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  • SQL SERVER The Difference between Dual Core vs. Core 2 Duo

    I have decided that I would not write on this subject until I have received a total of 25 questions on this subject. Here are a few questions from the list: Questions: What is the difference between Dual Core and Core 2 Duo? Which one is recommended for SQL Server: Core 2 Duo or Dual [...]...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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  • How do I write a writer method for a class variable in Ruby?

    - by tepidsam
    I'm studying Ruby and my brain just froze. In the following code, how would I write the class writer method for 'self.total_people'? I'm trying to 'count' the number of instances of the class 'Person'. class Person attr_accessor :name, :age @@nationalities = ['French', 'American', 'Colombian', 'Japanese', 'Russian', 'Peruvian'] @@current_people = [] @@total_people = 0 def self.nationalities #reader @@nationalities end def self.nationalities=(array=[]) #writer @@nationalities = array end def self.current_people #reader @@current_people end def self.total_people #reader @@total_people end def self.total_people #writer #-----????? end def self.create_with_attributes(name, age) person = self.new(name) person.age = age person.name = name return person end def initialize(name="Bob", age=0) @name = name @age = age puts "A new person has been instantiated." @@total_people =+ 1 @@current_people << self end

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  • How to Execute Base Class's Method Before Implementors's Method?

    - by DaveDev
    I have the following page public partial class GenericOfflineCommentary : OfflineFactsheetBase { } where OfflineFactsheetBase is defined as public class OfflineFactsheetBase : System.Web.UI.Page { public OfflineFactsheetBase() { this.Load += new EventHandler(this.Page_Load); this.PreInit += new EventHandler(this.Page_PreInit); } protected void Page_PreInit(object sender, EventArgs e) { if (Request.QueryString["data"] != null) { this.PageData = StringCompressor.DecompressString(Request.QueryString["data"]); this.ExtractPageData(); } } } OfflineFactsheetBase has the following virtual method: public virtual void ExtractPageData() { // get stuff relevant to all pages that impmement OfflineFactsheetBase } which is implemented in all pages that impmement OfflineFactsheetBase as follows: public partial class GenericOfflineCommentary : OfflineFactsheetBase { public override void ExtractPageData() { // get stuff relevant to an OfflineCommentary page. } } Currently, only GenericOfflineCommentary's ExtractPageData() is firing. How can I modify this to first run OfflineFactsheetBase's ExtractPageData() and then GenericOfflineCommentary's? edit: I'm trying to avoid having to call base.ExtractPageData() in every implementor. Is this possible?

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  • NUnit vs. MsTest: NUnit wins for Unit Testing.

    People are still wondering what are the differences between the two most popular unit testing frameworks in the .NET world: the open source NUnit and the commercial MsTest). Heres a short list of what i remember instantly: Nunit contains a [TestCase] attribute that allows implementing parametrized tests. this does not exist in msTest MsTest's ExpectedException attribute has a bug where the expected message is never really asserted even if it's wrong - the test will pass. Nunit has an...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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  • What's the deal with a leading underscore in PHP class methods?

    - by nocash
    While looking over various PHP libraries I've noticed that a lot of people choose to prefix some class methods with a single underscore, such as public function _foo() ...instead of... public function foo() I realize that ultimately this comes down to personal preference, but I was wondering if anyone had some insight into where this habit comes from. My thought is that it's probably being carried over from PHP 4, before class methods could be marked as protected or private, as a way of implying "do not call this method from outside the class". However, it also occurred to me that maybe it originates somewhere (a language) I'm not familiar with or that there may be good reasoning behind it that I would benefit from knowing. Any thoughts, insights and/or opinions would be appreciated.

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  • Cost vs. Fun - Dilemma about learning a serverside language [closed]

    - by Ixx
    I want to learn a new server-side language. I already know Java. I'm fascinated by Scala, have read about it a lot, and want to get practical experience. But I also have some concerns of practical nature - I want to do the backend for many small, non-profit apps, and pay the lowest price for hosting possible. I also want that other people can easily contribute to these apps, if applicable. This leads me in PHP's direction. But I don't like PHP and would like to use these small projects to learn Scala instead. You see the problem, I don't want to pay more money each month, from my own pocket, for hosting. But I want to use these projects to learn Scala. Is there a practical solution for this?

