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  • Get The Most From MySQL Database With MySQL Performance Tuning Training

    - by Antoinette O'Sullivan
    Get the most from MySQL Server's top-level performance by improving your understanding of perforamnce tuning techniques. MySQL Performance Tuning Class In this 4 day class, you'll learn practical, safe, highly efficient ways to optimize performance for the MySQL Server. You can take this class as: Training-on-Demand: Start training within 24 hours of registering and follow the instructor-led lecture material through streaming video at your own pace. Schedule time lab-time to perform the hands-on exercises at your convenience. Live-Virtual Class: Follow the live instructor led class from your own desk - no travel required. There are already a range of events on the schedule to suit different timezones and with delivery in languages including English and German. In-Class Event: Travel to a training center to follow this class. For more information on this class, to see the schedule or register interest in additional events, go to http://oracle.com/education/mysql Troubleshooting MySQL Performance with Sveta Smirnova  During this one-day, live-virtual event, you get a unique opportunity to hear Sveta Smirnova, author of MySQL Troubleshooting, share her indepth experience of identifying and solving performance problems with a MySQL Database. And you can benefit from this opportunity without incurring any travel costs! Dimitri's Blog If MySQL Performance is a topic that interests you, then you should be following Dimitri Kravtchuk's blog. For more information on any aspect of the Authentic MySQL Curriculum, go to http://oracle.com/education/mysql.

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  • Is there a measure of code rot?

    - by DarenW
    I'm dealing, again, with a messy C++ application, tons of classes with confusing names, objects have pointers into each other and all over, longwinded Boost and STL data types, etc. (Pause and consider your favorite terror of messy legacy code. We probably have it.) The phrase "code rot" oft comes to mind when I work on this project. Is there a quantitative way to measure code rot? I wouldn't expect anything highly meaningful or scientific, since no other measure of code productivity or quality is so fine. I'm not looking for a mere opposite of measures of code quality, but specifically a measure of how many bad things happened after a series of maintenance software "engineers" have had turns hacking at the code. A general measure applying to any language, or many languages, would be great. If there's no such thing, at least for C++, which is a better than average language for creating messes. Maybe something involving a measure of topology of how objects connect during runtime, a count of chunks of commented out code, how mane files a typical variable's usage is scattered over, I don't know... but surely now, a decade into the 21st Century, someone has attempted to define some sort of rot measure. It would be especially interesting to automate a series of svn checkouts, measure the "rottenosity" of each, and plot the decay over time.

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  • Is this information about me as a programmer concise and good enough?

    - by Nick Rosencrantz
    I not only want you to review my resume but please tell me what you think Google means when they answered me: "We don't look at personal letters and we like your resume and we can recommend you internally but we need measurable experience. What is meant with "measurable" here? Do they mean like O(1) compared to O(n), selling an entire company, grades or what? This is what I sent: Curriculum vitae Nick Rosencrantz Competence: System development, web development Technical competence: Java, Javascript, HTML, XML, CSS, AJAX, PHP, SQL, Python Employments: 2012- Mobile Innovation AB System Developer IT consultant (Java programmer) 2011-2012 Bnano International Ltd System Developer Python programming in Google App Engine 2008-2009 Sweden Island AB System Developer Programming C++ and Java EE components 2003-2007 Studies Stockholm School of Economics During studies worked as network technician at Effnet AB 2000-2002 Jadestone AB System Developer System development in Java/J2EE. In 2001: KTH, Assistant. Teaching application server programming in Java Enterprise + weblogic + Informix. 1999-2000 Studies KTH 1996-1998 Spray.se System development, Researcher 1995-1995 Finance broker Backoffice work with financial instruments 1993-1994 Computer & Audio-Technical Systems AB Programming, sommer job Education/Courses: Stockholm School of Economics, Master of Science diploma, KTH, Computer Science undergraduate studies Languages Swedish, English, also some German and French Born 1973, Swedish citizen I also have a project-based CS which is several pages long but the above is about what I was aiming for in the beginning when I was looking for a job, now I have employment as an IT consultant in central Stockholm and I want to make my resume concise and also know what Google meant with their answer (It was a Swedish Google employee that via linkedin recruited from my Stockholm School of Economics groups since that is a small elite economics school where I took my M.Sc. and KTH is one of the largest universities in northern Europe so I sent her a link with my CV and she said she could promote me internally if I added "measurable experience" and I've been thinking for weeks what that may mean?

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  • When is type testing OK?

    - by svidgen
    Assuming a language with some inherent type safety (e.g., not JavaScript): Given a method that accepts a SuperType, we know that in most cases wherein we might be tempted to perform type testing to pick an action: public void DoSomethingTo(SuperType o) { if (o isa SubTypeA) { o.doSomethingA() } else { o.doSomethingB(); } } We should usually, if not always, create a single, overridable method on the SuperType and do this: public void DoSomethingTo(SuperType o) { o.doSomething(); } ... wherein each subtype is given its own doSomething() implementation. The rest of our application can then be appropriately ignorant of whether any given SuperType is really a SubTypeA or a SubTypeB. Wonderful. But, we're still given is a-like operations in most, if not all, type-safe languages. And that seems suggests a potential need for explicit type testing. So, in what situations, if any, should we or must we perform explicit type testing? Forgive my absent mindedness or lack of creativity. I know I've done it before; but, it was honestly so long ago I can't remember if what I did was good! And in recent memory, I don't think I've encountered a need to test types outside my cowboy JavaScript.

