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  • Pros and Cons of C vs C++ programming

    - by Mohit Deshpande
    I am trying to decide on whether I should learn C or C++. I come from a very object-oriented background of java and C#. I have heard that C++ is more object-oriented than C, BUT I have also heard that a C program compiles and runs faster than a C++ program. Please help me get the facts straight by giving pros and cons of BOTH points of views. (Points of views being C over C++, or C++ over C)

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  • Advice Please: SQL Server Identity vs Unique Identifier keys when using Entity Framework

    - by c.batt
    I'm in the process of designing a fairly complex system. One of our primary concerns is supporting SQL Server peer-to-peer replication. The idea is to support several geographically separated nodes. A secondary concern has been using a modern ORM in the middle tier. Our first choice has always been Entity Framework, mainly because the developers like to work with it. (They love the LiNQ support.) So here's the problem: With peer-to-peer replication in mind, I settled on using uniqueidentifier with a default value of newsequentialid() for the primary key of every table. This seemed to provide a good balance between avoiding key collisions and reducing index fragmentation. However, it turns out that the current version of Entity Framework has a very strange limitation: if an entity's key column is a uniqueidentifier (GUID) then it cannot be configured to use the default value (newsequentialid()) provided by the database. The application layer must generate the GUID and populate the key value. So here's the debate: abandon Entity Framework and use another ORM: use NHibernate and give up LiNQ support use linq2sql and give up future support (not to mention get bound to SQL Server on DB) abandon GUIDs and go with another PK strategy devise a method to generate sequential GUIDs (COMBs?) at the application layer I'm leaning towards option 1 with linq2sql (my developers really like linq2[stuff]) and 3. That's mainly because I'm somewhat ignorant of alternate key strategies that support the replication scheme we're aiming for while also keeping things sane from a developer's perspective. Any insight or opinion would be greatly appreciated.

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  • Storring data in web.config(custom section/appSettings element) vs storing it in a class

    - by rubysons
    Hi. Why is it better to store data inside an appSettings element (or inside a custom section) of a web.config file than to store it in a class? One argument would be that by using custom sections we don’t have to recompile code when we change data, but that’s a weak argument, especially if we’re using Web Sites, which get recompiled automatically whenever code changes! Thank you

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  • Modularity Java: top level vs. nested classes

    - by an00b
    The Java tutorials that I read, like to use nested classes to demonstrate a concept, a feature or use. This led me to initially implement a sample project I created just like that: Lots of nested classes in the main activity class. It works, but now I got a monstrous monolithic .java file. I find it somewhat inconvenient and I now intend to break to multiple .java files/classes. It occurred to me, however, that sometimes there may be reasons not to take classes out of their enclosing class. If so, what are good reasons to keep a module large, considering modularity and ease of maintenance?

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  • Enable debugging in Design mode in VS

    - by Dan Tao
    Is there any way to enable debugging from within the Windows Forms Designer in Visual Studio (any version, up to and including 2010)? What I mean is, say I have some custom user control, and this control has certain validation that it performs when I set a particular property. I'd like to be able to set a breakpoint somewhere within that code, and step through it to see what happens when I set the property from the designer.

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  • Contains performs MUCH slower with variable vs constant string MS SQL Server

    - by Greg R
    For some unknown reason I'm running into a problem when passing a variable to a full text search stored procedure performs many times slower than executing the same statement with a constant value. Any idea why and how can that be avoided? This executes very fast: SELECT * FROM table WHERE CONTAINS (comments, '123') This executes very slowly and times out: DECLARE @SearchTerm nvarchar(30) SET @SearchTerm = '123' SET @SearchTerm = '"' + @SearchTerm + '"' SELECT * FROM table WHERE CONTAINS (comments, @SearchTerm) Does this make any sense???

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  • QWebFrame::evaluateJavaScript vs. script-tag in HTML

    - by jwg
    Hi, I want to develop an application that uses QtWebKit and JQuery. What I need to know is, is there any difference between reading JQuery from a file and evaluateJavaScript it, or embedding it as a script tag within the "page" that is displayed within the widget? If there is a difference, I am curious if anyone could explain why it would be. As far as I understood it, evaluateJavaScript() would feed the script parameter to the JavaScript interpreter, which interprets it in the current page's context. Thanks.

