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  • Fact table with multiple facts

    - by Jeff Meatball Yang
    I have a dimension (SiteItem) has two important facts: perUserClicks perBrowserClicks however, within this dimension, I have groups of dimensions based on an attribute column (let's call the groups AboveFoldItems, LeftNavItems, OnTheFlyItems, etc.) each have more facts that are specific to that group: AboveFoldItems: eyeTime, loadTime LeftNavItems: mouseOverTime OnTheFlyItems: doesn't have any extra, but may in the future Is the following fact table schema ok? DateKey SessionKey SiteItemKey perUserClicks perBrowserClicks eyeTime loadTime mouseOverTime It seems a little wasteful since only some columns pertain to some dimension keys (the irrelevant facts are left NULL). But... this seems like it would be a common problem, so there should be a common solution for this, right?

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  • Get the Grid data in ColumnHeaderClick

    - by plotnick
    Sorrry guys, I'm stuck here. I have a few grids, I also have CollectionViewSource objects associated with those grids. Now, I'm trying to apply CollectionViewSource.SortDescriptions in ColumnHeaderClick method, and now I have to define almost the same method for each grid. But the only thing I really need is to obtain in which Grid is happenning. How to get that, I have no idea. Help me please. VisualTreeHelper.GetParent didn't work.

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  • API for displaying graphs in a web app?

    - by Rosarch
    I have graphs (nodes/arcs) that I want to display to the user. I need to be able to capture the event of a user clicking on a node. Something like Google Charts API's Simple Org Chart would be great, but it looks like it only supports trees. What other service can I use? Or should I hack something ugly together using Google Charts?

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  • JSF Open new window and display bean data

    - by JSFPRINTER
    I am running JSF 2.0 and the latest version of Primefaces 2.2RC1 I believe. I am trying to create a printer friendly window. When the user clicks on a p:commandLink I want a new window to open and display a xhtml file I have named printView.xhtml. Now I can get the window working fine using JavaScript window.open but when I open the new window it will not render any values it just displays everything as #{myBean.value}. Does anyone know how to properly open a window and extend the current scope of the application into that window so I can call all of my managed beans properly and display the values etc. etc.

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  • NHibernate Many to Many delete all my data in the table

    - by Daoming Yang
    I would love to thank @Stefan Steinegger and @David helped me out yesterday with many-to-many mapping. I have 3 tables which are "News", "Tags" and "News_Tags" with Many-To-Many relationship and the "News_Tags" is the link table. If I delete one of the news records, the following mappings will delete all my news records which have the same tags. One thing I need to notice, I only allowed unique tag stored in the "Tag" table. This mapping make sense for me, it will delete the tag and related News records, but how can I implement a tagging system with NHibernate? Can anyone give me some suggestion? Many thanks. Daoming. News Mapping: <class name="New" table="News" lazy="false"> <id name="NewID"> <generator class="identity" /> </id> <property name="Title" type="String"></property> <property name="Description" type="String"></property> <set name="TagsList" table="New_Tags" lazy="false" inverse="true" cascade="all"> <key column="NewID" /> <many-to-many class="Tag" column="TagID" /> </set> </class> Tag Mapping: <class name="Tag" table="Tags" lazy="false"> <id name="TagID"> <generator class="identity" /> </id> <property name="TagName" type="String"></property> <property name="DateCreated" type="DateTime"></property> <!--inverse="true" has been defined in the "News mapping"--> <set name="NewsList" table="New_Tags" lazy="false" cascade="all"> <key column="TagID" /> <many-to-many class="New" column="NewID" /> </set> </class>

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  • querying larg text file containing JSON objects.

    - by Maciek Sawicki
    Hi, I have few Gigabytes text file in format: {"user_ip":"x.x.x.x", "action_type":"xxx", "action_data":{"some_key":"some_value"...},...} each entry is one line. First I would like to easily find entries for given ip. This part is easy because I can use grep for example. However even for this I would like to find better solution because I would like to get response as fast as possible. Next part is more complicated because I would like to find entries from selected ip and of selected type and with particular value of some_key in action_data. Probably I would have to convert this file to SQL db (probably SQLite, because it will be desktop APP), but I would ask if there are exists better solutions?