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  • What causes bad performance in consumer apps?

    - by Crashworks
    My Comcast DVR takes at least three seconds to respond to every remote control keypress, making the simple task of watching television into a frustrating button-mashing experience. My iPhone takes at least fifteen seconds to display text messages and crashes ¼ of the times I try to bring up the iPad app; simply receiving and reading an email often takes well over a minute. Even the navcom in my car has mushy and unresponsive controls, often swallowing successive inputs if I make them less than a few seconds apart. These are all fixed-hardware end-consumer appliances for which usability should be paramount, and yet they all fail at basic responsiveness and latency. Their software is just too slow. What's behind this? Is it a technical problem, or a social one? Who or what is responsible? Is it because these were all written in managed, garbage-collected languages rather than native code? Is it the individual programmers who wrote the software for these devices? In all of these cases the app developers knew exactly what hardware platform they were targeting and what its capabilities were; did they not take it into account? Is it the guy who goes around repeating "optimization is the root of all evil," did he lead them astray? Was it a mentality of "oh it's just an additional 100ms" each time until all those milliseconds add up to minutes? Is it my fault, for having bought these products in the first place? This is a subjective question, with no single answer, but I'm often frustrated to see so many answers here saying "oh, don't worry about code speed, performance doesn't matter" when clearly at some point it does matter for the end-user who gets stuck with a slow, unresponsive, awful experience. So, at what point did things go wrong for these products? What can we as programmers do to avoid inflicting this pain on our own customers?

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  • What is the advantage of currying?

    - by Mad Scientist
    I just learned about currying, and while I think I understand the concept, I'm not seeing any big advantage in using it. As a trivial example I use a function that adds two values (written in ML). The version without currying would be fun add(x, y) = x + y and would be called as add(3, 5) while the curried version is fun add x y = x + y (* short for val add = fn x => fn y=> x + y *) and would be called as add 3 5 It seems to me to be just syntactic sugar that removes one set of parentheses from defining and calling the function. I've seen currying listed as one of the important features of a functional languages, and I'm a bit underwhelmed by it at the moment. The concept of creating a chain of functions that consume each a single parameter, instead of a function that takes a tuple seems rather complicated to use for a simple change of syntax. Is the slightly simpler syntax the only motivation for currying, or am I missing some other advantages that are not obvious in my very simple example? Is currying just syntactic sugar?

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  • Announcing Oracle-Demantra 12.2.1 Release

    - by user702295
    We are excited to announce Oracle Demantra 12.2.1 is now available for new and existing customers. All customers who are not incorporating Demantra with other VCP products are welcome to upgrade without any restrictions. Customers who are using Demantra in conjunction with VCP products will need to upgrade VCP to 12.2.1 which requires application and participation in Oracle E-Business Suite early adopter program. Demantra 12.2.1 includes a wide array of new features driven by customer requirements and needs. Key features include: ·       Streamlined import and export from Microsoft Excel ·       Support Gregorian Month data aggregation in weekly system ·       Multilanguage support for eleven languages ·       Promotion Calendar Optimization ·       Enhanced integration with Advanced Planning Command Center (VCP 12.2.1 Required) Demantra 12.2.1 will work with JD Edwards EnterpriseOne 9.1 using the AIA 11.4 for the Value Chain Planning Base Integration Pack. Demantra 12.2.1 will only work with VCP 12.2.1. Demantra 12.2.1 and VCP 12.2.1 will work with EBS 12.1.3 or EBS 12.2.1.

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  • People's experience of Cloud Computing (using Force.com)

    - by Digger
    I would like to know about people's experience of working with APEX and the SalesForce.com platform, was it easy to work with? How similar to Java and C# is it? What did you like? What don't you like? Would you recommend it? Do you think cloud computing has a long term successful future? My reason for asking is that I am currently looking at a new position which involves working with APEX on the SalesForce.com platform. The position interests me but I just want to try and understand what I might be signing up for with regards the languages/platform as it is completely different from what I have worked with before. I have seen lots of videos/blog posts online (mainly from the recent Dreamforce event) and they obviously are very positive but I was just after some experiences from developers, both positive and negative. I find cloud computing a very interesting idea, but I am very new to the subject. The position I am looking at offers a fantastic opportunity but I was just after some opinions on APEX and the platform as I have no real world experience just what I have seen from the online videos. I guess ultimately what I am asking is: Are APEX and the SalesForce.com platform good to get involved in? Is development on the Force.com just a "career dead end"? Is cloud computing just a fad? Or does it have a long term future? Apologies in advance if this is the wrong place to ask such a question. Thanks

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  • What steps should I follow to start developing website applications?

