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Search found 4012 results on 161 pages for 'concept hierarchy'.

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• Difference between the Repository Pattern and the View Model Pattern

  - by Mark Sayewich

  I am trying to create a site using the ASP MVC Framework. Some of the documentation use the IRepository pattern to abstract the information being sent to the view for rendering, while others recommend using a ViewModel (as in MVVC). What is the difference? Aren't these the same concept? Thanks in advance

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• Sample c# application using Northwind 2007 Access database

  - by metro

  Is there a sample C# winform application (a starter kit or something ) which use the Northwind 2007 Acess Database version ? some concept like http://northwind.codeplex.com/ ? many thanks.

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• Secure Delete PCI-DSS Windows Environment

  - by Brennan Mann

  Hello, I have been reviewing a number of applications for securing deleting files. I understand the concepts of overwriting the file several times with zeros and random characters; however, I don't understand the concept of renaming the file up to thirty times before actually deleting the file. Any feedback would greatly be appreciated. I am currently working on a PCI DSS project. URL - SDELETE by Sysinternals http://technet.microsoft.com/en-us/sysinternals/bb897443.aspx Thanks, Brennan

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• Fluent Nhibernate - Mapping two entities to same table

  - by Andy

  Hi, I'm trying to map two domain entities to the same table. We're doing a smart entity for our domain model, so we have the concept of an Editable Address and a readonly Address. I have both mapped using Classmaps, and everything seems to go fine until we try to export the schema using the SchemaExport class from NHibernate. It errors out saying the table already exists. I assume it's something simple that I'm just not seeing. Any ideas? Thanks

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• Sales Career in Cloud Computing

  - by ricky

  I am working with a Google's business partner and selling Google Apps which is based on cloud computing concept. As we all know cloud computing is ready to capture the IT world, So I just wanted to take suggestion from you experts here about the sales career in Cloud computing I am a Post graduate in Sales and Marketing and planning to dig deeper into Cloud computing from sales point of view. I would appreciate if you can assist me with my path creation to achieve good career in cloud computing. Regards, Jason Robb

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• Test data generators / quickest route to generating solid, non-repetitive, but not-real database sam

  - by Jamo

  I need to build a quick feasibility test / proof-of-concept of a remote database for a client, that will be populated with mostly-typical Company and People data (names, addresses, etc); 150K records or so. The sample databases mentioned here were helpful: http://stackoverflow.com/questions/57068/good-databases-with-sample-data ...but, I'd like to be able to generate sample data like this easily on less-typical datasets as well. Anyone have any recommendations for off-the-shelf (or off-the-web) solutions?

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• pitfalls/disadvantages of functional programming

  - by CrazyJugglerDrummer

  When would you NOT want to use functional programming? What is it not so good at? I am more looking for disadvantages of the paradigm as a whole, not things like "not widely used", or "no good debugger available". Those answers may be correct as of now, but they deal with FP being a new concept (an unavoidable issue) and not any inherent qualities. Related: pitfalls of object oriented programming advantages of functional programming

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• UIView's frame, bounds, center, origin, when to use what?

  - by Boon

  UIView has the concept of frame, bounds, center, and origin, and they all seem to be interrelated. Most of the time, I deal with frame when setting the position and size of a UIView (or subclass). I understand that the frame is using global coordinate system and the bounds is using coordinate of the local view (therefore it's x and y are 0, but not always), but it's still confusing to me when to use what. Question: Under what context (and what's the right time) the other properties (bounds, center, origin) should be used?

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• Please explain about AbInitio recovery file(.rec)?When should we roll back the file?

  - by srihari

  Hi All, Please tell the concept of AbInitio recovery file. When the Abinitio graph fails in execution which cases should we rollback the recovery file and in which cases we shouldnt rollback the recovery file. Please provide links for any AbInitio materials. Thanks.

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• C# 4: Real-World Example of Dynamic Types

  - by routeNpingme

  I think I have my brain halfway wrapped around the Dynamic Types concept in C# 4, but can't for the life of me figure out a scenario where I'd actually want to use it. I'm sure there are many, but I'm just having trouble making the connection as to how I could engineer a solution that is better solved with dynamics as opposed to interfaces, dependency injection, etc. So, what's a real-world application scenario where dynamic type usage is appropriate?

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• ASP.NET MVC Routing Via Method Attributes

  - by TorgoGuy

  In the StackOverflow Podcast #54, Jeff mentions they register their URL routes in the StackOverflow codebase via an attribute above the method that handles the route. Sounds like a good concept (with the caveat that Phil Haack brought up regarding route priorities). Could someone provide some sample to to make this happen? Also, any "best practices" for using this style of routing?

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• (RAD Studio) Virtual TreeView: how to initialize all nodes at once?

