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• Aren't there compilers better at telling the programmer what's wrong in a code ?

  - by jokoon

  I have worked a little while with the Microsoft compiler from Visual C++ but I worked a long time with G++, and I remember often having bad times understanding what was wrong in my code with the former. Beside binary code generation and optimisation, I think this is a very important feature of a C++ compiler: giving the programmer a clue that makes him understand as fast as possible what is wrong with his/her code. I can understand some programmers understand programming as some sort of "competition" to make less errors, but to me that's a counter productive opinion. I once tried Clang compiler for C from the LLVM thingie, I didn't use it for a long time, but I was impressed on how explicit and easy to understand the error messages were. What are your experiences, and how do you think this matters ? Some WIP of C++ Clang: http://clang.llvm.org/cxx_status.html

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• How to adjust TouchPad edge scroll area in Ubuntu?

  - by MikeVB

  I have an Acer Aspire that I have dual booting XP and Ubuntu. On the Windows side, the driver allows you to set how close your finger has to be to the edge of the TouchPad before it goes into scroll mode. In Ubuntu I don't have the option (at least in the GUI) to change the scroll area on the pad. Is there a conf file or other way to change this? I'm constantly getting into the scroll area during normal usage. I would like to leave it on without losing so much pad area to the scroll feature.

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• Upgrading to Code Based Migrations EF 4.3.1 with Connector/Net 6.6

  - by GABMARTINEZ

  Entity Framework 4.3.1 includes a new feature called code first migrations.  We are adding support for this feature in our upcoming 6.6 release of Connector/Net.  In this walk-through we'll see the workflow of code-based migrations when you have an existing application and you would like to upgrade to this EF 4.3.1 version and use this approach, so you can keep track of the changes that you do to your database.   The first thing we need to do is add the new Entity Framework 4.3.1 package to our application. This should via the NuGet package manager.  You can read more about why EF is not part of the .NET framework here. Adding EF 4.3.1 to our existing application  Inside VS 2010 go to Tools -> Library Package Manager -> Package Manager Console, this will open the Power Shell Host Window where we can work with all the EF commands. In order to install this library to your existing application you should type Install-Package EntityFramework This will make some changes to your application. So Let's check them. In your .config file you'll see a  <configSections> which contains the version you have from EntityFramework and also was added the <entityFramework> section as shown below. This section is by default configured to use SQL Express which won't be necesary for this case. So you can comment it out or leave it empty. Also please make sure you're using the Connector/Net 6.6.x version which is the one that has this support as is shown in the previous image. At this point we face one issue; in order to be able to work with Migrations we need the __MigrationHistory table that we don't have yet since our Database was created with an older version. This table is used to keep track of the changes in our model. So we need to get it in our existing Database. Getting a Migration-History table into an existing database First thing we need to do to enable migrations in our existing application is to create our configuration class which will set up the MySqlClient Provider as our SQL Generator. So we have to add it with the following code: using System.Data.Entity.Migrations;     //add this at the top of your cs file public class Configuration : DbMigrationsConfiguration<NameOfYourDbContext>  //Make sure to use the name of your existing DBContext { public Configuration() { this.AutomaticMigrationsEnabled = false; //Set Automatic migrations to false since we'll be applying the migrations manually for this case. SetSqlGenerator("MySql.Data.MySqlClient", new MySql.Data.Entity.MySqlMigrationSqlGenerator());     }   }  This code will set up our configuration that we'll be using when executing all the migrations for our application. Once we have done this we can Build our application so we can check that everything is fine. Creating our Initial Migration Now let's add our Initial Migration. In Package Manager Console, execute "add-migration InitialCreate", you can use any other name but I like to set this as our initial create for future reference. After we run this command, some changes were done in our application: A new Migrations Folder was created. A new class migration call InitialCreate which in most of the cases should have empty Up and Down methods as long as your database is up to date with your Model. Since all your entities already exists, delete all duplicated code to create any entity which exists already in your Database if there is any. I found this easier when you don't have any pending updates to do to your database. Now we have our empty migration that will make no changes in our database and represents how are all the things at the begining of our migrations.  Finally, let's create our MigrationsHistory table. Optionally you can add SQL code to delete the edmdata table which is not needed anymore. public override void Up() { // Just make sure that you used 4.1 or later version         Sql("DROP TABLE EdmMetadata"); } From our Package Manager Console let's type: Update-database; If you like to see the operations made on each Update-database command you can use the flag -verbose after the Update-database. This will make two important changes.  It will execute the Up method in the initial migration which has no changes in the database. And second, and very important,  it will create the __MigrationHistory table necessary to keep track of your changes. And next time you make a change to your database it will compare the current model to the one stored in the Model Column of this table. Conclusion The important thing of this walk through is that we must create our initial migration before we start doing any changes to our model. This way we'll be adding the necessary __MigrationsHistory table to our existing database, so we can keep our database up to date with all the changes we do in our context model using migrations. Hope you have found this information useful. Please let us know if you have any questions or comments, also please check our forums here where we keep answering questions in general for the community.  Happy MySQL/Net Coding!

