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• Should a c# dev switch to VB.net when the team language base is mixed?

  - by jjr2527

  I recently joined a new development team where the language preferences are mixed on the .net platform. Dev 1: Knows VB.net, does not know c# Dev 2: Knows VB.net, does not know c# Dev 3: Knows c# and VB.net, prefers c# Dev 4: Knows c# and VB6(VB.net should be pretty easy to pick up), prefers c# It seems to me that the thought leaders in the .net space are c# devs almost universally. I also thought that some 3rd party tools didn't support VB.net but when I started looking into it I didn't find any good examples. I would prefer to get the whole team on c# but if there isn't any good reason to force the issue aside from preference then I don't think that is the right choice. Are there any reasons I should lead folks away from VB.net?

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• Crashplan not starting. Fails to find swt-gtk

  - by Pibben

  I've installed Crashplan on my (K)Ubuntu computer. However, it fails to start and the ui_output.log says: [09.02.12 15:24:43.518 INFO main root ] ************************************************************* [09.02.12 15:24:43.519 INFO main root ] ************************************************************* [09.02.12 15:24:43.524 INFO main root ] Loading lib/swt-64.jar, exists=true [09.02.12 15:24:43.525 INFO main root ] [file:/usr/local/crashplan/lib/com.backup42.desktop.jar, file:/usr/local/crashplan/lang/, file:/usr/local/crashplan/skin/, file:/usr/local/crashplan/lib/swt-64.jar] [09.02.12 15:24:43.527 INFO main root ] STARTED CrashPlanDesktop [09.02.12 15:24:43.528 INFO main root ] CPVERSION = 3.2.1 - 1332824401321 (2012-03-27T05:00:01:321+0000) [09.02.12 15:24:43.529 INFO main root ] ARGS = [ ] [09.02.12 15:24:43.531 INFO main root ] LOCALE = English (United States) [09.02.12 15:24:43.570 ERROR main com.backup42.desktop.CPDesktop ] Failed to launch CPDesktop; java.lang.UnsatisfiedLinkError: no swt-gtk-3557 or swt-gtk in swt.library.path, java.library.path or the jar file, java.lang.UnsatisfiedLinkError: no swt-gtk-3557 or swt-gtk in swt.library.path, java.library.path or the jar file java.lang.UnsatisfiedLinkError: no swt-gtk-3557 or swt-gtk in swt.library.path, java.library.path or the jar file at org.eclipse.swt.internal.Library.loadLibrary(Unknown Source) at org.eclipse.swt.internal.Library.loadLibrary(Unknown Source) at org.eclipse.swt.internal.C.<clinit>(Unknown Source) at org.eclipse.swt.internal.Converter.wcsToMbcs(Unknown Source) at org.eclipse.swt.internal.Converter.wcsToMbcs(Unknown Source) at org.eclipse.swt.widgets.Display.<clinit>(Unknown Source) at com.backup42.desktop.CPDesktop.<init>(CPDesktop.java:231) at com.backup42.desktop.CPDesktop.main(CPDesktop.java:161) [09.02.12 15:24:43.570 ERROR main root ] Failed to launch CPDesktop; java.lang.UnsatisfiedLinkError: no swt-gtk-3557 or swt-gtk in swt.library.path, java.library.path or the jar file I've installed the relevant (I think) swt-gtk packages.

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• Should a c# dev switch to VB.net when the team language base is mixed?

  - by jjr2527

  I recently joined a new development team where the language preferences are mixed on the .net platform. Dev 1: Knows VB.net, does not know c# Dev 2: Knows VB.net, does not know c# Dev 3: Knows c# and VB.net, prefers c# Dev 4: Knows c# and VB6(VB.net should be pretty easy to pick up), prefers c# It seems to me that the thought leaders in the .net space are c# devs almost universally. I also thought that some 3rd party tools didn't support VB.net but when I started looking into it I didn't find any good examples. I would prefer to get the whole team on c# but if there isn't any good reason to force the issue aside from preference then I don't think that is the right choice. Are there any reasons I should lead folks away from VB.net?

