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  • Why does TDD work?

    - by CesarGon
    Test-driven development (TDD) is big these days. I often see it recommended as a solution for a wide range of problems here in Programmers SE and other venues. I wonder why it works. From an engineering point of view, it puzzles me for two reasons: The "write test + refactor till pass" approach looks incredibly anti-engineering. If civil engineers used that approach for bridge construction, or car designers for their cars, for example, they would be reshaping their bridges or cars at very high cost, and the result would be a patched-up mess with no well thought-out architecture. The "refactor till pass" guideline is often taken as a mandate to forget architectural design and do whatever is necessary to comply with the test; in other words, the test, rather than the user, sets the requirement. In this situation, how can we guarantee good "ilities" in the outcomes, i.e. a final result that is not only correct but also extensible, robust, easy to use, reliable, safe, secure, etc.? This is what architecture usually does. Testing cannot guarantee that a system works; it can only show that it doesn't. In other words, testing may show you that a system contains defects if it fails a test, but a system that passes all tests is not safer than a system that fails them. Test coverage, test quality and other factors are crucial here. The false safe feelings that an "all green" outcomes produces to many people has been reported in civil and aerospace industries as extremely dangerous, because it may be interepreted as "the system is fine", when it really means "the system is as good as our testing strategy". Often, the testing strategy is not checked. Or, who tests the tests? I would like to see answers containing reasons why TDD in software engineering is a good practice, and why the issues that I have explained above are not relevant (or not relevant enough) in the case of software. Thank you.

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  • BPM11g Launch - Spotlight on Innovation: A Unified Business Process Management Solution June 17th 2

    - by Jürgen Kress
    Spotlight on Innovation: A Unified Business Process Management Solution Thursday, June 17th, 2010 10 a.m. PT / 18:00 UK / 19:00 CET Presented by: Hasan Rizvi Senior Vice President Oracle Product Management Business Process Management (BPM) is essential for managing change and increasing business visibility, agility, and efficiency. To make the most of BPM, businesses today need to benefit from a new generation of process management solutions. Join Hasan Rizvi, Senior Vice President, Oracle Product Development, as he discusses Oracle’s innovations in the new BPM Suite 11g which will define the next generation of process management. Discover how you can leverage this complete, open, and integrated BPM solution that delivers: Management of all types of processes; including system, human, document, and decision-centric A simplified path to achieving greater business visibility, agility, and efficiency A unified process foundation that simplifies process management with a unified process engine and preintegration of process subsystems User-centric design that simplifies process modeling and interaction Social BPM interaction that provides social computing in the context of BPM to simplify and add richness to collaboration Register today for this live Webcast, another edition in a series introducing the next wave of products in Oracle Fusion Middleware 11g. Did you missed our BPM 11g webcast with Clemens Utschig-Utschig? The recorded version is now available! Here is your feedback: First experience with BPMN 2.0 in Oracle BPM Studio 11g by Hajo Normann Warum Oracle BPM Studio 11g? by Torsten Winterberg Oracle BPM 11g, less is more by Léon Smiers Oracle BPM 11g Integration with ADF and WebCenter Suite by Andrejus Baranovskis Oracle BPM11g available! by Guido Schmutz Listen to more feedback here. If you are working on BPM 11g projects and you would like to attend a hands-on training session, please contact Jürgen Kress. Technorati Tags: BPM,BPMN2.0,SOA,Hasan Rizvi,SOA Partner Community

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  • Who writes the words? A rant with graphs.