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  • Folders without Namespaces C#, .Net, VS 2008

    - by Joel
    I'm working on an ASP.NET webapp using the MVP pattern, and as I'm organizing my files I'm wondering - are there conventions on folders within projects and how they relate to namespaces? I have a bunch of controls and a bunch of pages, and I was going to throw them into Controls and Pages folders with subfolders, but I didn't know if it was bad form to do this if I wasn't also going to seperate them out into namespaces. Thanks.

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  • Where to learn about VS debugger 'magic names'

    - by Gael Fraiteur
    If you've ever used Reflector, you probably noticed that the C# compiler generates types, methods, fields, and local variables, that deserve 'special' display by the debugger. For instance, local variables beginning with 'CS$' are not displayed to the user. There are other special naming conventions for closure types of anonymous methods, backing fields of automatic properties, and so on. My question: where to learn about these naming conventions? Does anyone know about some documentation? My objective is to make PostSharp 2.0 use the same conventions. Thank you!

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  • Eclipse vs Netbeans

    - by Zenzen
    Some time ago (~4-5months ago) I attented a lecture about JEE and at some point the lecturer started talking about webservices and how hard it is to create a good one because all the IDEs make them in a bit different way (or something like that) and that in general it's better to use Netbeans to create them as Eclipse has some issues, the thing is he didn't really say why Eclipse is bad. Now I'm wondering is what he said true and why, is it really better to use Netbeans for webservices and why?

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  • Spring vs Hibernate

    - by Vidar
    Just trying to get my head round Spring and figuring out how I wire up an Oracle connection in xml config file, and now find out I need yet another framework! - Hibernate, this is soooo frustrating as it feels like I'm getting deeper and deeper into more and more frameworks without actually getting what I need done! I looked at Hibernate and it seems to do similar things to Spring, bearing in mind I just want to do some SQL inserts in Oracle. I am reluctant and do not have time to learn 2 frameworks - could I get away with just adopting Hibernate for the simple things I need to do?

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  • Resetting Objects vs. Constructing New Objects

    - by byronh
    Is it considered better practice and/or more efficient to create a 'reset' function for a particular object that clears/defaults all the necessary member variables to allow for further operations, or to simply construct a new object from outside? I've seen both methods employed a lot, but I can't decide which one is better. Of course, for classes that represent database connections, you'd have to use a reset method rather than constructing a new one resulting in needless connecting/disconnecting, but I'm talking more in terms of abstraction classes. Can anyone give me some real-world examples of when to use each method? In my particular case I'm thinking mostly in terms of ORM or the Model in MVC. For example, if I would want to retrieve a bunch of database objects for display and modify them in one operation.

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  • LINQ-to-SQL vs stored procedures?

    - by scottmarlowe
    I took a look at the "Beginner's Guide to LINQ" post here on StackOverflow (http://stackoverflow.com/questions/8050/beginners-guide-to-linq), but had a follow-up question: We're about to ramp up a new project where nearly all of our database op's will be fairly simple data retrievals (there's another segment of the project which already writes the data). Most of our other projects up to this point make use of stored procedures for such things. However, I'd like to leverage LINQ-to-SQL if it makes more sense. So, the question is this: For simple data retrievals, which approach is better, LINQ-to-SQL or stored procs? Any specific pro's or con's? Thanks.

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  • AWS free tier "sign up date" vs "credit card details submission date"

    - by Mayur Rokade
    I am worried about my account expiry date. I created an account on AWS in July 2013 and submitted my credit card details on 31st Oct 2013. I went in Billing Management Console/Bills section where when I click on Date, I can see months ranging from July 2013 to Nov 2013. From AWS FAQs I gathered When does the AWS free usage tier expire? The AWS free usage tier will expire 12 months from the date you sign up. So WHEN will my account expire, July 2014 (sign up date) or Oct 2014 (credit card details submission date) ?

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  • Font choices in International scenarios: multilingual vs unicode

    - by TravisO
    I have a website that will eventually display multiple languages. I notice the common fonts used in web CSS (ex: Arial, Verdana, Times New Roman, Tahoma) and even the newer Vista/Office 2007/VS2008 fonts (Calibri,Cambria, Candara, Corbel, etc) are significantly larger (~350K) than your average (US only?) TTF font (~50k) so these fonts contain most/all the major character sets that common languages (Spanish, French, German, etc) use. My question is, would somebody confirm that these fonts listed above are acceptable for international use of the major (let's say top 8) spoken languages? If so, then I'm guessing the only purpose of unicode fonts; such "Arial Unicode" (a massive 22mb) is only for dealing with extremely niche dialog, eastern glyphs (Chinese, Japanese) and dead languages? I'm just looking for some confirmation from developers that have their desktop apps/web apps rendering multiple languages and have a visual confirmation, I'm already in the 99% sure bin but you know what they say about assumption.