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• Adding Attributes to Generated Classes

  ASP.NET MVC 2 adds support for data annotations, implemented via attributes on your model classes.  Depending on your design, you may be using an OR/M tool like Entity Framework or LINQ-to-SQL to generate your entity classes, and you may further be using these entities directly as your Model.  This is fairly common, and alleviates the need to do mapping between POCO domain objects and such entities (though there are certainly pros and cons to using such entities directly). As an example, the current version of the NerdDinner application (available on CodePlex at nerddinner.codeplex.com) uses Entity Framework for its model.  Thus, there is a NerdDinner.edmx file in the project, and a generated NerdDinner.Models.Dinner class.  Fortunately, these generated classes are marked as partial, so you can extend their behavior via your own partial class in a separate file.  However, if for instance the generated Dinner class has a property Title of type string, you cant then add your own Title of type string for the purpose of adding data annotations to it, like this: public partial class Dinner { [Required] public string Title { get;set; } } This will result in a compilation error, because the generated Dinner class already contains a definition of Title.  How then can we add attributes to this generated code?  Do we need to go into the T4 template and add a special case that says if were generated a Dinner class and it has a Title property, add this attribute?  Ick. MetadataType to the Rescue The MetadataType attribute can be used to define a type which contains attributes (metadata) for a given class.  It is applied to the class you want to add metadata to (Dinner), and it refers to a totally separate class to which youre free to add whatever methods and properties you like.  Using this attribute, our partial Dinner class might look like this: [MetadataType(typeof(Dinner_Validation))] public partial class Dinner {}   public class Dinner_Validation { [Required] public string Title { get; set; } } In this case the Dinner_Validation class is public, but if you were concerned about muddying your API with such classes, it could instead have been created as a private class within Dinner.  Having the validation attributes specified in their own class (with no other responsibilities) complies with the Single Responsibility Principle and makes it easy for you to test that the validation rules you expect are in place via these annotations/attributes. Thanks to Julie Lerman for her help with this.  Right after she showed me how to do this, I realized it was also already being done in the project I was working on. 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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• WPF and Composite Application Library &ndash; Missing The Point

  - by David Totzke

  I have a headache and it’s not even 9AM yet.  Well, ok, it’s nearly ten here now in GMT –5 but it’s before nine somewhere still. Sometimes people will miss the point of something so utterly and completely that one is left wondering how such a person can even dress themselves. Writing an application using WPF and the Composite Application Library (Prism) means that one must learn the various programming idioms common to these frameworks.  The Windows Forms event driven model simply will not suffice.  You need to come to grips with the idea of a very loosely coupled application.  Concepts that must be absorbed and internalized include Data Binding, Control and Data Templates, Commands, Dependency Injection, and Inversion of Control, as well as the Supervising Controller, Presentation Model and Model-View-View-Model patterns. It is as simple as that.  Not to embrace these concepts is to invite pain.  It is to invite noodles; and not the holy kind. Someone actually said to me that “just because it’s not WPF, doesn’t mean it’s wrong.”  And he’s right.  Unless, of course, you are writing a WPF application and especially if you are using the Composite Application Library. In simple terms then; YOU’RE DOING IT WRONG!   Dave Just because I can…

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• In WPF, should I base my converters on types or use-cases?

  - by user1013159

  I'm looking for some advice on how to write my WPF value converters. The way I'm currently writing them, they are very specific, like (bool?,bool) = Brush, i.e. I'm writing each converter for a specific use case, in this case, the Brush is bound to an indicator showing equality information between the bool? and the bool. This obviously makes re-use very hard and I end up with a quite large list of converters. Should I strive to write my converters in a more general way? Can I?