    - by Oscar Mederos
    Hello, I've been developing desktop applications for about 4 years, using .NET, C++, C, and a little of Python. I've covered lots of topics while developing my applications, and even web technologies (cookies, GET/POST methods, when programming some scrapers/crawlers). I've been always waiting to start developing websites, preferably using PHP + MySQL, although other advises will be welcomed to make this question more useful and generic for others. I know I could use a CMS instead of starting from scratch, but sometimes I don't need an entire CMS to do minor things... What steps should I follow to create a website? Let's suppose I have a web designer. First of all, the designer designs the entire website (CSS, etc) and then I do the programming stuffs, like loading dynamically things from databases, doing some client-side stuffs with javascript, etc? Or how is the best way to do it? Edit: I'm not looking for tools/frameworks/languages suggestions. What I want to know is how a team (or a developer with a designer) starts creating a website. The steps they do, what tasks they do first, how they integrate the work, etc. An example of an answer could be: 1) Design the entire website with good CSS practices, using containers instead of tables in some cases, etc. 2) Use that design and develop the logic or the functionalities of the website. Of course, that's just an example. I'm looking for a good way to approach it, because I've been wanting to start on it but don't really know how exactly to organize the job :/

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  • Why do you hate Java? Is it the language or the framework? [closed]

    - by zneak
    According to you all, Java is the third most-hated language here. The two other most hated languages are PHP and VBScript. (It's quite funny how they stand together on the podium.) I'd like to make it known that the question mostly addresses people who don't like Java. I assume here a number of subjective opinions as facts because they're usually considered true among people who don't like Java, and I don't want to be convinced otherwise here. If you're a Java enthusiast, you might find this question frustrating. It's never been made clear if people hate Java itself, or if they hate it because of the framework, or if it's a mixture of the two. On a side you have the language, where you have: the "everything should be an object" philosophy, even in instances where it should obviously be something else (event handlers I'm pointing you); checked exceptions; the idea that all logic should be presented as methods and properties is a big no-no; the fact that "closures" created by anonymous types only include final variables and arguments, but will allow write access to any member of the parent class; a few more. On the other side, you have the JDK, with... its load of inconsistencies and overengineering; monolithic class hierarchies; meaningless base exceptions like IOException (though other frameworks have similar exception hierarchies); sluggish responsiveness even with Swing; a few more. My question is, do you think that, if either one (Java or the JDK) was taken alone, and the other was dropped in favor of something else, the new combination would be better? For instance, if you could use the C# syntax with the JDK (adapting get*/set* methods into properties, and interfaces with only one method into delegates), or the Java syntax with the .NET Framework (doing the inverse transformations), would things get better in your opinion?

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  • CodePlex Daily Summary for Saturday, June 02, 2012