    - by Roger Hart
    If you read my rant, you'll know that I'm getting a bit of a bee in my bonnet about user interface text. But rather than just yelling about the way the world should be (short version: no UI text would suck), it seemed prudent to actually gather some data. Rachel Potts has made an excellent first foray, by conducting a series of interviews across organizations about how they write user interface text. You can read Rachel's write up here. She presents the facts as she found them, and doesn't editorialise. The result is insightful, but impartial isn't really my style. So here's a rant with graphs. My method, and how it sucked I sent out a short survey. Survey design is one of my hobby-horses, and since some smartarse in the comments will mention it if I don't, I'll step up and confess: I did not design this one well. It was potentially ambiguous, implicitly excluded people, and since I only really advertised it on Twitter and a couple of mailing lists the sample will be chock full of biases. Regardless, these were the questions: What do you do? Select the option that best describes your role What kind of software does your organization make? (optional) In your organization, who writes the text on your software user interfaces? (for example: button names, static text, tooltips, and so on) Tick all that apply. In your organization who is responsible for user interface text? Who "owns" it? The most glaring issue (apart from question 3 being a bit broken) was that I didn't make it clear that I was asking about applications. Desktop, mobile, or web, I wouldn't have minded. In fact, it might have been interesting to categorize and compare. But a few respondents commented on the seeming lack of relevance, since they didn't really make software. There were some other issues too. It wasn't the best survey. So, you know, pinch of salt time with what follows. Despite this, there were 100 or so respondents. This post covers the overview, and you can look at the raw data in this spreadsheet What did people do? Boring graph number one: I wasn't expecting that. Given I pimped the survey on twitter and a couple of Tech Comms discussion lists, I was more banking on and even Content Strategy/Tech Comms split. What the "Others" specified: Three people chipped in with Technical Writer. Author, apparently, doesn't cut it. There's a "nobody reads the instructions" joke in there somewhere, I'm sure. There were a couple of hybrid roles, including Tech Comms and Testing, which sounds gruelling and thankless. There was also, an Intranet Manager, a Creative Director, a Consultant, a CTO, an Information Architect, and a Translator. That's a pretty healthy slice through the industry. Who wrote UI text? Boring graph number two: Annoyingly, I made this a "tick all that apply" question, so I can't make crude and inflammatory generalizations about percentages. This is more about who gets involved in user interface wording. So don't panic about the number of developers writing UI text. First off, it just means they're involved. Second, they might be good at it. What? It could happen. Ours are involved - they write a placeholder and flag it to me for changes. Sometimes I don't make any. It's also not surprising that there's so much UX in the mix. Some of that will be people taking care, and crafting an understandable interface. Some of it will be whatever text goes on the wireframe making it into production. I'm going to assume that's what happened at eBay, when their iPhone app purportedly shipped with the placeholder text "Some crappy content goes here". Ahem. Listing all 17 "other" responses would make this post lengthy indeed, but you can read them in the raw data spreadsheet. The award for the approach that sounds the most like a good idea yet carries the highest risk of ending badly goes to whoever offered up "External agencies using focus groups". If you're reading this, and that actually works, leave a comment. I'm fascinated. Who owned UI text Stop. Bar chart time: Wow. Let's cut to the chase, and by "chase", I mean those inflammatory generalizations I was talking about: In around 60% of cases the person responsible for user interface text probably lacks the relevant expertise. Even in the categories I count as being likely to have relevant skills (Marketing Copywriters, Content Strategists, Technical Authors, and User Experience Designers) there's a case for each role being unsuited, as you'll see in Rachel's blog post So it's not as simple as my headline. Does that mean that you personally, Mr Developer reading this, write bad button names? Of course not. I know nothing about you. It rather implies that as a category, the majority of people looking after UI text have neither communication nor user experience as their primary skill set, and as such will probably only be good at this by happy accident. I don't have a way of measuring those frequency of those accidents. What the Others specified: I don't know who owns it. I assume the project manager is responsible. "copywriters" when they wish to annoy me. the client's web maintenance person, often PR or MarComm That last one chills me to the bone. Still, at least nobody said "the work experience kid". You can see the rest in the spreadsheet. My overwhelming impression here is of user interface text as an unloved afterthought. There were fewer "nobody" responses than I expected, and a much broader split. But the relative predominance of developers owning and writing UI text suggests to me that organizations don't see it as something worth dedicating attention to. If true, that's bothersome. Because the words on the screen, particularly the names of things, are fundamental to the ability to understand an use software. It's also fascinating that Technical Authors and Content Strategists are neck and neck. For such a nascent discipline, Content Strategy appears to have made a mark on software development. Or my sample is skewed. But it feels like a bit of validation for my rant: Content Strategy is eating Tech Comms' lunch. That's not a bad thing. Well, not if the UI text is getting done well. And that's the caveat to this whole post. I couldn't care less who writes UI text, provided they consider the user and don't suck at it. I care that it may be falling by default to people poorly disposed to doing it right. And I care about that because so much user interface text sucks. The most interesting question Was one I forgot to ask. It's this: Does your organization have technical authors/writers? Like a lot of survey data, that doesn't tell you much on its own. But once we get a bit dimensional, it become more interesting. So taken with the other questions, this would have let me find out what I really want to know: What proportion of organizations have Tech Comms professionals but don't use them for UI text? Who writes UI text in their place? Why this happens? It's possible (feasible is another matter) that hundreds of companies have tech authors who don't work on user interfaces because they've empirically discovered that someone else, say the Marketing Copywriter, is better at it. And once we've all finished laughing, I'll point out that I've met plenty of tech authors who just aren't used to thinking about users at the point of need in the way UI text and embedded user assistance require. If you've got what I regard, perhaps unfairly, as the bad kind of tech author - the old-school kind with the thousand-page pdf and the grammar obsession - if you've got one of those then you probably are better off getting the UX folk or the copywriters to do your UI text. At the very least, they'll derive terminology from user research.

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  • How do I find a qualified web designer in my area?