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• Creating Custom validation rule and register it

  - by FormsEleven

  What is Validation Rule? A validation rule is a piece of code that performs some check ensuring that data meets given constraints.In an enterprise application development environment, often it might require developers to have validation be performed based on some logic at several places across projects. Instead of redundant validation creation, a custom validation rule provides a library with a validation rules that can be registered and used across applications.A custom Validation is encapsulated in a reusable component so that you do not have to write it every time when you need to do input validation. Here is how we can easily implement a custom validation that checks for name of an employee to be "KING" For creating a custom Validation , 1.         Create Generic Application Workspace "CustomValidator" with the project "Model" 2.         Create an BC4J based on emp table. 3.         Create a custom validation rule.In EmpNamerule class, update the validateValue(..) method as follows:  public boolean validateValue(Object value) { EntityImpl emp = (EntityImpl)value; if(emp.getAttribute("Ename").toString().equals("KING")){ return false; } return true; } Create ADF Library: Next step would be to create ADF library. Create ADF library with name lets say testADFLibrary1.jarRegister ADF Library Next step is to register the ADF library , so that its available across the applications. Invoke the menu "Tools -> Preferences"Select the option "Business Components -> Registered Rules" from left paneClick on button "Pick Library". The dialog "Select Library" comes up with  the user library addedAdd new library' that points to the above jarCheck the checkbox "Register" and set the name for the rule Sample UsageHere is how we can easily implement a validation rule that restrict the name of the employee not to be "KING".Create new Application with BC4J based on EMP table.Create new validation under Business rule tab for Ename & select the above custom validation rule.Run the AppModule tester.

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• Should one generally develop a client library for REST services to help prevent API breakages?

  - by BestPractices

  We have a project where UI code will be developed by the same team but in a different language (Python/Django) from the services layer (REST/Java). The code for each layer exits in different code repositories and which can follow different release cycles. I'm trying to come up with a process that will prevent/reduce breaking changes in the services layer from the perspective of the UI layer. I've thought to write integration tests at the UI layer level that we'll run whenever we build the UI or the services layer (we're using Jenkins as our CI tool to build the code which is in two Git repos) and if there are failures then something in the services layer broke and the commit is not accepted. Would it also be a good idea (is it a best practice?) to have the developer of the services layer create and maintain a client library for the REST service that exists in the UI layer that they will update whenever there is a breaking change in their Service API? Conceivably, we would then have the advantage of a statically-typed API that the UI code builds against. If the client library API changes, then the UI code won't compile (so we'll know sooner that there was a breaking change). I'd also still run the integration tests upon building the UI or services layer to further validate that the integration between UI and the service(s) still works.

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• CSS specificity: Why isn't CSS specificity weight of 10 or more class selectors greater than 1 id selector? [migrated]

  - by ajc

  While going through the css specificity concept, I understood the fact that it is calculated as a 4 parts 1) inline (1000) 2) id (100) 3) class (10) 4) html elments (1) CSS with the highest rule will be applied to the corresponding element. I tried the following example Created more than 10 classes <div class="a1"> .... <div class="a13" id="id1"> TEXT COLOR </div> ... </div> and the css as .a1 .a2 .a3 .a4 .a5 .a6 .a7 .a8 .a9 .a10 .a11 .a12 .a13 { color : red; } #id1 { color: blue; } Now, even though in this case there are 13 classes the weight is 130. Which is greater than the id. Result - JSFiddle CSS specificity

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• Why don't C++ Game Developers use the boost library?

  - by James

  So if you spend any time viewing / answering questions over on Stack Overflow under the C++ tag, you will quickly notice that just about everybody uses the boost library; some would even say that if you aren't using it, you're not writing "real' C++ (I disagree, but that's not the point). But then there is the game industry, which is well known for using C++ and not using boost. I can't help but wonder why that is. I don't care to use boost because I write games (now) as a hobby, and part of that hobby is implementing what I need when I am able to and using off-the-shelf libraries when I can't. But that is just me. Why don't game developers, in general, use the boost library? Is it performance or memory concerns? Style? Something Else? I was about to ask this on stack overflow, but I figured the question is better asked here. EDIT : I realize I can't speak for all game programmers and I haven't seen all game projects, so I can't say game developers never use boost; this is simply my experience. Allow me to edit my question to also ask, if you do use boost, why did you choose to use it?