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• JavaOne Kicks Off with Sunday Keynotes

  - by Yolande Poirier

  The Java Strategy, Partner, and Technical keynotes will be held on Sunday, September 22, beginning at 4:00 p.m. like last year, to free up time for session slots on Monday and Tuesday. The keynotes will again take place at the historic Masonic Auditorium on Nob Hill. That same evening at 7:00 p.m., attendees are invited to the official JavaOne Welcome Reception at the Taylor Street Café @ the Zone. Sunday will also feature User Group meetings (at Moscone West) and Java University courses (Hilton San Francisco Union Square). On Thursday, the Java Community keynote will start the wrap up of the conference. Register before July 19, 2013 and save US$400. Click here for information on registration packages, including the low-cost Discover pass alternative.

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• Wordpress Queue like Tumblr?

  - by Michael Hopkins

  Hi. Is there a way to give Wordpress the queue functionality that Tumblr has? Tumblr's queue, for those who don't know, is a way to space posts out without assigning specific post dates. For example, a Tumblr queue might be set to post every four hours between 9am and 5pm. Tumblr would drop the front post in the queue at 9am, 1pm and 5pm every day. Posts are added to the queue by clicking "add to queue" instead of "publish." It's quite simple. How can this feature be added to Wordpress?

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• About plagiarism

  - by user20018

  Hi I don't know if it is appropriate to ask this question here. The moderator can delete this question after getting answered if he finds this question as inappropriate in this forum I'm performing a project course work in my computer science department. For example I don't know how to develop logic for some requirements in my project and I find the code in some tutorial. If i implement the feature along the same lines mentioned in that tutorial. Does it constitute academic plagiarism ?? Thank you in anticipation.

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• Get Ready For C# 4.0!

  Visual Studio 2010 is here! And of course this means that C# 4.0 is also here. Lets do a quick review of the new language features added in this release. Dynamic The dynamic keyword is a key feature of this release. It closes the gap between dynamic and statically-typed languages. Now you can create dynamic objects and let their types be determined at run time. With the addition of the System.Dynamic namespace, you can create expandable objects and advanced class wrappers, and you can provide interoperability...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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• Should your client be able to view your project management board?

  - by bizso09

  We're making a bespoke software for our client and use Codebase for our project management. Is it a good idea to let our client view our project management board? The advantages that we thought of are that this would enhance the cooperation between the client and the dev team, following agile practices. He would essentially become part of our team. It would also reduce communication overhead and make sure we're on the same page. The client could track the progression of the system and make suggestions along the way on the user stories. In addition, he could submit bugs or feature requests. The disadvantages that we though of are that some aspects of the board might be too technical to the client. He would suggest changes to the user stories too often and he might view some content that we normally wouldn't want our client to see. For example, when we compromise on technology or functionality, the client might question that and insist on doing things one way or the other.

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• Blogger Template: How is inline style tag getting attached to img? [migrated]

  - by john Smith

  Examining a blogger template's img tag (data:post.thumbnailUrl) i've approached a mystery. An inline style tag controlling the width, margin and heigh perimeters are getting added to my img element. They are auto adjusting the images ratio to fit a smaller size. But I can't figure-out where this style tag script lives and how it's happening in my template. My template has no special javascript or jquery scripts. The full size images in the single posts page don't have this style tag. Is this a css or xml feature? element.style { margin-top: 0px; width: 301.0033444816054px; height: 200px; margin-left: -0.5016722408026908px; }

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• How a Hard Drive Works in Slow Motion [Video]

  - by Asian Angel

  This short video lets you have a good luck at a hard drive in slow motion as the actuator arm moves across the disk and then water is added to the equation as well… How a Hard Drive works in Slow Motion – The Slow Mo Guys [via BoingBoing] HTG Explains: What Is Two-Factor Authentication and Should I Be Using It? HTG Explains: What Is Windows RT and What Does It Mean To Me? HTG Explains: How Windows 8′s Secure Boot Feature Works & What It Means for Linux

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• Icon zoom on gnome panel with mouseover?