  - by Andrew

  Hi, I just discovered this component and started working with it. I understand that the whole concept of it is to initialize nodes on the go as they are needed but I need all of them to initialize instantly. What is the smart way to do it? The only thing I came up with is to use GetLast() after adding nodes. I believe, there is a better way, or not?

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• Is there an equivalent of latex \newcommand in mediawiki

  - by Amit Kumar

  I want to create a command in mediawiki. For example, in latex I can do \newcommand{\concept}{\textbf} Is it possible to create an alias for '''foo''' and so on?

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• When in Debug mode in Java, is there anything like a Console where I can type commands?

  - by devoured elysium

  Is it possible in Eclipse to have a Console, where when in Debug mode I can try out things? Like in python, where I can type at any moment for example 1+1 or myVariable.toString(), etc? C# has a similar concept with the F# shell. I'd like to inspect my variables at run-time and try out some methods, having that kind of console would be of great help. Thanks

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• Value vs Entity objects (Domain Driven Design)

  - by StackUnderflow

  I have just started reading DDD. I am unable to completely grasp the concept of Entity vs Value objects.. Can someone please explain the problems (maintainability, performance.. etc) a system could face when a Value object is designed as a Entity object. Example would be great... Thanks

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• char pointers & integer pointers (++)

  - by benjamin button

  i have two pointers, char *str1; int *str2; if i look at the size of both the pointers lets assume str1=4 bytes str2=4 bytes str1++ will increment by 1 byte but if str2++ will increment 4 byte could anybody tell e the concept behind this?

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• Best Role-Based Access Control (RBAC) database model

  - by jhs

  What is the best database schema to track role-based access controls for a web application? I am using Rails, but the RBAC plugin linked by Google looks unmaintained (only 300 commits to SVN; latest was almost a year ago). The concept is simple enough to implement from scratch, yet complex and important enough that it's worth getting right. So how do others architect and implement their RBAC model?

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• TDD a controller with ASP.NET MVC 2, NUnit and Rhino Mocks

  - by Nissan Fan

  What would a simple unit test look like to confirm that a certain controller exists if I am using Rhino Mocks, NUnit and ASP.NET MVC 2? I'm trying to wrap my head around the concept of TDD, but I can't see to figure out how a simple test like "Controller XYZ Exists" would look. In addition, what would the unit test look like to test an Action Result off a view?

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• python3: removing several chars from a string with a long chain of .replace().replace().replace()

  - by MadSc13ntist

  I found this example on stack overflow. I understand it, but seems like a bit much for such a simple method concept... removing several chars from a string. import string exclude = set(string.punctuation) s = ''.join(ch for ch in s if ch not in exclude) is there a builtin string method in python 3.1 to do something to the tune of: s = "a,b,c,d,e,f,g,h,i" s = s.strip([",", "d", "h"]) instead of: s = s.replace(",", "").replace("d", "").replace("h", "")

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• What is the difference between RDF and OWL?

  - by vicky21

  I am trying to grasp the concept of Semantic Web. I am finding it hard to understand what exactly is the difference between RDF and OWL. Is OWL an extension of RDF or these two are totally different technologies?

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• Vaadin - GWT error "module xxx may need to be recompiled

  - by John Leonard

  I'm ramping up on Vaadin and I'm getting this javascript alert whenever I try and run the demo apps. GWT module 'com.vaadin.terminal.gwt.DefaultWidgetSet' may need to be recompiled I've tried cleaning the project to no avail. As I said, I'm ramping up so I'm sure there's some simple step I'm missing or a concept I haven't grasped.

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• PHP: Script for generating Crossword game?

  - by Prashant

  I need an script for generating crossword game. I have a list of 8 words for which I wnat to generate a crossword game, let's say for 15 column and 15 row. I am not getting the concept of this problem. How to generate this using PHP ?? Can anyone tell me how to do that ??

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• How to handle Oracle Store Procedure call with Oracle Types as input or output using EclipseLink

  - by MAK

  Hi, I doing a Proof Of Concept to figure out how efficient to call a store procedure using EclipseLink. I was able to call oracle store procedure using EclispeLink with Scalar/primitive data types (link Integer, varchar etc). I wanted to understand how can I handle Oracle Store procedure from EclipseLink with collection(Oracle Types/User defined types) as input or output parameters. I would really appreciate if some one help me understand this with an example. Thanks MAK

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• What is validating a binary search tree?

  - by dotnetdev

  I read on here of an exercise in interviews known as validating a binary search tree. How exactly does this work? What would one be looking for in validating a binary search tree? I have written a basic search tree, but never heard of this concept. Thanks

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• Eclipse IDE Learning Curve

  - by Vladimir Georgiev

  I am a C# guy with pretty good grasp of Visual Studio IDE usage (using it since VS2003). Right now, I am doing a proof of concept app using Eclipse 3.4.1. Is there any good reference or book which describes the usage of Eclipse IDE, compared to Visual Studio. Is there any Eclipse guide for Visual Studio users :) Thanks, in advance.

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