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• How to add another OS entry in Wubi grub

  - by Amey Jah

  I am trying to install another linux distro besides ubuntu. However, I want to retain my existing windows based loader. Currently, as per my knowledge, MsDos loads grub which then loads Ubuntu (with loop back trick). Now, I have a new linux distro installed on /dev/sda8 (/boot for new distro) where as /root for that OS is installed on /dev/sda9. I tried following steps 1. Add entry into 40_custom of ubuntu grub 2. update grub But upon booting via that entry, it is not able to load the new OS and shows me blank screen. What could be the problem? Additional data: grub.cfg file of ubuntu menuentry 'Ubuntu' --class ubuntu --class gnu-linux --class gnu --class os $menuentry_id_option 'gnulinux-simple-fc296be2-8c59-4f21-a3f8-47c38cd0d537' { gfxmode $linux_gfx_mode insmod gzio insmod ntfs set root='hd0,msdos5' if [ x$feature_platform_search_hint = xy ]; then search --no-floppy --fs-uuid --set=root --hint-bios=hd0,msdos5 --hint-efi=hd0,msdos5 --hint-baremetal=ahci0,msdos5 01CD7BB998DB0870 else search --no-floppy --fs-uuid --set=root 01CD7BB998DB0870 fi loopback loop0 /ubuntu/disks/root.disk set root=(loop0) linux /boot/vmlinuz-3.5.0-19-generic root=UUID=01CD7BB998DB0870 loop=/ubuntu/disks/root.disk ro quiet splash $vt_handoff initrd /boot/initrd.img-3.5.0-19-generic } submenu 'Advanced options for Ubuntu' $menuentry_id_option 'gnulinux-advanced-fc296be2-8c59-4f21-a3f8-47c38cd0d537' { menuentry 'Ubuntu, with Linux 3.5.0-19-generic' --class ubuntu --class gnu-linux --class gnu --class os $menuentry_id_option 'gnulinux-3.5.0-19-generic-advanced-fc296be2-8c59-4f21-a3f8-47c38cd0d537' { gfxmode $linux_gfx_mode insmod gzio insmod ntfs set root='hd0,msdos5' if [ x$feature_platform_search_hint = xy ]; then search --no-floppy --fs-uuid --set=root --hint-bios=hd0,msdos5 --hint-efi=hd0,msdos5 --hint-baremetal=ahci0,msdos5 01CD7BB998DB0870 else search --no-floppy --fs-uuid --set=root 01CD7BB998DB0870 fi loopback loop0 /ubuntu/disks/root.disk set root=(loop0) echo 'Loading Linux 3.5.0-19-generic ...' linux /boot/vmlinuz-3.5.0-19-generic root=UUID=01CD7BB998DB0870 loop=/ubuntu/disks/root.disk ro quiet splash $vt_handoff echo 'Loading initial ramdisk ...' initrd /boot/initrd.img-3.5.0-19-generic } menuentry 'Ubuntu, with Linux 3.5.0-19-generic (recovery mode)' --class ubuntu --class gnu-linux --class gnu --class os $menuentry_id_option 'gnulinux-3.5.0-19-generic-recovery-fc296be2-8c59-4f21-a3f8-47c38cd0d537' { insmod gzio insmod ntfs set root='hd0,msdos5' if [ x$feature_platform_search_hint = xy ]; then search --no-floppy --fs-uuid --set=root --hint-bios=hd0,msdos5 --hint-efi=hd0,msdos5 --hint-baremetal=ahci0,msdos5 01CD7BB998DB0870 else search --no-floppy --fs-uuid --set=root 01CD7BB998DB0870 fi loopback loop0 /ubuntu/disks/root.disk set root=(loop0) echo 'Loading Linux 3.5.0-19-generic ...' linux /boot/vmlinuz-3.5.0-19-generic