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  • Javascript : where are high level data structures?

    - by user355056
    Hi! I'm writing a client program for a game in Javascript but I'm new in Javascript world. Core Javascript lack of high level data structures. I've found code snippets on internet but I'm looking for a reference library (like commons-collection or google-collection in java world). I found this post: http://stackoverflow.com/questions/2523436/javascript-implementation-of-a-set-data-structure which refers to jshashtable and closure. Are they reference implementations? Do you know something else? Thanks

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  • Accessing CoreData relationships

    - by georgeliquor
    I have the following core data model with two entities: entity "item" which holds name, date, description and a to many relationship "image". image is optional. entity "image" holds url, name and relationship to one item. I load the executed Fetchrequest into this NSArray "entityArray" This is what I do to display my data in a UITableView for example to display title in main cell: NSManagedObject *object = (NSManagedObject *)[entityArray objectAtIndex:indexPath.row]; cell.textLabel.text=[object valueForKey:@"title"]; Now I have no clue how to access my relationship image ([object valueForKey:@"image"]), because it contains more than just a string.

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  • Zend DB inserting relational data

    - by Wimbjorno
    I'm using the Zend Framework database relationships for a couple of weeks now. My first impression is pretty good, but I do have a question related to inserting related data into multiple tables. For a little test application I've related two tables with each other by using a fuse table. +---------------+ +---------------+ +---------------+ | Pages | | Fuse | | Prints | +---------------+ +---------------+ +---------------+ | pageid | | fuseid | | printid | | page_active | | fuse_page | | print_title | | page_author | | fuse_print | | print_content | | page_created | | fuse_locale | | ... | | ... | | ... | +---------------+ +---------------+ +---------------+ Above is an example of my DB architecture Now, my problem is how to insert related data to two separate tables and insert the two newly created ID's into the fuse table at the same time. If someone could could maybe explain or give me a topic related tutorial. I would appreciate it!

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  • public (static) swap() method vs. redundant (non-static) private ones...

    - by Helper Method
    I'm revisiting data structures and algorithms to refresh my knowledge and from time to time I stumble across this problem: Often, several data structures do need to swap some elements on the underlying array. So I implement the swap() method in ADT1, ADT2 as a private non-static method. The good thing is, being a private method I don't need to check on the parameters, the bad thing is redundancy. But if I put the swap() method in a helper class as a public static method, I need to check the indices every time for validity, making the swap call very unefficient when many swaps are done. So what should I do? Neglect the performance degragation, or write small but redundant code?

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  • how should i echo the data

    - by Syom
    for example i want to generate html code, using some data from database. here is two ways of printing data <? echo '<li><img src="'.$row['image'].'" /></li>';?> or <? echo "<li><img src='$row[image]' /></li>";?> both of them are working. and if so, why people use the first method, if without spliting the row by . it works fine too.

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  • linq to sql update data

    - by pranay
    can i update my employee record as given in below function or i have to make query of employee collection first and than i update data public int updateEmployee(App3_EMPLOYEE employee) { DBContextDataContext db = new DBContextDataContext(); db.App3_EMPLOYEEs.Attach(employee); db.SubmitChanges(); return employee.PKEY; } or i have to do this public int updateEmployee(App3_EMPLOYEE employee) { DBContextDataContext db = new DBContextDataContext(); App3_EMPLOYEE emp = db.App3_EMPLOYEEs.Single(e => e.PKEY == employee.PKEY); db.App3_EMPLOYEEs.Attach(employee,emp); db.SubmitChanges(); return employee.PKEY; } But i dont want to use second option is there any efficient way to update data

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  • Save and Load Data on Today Extensions (iOS 8)

    - by Massimo Piazza
    Is it possible to save and load data on Today Extension using NSUserDefaults? After closing the Notification Center, the widget behaves like an app which is terminated, so any data results lost. How could I solve this issue? This is my code: NSUserDefaults *defaults; - (void)viewDidLoad { [super viewDidLoad]; defaults = [NSUserDefaults standardUserDefaults]; NSArray *loadStrings = [defaults stringArrayForKey:@"savedStrings"]; if ([loadStrings objectAtIndex:0] != nil) { [display setText:[NSString stringWithFormat:@"%@", [loadStrings objectAtIndex:0]]]; } if ([loadStrings objectAtIndex:1] != nil) { calculatorMemory = [NSString stringWithFormat:@"%@", [loadStrings objectAtIndex:1]].doubleValue; } } - (IBAction)saveData:(id)sender { NSString *displayString; NSString *memoryString; NSArray *saveStrings = [[NSArray alloc] initWithObjects: displayString, memoryString, nil]; defaults = [NSUserDefaults standardUserDefaults]; [defaults setObject:saveStrings forKey:@"savedStrings"]; [defaults synchronize]; }

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  • Unit testing with Data Access Layer