    - by Incognito
    I just sent out emails to five local web design companies to my area asking to take drawings to HTML/CSS/jQuery. None of the ones who accepted the deal seem suitable to myself. Others rejected the offer because they wanted to 'provide an end-to-end solution' or are 'booked till June'. The local companies did not seem suitable to myself because my review process is this: goto their website, do a view-source. I'll see really weird things (contact us forms that go nowhere), really old things (mm_menu.js), and portfolios that are non-existent (aren't on the site, don't link anywhere, or otherwise). The company would like to hire as locally as they can rather than out-source to another country. Answers I'm looking for Processes you use when searching for someone How you qualify their aptitude for the project Anything that you think I'm doing wrong, or should be doing also. Answers I'm not looking for: "Hello sir please contact me we do everything for 10 dolla." My bud's great at this stuff, call him. example.com is the best for this.

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  • Is comparing an OO compiler to a SQL compiler/optimizer valid?

    - by Brad
    I'm now doing a lot of SQL development at my new job where as before I was doing Object Oriented desktop app stuff. I keep running across very large scripts (thousands of lines) and wanting to refactor in some way. I am seeing that SQL is a different sort of beast and it's probably fine to have these big scripts for the most part but while explaining this to me people are also insisting that the whole idea of refactoring is bad. That stuff like the .NET compiler are actually burdened by refactored code and that a big wall of code is more efficient and better design than code designed for reuse, readability and scalability. The other argument is that OO compilers are almost dangerously inefficient and don't have efficient memory management or runs too many CPU instructions compared to older "simpler" compilers and compared to SQL. Are these valid complaints? Even if some compiler like a C compiler is modestly more "efficient" (whatever that means on this high of a level without seeing code) would you want to write applications in C over C# or Java? Is comparing an OO compiler to a SQL compiler/optimizer even valid?

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  • Laptop drains of quickly with battery

    - by Shyam
    I am a user since years in ubuntu and I have not come across this problem with ubuntu till date. My battery drains off immediately after I unplug my AC power. The options I tried: 1) checked the battery state with : cat /proc/acpi/battery/BAT0/state present: yes capacity state: ok charging state: charged present rate: 0 mA remaining capacity: 392 mAh present voltage: 12476 mV Initially it was showing charging state: charging after 5mins it started displaying as charged. ! Based on that if I remove my AC Power it shows low battery notification. 2) When I run acpi : acpi -b Battery 0: Unknown, 9% The battery state shows as unknown. But initially when we plug-in to AC adapter acpi -b Battery 0: Charging, 9%, 13:04:00 until charged 3) When the check the same with : upower -i /org/freedesktop/UPower/devices/battery_BAT0 native-path: /sys/devices/LNXSYSTM:00/device:00/PNP0A08:00/device:02/PNP0C09:00/PNP0C0A:00/power_supply/BAT0 vendor: HP power supply: yes updated: Thu Nov 1 16:06:40 2012 (20 seconds ago) has history: yes has statistics: yes battery present: yes rechargeable: yes state: charging energy: 4.2336 Wh energy-empty: 0 Wh energy-full: 33.1128 Wh energy-full-design: 33.1128 Wh energy-rate: 5.6052 W voltage: 12.474 V time to full: 5.2 hours percentage: 12.7854% capacity: 100% technology: lithium-ion Is the power stats output, It says 5hrs to charge completely, If I charge it even more than 5hrs and unplug the AC power, It again cribs stating LOW BATTERY !! The same thing does not happen with Windows7. Any suggestions/ help will be greatly appreciated.

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  • Check Out Eye Tracking, Mobile, and Fusion Apps at Apps UX Demo Pods

    - by Oracle OpenWorld Blog Team
    By Kathy Miedema, Oracle Applications User Experience Among the many cool things to see at the Oracle OpenWorld DEMOgrounds this year will be demo pods featuring some of the cutting-edge tools in Oracle’s arsenal of usability evaluation methods.OK, so we’re bragging a little. But past conference goers agree – these demos consistently hit the Top 10 for number of visits. Why? Because you get to try out our eye-tracking tool, which follows where a user looks on a screen and helps the UX team decipher issues with navigation design. Or you can see our facial gesture analysis tool in action, which helps us read the emotions you might be experiencing as you look at a screen – happy, sad, or dismayed, to name a few. Are you interested in Oracle’s strategy for user experience? Come to the Apps UX pods for a look at enterprise applications on mobile devices including smart phones and the iPad. Stay for a demo of self-service or CRM tasks in the Fusion Applications welcome experience. The DEMOgrounds for Oracle Applications are located on the lower level of Moscone West. Hours for the Exhibition Hall are Monday, October 1: 9:30 a.m. to 6:00 p.m. Tuesday, October 2: 9:45 a.m. to 6:00 p.m. Wednesday, October 3: 9:45 a.m. to 4:00 p.m.  Not yet registered for Oracle OpenWorld? Register now!