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  • Packing differently sized chunks of data into multiple bins

    - by knizz
    EDIT: It seems like this problem is called "Cutting stock problem" I need an algorithm that gives me the (space-)optimal arrangement of chunks in bins. One way would be put the bigger chunks in first. But see how that algorithm fails in this example: Chunks Bins ----------------------------- AAA BBB CC DD ( ) ( ) Algorithm Result ----------------------------- biggest first (AAABBB ) (CC ) optimal (AAACCDD) (BBB) "Biggest first" can't fit in DD. Maybe it helps to build a table like this: Size 1: --- Size 2: CC, DD Size 3: AAA, BBB Size 4: CCDD Size 5: AAACC, AAADD, BBBCC, BBBDD Size 6: AAABBB Size 7: AAACCDD, BBBCCDD Size 8: AAABBBCC, AAABBBDD Size 10: AAABBBCCDD

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  • Subset and lagging list data structure R

    - by user1234440
    I have a list that is indexed like the following: >list.stuff [[1]] [[1]]$vector ... [[1]]$matrix .... [[1]]$vector [[2]] null [[3]] [[3]]$vector ... [[3]]$matrix .... [[3]]$vector . . . Each segment in the list is indexed according to another vector of indexes: >index.list 1, 3, 5, 10, 15 In list.stuff, only at each of the indexes 1,3,5,10,15 will there be 2 vectors and one matrix; everything else will be null like [[2]]. What I want to do is to lag like the lag.xts function so that whatever is stored in [[1]] will be pushed to [[3]] and the last one drops off. This also requires subsetting the list, if its possible. I was wondering if there exists some functions that handle list manipulation. My thinking is that for xts, a time series can be extracted based on an index you supply: xts.object[index,] #returns the rows 1,3,5,10,15 From here I can lag it with: lag.xts(xts.object[index,]) Any help would be appreciated thanks: EDIT: Here is a reproducible example: list.stuff<-list() vec<-c(1,2,3,4,5,6,7,8,9) vec2<-c(1,2,3,4,5,6,7,8,9) mat<-matrix(c(1,2,3,4,5,6,7,8),4,2) list.vec.mat<-list(vec=vec,mat=mat,vec2=vec2) ind<-c(2,4,6,8,10) for(i in ind){ list.stuff[[i]]<-list.vec.mat }

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  • In App Purchase Unique Identifying Data

    - by dageshi
    O.K so I'm writing a iPhone travel guide, you purchase a subscription to a travel guide for 3 months, it downloads a fairly hefty database and for 3 months that database gets updated weekly with new stuff. Now what I'd like to do is make the user enter their email address as a one off action before they purchase their first guide, for China say. The purpose for doing this is 1) To allow me to contact the user by email when they add a note/tip for a particular place (the app will allow them to send notes & information to me) 2) To Uniquely identify who has purchased the subscription so that if they wipe their device and reinstall the app they can plug the email address in and pickup their subscriptions again. Or so they can use the same subscription on another device they own. My concerns are 1) Will Apple allow the email method of restoring functionality to a second or restored device? 2) As long as I tell the user what I'm using their email address for (aka I won't sell it to anyone else and use it for X purposes) will it be o.k to ask for said email address? And as a side note, can I tack the devices unique id onto my server comms to track devices or is apple going to through a hissy fit about that as well?

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  • DMX Analysis Services question

    - by user282382
    Hi, I am have two mining models, both are time series. One is [Company_Inputs] and the other is [Booking_Projections]. What I want to do is use EXTEND_MODEL_CASES to join the results of [Company_Inputs] as the extended cases. So basically something like: Select Flattened PredictTimeSeries([Bookings], 1, 6, EXTEND_MODEL_CASES) FROM [Booking_Projections] Natural Prediction Join (Select Flattened PredictTimeSeries([Metric1], 1, 6) From [Company_Inputs]) AS T This code of course doesn't work, but the idea is to use the predictions made from [Company_Inputs] as cases for predicting future values of [Booking_Projections] If anyone has an idea of how I can accomplish this I would appreciate it very much.

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  • One intent is working, second is giving me a crash

