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• Given a 1TB data set on disk with around 1KB per data record, how can I find duplicates using 512MB

  - by user288609

  There is 1TB data on a disk with around 1KB per data record. How to find duplicates using 512MB RAM and infinite disk space?

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• Unable to Export contents of Data table (with French formatted Numbers ) to XML

  - by Ananth

  I have a data Table with numbers formatted according to the current regional settings. ie ( in French decimal separators are ',' instead of '.' in English). I need to export it to XML. Numbers in XML needs to be formatted according to the current regional settings.But now numbers in XML are formatted in English.Is there any way to make the number…

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• iOS Core Data migration: moving something from an entity into a file

  - by Tim Sullivan

  I have a scenario where I'm moving the contents of a blob stored in a core data entity into a file. I need a way to export that data during a migration, where I know the entity that's being converted and save the blob to a file, writing the location of that file into the converted entity's appropriate attribute. I can't seem to find a way to do…

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• Saving private data

  - by rajatgoel

  Hi, Can anybody detail some approach on how to save private data in social websites like facebook, etc. They cant save all the updates and friends list in clear text format because of privacy issues. So how do they actually save it? Hashing all the data with user password so that only a valid session view it is one possibility. But I think…

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• What data type to use for variable lenght data for performance

  - by jiewmeng

  what data type shld i use for data that can be very short, eg. html link (think twitter), or very long eg. html blog post (think wordpress) i am thinking if i use varchar(4000), it maybe too short for a html formated blog entry? but if i use text, it will take up more space and is less efficient?

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• Investment advice data dump analysis

  - by portoalet

  For my year-end pet project, I'd like to analyze investment advices and their correlation to the stock market performance. The problem is, where do I get the dump of investment advice data (free) ? something like stackoverflow.com data dump will be nice. Or maybe it's easier to do distributed crawling and crawl the public finance webpages…

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• Defining your own Ord for a data type

  - by mvid

  I am attempting to make some data structures to solve a graph puzzle. I am trying to define an edge's comparison criteria, but I am not sure how. So far: data Edge = Edge (Set String) Bool How do I tell let the compiler know that I want edges to be declared equal if they have identical sets of strings, and not have equality have anything…

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• What are some commonly used source code check-in policies?

  - by rwmnau

  I'm curious what code review policies other development shops apply to their source code when it's checked into the source control repository. I'm setting up a TFS (Team Foundation) server, and I'd like to apply some check-in policies to start to stamp out bad practices. For example, I was thinking of starting with the following couple, so…

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• How to backup data stored with Core Data - iPhone app?

  - by Alex

  I'm using sqlite for the persistent store, so could I just upload the .sqlite file to, for example, Amazon S3 as a way of providing users with the ability to backup their app data? Then for restoring just download it back and replace the existing .sqlite file in the app's folder. Does anybody see any issues with that? Has anyone done it?…

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• C - How to implement Set data structure?

  - by psihodelia

  Is there any tricky way to implement a set data structure (a collection of unique values) in C? All elements in a set will be of the same type and there is a huge RAM memory. As I know, for integers it can be done really fast'N'easy using value-indexed arrays. But I'd like to have a very general Set data type. And it would be nice if a…

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• Data files from development machine to iOS device

  - by StoneBreaker

  My app has created a bunch of data files as development has progressed through the simulator. Their location is obtained by this function: NSString *pathInDocumentDirectory(NSString *fileName) { NSArray *documentDirectories = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, …

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• Which is the best license for my Open Source project?

  - by coderex

  I am a web developer, and I don't have enough knowledge about software licenses. I wish to publish some of my works, and I need to select licenses for them. My software product is free of cost. But I have some restrictions on the distribution/modification of the code. It's free of cost (but donations are acceptable ;-)). The source…

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• creating instance of labelled fields data type [closed]

  - by sisif

  How do I create an instance of a "labelled fields data type"? data InputData = InputData { events :: [Event], newResources :: [Resource] } myInputData :: InputData myInputData = ???

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• 1TB data on disk with around 1KB per data record. How to find duplicates using 512MB RAM and infinit

  - by user288609

  1TB data on disk with around 1KB per data record. How to find duplicates using 512MB RAM and infinite disk space?

  Read the article

• Import Data Wizard Does Not Like Data Type I Choose For A Column

  - by Haoest

  Does anybody else have this same problem, when you import data from Excel file to MSSQL Server 2005, if some column contains mostly numeric data, but even if you set the column type to varchar, the wizard fails to import those fields that fail to parse as numbers?

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• C Question: How to store data inside the executable file

  - by michael

  Hello all, complete newbie here, I need to find a way to store 250 KB of plain text numbers inside my program's executable file. Usually, I would put the data in a separate file and let the program read it while it is running, but that's not an option here. Instead, the program and the data need to be in one executable file. I have…

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• Merge two data frames together that have the same variable names and data types

  - by Brandon

  I have tried the merge function to merge two csv files that I imported. They both have the same variable names and data types but each time I run merge all that I get is an object that contains the names of the two data frames. I have tried the following: # ex1 obj <- merge(obj1, obj2, by=obj) # ex2 obj <- merge(obj1, obj2,…

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• How to manually add Core Data to project?

  - by marko

  E.g. what "Use Core Data for storage" checkbox option means when creating new Window or Navigation based project? How to add Core Data for Tab Bar Application? How to initialize managedObjectModel, managedObjectContext, persistentStoreCoordinator?

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• compressing non-binary data in java http client

  - by wo_shi_ni_ba_ba

  I plan to use java.util.zip to compress http post data when sending it from a java client to the server(java servlet in this case). is this the best approach for reducing data load? should I use gzip as the compression alg?

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• Delphi, read data from 3rd party data field

  - by donaldadams1951

  I am writing an application that needs to read a data field on another Delphi program and I do not have access to the source code of the 3rd party program. The data field contains the "foreign key" to a record I need to retrieve or create in my application. I would appreciate any links to knowledge or components that will help…

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• Isolate large amounts of data w/ jQuery

  - by Bry4n

  I work for a transit agency and I have large amounts of data (mostly times), and I need a way to filter the data using two textboxes (To and From). I found jQuery quick search, but it seems to only work with one textbox. If anyone has any ideas via jQuery or some other client side library, that would be fantastic.

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• Data Storage question

  - by Nano8Blazex

  Another newbie question: What's the best way to store data in a Cocoa application written in Obj-C? For example if I want to create a sort of "quizzer" that quizzes the user with pre-written (and user-written) questions? How would I store these questions and answers? Core Data? Thanks!

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• creating instance of labeled fields data type

  - by sisif

  how do i instance a "labeled fields data type"? data InputData = InputData { events :: [Event], newResources :: [Resource] } = where myInputData = ???

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• pass string or data of local file between viewcontrollers

  - by Jonathan

  In my last question i asked how to best send a string from one view controller to another, both which were on a navigation stack: http://stackoverflow.com/questions/2898860/pass-string-from-tableviewcontroller-to-viewcontroller-in-navigation-stack However I just realised I can either pass the path to the file in the app's…

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• Best ressources for learning Core Data?

  - by mystify

  I want to use Core Data on the iPhone. Do you know great tutorials, videos and ressources for learning Core Data in depth?

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