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  • CSS help positioning divs inline

    - by JaPerk14
    I need help with a recurring problem that happens a lot. I want to create a header that consists of 3 sections which are positioned inline. I display them inline using the following css code: display: inline & float: leftThe problem is that when I resize my browser window the last div is pushed down and isn't displayed inline. I know it sounds like I'm being picky, but I don't want the design to distort as the visitor change's the monitor screen. I have provided the html and css code below that I am working with below. Hopefully I have explained this well enough. Thanks in advance. HTML <div class="masthead-wrapper"> &nbsp; </div> <div class="searchbar-wrapper"> &nbsp; </div> <div class="profile-menu-wrapper"> &nbsp; </div> CSS #Header { display: block; width: 100%; height: 80px; background: #C0C0C0; } .masthead-wrapper { display: inline; float: left; width: 200px; height: 80px; background: #3b5998; } .searchbar-wrapper { display: inline; float: left; width: 560px; height: 80px; background: #FF0000; } .profile-menu-wrapper { display: inline; float: left; width: 200px; height: 80px; background: #00FF00; }

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  • Is there an established or defined best practice for source control branching between development and production builds?

    - by Matthew Patrick Cashatt
    Thanks for looking. I struggled in how to phrase my question, so let me give an example in hopes of making more clear what I am after: I currently work on a dev team responsible for maintaining and adding features to a web application. We have a development server and we use source control (TFS). Each day everyone checks in their code and when the code (running on the dev server) passes our QA/QC program, it goes to production. Recently, however, we had a bug in production which required an immediate production fix. The problem was that several of us developers had code checked in that was not ready for production so we had to either quickly complete and QA the code, or roll back everything, undo pending changes, etc. In other words, it was a mess. This made me wonder: Is there an established design pattern that prevents this type of scenario. It seems like there must be some "textbook" answer to this, but I am unsure what that would be. Perhaps a development branch of the code and a "release-ready" or production branch of the code?

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  • Why do some programmers think there is a contrast between theory and practice?

    - by Giorgio
    Comparing software engineering with civil engineering, I was surprised to observe a different way of thinking: any civil engineer knows that if you want to build a small hut in the garden you can just get the materials and go build it whereas if you want to build a 10-storey house you need to do quite some maths to be sure that it won't fall apart. In contrast, speaking with some programmers or reading blogs or forums I often find a wide-spread opinion that can be formulated more or less as follows: theory and formal methods are for mathematicians / scientists while programming is more about getting things done. What is normally implied here is that programming is something very practical and that even though formal methods, mathematics, algorithm theory, clean / coherent programming languages, etc, may be interesting topics, they are often not needed if all one wants is to get things done. According to my experience, I would say that while you do not need much theory to put together a 100-line script (the hut), in order to develop a complex application (the 10-storey building) you need a structured design, well-defined methods, a good programming language, good text books where you can look up algorithms, etc. So IMO (the right amount of) theory is one of the tools for getting things done. So my question is why do some programmers think that there is a contrast between theory (formal methods) and practice (getting things done)? Is software engineering (building software) perceived by many as easy compared to, say, civil engineering (building houses)? Or are these two disciplines really different (apart from mission-critical software, software failure is much more acceptable than building failure)?

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  • In a Tower defense game, how to do buffs/debuffs

    - by Gabe
    The question is at the very bottom. If you understand Buffs/Debuffs in tower defense games then you should skip the bulk of this question and go to the bottom (seperated with the long line) I plan on making an IPhone TD game. The fact that its an iPhone game isn't relevant but I am coding in Objective-c with Cocos2D. I am relatively inexperienced in the field of game design so I'm looking for some advice from someone experienced in this field. In tower defense, there are two things that are relevant to my question: towers/enemies (both have their own classes/children). They each have stats like hp, damage, speed, etc. I want to add buffs/defuffs, for instance: Towers A,B and C each have 15 base damage. Tower D would be a buff tower with no damage, a tower with an AOE(area of effect) aura that gives 10% damage to all towers in range. Tower E might slow enemies in its AOE, a debuff. Stuff like that. The same could go for enemies. Enemy A is a boss that has a slow aura that affects towers and slows their base attack speed or something along those lines. So the question is, what would be the most effective way to implement this? If it was just towers then I would just mess around with the tower classes, but since tower classes and enemy classes are both affected, should I make a buff class? TD games can consume quite a bit of memory with large amounts of creeps and towers, and buffs I feel like would also consume quit a bit... So I'm trying to be as effective as possible.