    CodePlex Daily Summary for Saturday, June 02, 2012Popular ReleasesZXMAK2: Version 2.6.2.3: - add support for ZIP files created on UNIX system; - improve WAV support (fixed PCM24, FLOAT32; added PCM32, FLOAT64); - fix drag-n-drop on modal dialogs; - tape AutoPlay feature (thanks to Woody for algorithm)Librame Utility: Librame Utility 3.5.1: 2012-06-01 ???? ?、????(System.Web.Caching ???) 1、??????(? Librame.Settings ??); 2、?? SQL ????; 3、??????; 4、??????; ?、???? 1、????:??MD5、SHA1、SHA256、SHA384、SHA512?; 2、???????:??BASE64、DES、??DES、AES?; ?:???? GUID (???????)??KEY,?????????????。 ?、????? 1、?????、??、?????????; 2、??????????; ?:??????????????(Enum.config)。 ?、???? 1、??????、??、??、??、????????; 2、?????????????????; ?、?????? 1、????? XML ? JSON ?????????(??? XML ??); ?、????? 1、??????????(??? MediaInfo.dll(32?)??); 2、????????(??? ffmpeg...TestProject_Git: asa: asdf.Net Code Samples: Full WCF Duplex Service Example: Full WCF Duplex Service ExampleVivoSocial: VivoSocial 2012.06.01: Version 2012.06.01 of VivoSocial has been released. If you experienced any issues with the previous version, please update your modules to the 2012.06.01 release and see if they persist. You can download the new releases from social.codeplex.com or our downloads page. If you have any questions about this release, please post them in our Support forums. If you are experiencing a bug or would like to request a new feature, please submit it to our issue tracker. This release has been tested on ...Kendo UI ASP.NET Sample Applications: Sample Applications (2012-06-01): Sample application(s) demonstrating the use of Kendo UI in ASP.NET applications.Better Explorer: Better Explorer Beta 1: Finally, the first Beta is here! There were a lot of changes, including: Translations into 10 different languages (the translations are not complete and will be updated soon) Conditional Select new tools for managing archives Folder Tools tab new search bar and Search Tab new image editing tools update function many bug fixes, stability fixes, and memory leak fixes other new features as well! Please check it out and if there are any problems, let us know. :) Also, do not forge...myManga: myManga v1.0.0.3: Will include MangaPanda as a default option. ChangeLog Updating from Previous Version: Extract contents of Release - myManga v1.0.0.3.zip to previous version's folder. Replaces: myManga.exe BakaBox.dll CoreMangaClasses.dll Manga.dll Plugins/MangaReader.manga.dll Plugins/MangaFox.manga.dll Plugins/MangaHere.manga.dll Plugins/MangaPanda.manga.dllPlayer Framework by Microsoft: Player Framework for Windows 8 Metro (Preview 3): Player Framework for HTML/JavaScript and XAML/C# Metro Style Applications. Additional DownloadsIIS Smooth Streaming Client SDK for Windows 8 Microsoft PlayReady Client SDK for Metro Style Apps Release notes:Support for Windows 8 Release Preview (released 5/31/12) Advertising support (VAST, MAST, VPAID, & clips) Miscellaneous improvements and bug fixesMicrosoft Ajax Minifier: Microsoft Ajax Minifier 4.54: Fix for issue #18161: pretty-printing CSS @media rule throws an exception due to mismatched Indent/Unindent pair.Silverlight Toolkit: Silverlight 5 Toolkit Source - May 2012: Source code for December 2011 Silverlight 5 Toolkit release.Json.NET: Json.NET 4.5 Release 6: New feature - Added IgnoreDataMemberAttribute support New feature - Added GetResolvedPropertyName to DefaultContractResolver New feature - Added CheckAdditionalContent to JsonSerializer Change - Metro build now always uses late bound reflection Change - JsonTextReader no longer returns no content after consecutive underlying content read failures Fix - Fixed bad JSON in an array with error handling creating an infinite loop Fix - Fixed deserializing objects with a non-default cons...DotNetNuke® Community Edition CMS: 06.02.00: Major Highlights Fixed issue in the Site Settings when single quotes were being treated as escape characters Fixed issue loading the Mobile Premium Data after upgrading from CE to PE Fixed errors logged when updating folder provider settings Fixed the order of the mobile device capabilities in the Site Redirection Management UI The User Profile page was completely rebuilt. We needed User Profiles to have multiple child pages. This would allow for the most flexibility by still f...????: ????2.0.1: 1、?????。WiX Toolset: WiX v3.6 RC: WiX v3.6 RC (3.6.2928.0) provides feature complete Burn with VS11 support. For more information see Rob's blog post about the release: http://robmensching.com/blog/posts/2012/5/28/WiX-v3.6-Release-Candidate-availableJavascript .NET: Javascript .NET v0.7: SetParameter() reverts to its old behaviour of allowing JavaScript code to add new properties to wrapped C# objects. The behavior added briefly in 0.6 (throws an exception) can be had via the new SetParameterOptions.RejectUnknownProperties. TerminateExecution now uses its isolate to terminate the correct context automatically. Added support for converting all C# integral types, decimal and enums to JavaScript numbers. (Previously only the common types were handled properly.) Bug fixe...Phalanger - The PHP Language Compiler for the .NET Framework: 3.0 (May 2012): Fixes: unserialize() of negative float numbers fix pcre possesive quantifiers and character class containing ()[] array deserilization when the array contains a reference to ISerializable parsing lambda function fix round() reimplemented as it is in PHP to avoid .NET rounding errors filesize bypass for FileInfo.Length bug in Mono New features: Time zones reimplemented, uses Windows/Linux databaseSharePoint Euro 2012 - UEFA European Football Predictor: havivi.euro2012.wsp (1.1): New fetures:Admin enable / disable match Hide/Show Euro 2012 SharePoint lists (3 lists) Installing SharePoint Euro 2012 PredictorSharePoint Euro 2012 Predictor has been developed as a SharePoint Sandbox solution to support SharePoint Online (Office 365) Download the solution havivi.euro2012.wsp from the download page: Downloads Upload this solution to your Site Collection via the solutions area. Click on Activate to make the web parts in the solution available for use in the Site C...????SDK for .Net 4.0+(OAuth2.0+??V2?API): ??V2?SDK???: ?????????API?? ???????OAuth2.0?? ????:????????????,??????????“SOURCE CODE”?????????Changeset,http://weibosdk.codeplex.com/SourceControl/list/changesets ???:????????,DEMO??AppKey????????????????,?????AppKey,????AppKey???????????,?????“????>????>????>??????”LINQ_Koans: LinqKoans v.02: Cleaned up a bitNew ProjectsAppleScript Slim: A super slimmed down library allowing you to execute AppleScript from your mono project (from your non MonoMac project).Ateneo Libri: Progetto web per la compravendita di libri universitariAzurehostedservicedashboard: Azure Hosted Service Dashboardcampus: Proyecto de pueba de MVC3 y codeplexDot Net Code Comment Analyzer: This Visual studio 2010 plugin, can count the comments in the C# code in the currently open solution in VS IDE. It shows a summary of the comments across all c# files in the project. this is useful when we want to enforce code comments , Code comments help in maintaining the code base , understanding code faster than going through the lines of code, makes code less dependant on a developer Individual.firstteamproject: H?c tfsFITClub: FITClub is platform fighting arcade game for 2 to 4 players. Enemies are controlled by AI. The goal is to force enemies down into the water or lava and keep safe from their attacks. You collect items to temporarily change your abilities. Multiplayer between more phones is coming soon.Jumpstart Branding for Sharepoint 2010: Basic Master Pages for SharePoint 2010 including a general, minified, heavily commented version of v4.master, a centered, fixed width, minified, commented Master Page and two Visual Studio 2010 solutions, one for farms and a second for sandboxes, to help you create a feature for deploying your Master Pages and other branding assets. Jumptart Branding for SP 2010 has been designed to help you quickly and easily jumpstart your next SharePoint 2010 Branding project.KelControl: Programme exe de controle d'activites. 1 - controle de la reponses de site web - http webrequest d'une Url - analyse du retour ( enetete http) - si ok ( Appel ws similaire a etat mais independant a faire apres niveau 4) - si erreur ( appel ws incrementer l'erreur) (par exemple au bout de 3 erreur declanchement alerte) dans un 1er temp on ne s'occupe pas du ws on inscrit les actions dans un fichier txt par exemple. process complet: - timer 15 minutes (param...KHTest: Visual Studio ??Librame Utility: Librame Utility 3.5.1Linux: this is the Linux project.Magic Morse: ?????????Maps: this is the Maps project.Mark Tarefas: Controlador de Tarefas para Mark AssessoriaMaxxFolderSize: MaxxUtils.FolderSizeMCTSTestCode: Project to hold code tried during learning MCTS CertificationMOBZHash: MOBZHash shows MD5 or SHA hash values for files, and reports files with identical hashes (which are most likely duplicates).NandleNF: Nandle NFNginx: this is the Nginx project. Oficina_SIGA: Siga, é um sistema de gerenciamento de oficinas.Plug-in: this is the Plug-in project.SharePoint Comments Anywhere: This is a very simple project which provides a commenting web part and a list template with the instance to store user's comments. SharePoint OTB only provides commenting capability on the Blog sites where users add their posts and anyone can view the page and add comments. Comments Anywhere can be configured on any list, pages library or any page of the SharePoint site with a web part zone enabling users to add their comments virtually anywhere you as an admin or a power user of your s...SharePoint Site Owners Webpart: SharePoint web part to display SharePoint site owners.Tarea AACQ: Proyecto para tarea FACCI 4A 01/06/12testprjct: test summaryTirailleur: Tirailleur code can be used to model an expanding wildfire (forest fire) perimeter. The code is implemented in VB.NET, and should be easy to translate to other languages. There are just a couple of classes handling the important work. These can be extracted and imported to another program. The code here includes some dummy client objects to represent the containing program. webdama: italian checkers game c#Webowo: wbowo projekt test obslugi tortoise i coldplex

