doesn't enforce types? Please, if I'm wrong, explain it to me. When you design things using UML, then code classes in PHP with no return-typed methods and no-type parameters... Is the code really compliant with the UML design? You spend time designing the architecture of your software, then the compiler doesn't force the programmer to follow your design while coding, letting he/she assign any object variable to any other variable with no "type-mismatch" warning.

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  • Is it worth learning either GWT or Vaadin?

    - by NimChimpsky
    I consider myself a decent java/web developer. In my career I have always used servlets and ejb's with a web front end, most recently incoporating jquery and ajax. I can see the theoretical benefit of using GWT or Vaadin: it is my understanding they convert Java code to the required JavaScript/HTML. So the developer gets the benefit of cross browser compatibility and compile time error checking (of web GUI elements). My question is threefold: Are there any other benefits I am missing that would be gained using Vaadin or GWT? I am actually quite confident and productive using HTML and JavaScript - so will I actually see any benefit? Or will it just make my knowledge of these areas redundant (as they are handled by GWT/Vaadin)? Will the end result be that I can create enterprise scale data driven websites in a reasonably short time? I can however already do this, and I have not wasted any time learning GWT/Vaadin.

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  • What's the best approach to Facebook integration?

    - by Jay Stevens
    I have a new site/app going live next week (or somewhere close). I know there will be a relatively small (15,000?) very dedicated group of people on Facebook who will be very likely to be interested in the site, so I know I need Facebook integration of some kind. I won't be doing Facebook logins or pulling/posting to profiles yet, but I plan to... The question: Do I just do a Facebook "Page" for now? This is faster/easier to set up and seems a little less buggy.. and then migrate to a Facebook App later? or Do I create a "Facebook App" (with the api key/id/secret, etc.) now even if I'm doing nothing but using the "like" button. This means I don't have any migration later and I can use the javascript api to log "like" button clicks to Google Analytics, etc. Thoughts? Experiences? Is there a migration process to move your old Page users to your new "App"? What's the advantages / disadvantages of each.

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  • Bash arrays and case statements - review my script

    - by Felipe Alvarez
    #!/bin/bash # Change the environment in which you are currently working. # Actually, it calls the relevant 'lettus.sh' script if [ "${BASH_SOURCE[0]}" == "$0" ]; then echo "Try running this as \". chenv $1\"" exit 0 fi usage(){ echo "Usage: . ${PROG} -- Shows a list of user-selectable environments." echo " . ${PROG} [env] -- Select environment." echo " . ${PROG} -h -- Shows this usage screen." return } showEnv(){ # check if index0 exists, assume we have at least the first (zeroth) element #if [ -z "${envList}" ]; then if [ -z "${envList[0]}" ]; then echo "array \$envList is empty! " >&2 return 1 fi # Show all elements in array (0 -> n-1) for i in $(seq 0 $((${#envList[@]} - 1))); do echo ${envList[$i]} done return } setEnv(){ if [ -z "$1" ]; then usage; return fi case $1 in cold) FILE_TO_SOURCE=/u2/tip/conf/ctrl/lettus_cold.sh;; coles) FILE_TO_SOURCE=/u2/tip/conf/ctrl/lettus_coles.sh;; fc) FILE_TO_SOURCE=/u2/tip/conf/ctrl/lettus_fc.sh;; fcrm) FILE_TO_SOURCE=/u2/tip/conf/ctrl/lettus_fcrm.sh;; stable) FILE_TO_SOURCE=/u2/tip/conf/ctrl/lettus_stable.sh;; tip) FILE_TO_SOURCE=/u2/tip/conf/ctrl/lettus_tip.sh;; uat) FILE_TO_SOURCE=/u2/tip/conf/ctrl/lettus_uat.sh;; wellmdc) FILE_TO_SOURCE=/u2/tip/conf/ctrl/lettus_wellmdc.sh;; *) usage; return;; esac if $IS_SOURCED; then echo "Environment \"$1\" selected." echo "Now sourcing file \"$FILE_TO_SOURCE\"..." . ${FILE_TO_SOURCE} return else return 1 fi } main(){ if [ -z "$1" ]; then showEnv; return fi case $1 in -h) usage;; *) setEnv $1;; esac return } PROG="chenv" # create array of user-selectable environments envList=( cold coles fc fcrm stable tip uat wellmdc ) main "$@" return If I could, I'd like to get some feedback on a better way to accomplish any of the following: run through the case statement make script trivally simple to maintain/upgrade/update

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