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  • Oracle Systems and Solutions at CloudExpo NY 2012

    - by ferhat
    Oracle's Larry Ellison and Mark Hurd just unveiled industy's broadest cloud strategy on June 6, with services based on industry standards, with 100+ enterprise applications live in the Cloud today!  The broadest strategy to support your journey along the cloud in any path chose, at any pace your business require and need. This is great assurance for your journey into the clouds as it is, at the same time, quite a temptation, don't you think? We will be at the Cloud Expo Conference to take place June 11-14 in New York. Oracle is Platinum Plus sponsor of 10th International  Cloud Computing Conference & Expo 2012 East. Oracle is also glad to offer complimentary VIP Gold Passes to the conference. We wish everyone a great and productive time with all  the fellow cloudsters.  We, the systems solutions group at Oracle, have prepared Oracle Optimized Solution for Enterprise Cloud Infrastructure to help you start your Infrastructure-as-a-Service with ease, confidence, speed, and savings.  In this solution we are now bringing together the power of Oracle Solaris and SPARC T4 servers. We will be at the Cloud Bootcamp on Wednesday June 13th discussing how this combination can maximize return on investment and help organizations manage costs for their existing infrastructures or for new enterprise cloud infrastructure design. We will also be at the Expo floor #511 throughout the Cloud Expo conference. Join us for the keynote, general session, and technical sessions with Oracle: Keynote Session: A Pragmatic Journey to the Cloud , Tuesday, June 12, 2012 General Session: Oracle Cloud - An Enterprise Cloud for Business-Critical Applications , Monday, June 11, 2012 Conference Session: Accelerate Enterprise Cloud Deployment and Gain Total Cloud Control, Monday, June 11, 2012 Conference Session: The Java EE 7 Platform: Developing for the Cloud, Monday, June 11, 2012 Conference Session: Integrating Big Data into Your Data Center: A Big Data Reference Architecture, Monday, June 11, 2012 Conference Session: Borderless Applications in the Cloud with Oracle VM and Oracle Virtual Assembly Builder, Tuesday, June 12, 2012 Conference Session: Building a Private, Public, or Hybrid Cloud? Simplify Your Cloud with Oracle’s Complete Cloud Solution,Tuesday, June 12, 2012 Cloud Boot Camp: Building Private IaaS with Oracle Solaris and SPARC, Wednesday, June 13, 2012

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  • Inconsistent movement / line-of-sight around obstacles on a hexagonal grid

    - by Darq
    In a roguelike game I've been working on, one of my core design goals has been to allow the player to "Play the game, not the grid." In essence, I want the player's positioning to be tactical because of elements in the game world, not simply because some grid tiles are more advantageous than others, in relation to enemies. I am fine with world geometry not being realistic, but it needs to be consistent. In this process I have ran into most of the common problems (Square tiles? Diagonal movement, LOS, corner cases, etc.) and have moved to a hexagonal tile grid. For the most part this has been great, and I've not had too many inconsistencies. Recently however I have been stumped by the following: Points A and B are both distance 4 from the player (red lines). Line-of-sight to both are blocked by walls (black tiles). However, due to the hexagonal grid, A can be reached in 4 moves, whereas B requires 5 moves (blue lines). On a hex grid, "shortest path" seems divorced from "direct path", there may be multiple shortest paths to any point, but there is only one direct path (or two in some situations). This is fine, geometry need not be realistic. However this also seems inconsistent, similar obstacles are more effective in some positions than in others. A player running away from an enemy should be able to run in any direction, increasing the distance between the two actors. However when placing obstacles or traps between themselves and enemies, the player is best served by running in one of the six directions that don't have multiple shortest paths. Is there a way to rationalise this? Am I missing something that makes this behaviour consistent? Or is there a way to make this behaviour consistent? I am most certainly over-thinking this, but as it is one of my goals, I should do it due diligence.

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  • I Admit I Misspoke

    - by Patrick Liekhus
    OK.  I admit it.  The last post I hade mentioned that we moved the XAF DSL to the Entity Framework.  This has caused a lot of confusion.  I meant to say that we have used the ADO.NET Entity Data Model extensions.  This is the design surface that can be tailored to create Entity Framework. We leveraged the code generation within the ADO.NET Entity Data Model (EDMX) file to generate XAF/XPO classes.  This allows you to visually create the entity model, set a few XAF properties and then generate the business objects from there.  I am presenting all these topics at the Kansas City Developers Conference on June 19th.  I will post the presentation after the conference.  I have a full presentation that will demonstrate the power of the ADO.NET Entity Data Model extensions, create a small project and then add the OData layer to XAF to connect to the PowerPivot in Excel 2010. The latest code can be found at http://efxaf.codeplex.com. More details to come soon.  Sorry for the confusion in the last post. Thanks again.

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  • Advice for programming a lobby for a network multiplayer game?

