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• Why do we keep using CSV?

  - by Stephen

  Why do we keep using CSV? I recently made a shift to working the health domain and despite the wonderful work in data transfer standards, all data transfer is in CSV, both for reporting to external organisations, and for data migrations when implementing new systems. Unfortunately the use of CSV is the cause of the endless repetition of the same stupid errors, with the same waste of developer time. (bad escaping, failing to handle null fields etc.) I know we can do better, and anything between JSON and XML (depending on the instance) would be fine. (Most of the time this is data going from one MS SQLserver 2005 to another!) I feel as if each time I see this happening I am literally watching one developer waste anothers time. So why do we keep shafting each other? When will we stop?

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• Method chaining vs encapsulation

  - by Oak

  There is the classic OOP problem of method chaining vs "single-access-point" methods: main.getA().getB().getC().transmogrify(x, y) vs main.getA().transmogrifyMyC(x, y) The first seems to have the advantage that each class is only responsible for a smaller set of operations, and makes everything a lot more modular - adding a method to C doesn't require any effort in A, B or C to expose it. The downside, of course, is weaker encapsulation, which the second code solves. Now A has control of every method that passes through it, and can delegate it to its fields if it wants to. I realize there's no single solution and it of course depends on context, but I would really like to hear some input about other important differences between the two styles, and under what circumstances should I prefer either of them - because right now, when I try to design some code, I feel like I'm just not using the arguments to decide one way or the other.

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• New Development Snapshot

  I've integrated OpenJDK 6 b18. If you're building IKVM from source, you need to download openjdk6-b18-stripped.zip. Changes: Integrated OpenJDK 6 b18. Fixed IKVM.Reflection bug in version number handling (for version parts 32K). Added support for generic parameter custom attributes to IKVM.Reflection (this is missing from June 2006 ECMA CLI spec). Fixed IKVM.Reflection Type.FullName bug. Nested types can also have a namespace...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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• DDD and validation of aggregate root

  - by Mik378

  Suppose an aggregate root : MailConfiguration (wrapping an AddressPart object). The AddressPart object is a simple immutable value object with some fields like senderAdress, recipentAddress (to make example simple). As being an invariant object, AddressPart should logically wrap its own Validator (by the way of external a kind of AddressValidator for respecting Single Responsibility Principle) I read some articles that claimed an aggregateRoot must validate its 'children'. However, if we follow this principle, one could create an AddressPart with an uncohesive/invalid state. What are your opinion? Should I move the collaborator AddressValidator(used in constructor so in order to validate immediately the cohesion of an AddressPart) from AddressPart and assign it to aggregateRoot (MailConfiguration) ?

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• Scheme of work contract

  - by Tommy

  I'm in the process of setting up a (one man) company and got to a item on my list "contracts and insurance". I will primary be offering custom software development but may also offer some "open source solutions", install, configure / manage e.t.c. I'm not sure how to approach a contract with a potential customer. I want to be flexible and offer the customer rights over the product (when not using open source of course) but I obviously want / need to be able to reuse code, already written and any future work. Is this possible or is it just something that people do but strictly they shouldn't? Is there a standard freelancing / contacting developer agreement? Going to a lawyer I'm sure is an answer but a very expensive one! If not do you end up with a fresh contract with each job / client and lots of trips to solicitors?

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• Nautilus tags/labels/marks/emblems for directories

  - by madox2

  Is there any way how to mark folders or files with tags(or labels or whatever) in Nautilus? It would be nice to sort marked folders or files through this tags. I am familiar with emblems but I cant sort through it and its complicated to assign emblem to folder(3 clicks at least). Especially my first idea was to mark folders in my Movie directory with tags seen, not seen, must see, and so on. Then I realized it would be useful in any other workspace with any custom tags... Is there any nautilus extension for this? Or any other file manager which can do this?

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• creating object parameters in {}?

  - by RealityDysfunction

  I am trying to decode a piece of code from a book: List<Person> people = new List<Person>() { new Person {FirstName="Homer",LastName="Simpson",Age=47}, new Person {FirstName="Marge",LastName="Simpson",Age=45} }; Person is just a simple class they made, with a bunch of fields: Name, Last Name, etc... What I don't understand is, don't we send parameters to a constructor of Person in non-curly brackets? I tried replicating this code, but it doesn't seem to fly, any takers? Thanks for input.

