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  • Teaching myself, as a physicist, to become a better programmer

    - by user787267
    I've always liked physics, and I've always liked coding, so when I got the offer for a PhD position doing numerical physics (details are not relevant, it's mostly parallel programming for a cluster) at a university, it was a no-brainer for me. However, as most physicists, I'm self taught. I don't have broad background knowledge about how to code in an object oriented way, or the name of that specific algorithm that optimizes the search in some kD tree. Since all my work so far has been more concerned about the physics and the scientific results, I undoubtedly have some bad habits - more so because my coding is my own, and not really teamwork. I have mostly used C since it is very straightforward and "what you write is what you get" - no need for fancy abstractions. However, I have recently switched to C++ since I'd like to learn more about the power that comes with abstraction, and it's pretty C-like (syntax-wise at least). How do I teach myself to code in a good, abstract way like a graduate in computer science? I know my code is efficient, but I want it to be elegant as well, and readable. Keep in mind that I don't have time to read several 1000-page tomes about abstract programming. I need to spend time on actual, physics related research (my supervisor would laugh at me if he knew I spent time thinking about how to program elegantly). How do I assess if my work is also good from a programmer's perspective?

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  • A better way to encourage contributions to OSS

    - by Daniel Cazzulino
    Currently in the .NET world, most OSS projects are available via a NuGet package. Users have a very easy path towards *using* the project right away. But let’s say they encounter some isssue (maybe a bug, maybe a potential improvement) with the library. At this point, going from user to contributor (of a fix, or a good bug repro or even a spike for a new feature) is a very steep and non trivial multi-step process of registering with some open source hosting site (codeplex, github, bitbucket, etc.), learning how to grab the latest sources, build the project, formulate a patch (or fork the code), learn the source control software they use (mercurial, git, svn, tfs), install whatever tools are needed for it, read about the contributors workflow for the project (do you fork &amp; send pull requests? do you just send a patch file? do you just send a snippet? a unit test? etc.), and on, and on, and on. Granted, you may be lucky and already know the source control system the project uses, but in really, I’d say the chances are pretty low. I believe most developers *using* OSS are far from familiar with them, much less with contributing back to various projects. We OSS devs like to be on the cutting edge all the time, ya’ know, always jumping on the new SCC system, the new hosting site, the new agile way of managing work items, bug tracking, code reviews, etc. etc. etc.. But most of our OSS users are largely the “... Read full article

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  • Declarative View Objects (VOs) for better ADF performance

    - by Shay Shmeltzer
    Just got back from ODTUG's kscope13 conference which had a lot of good deep ADF content. In one of my session I ran out of time to do one of my demos, so I wanted to share it here instead. This is a demo of how Declarative View Objects can increase your application's performance. For those who are not familiar with declarative VOs, those are VOs that don't actually specify a hard coded query. Instead ADF creates their query at runtime, and it does it based on the data that is requested in your UI layer. This can be a huge saver of both DB resources and network resources. More in the documentation. Here is a quick example that shows you how using such a VO can automatically switch to a simpler SQL instead of a complex join when needed. (note while I demo with 11.1.2.* the feature is there in 11.1.1.* versions also). The demo also shows you how you can monitor the SQL that ADF BC issues to the database using the WebLogic logging feature in JDeveloper. As a side note, I would have loved to see more ADF developers attending Kscope. This demo was part of the "ADF intro" track at Kscope, In the advanced ADF track you would have been treated to a full tuning session about ADF with lots of other tips. Consider attending Kscope next year - it is going to be in Seattle this time.