  - by brent.with.a.mustache

  I'm actually quite surprised that I couldn't find any information regarding this question through simple google-ing; I would think that it was something of a no-brainer kind of question. I'm basically trying to figure out if there's any way to have the icons in the side panel/favorites bar magnify as you mouseover them, much like you'd see in any the popular launcher programs (i.e. rocket dock or apple's launcher)? I'm on a netbook with a rather limited amount of screen real estate to work with, so the icons depicting my "favorite applications" have been reduced to a permanent, unsatisfying handful of pixels. Again, it seems to me that this should be a fairly obvious feature to include in the options for the panel, so I'm hoping that there's an easy solution. Unfortunately, I haven't found any way to make this happen, so any help would be appreciated. Here's a screenshot :squint: http://i.imgur.com/OpMIF.jpg -- ubuntu 11.10; gnome 3; hp mini 110

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• The performance implications of IEnumerable vs. IQueryable

  It all started innocently enough. I was implementing a "Older Posts/Newer Posts" feature for my new web site and was writing code like this:IEnumerable<Post> FilterByCategory(IEnumerable<Post> posts, string category) {  if( !string.IsNullOrEmpty(category) ) { return posts.Where(p => p.Category.Contains(category)); }}...  var posts = FilterByCategory(db.Posts, category);  int count = posts.Count();... The "db" was an EF object context object, but it could just as...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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• The performance implications of IEnumerable vs. IQueryable

  It all started innocently enough. I was implementing a "Older Posts/Newer Posts" feature for my new web site and was writing code like this:IEnumerable<Post> FilterByCategory(IEnumerable<Post> posts, string category) {  if( !string.IsNullOrEmpty(category) ) { return posts.Where(p => p.Category.Contains(category)); }}...  var posts = FilterByCategory(db.Posts, category);  int count = posts.Count();... The "db" was an EF object context object, but it could just as...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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• MIX10 Windows Phone 7 Content Overview

  The tools available at MIX 10 and for public download are a Community Technology Preview, while not feature complete, the tools release at MIX 10 ships with a robust set of functionality. The white papers provide guidance on architecture, development, as well as design. In addition there are code samples and hands-on-labs that cover key topics such as Silverlight, the application bar, splash screen, navigation model, and XNA Game Studio. Training available now: Charles Petzolds preview of Programming...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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• Which purpose do armor points serve?

  - by Bane

  I have seen a mechanic which I call "armor points" in many games: Quake, Counter Strike, etc. Generally, while the player has these armor points, he takes less damage. However, they act in a similar fashion that health points do: you lose them by taking said damage. Why would you design such a feature? Is this just health 2.0, or am I missing something? To me, armor only makes sense in, for example, RPG games, where it is a constant that determines your resistance. But I don't see why would it need to be reduceable during combat.

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• How to Create Effective Error Reports

  - by John Paul Cook

  This post demonstrates some generic problem reporting steps that I encourage all users, whether developers or nontechnical end users, to follow. SQL Server has a feature that can help. So does Windows in some cases. More on those in Step 3. Step 1: Is the problem caused by a particular action undertaken on a gui? If so, you should get a screen capture. But if it is caused by executing some T-SQL code in a query window, just copy/paste the offending code as text. There are several ways to get a screen...(read more)

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• How to migrate from Banshee to Rhythmbox?

  - by rafalcieslak

  As it has been decided, Ubuntu Precise 12.04 will feature Rhythmbox as the default music player. I am aware, that it does not mean that I will not be able to use Banshee, nevertheless I would like to switch to it. I have been a Rhythmbox fan for a long time, but after the switch to Banshee in Natty I decided to give it a try and completely migrated to it. However, I am not very happy with it, it lags for me a lot and has some other issues. I would like to export all Banshee data to Rhythmbox. That includes: Music library Playlists Preferably playcounts and ratings Radio stations Cover pictures What should I do to move all this data to Rhythmbox, get it to work as the default music player, and smoothly switch completely to it?

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• HTG Explains: How System Restore Works in Windows

  - by Chris Hoffman

  System Restore is a Windows feature that can help fix some crashes and other computer problems. To know when to use it, you’ll have to understand just how System Restore works. System Restore can’t solve every problem – for example, you can’t use it to restore your personal files if they’re accidentally deleted or modified. However, it’s another tool you can use when your computer isn’t working properly. HTG Explains: How Antivirus Software Works HTG Explains: Why Deleted Files Can Be Recovered and How You Can Prevent It HTG Explains: What Are the Sys Rq, Scroll Lock, and Pause/Break Keys on My Keyboard?