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• How to point DNS records to Amazon AWS Elastic Beanstalk

  - by Lance

  I just created a new environment with AWS and uploaded a .zip file into elastic beanstalk. I used to have a friend's server host my site instead of GoDaddy so I changed my custom DNS name servers from pointing to my friend's server to GoDaddy's. AWS told me that I need I need to add a CNAME record on GoDaddy and I did. The alias is lance and the host is lance-env.elasticbeanstalk.com. I know that this change can take 24-48 hours to take effect but it's been a day already and when I go to my site, a default page from GoDaddy appears. I'm very new to AWS and would just like to find a way for AWS to host my site other than using Route53.

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• Is there a quasi-standard set of attributes to annotate thread safety, immutability etc.?

  - by Eugene Beresovksy

  Except for a blog post here and there, describing the custom attributes someone created, but that do not seem to get any traction - like one describing how to enforce immutability, another one on Documenting Thread Safety, modeling the attributes after JCIP annotations - is there any standard emerging? Anything MS might be planning for the future? This is something that should be standard, if there's to be any chance of interoperability between libraries concurrency-wise. Both for documentation purposes, and also to feed static / dynamic test tools. If MS isn't doing anything in that direction, it could be done on CodePlex - but I couldn't find anything there, either. <opinion>Concurrency and thread safety are really hard in imperative and object-languages like C# and Java, we should try to tame it, until we hopefully switch to more appropriate languages.</opinion>

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• GNOME 3.4 released, with smooth & fast magnification

  - by Peter Korn

  The GNOME community released GNOME 3.4 today. This release contains several new accessibility features, along with a new set of custom high-contrast icons which improve the user experience for users needing improved contrast. This release also makes available the AEGIS-funded GNOME Shell Magnifier. This magnifier leverages the powerful graphics functionality built into all modern video cards for smooth and fast magnification in GNOME. You can watch a video of that magnifier (with the previous version of the preference dialog), which shows all of the features now available in GNOME 3.4. This includes full/partial screen magnification, a magnifier lens, full or partial mouse cross hairs with translucency, and several mouse tracking modes. Future improvements planned for GNOME 3.6 include focus & caret tracking, and a variety of color/contrast controls.

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• The Internet from a 1990s Point of View [Video]

  - by Asian Angel

  Are you ready for a retro look at the Internet? Then prepare to journey back in time to 1995 with this video and its view of the early days of the Internet. From YouTube: Trine Gallegos hosts this segment shot in 1995 when the Internet was first becoming an icon. This is an interesting look back at how clunky the applications were. I don’t even think they were using a computer mouse yet. Internet – from the 1990′s point of view [via Fail Desk] How to Own Your Own Website (Even If You Can’t Build One) Pt 1 What’s the Difference Between Sleep and Hibernate in Windows? Screenshot Tour: XBMC 11 Eden Rocks Improved iOS Support, AirPlay, and Even a Custom XBMC OS

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• Google I/O 2012 - A Master Class in Map Styling

  Google I/O 2012 - A Master Class in Map Styling Scott Shawcroft, Jonah Jones Custom Styled Maps allow developers to customize the look and feel of the underlying Google Maps tiles. This makes it really easy to make a great looking map. You can tailor your map to your message, to your color scheme, or to help emphasize your data. In this class, master maps designers will help you build beautiful, elegant styles that make your maps work for you. For all I/O 2012 sessions, go to developers.google.com From: GoogleDevelopers Views: 23 0 ratings Time: 38:21 More in Science & Technology

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• Constructive criticism for my bounce rate being so high [closed]

  - by Daniel

  The bounce rate on my website's product pages is 80%, which is terrible. Could you offer any opinions on whether you consider the user experience to be bad, and how I could possibly improve it? Other pages, such as the home and category pages, have acceptable bounce rates, but the vast majority of my traffic lands on the product pages. I already tried removing some Google ads for a couple of days, but this didn't seem to help at all. I'm working on doing A/B testing at the moment. (It's tricky, as the site is based on a CMS - I custom coded the [Joomla] component, so hopefully I can get this testing working.)

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• Wheres my memory going?

  - by Stu2000

  My machine keeps 'freezing' before eventaully logging out with all the programs exiting. This is rather annoying, and I think its because I keep running out of memory. I am not running any custom software, just netbeans, chrome etc. (Stuff I usually run on other ubuntu computers without issue). For some reason my memory usage is through the roof as seen here, but I can't quite figure out why. Here is a screenshot which may be useful with htop and gnome-system monitor open as user and as root. I notice that my console-kit-daemon is taking up about a gig of 'virtual memory'. Is that normal? Any tips/advice will be helpful. In the meantime I have ordered 2 x 4 gig ram sticks to try and just throw hardware at the issue.