    - by Milo
    I'm working on learning network programming. I'm working on a simple card game. The basic idea is: Players enter the lobby Players see tables Players sit at an empty seat Once they sit, they do not need any information from the lobby, they see the card table and the data about the other players and so forth. I've programmed the server portion for the game itself. The clients connect to my server object and the server then receives and sends messages; quite simple. The tricky concepts for me are: What's a good way to run many tables at the same time? What's a good way to keep the lobby consistently updated for each person in the lobby (eg: MSG_TABLE_FILLED, 22) Ideally I'd like to have 1 server exe for all of this and to have to deal with multithreading as little as possible. I'm going to use the enet library. I was thinking that each time a game session starts, I push a new Game and I map the client IPs to that table, then I just route messages from those clients to that Game. Since enet supports channels I was thinking of using 2 channels per table, one for the game messages and one for in game chat. Would something like this work? Does anyone have any advice / design ideas for a game with a lobby and many tables? Is there a usual way this is done that I'm overlooking? Any conceptual ideas or even c/c++ code examples would be very helpful. Thanks

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  • Recent resources on Entity Framework 4

    - by Eric Nelson
    I just posted on the bits you need to install to explore all the features of Entity Framework 4 with the Visual Studio 2010 RC. I’ve also had a quick look (March 12th 2010) to see what new resources are out there on EF4. They appear a little thin on the ground – but there are some gems. The following all caught my attention: Julie Lerman has published 2 How-to-videos on EF4 on pluralsight.com. You need to create a free guest pass to watch them. Getting Started with Entity Framework 4.0 – Session given at Cairo CodeCamp 2010 . This includes ppt and demos. Entity Framework 4 providers – read through the comments What’s new with Entity Framework in Visual Studio 2010 RC Extending the design surface of EF4 using the Extension Starter Kit Persistence Ignorance and EF4 on geekSpeak on channel 9 (poor audio IMHO – I gave up) First of a series of posts on EF4 How to stop your dba having a heart attack with EF4 from Simon Sabin in the UK. This includes ppt and demos. And the biggy. You no longer have to depend on SQL Profiler to keep an eye on the generated SQL. There is now a commercial profiler for Entity Framework.  I am yet to try it – but I listened to a .NET rocks podcast which made it sound great. It is “hidden” in a session on DSLs in Boo –> Oren Eini on creating DSLs in Boo. This is a much richer experience than you would get from SQL Profiler – matching the SQL to the .NET code. And finally a momentous #fail to … drum roll… the Visual Studio 2010 and .NET Framework 4 Training Kit Feb release. This just contains one ppt on EF4 – and it is not even a good one. Real shame. P.S. I will update the 101 EF4 Resources with the above … but post devweek in case I find some more goodies. Related Links 101 EF4 Resources

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  • Warnings When Undo Isn't Possible

    - by ultan o'broin
    Enjoyed this post Never Use a Warning When you Mean Undo by Aza Raskin. It makes sense never to warn users if an undo option is possible. The examples given are from the web space. Here's the conclusion: Warnings cause us to lose our work, to mistrust our computers, and to blame ourselves. A simple but foolproof design methodology solves the problem: "Never use a warning when you mean undo." And when a user is deleting their work, you always mean undo. However, in enterprise apps you may find that an undo option isn't technically possible or desirable. Objects may be shared, part of a flow elsewhere, or undoing something committed to the database (a rollback I guess) may not be feasible if it becomes locked by another process. Plus, what constitutes user ownership of objects isn't always clear to users. The implications of delete (and other) actions need to be clearly communicated out in advance. Really, warnings are important in the enterprise space. Data has a very high value, and users can perform a wide variety of actions that may risk that data, not always within the application itself (at browser level, for example). That said, throwing warnings all over the place when an undo option is possible is annoying. Instead, treat warnings with respect. When there is no undo option possible, use warning messages to communicate potentially dangerous or irrecoverable actions or the downstream consequences of user actions on the process or task flow. Force the user to respond to a warning message by using a modal dialog with clearly labeled action buttons. Here's a couple of examples. A great article that got me thinking. Let's see more like that. Let's not forget there's more types of messages than just error messages. User assistance and user experience professionals need to understand when best to use confirmation, information, and warning types too!

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  • Cocos2d sprite's parent not reflecting true scale value

    - by Paul Renton
    I am encountering issues with determining a CCSprite's parent node's scale value. In my game I have a class that extends CCLayer and scales itself based on game triggers. Certain child sprites of this CCLayer have mathematical calculations that become inaccurate once I scale the parent CCLayer. For instance, I have a tank sprite that needs to determine its firing point within the parent node. Whenever I scale the layer and ask the layer for its scale values, they are accurate. However, when I poll the sprites contained within the layer for their parent's scale values, they always appear as one. // From within the sprite CCLOG(@"ChildSprite-> Parent's scale values are scaleX: %f, scaleY: %f", self.parent.scaleX, self.parent.scaleY); // Outputs 1.0,1.0 // From within the layer CCLOG(@"Layer-> ScaleX : %f, ScaleY: %f , SCALE: %f", self.scaleX, self.scaleY, self.scale); // Output is 0.80,0.80 Could anyone explain to me why this is the case? I don't understand why these values are different. Maybe I don't understand the inner design of Cocos2d fully. Any help is appreciated.

