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• Automating scraping of table data to XML

  - by thewinchester

  Problem I have a YQL query result that I'm trying to get converted and sort into a clean XML file. Background Being the pains that they are, information from the World Cup isn't freely available in an easy to reuse format. So, after a bit of finessing with YQL I have managed to liberate the required table rows which contain the data I'm after. The YQL query can be viewed at: http://query.yahooapis.com/v1/public/yql/ravingbeefsteak/worldcup2010groupliberator?diagnostics=true I'd like to now convert this information into XML, and being an absolute n00b I don't know where to start or what to look for. I'm also needing to do a find and replace on the data to get the URL's working as they should without manual changes, and hopefully an initial sorting of the data. If anyone can point me in the right direction of what I need to be doing to make my needs a reality it would be greatly appreciated.

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• Sorting NSSets of a core data entity - Objective-c

  - by ncohen

  Hi everyone, I would like to sort the data of a core data NSSet (I know we can do it only with arrays but let me explain...). I have an entity user who has a relationship to-many with the entity recipe. A recipe has the attributes name and id. I would like to get the data such that: Code: NSArray *id = [[user.recipes valueForKey:@"identity"] allObjects]; NSArray *name = [[user.recipes valueForKey:@"name"] allObjects]; if I take the object at index 1 in both arrays, they correspond to the same recipe... Thanks

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• How to persist a very abstract data type between sessions: PHP

  - by Greelmo

  I have an abstract data type that behaves much like stack. It represents a history of "graph objects" made by a particular user. Each "graph object" holds one or more "lines", a date range, keys, and a title. Each "line" holds a sql generator configured for a particular subset of data in my db. I would like for these "histories" to be available to users between their sessions. It will be in the form of a tab that reads something like "most recent graphs". What do you believe to be the best way to persist this type of data between sessions. This application could get rather large, so efficiency is a concern. Thanks in advance.

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• Protecting Data Feed for iPhone App

  - by Chris

  I am creating an App that pulls data from a file on my server. That file gets data from my database, based on GET values that are passed through the URL. I would like to keep this feed closed - that is, I don't want people finding the datasource and reading the data on their own. I considered sending an alphanumeric id along with the url string, but if they can find the URL that I am calling, then there won't be anything preventing them from grabbing that alphanumeric id also. I am looking for any ideas or experiences that might help me here. Thanks.

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• Suggest Cassandra data model for an existing schema

  - by Andriy Bohdan

  Hello guys! I hope there's someone who can help me suggest a suitable data model to be implemented using nosql database Apache Cassandra. More of than I need it to work under high loads and large amounts of data. Simplified I have 3 types of objects: Product Tag ProductTag Product: key - string key name - string .... - some other fields Tag: key - string key name - unique tag words ProductTag: product_key - foreign key referring to product tag_key - foreign key referring to tag rating - this is rating of tag for this product Each product may have 0 or many tags. Tag may be assigned to 1 or many products. Means relation between products and tags is many-to-many in terms of relational databases. Value of "rating" is updated "very" often. I need to be run the following queries Select objects by keys Select tags for product ordered by rating Select products by tag order by rating Update rating by product_key and tag_key The most important is to make these queries really fast on large amounts of data, considering that rating is constantly updated.

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• Interpolation of scattered data: What could I do?

  - by Simon

  Hi! I need your help. I'm working on a 3D chart in Java using Java 3D. It should be able to display a bunch of measured values. As measured, the data I get is scattered. This means I will have to interpolate the missing points in order to get my surface plotted nicely. I didn't study all that 3D-Geometry stuff yet and I don't know where to start. My idea is to triangulate the points to a surface and then, based on the triangulation, interpolate the missing points. (see this to have a rough idea of what I want to achieve) Does someone have experiences with the interpolation of scattered data? Is my approach the right one? If yes, what kind of data structures and algorithms will I need in order to triangulate my points cloud?

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• Functional data structures in C++

  - by drg

  Does anyone know of a C++ data structure library providing functional (a.k.a. immutable, or "persistent" in the FP sense) equivalents of the familiar STL structures? By "functional" I mean that the objects themselves are immutable, while modifications to those objects return new objects sharing the same internals as the parent object where appropriate. Ideally, such a library would resemble STL, and would work well with Boost.Phoenix (caveat- I haven't actually used Phoenix, but as far as I can tell it provides many algorithms but no data structures, unless a lazily-computed change to an existing data structure counts - does it?)