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  • Spell check web pages using Firefox plugin

    - by Gopinath
    Having spelling mistakes on a website degrades customer experience by many times. Developers and website content creators spend good amount of time in going through the content manually to make sure that there are no spelling mistakes. At times few mistakes slip in as manual process is error prone. There are few web services and tool available in the market which provide automated spell checking services but they have certain limitations like – high fees to use the service, limitation on the number of pages they scan for errors, privacy issues, etc. What about a free tool that runs locally on your PC and spell checks unlimited web pages? Here comes Spell Checker extension for  Firefox web browser. This free Firefox extension is developed by  Gaurang, a Software Test Engineer based out in India. Once the extension is installed it adds a new context menu “Check Spelling” and a small icon to Add-On bar. To check spellings of a web page just click on the icon or the context menu and it will highlight all the errors on the page. By default SpellChecker extension uses US English dictionary to find spell mistakes and supports spell checking in other languages with installation of dictionaries. Download SpellChecker Extension for Firefox. Spell check dictionaries:  US-English , GB English and  Australian English

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  • Alternatives to Professional Version Control

    - by greengit
    We're teaming up with some non programmers (writers) who need to contribute to one of our projects. Now they just don't like the idea of using Git (or anything for that matter) for version controlling their work. I think this is because they just don't find it worthwhile to wrap their heads around the twisted concepts of version control. (when I first introduced them to branching and merging -- they looked like I was offending them.) Now, we're not in a position to educate them or convince them to use it. We're just trying to find alternatives so that we get all their work versioned (which is what we need) -- and they get easy workflow and concentrate on what they do. I have come up with some ideas... tell them to save their work as a separate file every time they make some non-trivial change, and then use a diff on our side to just track changes. write a program (in Python) that implements the "milestones" in CSSEdit in some way. About the project: It is a natural language processing system (written in C + Python). We've hired some writers to prepare inputs for the system in different languages. And as we evolve the software, we'd need those writers to make changes to their inputs (articles). Sometimes the changes are very small (a word or two), and other times big. The reason we need to version control those changes is because every small/big change in the input has the potential to change the system's output dramatically.

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  • Duck checker in Python: does one exist?