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  • Final Release of Silverlight Tools for Visual Studio 2010 Released

    - by dwahlin
    If you haven’t already heard the news, the final release of the Silverlight Tools for Visual Studio 2010 have been released! That’s great news for Silverlight developers and to top it off the crew up at Microsoft even snuck in a few new features including intellisense for styles (a big deal in my opinion) and the ability to easily manipulate Grid rows and columns.  One of the most time consuming (and boring) tasks experienced by developers is also covered with the new “Go To Value Definition” feature that allows you to jump directly to style definitions with ease.  That feature alone is worth the upgrade especially if you’re working with a large application that uses a lot of styles. Here’s a quick run-down of the features provided by the latest release from the Microsoft team: Support for targeting Silverlight 4 in the Silverlight designer and project system RIA Services application templates and libraries to simplify access to your data services (check out this Silverlight.tv video and whitepaper giving full details) Support for Silverlight 4 elevated trust and out-of-browser applications Enhanced support for other new Silverlight 4 features, including: Working with Implicit Styles Go To Value Definition - navigate directly from controls on your page to styles that are applied to them. Style Intellisense - easily modify styles you already have in XAML Working with Data Source Window outputs Data Source Selector - easily select and modify your data source information Grid Row and Column context menu - Add, remove, and re-sort DSW outputs and other Grid layouts Thickness Editor for editing Margins, Padding etc. Sample Data Support -  see your item templates and bindings light up at design time Working with Silverlight 4 Out-of-Browser applications Automatically launch and debug your OOB app from inside the IDE Specify XAP signing for trusted OOB apps Set the OOB window characteristics If you’d like to see some of the new features in action check out this Channel 9 video with Mark Wilson-Thomas and John Papa.

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  • Need database selection advise

    - by jacknad
    I know this is considered a bad question since there is no correct answer, but I need to decide on a database for embedded linux (DaVinci 368 based) hardware and I've never had to produce a design with a database before. Each record will probably contain less than 1000 images with associated alpha-numeric data and the mass storage will be some kind of flash drive. Only one user needs access to the data at a time. MySQL claims to be "The world's most popular open source database" but SQLite claims to be "the most widely deployed SQL database engine in the world." Perhaps there is another that is also the best in the world? Which is easiest to use for a database newbie? Should I just flip a coin? Does it really matter which one I pick? Do I even need to use a database software package or should I roll my own? I won't need bells and whistles like sorting, but I'll probably need to delete the oldest records to make room for new ones if the storage fills up.

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  • Java ME SDK 3.0.5 is released!

    - by SungmoonCho
      Java ME SDK 3.0.5 went live! For many months, we have been working hard to fix bugs from previous version, and add a lot of new features demanded by Java ME community. You can download the new version from this link. Please see below for more information. NetBeans Integration All Java ME tools are implemented as NetBeans plugins. Device Manager Java ME SDK now supports multiple device managers. You can switch between different versions of device managers. LWUIT 1.5 Support The Resource Editor is available from the Java ME menu to help you design and organize resources for LWUIT applications. For a description of LWUIT 1.5 features, visit the LWUIT download page Network Monitor Integrated with NetBeans profiling tools, the Network Monitor now supports WMA, SIP, Bluetooth and OBEX, SATSA APDU and JCRMI, and server sockets. CPU Profiler Now uses standard NetBeans profiling facilities to view snapshots. Profiling of VM classes can also be toggled on or off. WURFL Device Database The database has been updated with more than 1000 new devices. Tracing - New tracing functionality now includes CLDC VM events, and monitors events such as exceptions, class loading, garbage collection, and methods invocation. New or updated JSR support - Includes support for JSR 234 (Advanced Multimedia Supplements), JSR 253 (Mobile Telephony API), JSR 257 (Contactless Communication API), JSR 258 (Mobile User Interface Customization API), and JSR 293 (XML API for Java ME).

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  • How to explain pointers to a Java/VB programmer

    - by Skeith
    I am writing a game and my friend has offered to help me as it is a RPG and will take a long time to do the "scripting" bit of the game. The problem is IMO he's not that good a programmer :( (add flame war here). He has only programmed in Java and VB and keeps saying really stupid things to me like "Why don't you drag and drop an onClick event" to design my UI when I'm using DirectX. I tried explaining pointers to him but his response was, if it's just a variable that holds a memory address, why don't you just use an int? I create an instance of an attack class and give the creature a pointer to it so if several creatures use the same attack there is only one instance of it. He keeps saying why not put if statements in the creature class for every attack class and set true for the ones that are there. He has programmed mainly in VB and a little in Java just to learn OOP. How can I explain advanced C++ concepts like pointers and memory management to him? He just doesn't understand there are no super functions like form.show in C++.

