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• DTO and Self Tracking Entities pattern in the entity framework

  - by kathy

  Hello, In What scenario that I have to use DTO's pattern in the entity framework the and not the Self Tracking Entities pattern? Can I start with Self Tracking Entities because it's easier to develop and then add DTO's in the next Phase ??? As always, your advice is greatly appreciated...

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• differences between facade pattern and other patterns

  - by asli

  Hi,I have a question about patterns.I have really problems with design patterns Can you tell me the difeerences between facade pattern with builder,factory and abstract factory pattern?

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• Could someone in simple terms explain to me the visitor pattern's purpose with examples if possible

  - by welcometocanada

  Hi, I'm really confused about the visitor pattern and its uses. I can't really seem to visualize the benefits of using this pattern or its purpose. If someone could explain with examples if possible that would be great. =) Thanks in advance

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• Generating a URL pattern when provided a set of 5 or so URLs

  - by ryan

  Provided with a set of URLs, I need to generate a pattern, For example: http://www.buy.com/prod/disney-s-star-struck/q/loc/109/213724402.html http://www.buy.com/prod/samsung-f2380-23-widescreen-1080p-lcd-monitor-150-000-1-dc-8ms-1920-x/q/loc/101/211249863.html http://www.buy.com/prod/panasonic-nnh765wf-microwave-oven-countertop-1-6-ft-1250w-panasonic/q/loc/66357/202045865.html http://www.buy.com/prod/escape-by-calvin-klein-for-women-3-4-oz-edp-spray/q/loc/66740/211210860.html http://www.buy.com/prod/v-touch-8gb-mp3-mp4-2-8-touch-screen-2mp-camera-expandable-minisd-w/q/loc/111/211402014.html Pattern is http://www.buy.com/prod/[^~]/q/loc/[^~].html

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• view handler design pattern

  - by Mark Roberts

  I'm trying to figure out the origin of the view handler design pattern in software engineering. Many of the design patterns in software engineering were inspired by things which pre-date computers, and I was wondering if anybody had any insights on the origin of this particular pattern.

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• Singleton Pattern for C#

  - by cam

  I need to store a bunch of variables that need to be accessed globally and I'm wondering if a singleton pattern would be applicable. From the examples I've seen, a singleton pattern is just a static class that can't be inherited. But the examples I've seen are overly complex for my needs. What would be the very simplest singleton class? Couldn't I just make a static, sealed class with some variables inside?

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• Python and the Singleton Pattern

  - by dmanxiii

  What is the best way to implement the singleton pattern in Python? It seems impossible to declare the constructor private or protected as is normally done with the Singleton pattern...

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• Good Sites that are describing about MVVM Pattern

  - by Dilse Naaz

  Hi, i started the learning MVVM pattern. So could anybody help me to list Some Good Sites that are describing about MVVM Pattern. thanks in advance.

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• PHP ORM library based on the Data Mapper pattern

  - by Matthieu

  For a PHP application with a complex domain model, I don't want to use the Active Record pattern, I need instead the Data Mapper pattern (as presented in Zend Framework). Do you know any library that could help me for the ORM part, or else a link to a documentation on "how to do it right" ? Thanks

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• Implementing the procducer-consumer pattern with .NET 4.0

  - by bitbonk

  With alle the new paralell programming features in .NET 4.0, what would be a a simple and fast way to implement the producer-consumer pattern (where at least one thread is producing/enqueuing task items and another thread executes/dequeues these tasks). Can we benfit from all these new APIs? What is your preferred implementation of this pattern?

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• What is the Java 1.4.2 equivalent of Pattern.quote()

  - by Luke

  What would be a Java 1.4.2 equivalent of Pattern.quote? I was using Pattern.quote() on a URI but now need to make it 1.4.2 compatible.

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• Explain "Leader/Follower" Pattern

  - by Alex B

  I can't seem to find a good explanation of "Leader/Follower" pattern. All explanations either simply refer to it in the context of some problem, or are completely meaningless. Can anyone explain to the the mechanics of how this pattern works, and why and how it improves performance over more traditional asynchronous IO models? Examples and links to diagrams are appreciated too.

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• Change log4net conversion pattern or layout at runtime

  - by adam0101

  I'm using the LogInfo() method to log to a rolling flat file, but I need to change the conversion pattern or pattern layout (whatever you want to call it) temporarily when calling it in a certain circumstance. Is this possible?