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  • How to better adjust more then 2 keyboard layouts

    - by zetah
    From time to time I have to use characters not present in my two layouts: Latin and Cyrillic and instead digging in Character map I thought to additionally add 2 more keyboard layouts. My issue with this approach is that most of the time I use just two layouts, and while changing to different layout (Alt-Shift) I now have to press couple of times to switch to previous layout. It's not just number of pressings, but I have to press two keys at once and track keyboard indicator which is distracting. I tried some options presented in keyboard settings, but I think there is no option that I would like - change just between first two layouts on Alt-Shift, and if I want to use additional layout I can choose it from keyboard indicator drop-down menu. Any ideas how this might be possible

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  • Replacing ASP.NET Forms Authentication with WIF Session Authentication (for the better)

    - by Your DisplayName here!
    ASP.NET Forms Authentication and WIF Session Authentication (which has *nothing* to do with ASP.NET sessions) are very similar. Both inspect incoming requests for a special cookie that contains identity information, if that cookie is present it gets validated and if that is successful, the identity information is made available to the application via HttpContext.User/Thread.CurrentPrincipal. The main difference between the two is the identity to cookie serialization engine that sits below. Whereas ForsmAuth can only store the name of the user and an additional UserData string. It is limited to a single cookie and hardcoded to protection via the machine key. WIF session authentication in turn has these additional features: Can serialize a complete ClaimsPrincipal (including claims) to the cookie(s). Has a cookie overflow mechanism when data gets too big. In total it can create up to 8 cookies (á 4 KB) per domain (not that I would recommend round tripping that much data). Supports server side caching (which is an extensible mechanism). Has an extensible mechanism for protection (DPAPI by default, RSA as an option for web farms, and machine key based protection is coming in .NET 4.5) So in other words – session authentication is the superior technology, and if done cleverly enough you can replace FormsAuth without any changes to your application code. The only features missing is the redirect mechanism to a login page and an easy to use API to set authentication cookies. But that’s easy to add ;) FormsSessionAuthenticationModule This module is a sub class of the standard WIF session module, adding the following features: Handling EndRequest to do the redirect on 401s to the login page configured for FormsAuth. Reads the FormsAuth cookie name, cookie domain, timeout and require SSL settings to configure the module accordingly. Implements sliding expiration if configured for FormsAuth. It also uses the same algorithm as FormsAuth to calculate when the cookie needs renewal. Implements caching of the principal on the server side (aka session mode) if configured in an AppSetting. Supports claims transformation via a ClaimsAuthenticationManager. As you can see, the whole module is designed to easily replace the FormsAuth mechanism. Simply set the authentication mode to None and register the module. In the spirit of the FormsAuthentication class, there is also now a SessionAuthentication class with the same methods and signatures (e.g. SetAuthCookie and SignOut). The rest of your application code should not be affected. In addition the session module looks for a HttpContext item called “NoRedirect”. If that exists, the redirect to the login page will *not* happen, instead the 401 is passed back to the client. Very useful if you are implementing services or web APIs where you want the actual status code to be preserved. A corresponding UnauthorizedResult is provided that gives you easy access to the context item. The download contains a sample app, the module and an inspector for session cookies and tokens. Let’s hope that in .NET 4.5 such a module comes out of the box. HTH

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  • Do you actively look for a better job?

    - by Ace
    ...Even though you're basically happy where you are? I've been thinking for a while that it might be a good idea to look around, but how do you go about doing it? Do you hide the fact from your employer? What do you tell the recruiters? Can you play your current employer out against the new recruiter or vice versa, and how do you do that? Any pitfalls? Edit: I've bolded the questions that people haven't really answered yet.

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  • Portable Class Library even better in .NET 4.5

    - by nmarun
    Visual Studio 2012 makes Cross-Platform development even easier. It comes with a feature called Portable Class Library (PCL). This feature was available in Visual Studio 2010 as well, but it required an additional install as against being out-of-the-box for 2012. It’s also worth noting that PCL is available only for Pro and above versions of 2012. So it’s not available with the Express edition of Visual Studio 2012. Let’s get started. In Visual Studio 2012 you can see a template called Portable Class...(read more)

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  • Better drivers for SiS 650/740 integrated video?