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  • With which class to start Test Driven Development of card game application? And what would be the next 5 to 7 tests?

    - by Maxis
    I have started to write card game applications. Some model classes: CardSuit, CardValue, Card Deck, IDeckCreator, RegularDeckCreator, DoubleDeckCreator Board Hand and some game classes: Turn, TurnHandler IPlayer, ComputerPlayer, HumanPlayer IAttackStrategy, SimpleAttachStrategy, IDefenceStrategy, SimpleDefenceStrategy GameData, Game are already written. My idea is to create engine, where two computer players could play game and then later I could add UI part. Already for some time I'm reading about Test Driven Development (TDD) and I have idea to start writing application from scratch, as currently I have tendency to write not needed code, which seems usable in future. Also code doesn't have any tests and it is hard to add them now. Seems that TDD could improve all these issue - minimum of needed code, good test coverage and also could help to come to right application design. But I have one issue - I can't decide from where to start TDD? Should I start from bottom - Card related classes or somewhere on top - Game, TurnHandler, ... ? With which class you would start? And what would be the next 5 to 7 tests? (use the card game you know the best) I would like to start TDD with your help and then continue on my own!

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  • How to Use and Customize Google Chrome Web Apps

    - by The Geek
    Google announced their new Chrome Web Store today, with loads of web sites and games that can be installed as applications in your browser, synced across every PC, and customized to launch the way you want them to. Here’s how it all works. Note: this guide really isn’t aimed at expert geeks, though you’re more than welcome to leave your thoughts in the comments. What Are Chrome Web Apps Again? The new Chrome Web Apps are really nothing more than regular web sites, optimized for Chrome and then wrapped up with a pretty icon and installed in your browser. Some of these sites, especially web-based games, can also be purchased through the Chrome Web Store for a small fee, though the majority of services are free Latest Features How-To Geek ETC The How-To Geek Holiday Gift Guide (Geeky Stuff We Like) LCD? LED? Plasma? The How-To Geek Guide to HDTV Technology The How-To Geek Guide to Learning Photoshop, Part 8: Filters Improve Digital Photography by Calibrating Your Monitor Our Favorite Tech: What We’re Thankful For at How-To Geek The How-To Geek Guide to Learning Photoshop, Part 7: Design and Typography Fun and Colorful Firefox Theme for Windows 7 Happy Snow Bears Theme for Chrome and Iron [Holiday] Download Full Command and Conquer: Tiberian Sun Game for Free Scorched Cometary Planet Wallpaper Quick Fix: Add the RSS Button Back to the Firefox Awesome Bar Dropbox Desktop Client 1.0.0 RC for Windows, Linux, and Mac Released

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  • The Oracle VM Hall of Fame

    - by Kristin Rose
    “Take me out to the ball game, take me out to the crowd. Buy me a new Oracle VM, I want my competition to be history!”...Yes, baseball is in full swing, and as we make our way to the closing of the quarter, Oracle is ready to “knock it out of the park” with its newly updated release of Oracle VM 3.1. This home run of a server virtualization solution will let you deploy software faster, as it intelligently manages your entire infrastructure, from application to disk. As if that wasn’t enough, the competition can’t even get on base! Have a look at the final score below: Partners will be hitting grand slams left and right because management tools, application templates and single source support, have all teamed up to create one heck of a curve ball for the competition, but more importantly, an absolute first draft pick for our partners. With no license cost and an affordable enterprise support cost, crowds have gathered to see this ‘All Star’ play some hard ball. Watch as Jeff Doolan, Sr. Director of Linux and Virtualization Channel Sales at Oracle, goes into more depth on how Oracle VM is a real game changer and eliminates the competition.Adding to the line-up are two key components of Oracle VM 3.1: Enhanced Ease-of-use: The new GUI design is engineered for faster execution of workflow and to maximize ease of use and reduce deployment time. Administrators have more time to spend at the ball park or focus on the business.New Oracle VM Templates: such as the Oracle E-Business Suite 12.1.3; Oracle PeopleSoft FSCM 9.1; Oracle Enterprise Manager 12c; Oracle Linux 5.8; Oracle Linux 6.1; Oracle Solaris 11 – which add to the existing 100+ existing templates that are ready for download. Oracle VM Templates are pre-configured as an entire stack including OS and application fully tested, production ready and certified from Oracle.For more information on Oracle newest player, Oracle VM 3.1, read this press release or visit our technology information page. Batter Up,The OPN Communications Team

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