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  • C# Property Access vs Interface Implementation

    - by ehdv
    I'm writing a class to represent a Pivot Collection, the root object recognized by Pivot. A Collection has several attributes, a list of facet categories (each represented by a FacetCategory object) and a list of items (each represented by a PivotItem object). Therefore, an extremely simplified Collection reads: public class Collection { private List<FacetCategory> categories; private List<PivotItem> items; // other attributes } What I'm unsure of is how to properly grant access to those two lists. Because declaration order of both facet categories and items is visible to the user, I can't use sets, but the class also shouldn't allow duplicate categories or items. Furthermore, I'd like to make the Collection object as easy to use as possible. So my choices are: Have Collection implement IList<PivotItem> and have accessor methods for FacetCategory: In this case, one would add an item to Collection foo by writing foo.Add(bar). This works, but since a Collection is equally both kinds of list making it only pass as a list for one type (category or item) seems like a subpar solution. Create nested wrapper classes for List (CategoryList and ItemList). This has the advantage of making a consistent interface but the downside is that these properties would no longer be able to serve as lists (because I need to override the non-virtual Add method I have to implement IList rather than subclass List. Implicit casting wouldn't work because that would return the Add method to its normal behavior. Also, for reasons I can't figure out, IList is missing an AddRange method... public class Collection { private class CategoryList: IList<FacetCategory> { // ... } private readonly CategoryList categories = new CategoryList(); private readonly ItemList items = new ItemList(); public CategoryList FacetCategories { get { return categories; } set { categories.Clear(); categories.AddRange(value); } } public ItemList Items { get { return items; } set { items.Clear(); items.AddRange(value); } } } Finally, the third option is to combine options one and two, so that Collection implements IList<PivotItem> and has a property FacetCategories. Question: Which of these three is most appropriate, and why?

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  • Suggestions for VS+Resharper keyboard shortcuts on a Mac

    - by John Miller
    I just upgraded to a Macbook Pro as my development machine but still primarily develop .Net applications with Visual Studio and Resharper (via VMWare Fusion). By far, the biggest obstacle I'm running into is getting used to the keyboard layout change (ex. not being able to do ALT-Insert). Do any of you Windows-on-Mac veterans have any suggestions on how to ease the pain of transitioning (without moving to an external keyboard)? Are you changing mappings via VMWare's keyboard preferences? Or are you using something like AutoHotkey? Any other windows development tips for a Mac newb?

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  • A pragmatic view on private vs public

    - by Denis Gorbachev
    Hello everybody! I've always wondered on the topic of public, protected and private properties. My memory can easily recall times when I had to hack somebody's code, and having the hacked-upon class variables declared as private was always upsetting. Also, there were (more) times I've written a class myself, and had never recognized any potential gain of privatizing the property. I should note here that using public vars is not in my habit: I adhere to the principles of OOP by utilizing getters and setters. So, what's the whole point in these restrictions?

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  • jquery ajax vs browser url

    - by danwoods
    Hello all, I'm trying to use youtube's api to bring back a listing of a user's videos. The request url looks something like: http://gdata.youtube.com/feeds/api/users/username/uploads with 'username' being the correct username. This bring back the appropriate url in the browser. However when I try to access that url via jQuery's $.ajax or $.get functions, using something like: $.ajax({ //set parameters url: "http://gdata.youtube.com/feeds/api/users/username/uploads", type: "GET", //on success success: function (data) { alert("xml successfully captured\n\n" + data); }, //on error error:function (XMLHttpRequest, textStatus, errorThrown, data){ alert(" We're sorry, there seem to be a problem with our connection to youtube.\nYou can access all our videos here: http://www.youtube.com/user/username"); alert(data); } }); $.get("http://gdata.youtube.com/feeds/api/users/username/uploads", function(data){ alert("Data Loaded: " + data); }); I get an empty document returned. Any ideas why this is?

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  • Speed of NSScanner vs NSXMLParser?

    - by Chris
    I have an iPhone App that reads in an XML file, then pulls out the necessary data by looping through an NSScanner. The XML is not particularly long. I am wondering if it would be worth the work to implement NSXMLParser in place of using NSScanner, if I will see any real improvement in speed?

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