root=UUID=01CD7BB998DB0870 loop=/ubuntu/disks/root.disk ro recovery nomodeset echo 'Loading initial ramdisk ...' initrd /boot/initrd.img-3.5.0-19-generic } } ### END /etc/grub.d/10_lupin ### menuentry 'Linux, with Linux core repo kernel' --class arch --class gnu-linux --class gnu --class os $menuentry_id_option 'gnulinux-core repo kernel-true-0f490b6c-e92d-42f0-88e1-0bd3c0d27641'{ load_video set gfxpayload=keep insmod gzio insmod part_msdos insmod ext2 set root='hd0,msdos8' if [ x$feature_platform_search_hint = xy ]; then search --no-floppy --fs-uuid --set=root --hint-bios=hd0,msdos8 --hint-efi=hd0,msdos8 --hint-baremetal=ahci0,msdos8 0f490b6c-e92d-42f0-88e1-0bd3c0d27641 else search --no-floppy --fs-uuid --set=root 0f490b6c-e92d-42f0-88e1-0bd3c0d27641 fi echo 'Loading Linux core repo kernel ...' linux /boot/vmlinuz-linux root=UUID=0f490b6c-e92d-42f0-88e1-0bd3c0d27641 ro quiet echo 'Loading initial ramdisk ...' initrd /boot/initramfs-linux.img } menuentry 'Linux, with Linux core repo kernel (Fallback initramfs)' --class arch --class gnu-linux --class gnu --class os $menuentry_id_option 'gnulinux-core repo kernel-fallback-0f490b6c-e92d-42f0-88e1-0bd3c0d27641' { load_video set gfxpayload=keep insmod gzio insmod part_msdos insmod ext2 set root='hd0,msdos8' if [ x$feature_platform_search_hint = xy ]; then search --no-floppy --fs-uuid --set=root --hint-bios=hd0,msdos8 --hint-efi=hd0,msdos8 --hint-baremetal=ahci0,msdos8 0f490b6c-e92d-42f0-88e1-0bd3c0d27641 else search --no-floppy --fs-uuid --set=root 0f490b6c-e92d-42f0-88e1-0bd3c0d27641 fi echo 'Loading Linux core repo kernel ...' linux /boot/vmlinuz-linux root=UUID=0f490b6c-e92d-42f0-88e1-0bd3c0d27641 ro quiet echo 'Loading initial ramdisk ...' initrd /boot/initramfs-linux-fallback.img } lsblk NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINT sda 8:0 0 931.5G 0 disk +-sda1 8:1 0 39.2M 0 part +-sda2 8:2 0 19.8G 0 part +-sda3 8:3 0 205.1G 0 part +-sda4 8:4 0 1K 0 part +-sda5 8:5 0 333.7G 0 part /host +-sda6 8:6 0 233.4G 0 part +-sda7 8:7 0 100.4G 0 part +-sda8 8:8 0 100M 0 part +-sda9 8:9 0 14.7G 0 part +-sda10 8:10 0 21.4G 0 part +-sda11 8:11 0 3G 0 part sr0 11:0 1 1024M 0 rom loop0 7:0 0 29G 0 loop / blkid /dev/loop0: UUID="fc296be2-8c59-4f21-a3f8-47c38cd0d537" TYPE="ext4" /dev/sda1: SEC_TYPE="msdos" LABEL="DellUtility" UUID="5450-4444" TYPE="vfat" /dev/sda2: LABEL="RECOVERY" UUID="78C4FAC1C4FA80A4" TYPE="ntfs" /dev/sda3: LABEL="OS" UUID="DACEFCF1CEFCC6B3" TYPE="ntfs" /dev/sda5: UUID="01CD7BB998DB0870" TYPE="ntfs" /dev/sda6: UUID="01CD7BB99CA3F750" TYPE="ntfs" /dev/sda7: LABEL="Windows 8" UUID="01CDBFB52F925F40" TYPE="ntfs" /dev/sda8: UUID="cdbb5770-d29c-401d-850d-ee30a048ca5e" TYPE="ext2" /dev/sda9: UUID="0f490b6c-e92d-42f0-88e1-0bd3c0d27641" TYPE="ext2" /dev/sda10: UUID="2e7682e5-8917-4edc-9bf9-044fea2ad738" TYPE="ext2" /dev/sda11: UUID="6081da70-d622-42b9-b489-309f922b284e" TYPE="swap Any help is appreciated. Please let me know if you need any extra data.