    - by chobo
    Hi, what is a good way to write unit tests with a LINQ to SQL DAL? Currently I am doing some database testing and need to create helper methods that access the database, but I don't want those methods in my main repo's. So what I have is two copies of the DAL, one in my main project and one in the Test project. Is it easier to manage these things if I create a separate project for the data layer? I'm not sure which way is a better way to approach this. If I do create a data layer project would I move all my repo's to that project as well? I'm not sure how to properly setup the layers. Thanks

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  • Get recursive data with sql server

    - by user228777
    I am trying to get recursive data. Following code returns all parents on the top and then the children. I would like to get data Parent 1 – his children then parent 2 - his children then parent3 – his children. How do I do this? USE Subscriber GO WITH Parent (ParentId, Id, Name,subscriberID) AS ( -- Anchor member definition SELECT A.ParentId,A.id, A.name,A.SubscriberId FROM Subscriber.Budget.SubscriberCategory AS A WHERE ParentId IS NULL UNION ALL -- Recursive member definition SELECT B.ParentId, B.id, B.name,B.SubscriberId FROM Subscriber.Budget.SubscriberCategory AS B INNER JOIN Parent AS P ON B.ParentId = P.Id ) -- Statement that executes the CTE SELECT parentId, id, name FROM Parent where subscriberID = '1C18093B-5031-42E4-9251-CEF69114365F' GO

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  • How to convert ms access data into pdf in vb.net

    - by user225269
    I want to convert the ms access data into a document so that the print function in vb.net will read it. Where do I start from here? Here is my form: http://screencast.com/t/MGU4N2UyNmY And here is the code for print preview. Try PrintPreviewDialog1.ShowDialog() Catch es As Exception MessageBox.Show(es.Message) End Try How do I incorporate the above code, to the code below so that there is something that can be seen when I hit the print button? Dim cn As New OleDbConnection("Provider=Microsoft.Jet.OLEDB.4.0;Data Source=C:\search.mdb") Dim cmd As OleDbCommand = New OleDbCommand("Select * from GH where NAME= '" & TextBox6.Text & "' ", cn) cn.Open() Dim rdr As OleDbDataReader rdr = cmd.ExecuteReader If rdr.HasRows Then rdr.Read() NoAcc = rdr("NAME") If (TextBox6.Text = NoAcc) Then TextBox1.Text = rdr("IDNUMBER") If (TextBox6.Text = NoAcc) Then TextBox7.Text = rdr("DEPARTMENT") If (TextBox6.Text = NoAcc) Then TextBox8.Text = rdr("COURSE") End If Please help,thanks

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  • Fork a process and send data to it inside Rails

    - by taro
    I'm making a Rails application. In the one action I need to spawn a long running process. This is not a problem. I can fork new process using spawn gem or some other. But some time after process has been spawned, user must be able to pass additional data to that process. Sure, I can fork process which will listen a UNIX socket, store socket address in the HTTP session and communicate with that process using drb protocol when user will require to pass new data to process. But I think it is not best solution and it will be a problem to deploy an application to the hosting. What is the easy way to do that?

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  • How to do visible EditText Data on Activity change

    - by user1249134
    HellO friends i am having edit text in my program and if i am writing some thing on there and if i am clciking on other option which will move to anothe activity and when i am coming back to same page the data of my edit text is clearing i dont want to clear data if i move on another page can any body tell me how to do it ..i am doing it by writing below code.. if(PresetQuestion.value=="true") { String note1=note.getText().toString(); note.setText(note1); } but its not woring i thing i am not doing correctly ...

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  • Long to timestamp for historic data (pre-1900s)

    - by Mike
    I have a database of start and stop times that have previously all had fairly recent data (1960s through present day) which i've been able to store as long integers. This is very simialr to unix timestamps, only with millisecond precision, so a function like java.util.Date.getTime() would be the value of the current time. This has worked well so far, but we recently got data from the 1860s, and the following code no longer works: to_timestamp('1-JAN-1970 00:00:00', 'dd-mon-yyyy hh24:mi:ss') + numtodsinterval(int_to_convert/(1000),'SECOND' ); This wraps the date and we get timestamps in the year 2038. Is there a way around this issue? All of the documentation i've looked at the documentation and timestamps should be able to handle years all the way back to the -4000 (BC), so i'm suspecting an issue with the numtodsinterval. Any ideas suggestions would be greatly appreciated.