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• New Development Snapshot

  More fixes. Thanks to Kornl Pl for his patches, bug reports and work on porting gmcs to IKVM.Reflection. Changes: Removed mcs specific flag that is no longer required. Removed use of reflection for getting the slot of a java.lang.reflect.Field. Implemented RuntimeMXBean. Feature request #2994310. Implemented OperatingSystemMXBean. Added ikvmc option to disable automagic serialization. Fixed ikvmc to give a proper...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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• Using branches for a mini project or module of project: Good practice?

  - by TheLQ

  In my repo I have 3 closely related mini projects: 1 server and 2 clients. They are all quite small (<3 files each). Since they are so small and so closely related I just dropped them in folders in one single repo. However now that I know I can't clone a single directory in my VCS of choice (Mercurial), I'm considering splitting them up. However I'm confused about general best practice: Is it okay to put different small projects in different branches, or should they all go in different repos? I'm currently leaning towards branching since I can't easily splice out the file history of the different projects but then your using a feature in a way it wasn't meant to be used.

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• Adjust Terminal - (Arch-like Info-Screen)

  - by Daniel

  I use Ubuntu for many years but recently I discovered a nice feature in Arch. It is common to display system-information on headless servers on ssh-login, on Ubuntu its the landscape- package. I wounded if it's possible to create the same for the normal terminal in Ubuntu . Like the terminal in Arch I think it might be useful to have this information displayed, at the time one starts the terminal. Is it possible to create something like this for the terminal, and if so what would you suggest? I tried motd but these messages were not displayed. Daniel

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• How to crawl a webPage with dynamic content added by javascript

  - by blunderboy

  I guess there is a news that Google bots have the capability to understand our javascript code. It means this is possible to fully crawl a webpage which has lazy loading feature enabled. I am using Apache Nutch to crawl websites but I don't think it has the capability to fetch the URLs being injected in HTML page by javascript when the page is scrolled down. I see a lot of websites doing lazy loading for performance issue. So Can somebody please explain me how can i crawl the data which comes in HTML page on lazy load. (On scrolling the page down).

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• Look after your tribe of Pygmies with Java ME technology

  - by hinkmond

  Here's a game that is crossing over from the iDrone to the more lucrative Java ME cell phone market. See: Pocket God on Java ME Here's a quote: Massive casual iPhone hit Pocket God has parted the format waves and walked over to the land of Java mobiles, courtesy of AMA. The game sees you take control of an omnipotent, omnipresent, and (possibly) naughty deity, looking after your tribe of Pygmies... Everyone knows that there are more Java ME feature phones than grains of sand on a Pocket God island beach. So, when iDrone games are done piddlying around on a lesser platform, they move over to Java ME where things are really happening. Hinkmond

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• Code review process when using GIT as a repository?

  - by Sid

  What is the best process for code review when using GIT? Current process: We have a GIT server with a master branch to which everyone commits Devs work off the local master mirror or a local feature branch Devs commit to server's master branch Devs request code review on last commit Problem: Any bug in code review are already in master by the time it's caught. Worse, usually someone has burnt a few hours trying to figure out what happened... So, we would like To do code review BEFORE delivery into the 'master'. Have a process that works with a global team (no over the shoulder reviews!) something that doesn't require an individual dev to be at his desk/machine to be powered up so someone else can remote in (remove human dependency, devs go home at different timezones) We use TortoiseGIT for a visual representation of a list of files changed, diff'ing files etc. Some of us drop into a GIT shell when the GUI isn't enough, but ideally we'd like the workflow to be simple and GUI based (I want the tool to lift any burden, not my devs).

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• User eXperience

  - by Daniel Moth

  The last few months I have been spending a lot of time designing (and help design) the developer experience for the areas I contribute to (in future versions of Visual Studio). As a technical person who defines feature sets, it is easy to get engulfed in the pure technical side of things and ignore the details that ultimately make users "love" using the product to achieve their goal, instead of just "having to use" it. Engaging in UX design helps me escape that trap. In case you are also interested in the UX side of development, I thought I'd share an interesting site I came across: UX myths. In particular, I recommend reading myths 9, 10, 12, 13, 14, 15 and 21. Let me know if there are other UX resources you recommend… Comments about this post welcome at the original blog.

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