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  • Is there anything wrong with a class with all static methods?

    - by MatthewMartin
    I'm doing code review and came across a class that uses all static methods. The entrance method takes several arguments and then starts calling the other static methods passing along all or some of the arguments the entrance method received. It isn't like a Math class with largely unrelated utility functions. In my own normal programming, I rarely write methods where Resharper pops and says "this could be a static method", when I do, they tend to be mindless utility methods. Is there anything wrong with this pattern? Is this just a matter of personal choice if the state of a class is held in fields and properties or passed around amongst static methods using arguments?

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  • How can I declare a pointer structure using {}?

    - by Y_Y
    This probably is one of the easiest question ever in C programming language... I have the following code: typedef struct node { int data; struct node * after; struct node * before; }node; struct node head = {10,&head,&head}; Is there a way I can make head to be *head [make it a pointer] and still have the availability to use '{ }' [{10,&head,&head}] to declare an instance of head and still leave it out in the global scope? For example: //not legal!!! struct node *head = {10,&head,&head};

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  • What are the pros and cons of public sector vs private sector software development? [closed]

    - by j.i.h.
    I'm currently considering a job working for my state of residence. However, besides the obvious drawback of far less compensation than I could get in the private sector, are there any other drawbacks? Are there any upsides to public work, besides helping society at large and benefits? My main concern is that if I work in the public sector, I might be stained with the perception that I "got along" in an uncompetitive environment. I have no idea if this would be the actual environment, but it seems to be the preconception about government work--unionized workers who are simply there because the union keeps them from being fired. So, does anyone have experience working for the government? Do you have experiences working with people transitioning from public to private sector?

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  • Is There A Need For End-To-End ExtJS to Microsoft Server (MVC-C#, LOB) 4 Day Class? (Poll Enclosed)

    Over the past couple years, the focus of the web development Ive been doing involves building highly flexible, highly scalable and straight forward web sites to implement and maintain Line of... This site is a resource for asp.net web programming. It has examples by Peter Kellner of techniques for high performance 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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  • Where do you earn more money (Autonomous Systems vs Distributed Systems)? [closed]

    - by Puckl
    I am interested in both topics and I can choose between them for my computer science master. I think the distributed systems master focuses more on software technologies and the autononmous systems master is focused on robotics and machine learning. Do you get good jobs in the fild of machine learning without a Ph.D.? I guess there are more jobs available in the Software-Tech world, is this right? Where do you earn more money? (It is not the only criteria, but it matters)

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  • F# - When do you use a class instead of a record when you do not want to use mutable fields?

    - by fairflow
    I'm imagining a situation where you are creating an F# module in a purely functional style. This means objects do not have mutable fields and are not modified in place. I'm assuming for simplicity that there is no need to use .NET objects or other kinds of objects. There are two possible ways of implementing an object-oriented kind of solution: the first is to use type classes and the second to use records which have fields of functional type, to implement methods. I imagine you'd use classes when you want to use inheritance but that otherwise records would be adequate, if perhaps clumsier to express. Or do you find classes more convenient than records in any case?

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  • What's the syntax to import a class in a default package in Java?

    - by Lord Torgamus
    Possible Duplicate: How to access java-classes in the default-package? Is it possible to import a class in Java which is in the default package? If so, what is the syntax? For example, if you have package foo.bar; public class SomeClass { // ... in one file, you can write package baz.fonz; import foo.bar.SomeClass; public class AnotherClass { SomeClass sc = new SomeClass(); // ... in another file. But what if SomeClass.java does not contain a package declaration? How would you refer to SomeClass in AnotherClass?

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  • .NET Compact Framework 3.9 : compatibilité avec VS 2012, gain de performance et support du multi-core pour l'outil

    .NET Compact Framework 3.9 sera compatible avec Visual Studio 2012 gain de performance et support du multi-coeur pour la version embarquée de .NET Microsoft a dévoilé la semaine dernière sa feuille de route pour l'ensemble de ses systèmes d'exploitation embarqués. L'éditeur prévoit de publier au second trimestre de l'année prochaine Windows Embedded Compact 2013, son OS destiné aux terminaux tactiles légers. Dans cette version, sera inclus le Framework .NET Compact (NETCF) 3.9, la prochaine mise à jour de la plateforme de développement pour l'embarqué. Pour rappel, .NET Framework Compact est une version du Framework .NET pour les périphériques embarqués. Il f...