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• Is there a way of using HTTPS with Amazon's CloudFront CDN and CNAMEs?

  - by Metalshark

  We use Amazon's CloudFront CDN with custom CNAMEs hanging under the main domain (static1.example.com). Although we can break this uniform appearance and use the original whatever123wigglyw00.cloudfront.net URLs to utilise HTTPS, is there another way? Do Amazon or any other similar provider offer HTTPS CDN hosting? Is TLS and its selective encryption available for use somewhere (SNI: Server Name Indication)? Foot note: assuming that the answer is no, but just in the hope someone knows. EDIT: Now using Google App Engine https://developers.google.com/appengine/docs/ssl for CDN hosting with SSL support.

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• Software development, basics of design, conventions and scalability

  - by goce ribeski

  I need to improve my programming skills in order to achieve better scalability for the software I'm working on. Purpose is to learn the rules of adding new modules and features, so when it comes to maintaining existing ones there is some concept. So, I'm looking for a good book, tutorial or websites where I can continue to read about this. Currently, what I know and what I do is: to design relational database(3NF), make separate class for each table put that in MVC implement modular programming ...write code and hope for the best... I presume that next things I need to learn more deeply are: programming codex(naming, commenting, conventions...), organize functions building interfaces organizing custom made libraries, organizing API that I'm using, documenting, team work... ... At last what my job is, it does't need to affect your answer, PHP CodeIgniter developer.

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• How much should I charge for a web app

  - by Kostas

  I am a freelance web developer and I am working on a PHP/MySQL/Javascript based project. It's a web app that uses a custom CMS with user types, followers system, search forms, blogs, social integration. It will take about 3 months to finish, according to a roadmap I make (based on current development stage) and about a month after that for bug fixing and testing. So I have to tell them a price. What price range you think it's appropriate?? (It's a good regular client, so I want something reasonable) Can you give me some ideas?? Thanks.

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• Week in Geek: Windows 8 Start Button Will not be Coming Back

  - by Asian Angel

  Our first edition of WIG for April is filled with news links covering topics such as a U.S. based credit card processor for VISA and MasterCard has suffered a major breach, specs for a real Linux-powered Star Trek tricorder have been published, an FBI assistant director says that U.S. is not winning the war with hackers, and more. Original, unmodified clipart image courtesy of Open Clip Art Library. How to Own Your Own Website (Even If You Can’t Build One) Pt 1 What’s the Difference Between Sleep and Hibernate in Windows? Screenshot Tour: XBMC 11 Eden Rocks Improved iOS Support, AirPlay, and Even a Custom XBMC OS

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• Interfacing the payment systems

  - by etranger

  Hello all. I'm a complete newbie to using online payment systems for web projects, and can't really think of where to start. Let's assume that web system in question needs to generate some income online, and the business idea/functionality is in place, while organizing cash flow is the only unsolved problem. Points of interest are how the custom developed software interfaces to payment systems, and how the resulting income is available to the owner. I do understand that there are probably hundreds of systems out there, but to be more specific on which of them suit, I'd have to know how they work, and that's where I don't feel like understanding much. Thanks in advance.

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• Checking for DBNull

  - by Jim Lahman

  Using a table adapter to a SQL Server database table that returns a NULL record.  We determine the fields are NULL by comparing against System.DBNull Looking the NULL records in SQL Management studio   Using a table adapter to retrieve a record   1: try 2: { 3: this.vTrackingTableAdapter.FillByTrkZone(this.dsL1Write.vTracking, iTrkZone); 4: } 5: catch (Exception ex) 6: { 7: sLogMessage = String 8: .Format("Error getting coil number from tracking table at {0} - {1}", 9: sTrkName, 10: ex.Message); 11: throw new CannotReadTrackingTableException(sLogMessage); 12: }   Looking at the record as it returned from the table adapter:   ItemArrayObject Column [0] ChargeCoilNumber [1] HeadWeldZone [2] TailWeldZone [3] ZoneLen [4] ZoneCoilLen [5] Confirmed [6] Validated [7] EntryWidth [8] EntryThickness   Since each item in the ItemArray is an object, we can test for null   1: if (dsL1Write.vTracking.Rows[0].ItemArray[0] == System.DBNull.Value) 2: { 3: throw new NoCoilAtPORException("NULL coil found at tracking zone " + sTrkName); 4: }   If no records were returned by the table adapter 1: if (dsL1Write.vTracking.Rows.Count == 0) 2: { 3: throw new NoCoilAtPORException("No coils found at tracking zone " + sTrkName); 4: }

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• Should I just always Convert.ToInt32 my integers to account for potential nullable integers?