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• How can a collection class instantiate many objects with one database call?

  - by Buttle Butkus

  I have a baseClass where I do not want public setters. I have a load($id) method that will retrieve the data for that object from the db. I have been using static class methods like getBy($property,$values) to return multiple class objects using a single database call. But some people say that static methods are not OOP. So now I'm trying to create a baseClassCollection that can do the same thing. But it can't, because it cannot access protected setters. I don't want everyone to be able to set the object's data. But it seems that it is an all-or-nothing proposition. I cannot give just the collection class access to the setters. I've seen a solution using debug_backtrace() but that seems inelegant. I'm moving toward just making the setters public. Are there any other solutions? Or should I even be looking for other solutions?

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• Une startup californienne annonce avoir battu le Captcha, grâce à un algorithme basé sur un réseau de neurones artificiel multicouche

  Vicarious, une startup Californienne vient d'annoncer avoir battu le fameux test de Captcha.Qui utilise internet et n'a jamais eu à affronter ce test ? Réponse : personne ! Captcha est ce fameux test que vous devez passer lorsque vous souhaitez créer un compte, faire une réservation, etc. sur un site internet.Ce test (parfois même compliqué pour un humain, car les chiffres sont illisibles) créé par Luis von Ahn, permet de différencier automatiquement un humain d'une machine. En effet, lors de l'essor...

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• This Week in Geek History: YouTube goes Public, Blu-ray vs. HD DVD, and All Your Base Are Belong To Us

  - by Jason Fitzpatrick

  Every week we bring you a snapshot of the current week in the history of technological and geeky endeavors. This week we’re taking a look at the birth of YouTube, the death of the HD DVD format, and the first mega meme. Latest Features How-To Geek ETC How to Enable User-Specific Wireless Networks in Windows 7 How to Use Google Chrome as Your Default PDF Reader (the Easy Way) How To Remove People and Objects From Photographs In Photoshop Ask How-To Geek: How Can I Monitor My Bandwidth Usage? Internet Explorer 9 RC Now Available: Here’s the Most Interesting New Stuff Here’s a Super Simple Trick to Defeating Fake Anti-Virus Malware The Citroen GT – An Awesome Video Game Car Brought to Life [Video] Final Man vs. Machine Round of Jeopardy Unfolds; Watson Dominates Give Chromium-Based Browser Desktop Notifications a Native System Look in Ubuntu Chrome Time Track Is a Simple Task Time Tracker Google Sky Map Turns Your Android Phone into a Digital Telescope Walking Through a Seaside Village Wallpaper

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• Creating classed in JavaScript