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• Looking for a Magnetic Card Reader with data storage

  - by Omar Sharif

  I am looking for a magnetic card reader with data storage of about 2 GB. This reader be placed in open under a shade, but would be exposed to temperatures from -5 C to 50 C. Job is to swipe customer loyalty cards issued to regular customers of a gas station. Each time they get gas filled, they will swipe their card, to mark their presence. Swiped data be stored in the reader. And on intervals be transferred to a PC lying in the office. The customer visits data be used to award some gifts or benefits to frequently visiting clients. Any ready-made solutions available ? Please advise. Omar

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• Core Data store corruption

  - by sehugg

  A handful of customers for my iPhone app are experiencing Core Data store corruption (I assume so, since the error is "Failed to save to data store: Operation could not be completed. (Cocoa error 259.)") Has anyone else experienced this kind of store corruption? I am worried since I aim to soon push an update which performs a schema migration, and I am worried that this will expose even more problems. I had assumed that the Core Data/SQLlite APIs use atomic operations and are immune to corruption except if the underlying filesystem experiences corruption. Is there a way to reduce/prevent corruption, or at least a good way to reproduce (I have been unsuccessful thus far).

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• Faking a dynamic schema in Core Data?

  - by Gouldsc

  From reading the Apple Docs on Core Data, I've learned that you should not use Core Data when you need a dynamic schema. If I wanted to provide the user the ability to create their own properties, in a core data model would it work if I created some "dummy" attributes like "custom decimal 1", "custom decimal 2", "custom text 1", "custom text 2" etc that the user could name and use for their own purposes? Obviously this won't work for relationships, but for simple properties it seems like a reasonable workaround. Will creating a bunch of dummy attributes on my entities that go unused by most users noticeably decrease performance for them? Have any of you tried something like this? Thanks!

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• creating managed objects using code in xcode & core-data

  - by themadpeacock

  New to objective-c xcode and core-data so sorry for the remedial question. I have set up a very simple data model: Entity1 and Entity2, both contain a single attribute (String) and a one-to-many relationship with the other. I want to scan Entity1 and depending on the results of the scan create one or more Entity2 objects that link to Entity1. How can I do this? I don’t understand how I create Entity2 type objects in code and how I would define the relationship to the Entity1 object they are related to. I come from a SQL programming background where inserting elements into the Entity2 table with the ID of the related Entiry1 entry is easy. I can’t get my head around the xcode core-data abstraction and would appreciate any help.

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• WPF data grid - Column Header not aligned with data rows

  - by Pawan

  Hi, I am using Datagrid in WPF. This is a very simple and basic implementation. I not using any styles. I created a simple datagrid : <dg:DataGrid x:Name="dg" > </dg:DataGrid> and populated it with data as: dg.ItemsSource = " H E L L O W O R L D!".Split(); Grid gets properly populated but the columnheader of the grid is drawn with some offset. Due to this my data and header are mis aligned. I tried searching for this over net but I haven't found anything. This seems to be a straightforward implementation which is working for everyone except me :(. Can anyone please tell me what might be going wrong? I have tried using different data sets and appyling some style to test this. Thanks in advance.

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• How to introduce custom primitive key types to WCF Data Services (Astoria)

  - by Artem Tikhomirov

  Hello. We use custom type to represent Identifiers in our project. It has TypeConvertor attached and it always helped with serialization. I've tried to use WCF Data Services to expose some data from our system, but faced a problem. Astoria framework do not recognize class as an entity even though I've decorated it with [DataServiceKey("Id")] attribute. If I change type of property to Guid - it totally works :(. How could teach WCF Data Services to understand this simple class?

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• What type of data is this JavaScript code!?