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• how to parse string into a date pattern using dojo

  - by Dojouser

  Hi, I have a value as '05/17/2010' I would like to get it as May 17, 2010 by using dojo.date.locale.I have tried using the dojo.date.locale.parse as follows : x = '05/17/2010' var x= dojo.date.locale.parse(x, {datePattern: "MM/dd/yyyy", selector: "date"}); alert(x) This doesnt give me the desired date pattern I also tried replacing the pattern as datePattern : "MMMM d, yyyy" but it returns me null. Any help highly appreciated. Thanks

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• Best way to display a background with a pattern in an iPhone/iPad app

  - by Dr Dork

  Here's an example of the type of background image I'm talking about... Clearly, there's a pattern in it. My question is, if this were an iPad app and the background image was twice the size, would there be any significant benefits to taking advantage of this pattern by tiling the image? Or would it really make no difference in terms of performance and just be easier to load the entire image into a UIImageView? Thanks in advance for all your wisdom!

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• php str_replace pattern

  - by user331071

  Hello , I have a php application that saves the pictures on the server and also stores the picture names in the database . The issue that I have is that the picture names include the path/folder where it was saved from (e.g 1220368812/chpk2198933_large-2.jpg) so I need a str_replace pattern to remove "1220368812/" and have the picture name correct stored in the db . Also I would appreciate if you will send me a good link that explains how exactly the str_replace patterns work or at least how the pattern that you use work .

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• Repository Pattern: SaveOrUpdate() in Entity Framework and L2S

  - by JMSA

  These web articles uses separate Save() and Update() methods in the repository pattern. I am using repository pattern. How can I write a SaveOrUpdate() method in Entity Framework with the help of ObjectContext and in Linq-To-SQL with the help of DataContext? That is, how can I write a single method that shall do both save and update job?

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• MVC pattern in Android?

  - by Mohit Deshpande

  Is it possible to implement the Model-View-Controller pattern in Java for Android? Or is it already implemented through Activities? Or is there a better way to implement the MVC pattern for Android?

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• Doubleton Pattern Implementation

  - by Pierreten

  I'm leveraging the Doubleton Pattern from this link http://www.codeproject.com/KB/architecture/designpattern_doubleton.aspx in my own code. I think it makes things a lot easier since the Singleton only provides one instance, but I get two with this pattern. I was wondering if it would make sense to have it implement an interface so I can inject it into my domain layer.

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• Help me to find a better approach-Design Pattern

  - by DJay

  I am working on an ASP.Net web application in which several WCF services are being used. At client level, I am creating channel factory mechanism to invoke service operations. Right now, I have created an assembly having classes used for channel factory creation code for every service. As per my assumption this is some sort of facade pattern. Please help me to find a better approach or any design pattern, which I can use here.

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• Javascript regular expression pattern (.+?)

  - by webzide

  Deal experts, I am kinda new to this Regex thing. When I was analyzing some codes, I frequently come across the pattern .+? or (.+?) I can't seem to find the meaning of this pattern using my noobish deductive reasoning.

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• awk: access captured group from line pattern

  - by rampion

  If I have an awk command pattern { ... } and pattern uses a capturing group, how can I access the string so captured in the block?

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• value from resource bundle as pattern in formatDate

  - by binary_runner

  I want to read pattern for JST formatDate also from resource bundle but this naive approach does not working, what I'm doing wrong ? in com/company/MyPortlet.properties is this key: company.date.format = yyyy-MM-dd HH:mm:ss In page I have: <fmt:setBundle basename="com.company.MyPortlet"/> <fmt:formatDate value="${date}" pattern="${company.date.format}" />

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• Example of Singleton pattern

  - by Supereme

  Hi, Can anybody tell me a good example of Singleton pattern? Also I've one doubt to ask, Is the following scenario is that of singleton pattern: When we have many printers connected in LAN but only one printer queue?

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• My User control belonging to which Design Pattern??

  - by prashant

  Hello, I am creating a reusable component in C#.net. For that i have started a Control Library project and added a Control. Class MyControl : Control{} My user control just displays some images which will be used in many Windows Applications. Can you please tell me which design pattern i am using here. I am unable to decide which pattern they belongs. Thanks

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