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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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• 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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• 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 do I implement graphs and graph algorithms in a functional programming language?

  - by brad

  Basically, I know how to create graph data structures and use Dijkstra's algorithm in programming languages where side effects are allowed. Typically, graph algorithms use a structure to mark certain nodes as 'visited', but this has side effects, which I'm trying to avoid. I can think of one way to implement this in a functional language, but it basically requires passing around large amounts of state to different functions, and I'm wondering if there is a more space-efficient solution.

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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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• 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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• 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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• 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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• 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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• 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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• 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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• 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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• 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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• 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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• 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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• 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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• 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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• CS Majors: Hardest concept(s) you learned in school?

  - by Mark Lubin

  For the CS majors out there what were the hardest CS classes or concepts that you learned in your undergraduate schooling? Did you find once you learned the basics,(data structs, OOP fundamentals, discrete math, pointers, recursion, etc) the rest followed naturally or did you hit a wall at any point in your higher classes like OS'es and Compilers? Thanks for the input!

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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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• 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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• 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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• How can we send a large size of data (>2038 char) from client to Server using ajax?

  - by Dilip

  How can we send a large size of data (2038 char) from client to Server using ajax? I like to send an array of key-pair values of size more than 10KB. I am currently using cookies, is there any other prefered way by which we can send it through an Ajax Call.

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