  - by SolidSnakeGTI

  Hello, Well, I'm completely new to JavaScript. Can you please tell me what type of data is this JavaScript code: var options = { sourceLanguage: 'en', destinationLanguage: ['hi', 'bn', 'fa', 'gu', 'kn', 'ml', 'mr', 'ne', 'pa', 'ta','te','ur'], shortcutKey: 'ctrl+g', transliterationEnabled: true }; I've reviewed JavaScript arrays, but it doesn't seem to be a traditional array. Still don't know if it's some kind of arrays or another data type!! Additionally, is there any way to set individual elements to that data type such as setting array elements individually. Thanks in advance

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• Google Toolbox For Mac with Core Data on iPhone results in error

  - by JaanusSiim

  I have set up my project for using Google Toolbox for Mac as described on official wiki. And everything is working as expected. For core data usage I have created a 'database' class that uses for final application SQLite storage (this is done based on Xcode template code). For unit tests I have created separate init method for 'database' to use in memory storage (storage url is [NSURL URLWithString:@"memory://store"] and type NSInMemoryStoreType). Without adding my model file (*.xcdatamodel) to unit tests target, test fail in expected place with message: executeFetchRequest:error: A fetch request must have an entity. If I add model file to the test target, then test is executed as expected (core data part looks OK), but after tests execution I get: RunIPhoneUnitTest.sh: line 123: 9487 Segmentation fault "$TARGET_BUILD_DIR/$EXECUTABLE_PATH" -RegisterForSystemEvents Command /bin/sh failed with exit code 139 This problem does not looks directly related to core data, but only happens if model file is added to target. Any pointers on resolving this issue would be appreciated!

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• Core Data vs SQLite 3

  - by Jason Medeiros

  I am already quite familiar with relational databases and have used SQLite (and other databases) in the past. However, Core Data has a certain allure, so I am considering spending some time to learn it for use in my next application. Is there much benefit to using Core Data over SQLite, or vice versa? What are the pros/cons of each? I find it hard to justify the cost of learning Core Data when Apple doesn't use it for many of its flagship applications like Mail.app or iPhoto.app - instead opting for SQLite databases. SQLite is also used extensively on the iPhone. Can those familiar with using both comment on their experience? Perhaps, as with most things, the question is deeper than just using one over the other?

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• Help Reading Binary Image Data from SQL Server into PHP

  - by Joe Majewski

  I cannot seem to figure out a way to read binary data from SQL server into PHP. I am working on a project where I need to be able to store the image directly in the SQL table, not on the file system. Currently, I have been using a query like this one: INSERT INTO myTable(Document) SELECT * FROM OPENROWSET(BULK N'C:\image.jpg', SINGLE_BLOB) as BLAH This works fine to actually insert the image into the table, but I haven't yet figured a way to retrieve it and get my image back. I am doing this with PHP, and ultimately will have to make a stored procedure out of it, but can anyone enlighten me on a way to get that binary data (varbinary(MAX)) and generate an image on the fly. I expected it to be simple to use a SELECT statement and add a content-type to the headers that indicated it was an image, but it's simply not working. Instead, the page will just display the name of the file, which I have encountered in the past and understand it to be an error with the image data.

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• iPhone: Best Method for Passing Data to and from a Server

  - by SAPNA

  I am developing an iPhone application that downloads data from a website. The website database is implemented in SQL and the site itself uses the classic ASP interface. I am unsure as to which method would be best for transferring data to and from the server. Both JSON and SOAP require XML processing and I'm not sure how that affects performance or which of those two is best. What would be the best method in general for data transfer given the server configuration we currently have? I very new to this field and I'm a bit confused. Any help would be appreciated.

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• Selecting Entity Data Model Laguage -- Visual C# source file generated even when i select VB

  - by Nickson

  Am adding an Entity Data Model to an ASP.NET website. When i Add New Item to the website and select ADO.NET Entity Data Model, am asked for the model name and language. I go a head and select Visual Basic as the language, the model is added and the site can compile with out any issues. however, the model it adds a ModelName.Designer.cs source file, instead of a ModelName.Designer.vb source file. am thinking this is strange as its happening with only one of my website. my other sites have .vb designer source file for their Entity Data Models. The site still compiles with out any errors but am afraid some thing is not right. any one experienced this?, is this normal behavior?