    - by elliot42
    Python uses duck-typing, rather than static type checking. But many of the same concerns ultimately apply: does an object have the desired methods and attributes? Do those attributes have valid, in-range values? Whether you're writing constraints in code, or writing test cases, or validating user input, or just debugging, inevitably somewhere you'll need to verify that an object is still in a proper state--that it still "looks like a duck" and "quacks like a duck." In statically typed languages you can simply declare "int x", and anytime you create or mutate x, it will always be a valid int. It seems feasible to decorate a Python object to ensure that it is valid under certain constraints, and that every time that object is mutated it is still valid under those constraints. Ideally there would be a simple declarative syntax to express "hasattr length and length is non-negative" (not in those words. Not unlike Rails validators, but less human-language and more programming-language). You could think of this as ad-hoc interface/type system, or you could think of it as an ever-present object-level unit test. Does such a library exist to declare and validate constraint/duck-checking on Python-objects? Is this an unreasonable tool to want? :) (Thanks!) Contrived example: rectangle = {'length': 5, 'width': 10} # We live in a fictional universe where multiplication is super expensive. # Therefore any time we multiply, we need to cache the results. def area(rect): if 'area' in rect: return rect['area'] rect['area'] = rect['length'] * rect['width'] return rect['area'] print area(rectangle) rectangle['length'] = 15 print area(rectangle) # compare expected vs. actual output! # imagine the same thing with object attributes rather than dictionary keys.

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  • Please recommend a patterns book for iOS development

    - by Brett Ryan
    I've read several books on iOS development and Objective-C, however what a lot of them teach is how to work with interfaces and all contain the model inside the view controller, i.e. a UITableViewController based view will simply have an NSArray as it's model. I'm interested in what the best practices are for designing the structure of an application. Specifically I'm interested in best practices for the following: How to separate a model from the view controller. I think I know how to do this by simply replacing the NSArray style example with a specific model object, however what I do not know how to do is alert the view when the model changes. For example in .NET I would solve this by conforming to INotifyPropertyChanged and databinding, and similarly with Java I would use PropertyChangeListener. How to create a service model for my domain objects. For example I want to learn the best way to create a service for a hypothetical Widget object to manage an internal DB and also services for communicating with remote endpoints. I need to learn the best ways to do this in a way that interface components can subscribe to events such as widgetUpdated. These services should be singleton classes and some how dependency injected into model/controller objects. Books I've read so far are: Programming in Objective-C (4th Edition) Beginning iOS 5 Development: Exploring the iOS SDK The iOS 5 Developer's Cookbook: Expanded Electronic Edition: Essentials and Advanced Recipes for iOS Programmers Learn Objective-C on the Mac: For OS X and iOS I've also purchased the following updated books but not yet read them. The Core iOS 6 Developer's Cookbook (4th edition Programming in Objective-C (5th Edition) I come from a Java and C# background with 15 years experience, I understand that many of the ways I would do things in these languages may not fit to the ObjC way of developing applications. Any guidance on the topic is very much appreciated.

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  • SEO for Country & Language Specific content.

    - by kecebongsoft
    Currently I am creating a website which has a common topic for an article, but it's going to be different content for each country, and also, each of that content will be provided in several languages. And this mechanism exists in most of the parts in the website. For example, I have an article about tax. This article has to be different for each country, for example china. And tax content for china should be written in china AND english language (for non china-speaker). What is the best URL pattern to handle this? What I've been thinking is, using a sub folder (/country-code/language-code/) such as: www.example.com/cn/cn/tax www.example.com/cn/en/tax Or using top level domain such as: www.example.cn/cn/tax www.example.cn/en/tax Or subdomain such as cn.example.com/cn/tax cn.example.com/en/tax I think I will not prefer the last option since I might need to use subdomain for other purpose. Which left only subfolder and TLDN. I've read some articles saying that TLDN is good for localized content (language-specific content), but in my case, my TLDN will also has english contents (for non local speaker) which is specific only to that particular country (also the purpose of this is to let people from other country easily search it through google). What is the best pattern to pick and why?.

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  • Set Up Anti-Brick Protection to Safeguard and Supercharge Your Wii

    - by Jason Fitzpatrick
    We’ve shown you how to hack your Wii for homebrew software, emulators, and DVD playback, now it’s time to safeguard your Wii against bricking and fix some annoyances—like that stupid “Press A” health screen. The thing about console modding and jailbreaking—save for the rare company like Amazon that doesn’t seem to care—is companies will play a game of cat and mouse to try and knock modded console out of commission, undo your awesome mods, or even brick your device. Although extreme moves like bricktacular-updates are rare once you modify your device you have to be vigilante in protecting it against updates that could hurt your sweet setup. Today we’re going to walk you through hardening your Wii and giving it the best brick protection available Latest Features How-To Geek ETC The 50 Best Registry Hacks that Make Windows Better 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 Snowy Christmas House Personas Theme for Firefox The Mystic Underground Tunnel Wallpaper Ubunchu! – The Ubuntu Manga Available in Multiple Languages Breathe New Life into Your PlayStation 2 Peripherals by Hooking Them Up to Your Computer Move the Window Control Buttons to the Left Side in Windows Fun and Colorful Firefox Theme for Windows 7

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  • Issue 55 - Skin Object Tokens, Optimized Control Panel, OWS Validation and Security, RAD