    - by Bart van Heukelom
    I installed Xubuntu 10.10 on an old box today and the graphical performance is horrid. According to lspci, the video card is this: 01:00.0 VGA compatible controller: Silicon Integrated Systems [SiS] 65x/M650/740 PCI/AGP VGA Display Adapter (prog-if 00 [VGA controller]) Subsystem: ASUSTeK Computer Inc. Device 8081 Flags: 66MHz, medium devsel, IRQ 11 BIST result: 00 Memory at f0000000 (32-bit, prefetchable) [size=128M] Memory at e7800000 (32-bit, non-prefetchable) [size=128K] I/O ports at d800 [size=128] Expansion ROM at <unassigned> [disabled] Capabilities: <access denied> Kernel modules: sisfb Is there a way to make it faster? Alternative drivers? The additional drivers tool shows nothing. I'm specifically interested in improving Java's Java2D rendering speed, because I'll be running a "stat screen" written in that language on it.

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  • Which is better jplayer or jwplayer?

    - by aoi
    I need to make a video slideshow( slides to contain embedded video players and must play mp4 files), and I am kind of confused what would be the best free solution I can use? jplayer and jwplayer both seem good, but I can't find any comparisons between them, so I want some expert opinions and user experiences on these two. Also if there are any other free and open source solutions you can recommend, i am all ears ;) My requirements are: The player must be html5 with fallback to flash. Should support mp4 files as well as flv. Should also have the ability to double as an audio player(mp3) along with video capabilities. Should be lightweight and customizable easily in terms of looks.

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  • Do the best developers look for a better job, or a better job finds them?

    - by Vasil Remeniuk
    As an example, one of the JavaPosse (popular Java podcast) hosts, Tor Norbey, has recently moved from Oracle to Google, and I'm more that sure that he has been lured (he definitely has not been sending his CV to Google). The rumor has it that 'high-level' developers are never hired through the job-sites. So, (given that you're a good developer) when you what to hold an appealing position in the company that interests you, and invest a lot of time into increasing your online-presence and self-branding blogging, twitting, contributing to opensource, actively participating in community sites (e.g., Stackoverflow), should you send your CVs here and there or just wait for proposals?

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  • Design Principles: An Illuminati For Better Solution

    From my earliest memory of programming, I was taught that we should do some level of design before coding. Somewhere around the way I started hearing phrases Dependency Injection, IoC etc., but whenever I asked people the need for these patterns, I seldom got an answer that satisfied me…

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  • Be a better programmer or an irreplacable employee?

    - by mahen23
    Before I worked for a web development company, I asked a lot of questions of friends who were working as developers for tips about being good at your job. One answer I got was: "Always make the employers beg for your competencies. Prove to them that you are the best and you cannot be replaced. While keeping the status quo, hold your employers hostage where if one day they remove your from the job or task, no one else will be able to do your job." How true is this statement?

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  • Better way to do AI Behavior in AS3/Flixel

    - by joon
    I'm making a game in Flixel and I need to program an NPC. It's rapidly turning more complex than I expected. I was wondering if there are any best practices, tutorials or examples that you can refer me to, to see how this is done. I can probably hack it together, which is what I always do, but it would be nice if I can make it maintanable and can add stuff later on. Here's screenshot to give you an idea: The butler will be an NPC that will follow you, or guide you, and talk to you the whole time. EDIT: More specifically: What I have now is a long list of IF statements in the update loop of the butler (about 8 different cases), and all I have covered is his walking behavior. I want him to comment on things and sometimes switch his main behavior to be more aggresive or distant,... Is there any way to keep track of this, or is complex code with many many nested if statements the way to go?

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  • Kronos Workforce Mobile Apps (w/Java ME tech) lets bosses and staff work better

    - by hinkmond
    The Kronos Workforce Mobile apps let bosses spy on their workers, and let workers do what workers do best (uh, you know, work?), all using Java ME technology. See: Enable your Mobile Workforce w/Kronos Here's a quote: Kronos® Workforce Mobile™ Manager – allows managers to use their devices to monitor workforce operations, resolve exceptions, and respond quickly to employee requests. Kronos Workforce Mobile Employee – enables employees to track their work in real time, quickly and easily review information such as their schedules and timecards, and request time off. Kronos mobile applications are delivered as native applications for [blah-blah-blah]. A JavaME option is also available, which runs on a wide range of feature phones. Good stuff for the enterprise. Java ME technology helps run the mobile enterprise. I like that. Kinda catchy... Hinkmond

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