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• AIF or Data Migration Framework [AX 2012]

  - by Tito

  I was importing some entities to AX 2012 using AIF and consuming the web services through an C# ASP.Net application. I already made it for Customers,Vendors,Workers,Chart of Accounts and now starting General Journals. Some customization I could find a workaround using the AIF Document Service Wizard: Creating the DUNS number using a service for the DirDunsNumber table, later associating the customer with the new created DUNS Number. On the Products data migration will need a lot of customization like this. This month I heard the annoucement that there is this new framework (Data Migration Framework), still in beta version. I would like to know if the Data Migration Framework would cover all of these customizations ? What are the advantages of this new framework over AIF ?

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• cleaned_data() doesn't have some of the entered data

  - by SC Ghost

  I have a simple form for a user to enter in Name (CharField), Age(IntegerField), and Sex(ChoiceField). However the data that is taken from the Sex choice field is not showing up in my cleaned_data(). Using a debugger, I can clearly see that the data is being received in the correct format but as soon as I do form.cleaned_data() all sign of my choice field data is gone. Any help would be greatly appreciated. Here is the relative code: class InformationForm(forms.Form): Name = forms.CharField() Age = forms.IntegerField() Sex = forms.ChoiceField(SEX_CHOICES, required=True) def get_information(request, username): if request.method == 'GET': form = InformationForm() else: form = RelativeForm(request.POST) if form.is_valid(): relative_data = form.cleaned_data

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• How does jQuery .data() work?

  - by kazanaki

  My Javascript knowledge is pretty limited. Instead of asking several javascript questions I got the "message" from Stack overflow and started using jQuery right away in order to save me some time. However several times I do not undestand the "magic" behind jQuery and I would love to learn the details. I want to use .data() in my application. The examples are very helpful. I do not understand however WHERE these values are stored. I inspect the webpage with Firebug and as soon as .data() saves an object to a dom element, I do not see any change in Firebug (either HTML or Dom tabs). I tried to look at jQuery source, but it is very advanced for my Javascript knowledge and I lost myself. So the question is: Where do the values stored by jQuery.data() actually go? Can I inspect/locate/list/debug them using a tool?

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• SQL Server 2008 - Script Data as Insert Statements from SSIS Package

  - by Brandon King

  SQL Server 2008 provides the ability to script data as Insert statements using the Generate Scripts option in Management Studio. Is it possible to access the same functionality from within a SSIS package? Here's what I'm trying to accomplish... I have a scheduled job that nightly scripts out all the schema and data for a SQL Server 2008 database and then uses the script to create a "mirror copy" SQLCE 3.5 database. I've been using Narayana Vyas Kondreddi's sp_generate_inserts stored procedure to accomplish this, but it has problems with some datatypes and greater-than-4K columns (holdovers from SQL Server 2000 days). The Script Data function looks like it could solve my problems, if only I could automate it. Any suggestions?

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• Excel data connection - remove header row?

  - by ekoner

  The excel spreadsheet is connecting to SQL server 2005 using the connection string below: Provider=SQLOLEDB.1;Integrated Security=SSPI;Persist Security Info=True;Initial Catalog=XXXXXX;Data Source=XXXXXX;Extended Properties="HDR=No";Use Procedure for Prepare=1;Auto Translate=True;Packet Size=4096;Workstation ID=XXXXXX;Use Encryption for Data=False;Tag with column collation when possible=False It then pulls data from a view into Excel. The business user wants this information without a header row. This will allow her to review then save as a "headless" csv in SAGE file format. I attempted to alter the connection string by adding HDR=No but that hasn't worked. Additionally, I can't delete the header row. Deleting the content replaces the column names with "Column 1" etc. Any ideas appreciated!

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• WPF/.NET data access models - resource recommendations

  - by jasonk

  We're in the early design/prep phases of transferring/updating a rather large "legacy" 3 tier client-server app to a new version. We’re looking at doing WPF over Winforms as it appears to be the direction Microsoft is pushing development of the future and we’d like the maximize the life cycle/span of the apps. That said during the rewrite we’d like to make as many changes to our data access/presentation model to improve performance as much as possible up front as many. I’ve been doing some research along that vein but the vast majority of the resources I've found that discuss WPF focus only simple data tracking apps or focus on the very basics UI design/controls. The few items that even discuss data presentation are fairly elementary in depth. Are there any books/articles/recommended reading/other resources recommended for development related to large enterprise level business apps? Any “gotchas” that should/could be avoided? General advice to minimize the time underwater

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