    - by user1480742
    ok, so both intents receiver sides are on the same activite and they are sending from different ones....second one is not working, first one does, dont know why...all 3 activites are ok in manifest and all that //second intent on senders side public void onItemSelected(AdapterView<?> arg0, View users, int i, long l) { FILENAME = (adapter.getItem(i)).toString(); Bundle viewBag2 = new Bundle(); viewBag2.putString("profile_name", FILENAME); Intent b = new Intent(OptionsMenu.this, CoreActivity.class); b.putExtras(viewBag2); startActivity(b); } //second intent on receiver side private void Data_transfer() { Bundle gotbasket2 = getIntent().getExtras(); profileName = gotbasket2.getString("profile_name"); } //first (working intent) on senders side public void onClick(View v) { Bundle viewBag = new Bundle(); viewBag.putString("spinner_result", s); a.putExtras(viewBag); } //first (working intent) on receiver side private void Data_transfer() { // TODO Auto-generated method stub Bundle gotbasket = getIntent().getExtras(); x = gotbasket.getString("spinner_result"); } 06-26 20:22:09.787: D/AndroidRuntime(1802): Shutting down VM 06-26 20:22:09.787: W/dalvikvm(1802): threadid=1: thread exiting with uncaught exception (group=0x40015560) 06-26 20:22:09.847: E/AndroidRuntime(1802): FATAL EXCEPTION: main 06-26 20:22:09.847: E/AndroidRuntime(1802): java.lang.RuntimeException: Unable to start activity ComponentInfo{mioc.diver/mioc.diver.CoreActivity}: java.lang.NullPointerException 06-26 20:22:09.847: E/AndroidRuntime(1802): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1647) 06-26 20:22:09.847: E/AndroidRuntime(1802): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:1663) 06-26 20:22:09.847: E/AndroidRuntime(1802): at android.app.ActivityThread.access$1500(ActivityThread.java:117) 06-26 20:22:09.847: E/AndroidRuntime(1802): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:931) 06-26 20:22:09.847: E/AndroidRuntime(1802): at android.os.Handler.dispatchMessage(Handler.java:99) 06-26 20:22:09.847: E/AndroidRuntime(1802): at android.os.Looper.loop(Looper.java:123) 06-26 20:22:09.847: E/AndroidRuntime(1802): at android.app.ActivityThread.main(ActivityThread.java:3683) 06-26 20:22:09.847: E/AndroidRuntime(1802): at java.lang.reflect.Method.invokeNative(Native Method) 06-26 20:22:09.847: E/AndroidRuntime(1802): at java.lang.reflect.Method.invoke(Method.java:507) 06-26 20:22:09.847: E/AndroidRuntime(1802): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:839) 06-26 20:22:09.847: E/AndroidRuntime(1802): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:597) 06-26 20:22:09.847: E/AndroidRuntime(1802): at dalvik.system.NativeStart.main(Native Method) 06-26 20:22:09.847: E/AndroidRuntime(1802): Caused by: java.lang.NullPointerException 06-26 20:22:09.847: E/AndroidRuntime(1802): at mioc.diver.CoreActivity.Data_transfer(CoreActivity.java:189) 06-26 20:22:09.847: E/AndroidRuntime(1802): at mioc.diver.CoreActivity.onCreate(CoreActivity.java:88) 06-26 20:22:09.847: E/AndroidRuntime(1802): at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1047) 06-26 20:22:09.847: E/AndroidRuntime(1802): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1611) 06-26 20:22:09.847: E/AndroidRuntime(1802): ... 11 more

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  • array of structures, or structure of arrays?

    - by Jason S
    Hmmm. I have a table which is an array of structures I need to store in Java. The naive don't-worry-about-memory approach says do this: public class Record { final private int field1; final private int field2; final private long field3; /* constructor & accessors here */ } List<Record> records = new ArrayList<Record>(); If I end up using a large number ( 106 ) of records, where individual records are accessed occasionally, one at a time, how would I figure out how the preceding approach (an ArrayList) would compare with an optimized approach for storage costs: public class OptimizedRecordStore { final private int[] field1; final private int[] field2; final private long[] field3; Record getRecord(int i) { return new Record(field1[i],field2[i],field3[i]); } /* constructor and other accessors & methods */ } edit: assume the # of records is something that is changed infrequently or never I'm probably not going to use the OptimizedRecordStore approach, but I want to understand the storage cost issue so I can make that decision with confidence. obviously if I add/change the # of records in the OptimizedRecordStore approach above, I either have to replace the whole object with a new one, or remove the "final" keyword. kd304 brings up a good point that was in the back of my mind. In other situations similar to this, I need column access on the records, e.g. if field1 and field2 are "time" and "position", and it's important for me to get those values as an array for use with MATLAB, so I can graph/analyze them efficiently.

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  • Tweak Data in Doctrine Migration (say, by running some arbitrary queries)

    - by timdev
    I've got a migration that creates a couple of columns that act as foreign keys. In particular, I'm adding a creator_id and owner_id column to a model. These foreign keys indicate who created, and who currently owns, a particular kind of domain object. Users are managed by sfDoctrineGuardPlugin. What I'd like to do, for the purpose of the migration, is look up the (active) user with the lowest id, and default creator_id/owner_id to that. I don't see any particularly obvious/proper way to run arbitrary operations on the database during a migration. Does anyone know how?