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  • What .NET UnmanagedType is Unicode (UTF-16)?

    - by Pat
    I am packing bytes into a struct, and some of them correspond to a Unicode string. The following works fine for an ASCII string: [StructLayout(LayoutKind.Sequential)] private struct PacketBytes { [MarshalAs(UnmanagedType.ByValTStr, SizeConst = 64)] public string MyString; } I assumed that I could do [StructLayout(LayoutKind.Sequential)] private struct PacketBytes { [MarshalAs(UnmanagedType.LPWStr, SizeConst = 32)] public string MyString; } to make it Unicode, but that didn't work. (Since this field is part of a struct with other fields, which I've omitted for clarity, I can't simply change the CharSet of the containing struct.) Any idea what I'm doing wrong?

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  • Better way to find Class in event.target parentnodes using jquery and javascript?

    - by Cama
    Currently, I check the target of the input box keyup event to see if it is contained within a div wit class "editorRow" using: var $parentClass = event.target.parentNode.parentNode.parentNode.className; Is there a better way to do this in case extra markup is added between the div and the span tags? <div class="editorRow"> <li> <span class="wi1"> <input type="text" value="" style="width: 80px;" name="LineItems9" id="LineItems_9"> </span> </li> </div>   $("input").live("keyup", function(event) { return GiveDynamicFieldsLife(event); }); function GiveDynamicFieldsLife(event) { **var $parentClass = event.target.parentNode.parentNode.parentNode.className;** if ($parentClass == "editorRow") { //Do Stuff } }

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  • Secure C# Assemblies from unauthorized Callers

    - by Creepy Gnome
    Is there any way to secure your assembly down to the class/property & class/method level to prevent the using/calling of them from another assembly that isn't signed by our company? I would like to do this without any requirements on strong naming (like using StrongNameIdentityPermission) and stick with how an assembly is signed. I really do not want to resort to using the InternalsVisibleTo attribute as that is not maintainable in a ever changing software ecosystem. For example: Scenario One Foo.dll is signed by my company and Bar.dll is not signed at all. Foo has Class A Bar has Class B Class A has public method GetSomething() Class B tries to call Foo.A.GetSomething() and is rejected Rejected can be an exception or being ignored in someway Scenario Two Foo.dll is signed by my company and Moo.dll is also signed by my company. Foo has Class A Moo has Class C Class A has public method GetSomething() Class C tries to call Foo.A.GetSomething() and is not rejected

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  • Static vs. dynamic memory allocation - lots of constant objects, only small part of them used at runtime

    - by k29
    Here are two options: Option 1: enum QuizCategory { CATEGORY_1(new MyCollection<Question>() .add(Question.QUESTION_A) .add(Question.QUESTION_B) .add...), CATEGORY_2(new MyCollection<Question>() .add(Question.QUESTION_B) .add(Question.QUESTION_C) .add...), ... ; public MyCollection<Question> collection; private QuizCategory(MyCollection<Question> collection) { this.collection = collection; } public Question getRandom() { return collection.getRandomQuestion(); } } Option 2: enum QuizCategory2 { CATEGORY_1 { @Override protected MyCollection<Question> populateWithQuestions() { return new MyCollection<Question>() .add(Question.QUESTION_A) .add(Question.QUESTION_B) .add...; } }, CATEGORY_2 { @Override protected MyCollection<Question> populateWithQuestions() { return new MyCollection<Question>() .add(Question.QUESTION_B) .add(Question.QUESTION_C) .add...; } }; public Question getRandom() { MyCollection<Question> collection = populateWithQuestions(); return collection.getRandomQuestion(); } protected abstract MyCollection<Question> populateWithQuestions(); } There will be around 1000 categories, each containing 10 - 300 questions (100 on average). At runtime typically only 10 categories and 30 questions will be used. Each question is itself an enum constant (with its fields and methods). I'm trying to decide between those two options in the mobile application context. I haven't done any measurements since I have yet to write the questions and would like to gather more information before committing to one or another option. As far as I understand: (a) Option 1 will perform better since there will be no need to populate the collection and then garbage-collect the questions; (b) Option 1 will require extra memory: 1000 categories x 100 questions x 4 bytes for each reference = 400 Kb, which is not significant. So I'm leaning to Option 1, but just wondered if I'm correct in my assumptions and not missing something important? Perhaps someone has faced a similar dilemma? Or perhaps it doesn't actually matter that much?