    April 2010 Welcome to Issue 55 of DNN Creative Magazine In this issue we focus on the new Skin Object token method introduced in DotNetNuke 5 for adding tokens into a DotNetNuke skin. A Skin Object Token is a web user control which covers skin elements such as the logo, menu, search, login links, date, copyright, languages, links, banners, privacy, terms of use, etc. Following this we demonstrate how to install and use two Advanced DotNetNuke Admin Control Panels which are available for free from Oliver Hine. These control panels provide an optimized version of the admin control panel to improve performance and page load times, as well as a ribbon bar control panel which adds additional features. Next, we continue the Open Web Studio tutorials, this month we demonstrate some very advanced techniques for building a car parts application in Open Web Studio. Throughout the tutorial we cover form input, validation, how to use dependant drop down lists, populating checkbox lists and introduce a new concept of data level security. Data level security allows you to control which data a user can access within a module. To finish, we have part five of the "How to Build a News Application with DotNetMushroom Rapid Application Developer (RAD)" article, where we demonstrate how to implement paging. This issue comes complete with 14 videos. Skinning: Skin Object Tokens for DotNetNuke 5 (8 videos - 64mins) Free Module: Advanced Optimized Control Panel by Oliver Hine (1 video - 11mins) Module Development Series: Form Validation, Dependant Drop Downs and Data Level Security in OWS (5 videos - 44mins) How to Implement Paging with DotNetMushroom RAD View issue 55 to download all of the videos in one zip file DNN Creative Magazine for DotNetNuke Web Designers Covering DotNetNuke module video reviews, video tutorials, mp3 interviews, resources and web design tips for working with DotNetNuke. In 55 issues we have created 563 videos!Did you know that DotNetSlackers also publishes .net articles written by top known .net Authors? We already have over 80 articles in several categories including Silverlight. Take a look: here.

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  • Why do programmers seem to be such bad spellers?

    - by Joel Etherton
    Programming languages are very precise tools based on explicit grammars. They're very picky, and when being used they require an exacting amount of detail. C#, for instance, is case sensitive so even getting the case of an argument wrong will cause an error. Questions asked all over the StackExchange are replete with misspellings, grammatical errors, and other problems that seem to indicate a lack of attention to detail when it comes to the language itself. Now, I understand there are a lot of programmers out there whose native language is not English, and I am not directing this question (rant one might say) at them. I'm referring to the individuals who are clearly from an English speaking background who refuse to pay attention to these simple details. I am not perfect by any means, but I try to use the language correctly so that my meaning will be understood correctly. I find programmers misspelling variable names, classes, and all manner of words in any kind of technical documentation they might write. I have had to withstand code where I am repeatedly referring to the subit[sic] button or HttpWebResponse reponse. The general complaint about bad spelling is one thing, and it will always be there. I accept that. But my question/comment is about the proclivity of bad spelling within the programming community. I would think that people who deal with such exacting tools to be more naturally predisposed towards proper spelling. Yet this doesn't seem to be the case.

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  • Games Localization: Cultural Points

    - by ultan o'broin
    Great article about localization considerations, this times in the games space. Well worth checking out. It's rare to see such all-encompassing articles about localization considerations aimed at designers. That's a shame. The industry assumes all these things are known. The evidence from practice is that they're not and also need constant reinforcement. We're not in the games space in enterprise applications yet. However, there may be a role for them in the training space but also in CRM, building relationships and contacts. Beyond the obvious considerations, check out the cultural aspects of games localization too. For example, Zygna's offerings, which you might have played on Facebook: Zynga, which can lay claim to the two most popular social games on Facebook - FarmVille and CityVille - has recently localized both games for international audiences, and while CityVille has seen only localization for European languages, FarmVille has been localized for China, which involved rebuilding the game from the ground up. This localization process involved taking into account cultural considerations including changing the color palette to be brighter and increasing the size of the farm plots, to appeal to Chinese aesthetics and cultural experience. All the more reason to conduct research in your target markets, worldwide.

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  • Unit testing statically typed functional code

    - by back2dos
    I wanted to ask you people, in which cases it makes sense to unit test statically typed functional code, as written in haskell, scala, ocaml, nemerle, f# or haXe (the last is what I am really interested in, but I wanted to tap into the knowledge of the bigger communities). I ask this because from my understanding: One aspect of unit tests is to have the specs in runnable form. However when employing a declarative style, that directly maps the formalized specs to language semantics, is it even actually possible to express the specs in runnable form in a separate way, that adds value? The more obvious aspect of unit tests is to track down errors that cannot be revealed through static analysis. Given that type safe functional code is a good tool to code extremely close to what your static analyzer understands. However a simple mistake like using x instead of y (both being coordinates) in your code cannot be covered. However such a mistake could also arise while writing the test code, so I am not sure whether its worth the effort. Unit tests do introduce redundancy, which means that when requirements change, the code implementing them and the tests covering this code must both be changed. This overhead of course is about constant, so one could argue, that it doesn't really matter. In fact, in languages like Ruby it really doesn't compared to the benefits, but given how statically typed functional programming covers a lot of the ground unit tests are intended for, it feels like it's a constant overhead one can simply reduce without penalty. From this I'd deduce that unit tests are somewhat obsolete in this programming style. Of course such a claim can only lead to religious wars, so let me boil this down to a simple question: When you use such a programming style, to which extents do you use unit tests and why (what quality is it you hope to gain for your code)? Or the other way round: do you have criteria by which you can qualify a unit of statically typed functional code as covered by the static analyzer and hence needs no unit test coverage?

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  • SQL Saturday #220 - Atlanta - Pre-Conference Scholarships!