  - by Renso

  Goal:Creating class instances in JavaScript is not available since you define "classes" in js with object literals. In order to create classical classes like you would in c#, ruby, java, etc, with inheritance and instances.Rather than typical class definitions using object literals, js has a constructor function and the NEW operator that will allow you to new-up a class and optionally provide initial properties to initialize the new object with.The new operator changes the function's context and behavior of the return statement.var Person = function(name) {   this.name = name;};   //Init the personvar dude= new Person("renso");//Validate the instanceassert(dude instanceof Person);When a constructor function is called with the new keyword, the context changes from global window to a new and empty context specific to the instance; "this" will refer in this case to the "dude" context.Here is class pattern that you will need to define your own CLASS emulation library:var Class = function() {   var _class = function() {      this.init.apply(this, arguments);   };   _class.prototype.init = function(){};   return _class;}var Person a new Class();Person.prototype.init = function() {};var person = new Person;In order for the class emulator to support adding functions and properties to static classes as well as object instances of People, change the emulator:var Class = function() {   var _class = function() {      this.init.apply(this, arguments);   };   _class.prototype.init = function(){};   _class.fn = _class.prototype;   _class.fn.parent = _class;   //adding class properties   _class.extend = function(obj) {      var extended = obj.extended;      for(var i in obj) {         _class[i] = obj[i];      };      if(extended) extended(_class);   };   //adding new instances   _class.include = function(obj) {      var included = obj.included;      for(var i in obj) {         _class.fn[i] = obj[i];      };      if(included) included(_class);   };   return _class;}Now you can use it to create and extend your own object instances://adding static functions to the class Personvar Person = new Class();Person.extend({   find: function(name) {/*....*/},      delete: function(id) {/*....*/},});//calling static function findvar person = Person.find('renso');   //adding properties and functions to the class' prototype so that they are available on instances of the class Personvar Person = new Class;Person.extend({   save: function(name) {/*....*/},   delete: function(id) {/*....*/}});var dude = new Person;//calling instance functiondude.save('renso');

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• How to determine if class meets single responsibility principle ?

  - by user1483278

  Single Responsibility Principle is based on high cohesion principle. The difference between the two is that highly cohesive classes feature a set of responsibilities that are strongly related, while classes adhering to SRP have just one responsibility. But how do we determine whether particular class features a set of responsibilities and is thus just highly cohesive, or whether it has only one responsibility and is thus adhering to SRP? Namely, isn't it more or less subjective, since some may find class very granular ( and as such will consider a class as adhering to SRP ), while others may find it not granular enough?

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• How do these hotshot developers keep changing their technology base ?

  - by pankajdoharey

  Yesterday I was watching a lynda.com iphone development video and this developer started telling about how he has worked on 17 different languages from the days of mainframes in assembly/Cobol to now on iPhone Objective-C. My question is how do these developers keep shifting to new technology, without fearing the loss of experience they already have about a particular technology. I am trying to shift to Java from PHP and market considers this as non-relevant experience. How do these guys do it without losing the pay and not being considered a fresher in a particular technology.

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• What is a 'good number' of exceptions to implement for my library?

  - by Fuzz

  I've always wondered how many different exception classes I should implement and throw for various pieces of my software. My particular development is usually C++/C#/Java related, but I believe this is a question for all languages. I want to understand what is a good number of different exceptions to throw, and what the developer community expect of a good library. The trade-offs I see include: More exception classes can allow very fine grain levels of error handling for API users (prone to user configuration or data errors, or files not being found) More exception classes allows error specific information to be embedded in the exception, rather than just a string message or error code More exception classes can mean more code maintenance More exception classes can mean the API is less approachable to users The scenarios I wish to understand exception usage in include: During 'configuration' stage, which might include loading files or setting parameters During an 'operation' type phase where the library might be running tasks and doing some work, perhaps in another thread Other patterns of error reporting without using exceptions, or less exceptions (as a comparison) might include: Less exceptions, but embedding an error code that can be used as a lookup Returning error codes and flags directly from functions (sometimes not possible from threads) Implemented an event or callback system upon error (avoids stack unwinding) As developers, what do you prefer to see? If there are MANY exceptions, do you bother error handling them separately anyway? Do you have a preference for error handling types depending on the stage of operation?

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• Tutoriel OpenGL Moderne : shaders de base, apprenez à utiliser des objets transparents dans vos scènes en OpenGL 3 et supérieur

  Bonjour à tous,La rubrique 2D/3D/Jeux est heureuse de vous présenter une la suite de la série de tutoriels consacrée à OpenGL moderne (les versions à partir d'OpenGL 3.3). Ces tutoriels vous permettront d'intégrer facilement les nouveaux concepts d'OpenGL afin de profiter au maximum des dernières technologies de vos cartes graphiques. Ce dixième tutoriel vous apprendra à mettre en place la transparance dans vos applications OpenGL.Bonne lecture.