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  • How do you stop Eclipse from inserting a certain class in Content-Assist?

    - by fletchgqc.mp
    I'm using SpringSource Tool Suite (Eclipse) to program with Grails, and I'm also using JFreechart in the program. In Grails you log by typing log.info("method worked"). Unfortunately JFrechart has a class called "Log" with Static methods like "info". This means that in STS I type log.info and then when I type space or ( Eclipse "assists" me by importing the JFreechart Log class and changing what I've typed to Log.info(message). Very irritating. I reckon I could turn off the Eclipse option to "insert single proposals automatically", but I like this feature. Can I instruct Eclipse not to give me content assist from this particular JFreechart class?

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  • How do you expose a C++ class in the V8 Javascript Engine so it can be created using new?

    - by Steve Hanov
    The official examples of exposing a Point class seem to assume that there will be a fixed number of instances of it in your program. It is not clear how new instances are allocated in the C++ code, when new is called in Javascript. How would you expose a class that can have multiple instances? For example, an Image class: var img1 = new Image( 640, 480 ); var img2 = new Image( 1024, 768 ); img1.clear( "red" ); img2.clear( "black" );

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  • What are the design principles that promote testable code? (designing testable code vs driving design through tests)

    - by bot
    Most of the projects that I work on consider development and unit testing in isolation which makes writing unit tests at a later instance a nightmare. My objective is to keep testing in mind during the high level and low level design phases itself. I want to know if there are any well defined design principles that promote testable code. One such principle that I have come to understand recently is Dependency Inversion through Dependency injection and Inversion of Control. I have read that there is something known as SOLID. I want to understand if following the SOLID principles indirectly results in code that is easily testable? If not, are there any well-defined design principles that promote testable code? I am aware that there is something known as Test Driven Development. Although, I am more interested in designing code with testing in mind during the design phase itself rather than driving design through tests. I hope this makes sense. One more question related to this topic is whether it's alright to re-factor an existing product/project and make changes to code and design for the purpose of being able to write a unit test case for each module?

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  • Dynamic menu items (change text on click)

    - by Mathijs Delva
    Hello, i need some help with a menu. See the following menu: menu The code for this menu: <div id="menu"> <ul> <li class="home"><a href="#home" class="panel">home / <span class="go">you are here</span></a></li> <li class="about"><a href="#about" class="panel">about / <span class="go">go here</span></a></li> <li class="cases"><a href="#cases" class="panel">cases / <span class="go">go there</span></a></li> <li class="photos"><a href="#photos" class="panel">photos / <span class="go">maybe here</span></a></li> <li class="contact"><a href="#contact" class="panel">contact / <span class="go">or even here<span></span></a></li> </ul> </div> What i want to do: onclick a menu item: 1. change the red text to yellow 'you are here' 2. change the previous menu item back to its original state (eg red and "go here"). The 4 values "go here", "go there", "maybe here", "or even here" are the 4 values that should be assigned to the other menu items (like the example). This is the code i already have: $('#menu ul li.home').addClass('active') $('#menu ul li.active a .go').html("you are here"); $("#menu ul li").click(function () { $('#menu ul li.active').removeClass('active'); $(this).addClass('active'); $('#menu ul li.active a .go').html("you are here"); }); var arr = [ "go here", "go there", "maybe here", "or even here" ]; var obj = { item1: "go here", item2: "go there" ,item3: "maybe here", item4: "or even here"}; $('#menu ul li').click(function () { var str = $('#menu ul li.active a .go').text(); $('#menu ul li.active a .go').html(str); }); As you see, it's incomplete. I don't how to get the values from the array and assign them too a menu item. The replace text works, but not the change-back-to-original-state. Also, right now, for some reason i can't click ONTO the list item itself in order to activate the jquery code. I need to click just a few pixels under it. But i guess that's a css issue. If anyone can help, i'd be super thankful! Regards, Mathijs

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