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• Does this data structure have a name? Sort of a "linked matrix"?

  - by Bob

  Let's say I wanted similar functionality to a doubly linked list but needed a matrix instead so that each node was structured like this: public class Node { Node Up, Down, Left, Right; object Value; } Is there a name for such a structure? I've looked through this Wikipedia listing of data structures but didn't see anything similar. Unless I just missed it.

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• Using Google Map Data API on the Android platform.

  - by Tarmon

  Hey Everyone, I was checking out the Google Maps Data API and I was wondering if I can follow their Java Development guide to use it on the Android platform? I want to display routes that I have created on Google Maps on the phone. Thanks, Rob

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• What's the difference between data model and object model?

  - by user198729

  CWM is data modeling UML is object modeling. Can someone explain the difference that a layman can understand?

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• What can I do with an Transformable attribute type in Core Data on the iPhone?

  - by dontWatchMyProfile

  What can I do with an Transformable attribute type in Core Data on the iPhone? Sounds cool. What is it good for? Are there good examples?

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• Can't get the JSONP workin' with WCF Data Services...

  - by SevilNatas

  What am I missing here? It seems from all that I read and watched, exposing JSON from a WCF Data Service should be as easy as adding the '[JSONPSupportBehavior]' directive in front of the Service Class. Problem is VS2010 doesn't recognize 'JSONPSupportBehavior'. Is there a reference I am missing? Seemed like, from alll the articles, it was supportted outta the box. TIA S.

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• How to use PHP Load Data Infile to replace the current copy of the table with the new one?

  - by NJTechGuy

  We get a new copy of data in a pipe-delimited text file from time to time. I have to refresh the table or in other words, replace the existing copy with that of the newly generated copy (output.txt). Any ideas are highly appreciated. Thank you..

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• How to recover data from a table, and store that into list?

  - by Wilhelm

  How can I get ALL the data from a table of my DB (mySQL) using hibernate, and store the output into List of Objects? I'll use this List, to populate a JTable.

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• What is a 'better' approach to query/save from server: DTO or Wcf Data Services?

  - by bonefisher

  From my perspective, the Data Services and their query approach is useful when querying simple object graphs from your server-side domain model. But when you want to query complex dependencies I couldn't create anything good out of it. The classic DTO approach is fine-grained and can handle everything, but the downside is that you have to create Dto classes for every type of server-request which is time consuming and you have to synchronize the Dto type with your domain entity/business logic.

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• ASP.NET Dynamic Data field value disappears in the browser.

  - by ProfK

  I have an ASP.NET Dynamic Data web application, with an entity called ActivationResource. One of the properties of this is a CellPhone field. Now, whenever I open a List or Details view of one of these entities, the cell phone number displays for a moment then disappears. Anyone have any ideas as to the cause of this mysterious behavior?

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• If I create a transient property in the model, isn't this managed by core data then?

  - by mystify

  Just to grok this: If I had a transient property, lets say averagePrice, and I mark that as "transient" in the data modeler: This will not be persistet, and no column will be created in SQLite for that? And: If I make my own NSManagedObject subclass with an averagePrice property, does it make any sense to model that property in the xcdatamodel file? Would it make a difference if I would simply create a property in my subclass and not model that in the entity? (I think: yes, it doesn't matter at all ... but not sure)

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• Good test database on Windows to play around with data retrieval operations in SQL?

  - by ovr

  I need a test database to practice joins and other kinds of data retrieval operations in SQL. What's a good free test database and RDBMS system to use on Windows?

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• Excel macro to change external data query connections - e.g. point from one database to another

  - by Rory

  I'm looking for a macro/vbs to update all the external data query connections to point at a different server or database. This is a pain to do manually and in versions of Excel before 2007 it sometimes seems impossible to do manually. Anyone have a sample? I see there are different types of connections 'OLEDB' and 'ODBC', so I guess I need to deal with different formats of connection strings?

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• How to write binary data to a usb flash drive or floppy?

  - by Alon

  Hi I need to write my own binary raw data to a flash drive (like a disk on key) or a floppy using C#. The result will be my custom file system from my program. Any ideas? Thank you.