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  • VS 2008 "Choose Data Source" wizard

    - by ELM
    Good Day, I'm using Visual Studio Professional 2008 SP 1. When I create a connection via the designer, the "Choose Data Source" dialog only lists the following data sources: Microsoft SQL Server Compact 3.5 Microsoft SQL Server Database File When I create a connection on the Server explorer the list is complete with : Microsoft SQL Server Compact 3.5, Microsoft SQL Server Database File, Microsoft SQL Server Compact, ODBC etc. Please help me out. I need to use SQL Server Compact. I have posted the same problem on the following thread with some screenshots: http://social.msdn.microsoft.com/Forums/en/vssetup/thread/906845c3-69e9-431a-ad07-7da2de684d33

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  • PHP find if file data is an image

    - by Christian Sciberras
    Imagine I have some file data in a variable $data. I need to determine whether it is an image or not. No need for details such as corrupt images etc. Firs thought would be getting the file mime type by looking at the magic number and then see whether "image" is in the mime type. No such luck, even if I have a "file extension to mime type" script, I don't have a reliable way to get mime from magic number. My next option was to have a reasonable list of image file magic numbers and consult them. However, it relatively difficult to find such magic numbers (gif for instance has different magic numbers, some of which could pretty rare - if memory serves me right). A better idea would be some linux program which can do this kind of thing. Any ideas? I'm running RHEL and PHP 5.3. I've got root access - ie able to install stuff if needed. - Chris.

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  • Looking for a mobile platform to view vector data and use it like a simple map

    - by Orchestrator
    I would like to develop or use an existing platform that will allow me to view custom vector data and use it as a map on mobile phones such as Android/IPhone (Maybe even WP7). I'm hoping that there's already a good infrastructure for what I need so I would not need to develop a whole infrastructure by myself. In Conclusion - Is there any existing platform that may answer my needs? If not, how would you guys suggest I should begin? How should I save my vector data? How could I read it? Should I view it with a graphics engine like OpenGL? Is there any chance this solution could be cross-platform? I know that it's possible since it was already done with apps like Waze. And it works the same on iOS and Android. Thanks!

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  • Modify input stream data on the fly

    - by Frizi
    I would like to implement a std::stream modifier/parser, that is doing data manipulation on the fly. Is it possible to create it in form of stream manipulator? For example, i want to strip all the line comments (from any // to the end of line) out of the stdin and pass it to stdout. string str; istream strippingCin = cin >> stripcomments; while(strippingCin.good()) { strippingCin >> str; cout << str; } There may be also a large file input instead of cin, so i don't want to load full stream data into memory at once. Is it possible without writing my own stream class? Maybe is there another route i should take instead?

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  • PDO:sqlite doesnt INSERT data, yet no error

    - by Phonethics
    try { $res = $db-exec($sql); if ($res === FALSE) { print_r($db-errorInfo()); die(); } } catch(PDOException $e) { die($e-getCode().':'.$e-getMessage()); } catch(Exception $e) { die($e-getCode().':'.$e-getMessage()); } No error info, and neither does it get caught as an exception. Yet $res is FALSE and no data gets inserted. Array ( [0] => ) But when I echo $sql and enter that query in SQLiteManager, it works inserting the data.

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  • Read data from an Android USB attachment

    - by Mark
    Is there anyway to read data from an attachment through the USB port on an Android device? In particular, an EKG. Most the work can be done by the hardware of the device to simplify the output to a single number, a voltage reading. If its not possible, what about modifying an accessory that can already communicate with an android device? Thinking of devices that attach to android phones, what about sending the data as an audio signal to be read as the microphone from a headset and then analyzing the audio signal to convert it to a number that can be used to display a value. Any ideas on how to make this work?

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  • problems with inserting data in database

    - by jannes braet
    $message=$_POST['answer']; $message=nl2br($message); $message=strip_tags($message, '<p><a><b><i><strong><em><code><sub><sup><img><ul><ol><li>'); $message = mysql_real_escape_string($message); $user=$_SESSION['SESS_MEMBER_ID']; $qry="INSERT INTO forum_rules (message,author,date) VALUES ($message,$user,'".date("Y-m-d H:i:s")."')"; $result=mysql_query($qry) or die(mysql_error()); if (!$result) { echo "error inserting data into database"; } else { ... } this codes always outputs error inserting data into database and i don't see what i'm doing wrong. i hav also tried to do it without the date part but that didn't work tho. can someone please tell me what i'm doing wrong here

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  • Exporting MS SQL Schema and Data

    - by stringo0
    I'm used to MySQL and PHPMyAdmin - I had to switch over to MSSQL for an ASP.net project, and I'm having tons of trouble. I'm using the express version of SQL 2008, with SQL Server Management Studio. The following are 2 questions I've been struggling with for a while: 1) How do I export the DB schema for the database? The table structure, etc.? 2) How do I export all the data in the database? Ideally I'd like to have a .sql file that can be run wherever I need the schema or data duplicated, for example a co-worker's computer for a shared project, or online when the project is being hosted. Thanks!

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  • Rails modeling for a user

    - by Trevor Hartman
    When building a rails app that allows a User to login and create data, is it best to setup a belongs_to :user association on every single model? For example, let's say a user can create Favorites, Colors and Tags. And let's say Favorites has_many :tags and Colors also has_many :tags. Is it still important for Tags to belong_to :user assuming the User is the only person who has authority to edit those tags? And a similar question along the same lines: When updating data in FavoritesController, I've come to the conclusion that you perform CRUD operations by always doing something like User.favorites.find(params[:id].update_attributes(param[:favorite]) so that they can definitely only update models that belong to them. Right?

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