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• Where can I get a list or data base of light reflectance values for different materials?

  - by mikidelux

  I'm implementing lighting for a WebGL app but I'm not an artist so I don't know how to generate or where to obtain a list of materials with its values (diffuse, specular, ambient and shininess). I've been searching a lot but with no luck. Is there any list or DB I might have overlooked? Any common repository or something similar? Thanks in advance. Note: English is not my main language, let me know if you don't understand something and I'll try to rephrase it.

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• To reorganize code, what to choose between library and service?

  - by essbeev

  I want to reorganize a large application with lot of code duplication into multiple components. Plus, some code is also duplicated over other applications. The common set of functionality that can be taken out of main application is clearly defined. Now, do I write a library or do I write a service for this functionality; so that all such applications continue to work and there is only one code-base (of common functionality) to maintain ?

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• I can not cd "LaunchAgents" on macbook

  - by why

  after installing mongdb on my macbook-pro, it tells me: If this is your first install, automatically load on login with: cp /usr/local/Cellar/mongodb/1.6.3-x86_64/org.mongodb.mongod.plist ~/Library/LaunchAgents launchctl load -w ~/Library/LaunchAgents/org.mongodb.mongod.plist If this is an upgrade and you already have the org.mongodb.mongod.plist loaded: launchctl unload -w ~/Library/LaunchAgents/org.mongodb.mongod.plist cp /usr/local/Cellar/mongodb/1.6.3-x86_64/org.mongodb.mongod.plist ~/Library/LaunchAgents launchctl load -w ~/Library/LaunchAgents/org.mongodb.mongod.plist Or start it manually: mongod run --config /usr/local/Cellar/mongodb/1.6.3-x86_64/mongod.conf but after i copy org.mongodb.mongod.plist to ~/Library/LaunchAgents, it tells me launchctl load -w ~/Library/LaunchAgents/org.mongodb.mongod.plist launchctl: Couldn't stat("/Users/liuqiang/Library/LaunchAgents/org.mongodb.mongod.plist"): Not a directory and also i can not cd "~/Library/LaunchAgents", but i can ls the directory! "~/Library/LaunchAgents" is a strange directory in mac.

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• Can I Base My Game on Another Game and Earn Money? [closed]

  - by Neb

  Possible Duplicate: How closely can a game resemble another game without legal problems I want make a game similar to Pocket Tanks but for Android and then sell it. Since I am not directly copying anything from Pocket Tanks, but simply using it to give me ideas, I should be allowed to make it. I don't want to finish making my game and then get into some legal trouble, so I wanted to ask here if its allowed. If this is the wrong place to ask, can you tell me where I could ask this question?

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• Un expert en sécurité sort Aviator, un navigateur basé sur Chromium qui vide son cache par défaut et bloque l'installation des cookies tiers

  Protection de la vie privée : Aviator le nouveau navigateur voit le jour il vide part défaut son cache de navigation et bloque l'installation des cookies tiersSelon des experts en sécurité web, deux types de menaces principales guettent les internautes. Ces menaces ont en commun d'installer sur l'ordinateur des utilisateurs des logiciels. Alors que le premier type installe des malwares, la seconde catégorie est moins dangereuse. Les logiciels qu'elle installe sont plutôt du type espion.Si pour...

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• Should I pass an object into a constructor, or instantiate in class?

  - by Prisoner

  Consider these two examples: Passing an object to a constructor class ExampleA { private $config; public function __construct($config) { $this->config = $config; } } $config = new Config; $exampleA = new ExampleA($config); Instantiating a class class ExampleB { private $config; public function __construct() { $this->config = new Config; } } $exampleA = new ExampleA(); Which is the correct way to handle adding an object as a property? When should I use one over the other? Does unit testing affect what I should use?

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