  - by Rowan Freeman

  If my MSSQL database contains a data type that is NULL (i.e. null is allowed) then ORMs, such as EntityFramework in my case, create .NET objects that are nullable. This is great, and the way I use nullables is like this: C# int? someInt = 5; int newInt = someInt.Value; // woot VB.NET Dim someInt As Integer? Dim newInt As Integer = someInt.Value ' hooray However, recently I had to make a change to the database to make an Id field no longer NULL (nullable). This means that .Value is now broken. This is a nuisance if the Id property is used a lot. One solution that I thought of is to just use Convert.ToInt32 on Id fields so it doesn't matter if an int is nullable or not. C# int newInt = Convert.ToInt32(someInt); // always compiles VB.NET Dim newInt As Integer = Convert.ToInt32(someInt) ' always compiles Is this a bad approach and are there any alternatives?

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• How are generics implemented?

  - by greenoldman

  This is the question from compiler internals perspective. I am interested in generics, not templates (C++), so I marked the question with C#. Not Java, because AFAIK the generics in both languages differ in implementations. When I look at languages w/o generics it is pretty straightforward, you can validate the class definition, add it to hierarchy and that's it. But what to do with generic class, and more importantly how handle references to it? How to make sure that static fields are singular per instantiations (i.e. each time generic parameters are resolved). Let's say I see a call: var x = new Foo<Bar>(); Do I add new Foo_Bar class to hierarchy? Update: So far I found only 2 relevant posts, however even they don't go into much details in sense "how to do it by yourself": http://www.jprl.com/Blog/archive/development/2007/Aug-31.html http://www.artima.com/intv/generics2.html

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• This Is a Completely Accurate Illustration of Me at My Last Job [Comic]

  - by The Geek

  Work is boring, what can I say? Usually I was up way too late every night, making the whole situation much worse. It got so bad that one of my co-workers took pictures for blackmail. =) Latest Features How-To Geek ETC How To Colorize Black and White Vintage Photographs in Photoshop How To Get SSH Command-Line Access to Windows 7 Using Cygwin The How-To Geek Video Guide to Using Windows 7 Speech Recognition How To Create Your Own Custom ASCII Art from Any Image How To Process Camera Raw Without Paying for Adobe Photoshop How Do You Block Annoying Text Message (SMS) Spam? Change Your MAC Address to Avoid Free Internet Restrictions Battlestar Galactica – Caprica Map of the 12 Colonies (Wallpaper Also Available) View Enlarged Versions of Thumbnail Images with Thumbnail Zoom for Firefox IntoNow Identifies Any TV Show by Sound Walk Score Calculates a Neighborhood’s Pedestrian Friendliness Factor Fantasy World at Twilight Wallpaper

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• Show line breaks in asp:label inside gridview

  - by Vipin

  To show line breaks in asp:label element or for that matter inside Gridview, do the following  in case of Mandatory/ Nullable fields. <ItemTemplate>          <%# ((string)Eval("Details")).Replace("\n", "<br/>") %>  </ItemTemplate>    <ItemTemplate>          <%# FormatString(Eval("Details"))  %>  </ItemTemplate>   In code behind, add the following FormatString function - protected string FormatString(string strHelpMessage) { string rtnString = string.Empty; if (!string.IsNullOrEmpty(strHelpMessage)) rtnString = strHelpMessage.Replace(Environment.NewLine, "<br/>"); return rtnString; }

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• Expected time for an CakePHP MVC form/controller and db make up

  - by hephestos

  I would like to know, what is an average time for building a form in MVC pattern with for example CakePHP. I build 8 functions, two of them do custom queries, return json data, split them, expand them in a model in memory and delivers to the view. Those are three queries if you consider and an array to feed view for making some combo box. Why? all these, because I have data from json and I split them in order to make row of data like a table. Like that I changed a bit the edit.ctp but not a lot. And I created a javascript outside, with three functions. One collects data the other upon a change of a combo returnes the selected values, and does also some redirection flow. All this, in average how much time should it take ?

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