    - by Most Valuable Yak (Rob Volk)
    We Want YOU…To Learn! AtlantaMDF and Idera are teaming up to find a few good people. If you are: A student looking to work in the database or business intelligence fields A database professional who is between jobs or wants a better one A developer looking to step up to something new On a limited budget and can’t afford professional SQL Server training Able to attend training from 9 to 5 on May 17, 2013 AtlantaMDF is presenting 5 Pre-Conference Sessions (pre-cons) for SQL Saturday #220! And thanks to Idera’s sponsorship, we can offer one free ticket to each of these sessions to eligible candidates! That means one scholarship per Pre-Con! One Recipient Each will Attend: Denny Cherry: SQL Server Security http://sqlsecurity.eventbrite.com/ Adam Machanic: Surfing the Multicore Wave: Processors, Parallelism, and Performance http://surfmulticore.eventbrite.com/ Stacia Misner: Languages of BI http://languagesofbi.eventbrite.com/ Bill Pearson: Practical Self-Service BI with PowerPivot for Excel http://selfservicebi.eventbrite.com/ Eddie Wuerch: The DBA Skills Upgrade Toolkit http://dbatoolkit.eventbrite.com/ If you are interested in attending these pre-cons send an email by April 30, 2013 to [email protected] and tell us: Why you are a good candidate to receive this scholarship Which sessions you’d like to attend, and why (list multiple sessions in order of preference) What the session will teach you and how it will help you achieve your goals The emails will be evaluated by the good folks at Midlands PASS in Columbia, SC. The recipients will be notified by email and announcements made on May 6, 2013. GOOD LUCK! P.S. - Don't forget that SQLSaturday #220 offers free* training in addition to the pre-cons! You can find more information about SQL Saturday #220 at http://www.sqlsaturday.com/220/eventhome.aspx. View the scheduled sessions at http://www.sqlsaturday.com/220/schedule.aspx and register for them at http://www.sqlsaturday.com/220/register.aspx. * Registration charges a $10 fee to cover lunch expenses.

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  • How to set acpi=off for installation?

    - by Johan Helgø
    I'm trying to install Ubuntu 12.04 LTS 64bit from a USB created in Windows using the recommended software from pendrivelinux. The USB is tested on two laptops and works fine. The install does not work on my desktop PC, it either hangs with lots of text on the screen, or it just gives me a screen with garbled colors. Right now it hangs on "[3.925311] Initializing USB Mass Storage driver...", but it hangs on different spots every time I try. I know that acpi=off will fix this. On older versions, there used to be a pink screen with the icon of a keyboard, at that screen I could press ESC, and I would then get a long list of languages, I could choose English, and then I would get options for setting acpi=off, then install without any problems. This new install menu does not have those options. The (now black and white) "Installer boot menu"'s advanced options is blank. There simply are no advanced options. If I go to help, then press F6, I get to a help screen describing the different boot parameters. I see examples of writing "Install acpi=off" However, writing "install acpi=off" it gives an error saying "could not find kernel image: install". How can I install Ubuntu 12.04 with acpi=off? (Oh, btw, nothing happens if I press F6 in the "Installer boot menu")

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  • Creating reproducible builds to verify Free Software

    - by mikkykkat
    Free Software is about freedom and privacy, Open Source software is great but making that fully practical usually won't happen. Most Free Software developers publicize binaries that we can't verify are really compiled from the source code or have something bad injected already! We have the freedom to change the code, but privacy for ordinary users is missing. For desktop software there is a lot of languages and opportunities to create Free Software with a reproducible build process (compiling source code to always produce the exact same binary), but for mobile computing I don't know if same thing is possible or not? Mobile devices are probably the future of computing and Android is the only Open Source environment so far which accept Java for coding. Compiling same Android application won't result in the exact same binary every time. For Open Source Android apps how we can verify the produced binary (.apk) is really compiled from the source code? Is there any way to create reproducible builds from the Android SDK or does Java fail here for Free Software? is there any java software ever wrote with a reproducible build?

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  • Functional Methods on Collections

    - by GlenPeterson
    I'm learning Scala and am a little bewildered by all the methods (higher-order functions) available on the collections. Which ones produce more results than the original collection, which ones produce less, and which are most appropriate for a given problem? Though I'm studying Scala, I think this would pertain to most modern functional languages (Clojure, Haskell) and also to Java 8 which introduces these methods on Java collections. Specifically, right now I'm wondering about map with filter vs. fold/reduce. I was delighted that using foldRight() can yield the same result as a map(...).filter(...) with only one traversal of the underlying collection. But a friend pointed out that foldRight() may force sequential processing while map() is friendlier to being processed by multiple processors in parallel. Maybe this is why mapReduce() is so popular? More generally, I'm still sometimes surprised when I chain several of these methods together to get back a List(List()) or to pass a List(List()) and get back just a List(). For instance, when would I use: collection.map(a => a.map(b => ...)) vs. collection.map(a => ...).map(b => ...) The for/yield command does nothing to help this confusion. Am I asking about the difference between a "fold" and "unfold" operation? Am I trying to jam too many questions into one? I think there may be an underlying concept that, if I understood it, might answer all these questions, or at least tie the answers together.

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