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  • NSPredicate cause update editing to return NSFetchedResultsChangeDelete not NSFetchedResultsChangeUp

    - by Matthew Weiss
    I have predicate inside of - (NSFetchedResultsController *)fetchedResultsController in a standard way starting from the CoreDataBook example. NSPredicate *predicate = [NSPredicate predicateWithFormat:@"state=%@ && date = %@ && date < %@", @"1",fromDate,toDate]; [fetchRequest setPredicate:predicate]; This works fine however when editing an item, it returns with NSFetchedResultsChangeDelete not Update. When the main view returns, it is missing the item. If I restart the simulator the delete was not saved and the correct editing result is shown the the predicate working correctly. case NSFetchedResultsChangeDelete: [tableView deleteRowsAtIndexPaths:[NSArray arrayWithObject:indexPath] withRowAnimation:UITableViewRowAnimationFade]; break; I can confirm the behavior by commenting out the two predicate lines ONLY and then all works as it should correctly returning with the full set after editing and calling NSFetchedResultsChangeUpdate instead of NSFetchedResultsChangeDelete. I have read http://matteocaldari.it/2009/11/multiple-contexts-controllers-delegates-and-coredata-bug who reports similar behavior but I have not found a work around to my problem. I can

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  • How to parse json data in Python?

    - by backcross
    Please help me to parse this json in python. { "IT" : [ { "firstName" : "ajay", "lastName" : "stha", "age" : 24 }, { "firstName" : "Michiel", "lastName" : "Og", "age" : 35 } ], "sales" : [ { "firstName" : "Guru", "lastName" : "red", "age" : 27 }, { "firstName" : "Jim", "lastName" : "Galley", "age" : 34 } ] } How to parse this json in Python?Please help me

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  • SQl Server - Hierarchical Data

    - by JMSA
    I use SQL Server 2000. Suppose I have two tables like the following: Area ---------------------------------- ID| Name | HierarchyLevel ---------------------------------- 1 | World | 1 2 | America| 2 3 | Europe | 2 4 | Africa | 2 5 | USA | 3 and AreaHierarchy ------------------------ ID | ParentID | ChildID ------------------------ 1 | 1 | 2 2 | 1 | 3 3 | 1 | 4 4 | 2 | 5 where AreaHierarchy.ParentID and AreaHierarchy.ChildID are FKs of Area.ID How can I find the nth parent of USA? Is it possible without looping? Probably not.

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  • How to structure a database with questions and answers?

    - by Andreas Johannessen
    Hi I am going to make a simple application that uses a database. I could need some guidance on how to structure it. I shall make question program. What I have in mind is. One table with questions One table with the difficulity of the question One table with the category of the question However, what do I do with the answers? Have them as seperate columns in the question-table? It sounds like a bad practice.(Also, where do I have the correct answer) Each question will have 5 answers where only one of them is correct.

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  • SQL Server Cursor data as result of stored procedure

    - by Dmitry Borovsky
    Hello, I have a stored procedure DECLARE cursor FOR SELECT [FooData] From [FooTable]; OPEN cursor ; FETCH NEXT FROM cursor INTO @CurrFooData; WHILE @@FETCH_STATUS = 0 BEGIN SELECT @CurrFooData AS FooData; INSERT INTO Bar (BarData) VALUES(@CurrFooData); FETCH NEXT FROM cursor INTO @CurrFooData; END; CLOSE cursor DEALLOCATE cursor But in result I have a lot of tables, not one. How can I return one table with 'FooData' column and all '@CurrFooData' rows?

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  • Hide labels in pie charts (MS Chart for .Net)

    - by grenade
    I can't seem to find the property that controls visibility of labels in pie charts. I need to turn the labels off as the information is available in the legend. Anyone know what property I can use in code behind? I tried setting the series labels to nothing Chart1.Series[i].Label = string.Empty; but the labels seem to show up anyway.

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  • How to bind a complex dictionary to a Gridview in asp.net?

    - by Mehdi
    I've used an early binding of a dictionary<string, string> to a gridview to show Urls Text and its HRef as key-value and it works like a charm. But since I want to replace the dictionary with this one : dictionary<string, LinkInfo> the binding goes wrong! Should I handle some events like as onItemDataBound or something? and the LinkInfo structure is: public struct LinkInfo{ public string href; public bool Enabled; }

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  • Binding Properties.Settings to Textbox fails

    - by user268098
    I would like to define a key & value in Settings.settings and bind the value by declaration in the XAML (not in the code behind by command). Here's what I've been trying in vain: Create a WPF project "Exp1" with Visual Studio Express 2010. Set one key named "TextFromSettings" to the value "Some Text from Setting". Add the attribute xmlns:p="clr-namespace:Exp1.Properties;assembly=Exp1" to the tag. Add Text="{Binding Path=TextFromSettings, Mode=TwoWay, Source={x:Static p:Settings.Default}}" to the tag Now, the preview window shows the text, however, the compiler fails: "Error 1 Cannot find the type 'Settings'. Note that type names are case sensitive." Where am I going wrong?

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