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• Learning SQL & Microsoft Data Services stack - Where to start?

  - by Jim

  I'm trying to learn the Microsoft data / service stack. I want to build a database in SQL Azure and expose it to a c# client application. I've never worked with any SQL database technology. Looking online, everything just seems so confusing -- too many technologies, hard to tell what's new vs what's old. What's the latest technologies to look at, and what (books?) should I be reading?

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• Which data structures and algorithms book should I buy?

  - by Hei

  I know C and C++ and I have some experience with Java, but I don't know too much about Algorithms and Data Structures. I did a search on Amazon, but I don't know what book should I choose. I don't want a book which put its basis only on the theoretic part; I want the practical part too (probably more than the theoretical one :) ). I don't want the code to be implemented in a certain language, but if is in Java, probably I would happier. :)

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• Can anybody give me a complete list of data structure supported in Java(not in util package)?

  - by Kavin

  I want to know what kinds of data structure in Java and not in the util package? For example: Hashmap, Collection, Set. Please give me a list of them as many as possible. Thank you

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• R question. Using lappy on a data.frame and creating new variables w/ output.

  - by Michael

  Hello, I have 13 quantitative variables in a data.frame (called 'UNCA'). The variables are named q01_a, q01_b, ...q01_m. I want to create 13 new variables that have the same values but are coded as a factor. I would like to name these 13 new variables q01_a.F, q01_b.F, ...q01_m.F. Any help would be greatly appreciated!

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• Are there free, low cost, or open source tools for matching name/address data?

  - by luiscolorado

  This question is related to Tools for matching name/address data. There is a number commercial tools provided by SAS, Oracle, Microsoft, etc., that allow to de-duplicate or merging names of individuals or companies coming from multiple sources. However, after reading the answers to the question mentioned before, I wondered why a seemingly interesting problem didn't receive any answers mentioning open source projects that could tackle the problem. Are you aware of any open source projects or algorithms to implement the so called "record linking", "record merging", or "clustering"?

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• iPhone - is there any way to look at the core data store for a live app?

  - by jtrim

  I've got a live app on the app store that's producing some strange results when the user upgrades versions that I can't reproduce in my dev environment. Does anyone know of a way to inspect the core data store of a live iPhone app?

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• Which is the best data-warehousing tool to learn in the present market?

  - by uma

  I am graduating soon in electrical engineering. I would like to learn a data-warehousing tool. Which of the following would you suggest I learn to help me advance my career, bearing in mind I don't have a computer science degree? business objects; informatica; hyperion; datastage cognos

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• What is the most popular generic collection data structure library for C?

  - by Tom Dalling

  I'm looking for a C library that provides generic collection data structures such as lists, associative arrays, sets, etc. The library should be stable and well tested. I'm basically looking for something better than the crappy C standard library. What C libraries fit this description? EDIT: I'd prefer that the library was cross-platform, but failing that, anything that works on Mac/Linux.

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• Can I do an ASP.NET Dynamic Data project against a Sybase database?

  - by theog

  Or must it be a SQL Server database? If I'm reading the documentation right, as long as I use Entity Framework and not Linq to SQL, I can go against a Sybase data source. But I'm not certain...

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• How to treat RAM data as if it was a real file?

  - by Ole Jak

  So I have some temp data in my prorram (in RAM) I want to somehow make it seem as it is file (for example for sending it into another program which takes a file link as argument)? Is it possible? How to do such thing?

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• What is the best data-structure for storing elements which will be retrieved only once and then dele

  - by Jay

  I want to design a data-structure for storing elements, which will be retrieved only once after insertion and will be deleted after that. I can't use a stack or queue as the order of retrieval is not guaranteed. [EDIT] - I would like to use contigous memory (I would prefer to avoid doing malloc every now and then) and also I would prefer searchability also.

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• How do I get the application data path in Windows using C++?

  - by Brian T Hannan

  I looked all over the internet and there doesn't seem to be a decent solution that I could find. I want to be able to programmatically in C++ obtain the path "%ALLUSERSPROFILE%\Application Data" that explorer can translate into a real path. Can I do this without relying on third-party code?

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