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  • software/languages for online structured data collection from (human) clients

    - by Ben
    I need to develop a web interface to collect and validate a range of data from many of my organization's clients. This isn't a single form, but a collection of forms with interdependencies (i.e., field X on form Y is needed if field A was equal to C on form B), and variable length lists (please provide the details for all Xs in your possession). I had a look at the marketing on Microsoft InfoPath and Adobe LiveCycle, but I get the impression that they're principally electronic forms solutions rather than data collection tools. (e.g., If a user has entered their address once, they should never have to see it on a form again). Any suggestions of good tools, applications or domain-specific languages?

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  • Add Core Data Index to certain Attributes via migration

    - by steipete
    For performance reasons, i want to set the Indexed Attribute to some of my entities. I created a new core data model version to perform the changes. Core Data detects the changes and migrates my model to the new version, however, NO INDEXES ARE GENERATED. If I recreate the database from scratch, the indexes are there. I checked with SQLite Browser both on the iPhone and on the Simulator. The problem only occurs if a database in the prior format is already there. Is there a way to manually add the indexes? Write some sql for that? Or am I missing something? I did already some more critical migrations, no problems there. But those missing indexes are bugging me. Thanks for helping!

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  • Relationship Modelling in Core Data

    - by Stevie
    Hi there, I'm fairly new to Objective C and Core Data and have a problem designing a case where players team up one-on-one and have multiple matches that end up with a specific result. With MySQL, I would have a Player table (player primary key, name) and a match table (player A foreign key, player B foreign key, result). Now how do I do this with Core Data? I can easily tie a player entity to a match entity using a relationship. But how do I model the inverse direction for the second player ref. in the match entity? Player Name: Attribute Match: Relationship Match Match Result: Attribute PlayerA: Relationship to Player (<- Inverse to Player.Match) PlayerB: Relationship to Player (<- Inverse to ????) Would be great if someone could give me an idea on this! Thanks, Stevie.

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  • Saving data so it can be loaded locally

    - by Thomas Joos
    hi guys, i'm working on iphone application which needs to run offline at an exhibition. It should present data, stored local because there is no internet at the booth. Still, to easily have content updates it should be able to update it's content once connected to internet. It's quite some data ( around 300 full lines of text ) and I want it to be loaded, stored and visualized as optimized as possible. What's the best way to load in content once connected and how should I store it on the device?

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  • php 5.3.2 not throwing exceptions

    - by tipu
    I'm attempting to throw an exception using php 5.3.2 and it is giving me the following error: Parse error: syntax error, unexpected T_THROW I am attempting to throw an exception the following way: throw new Exception('Property ' . $name . ' doesn\'t exist in class Index', ''); Edit: I also tried throw new Exception('Property ' . $name . ' doesn\'t exist in class Index'); it didn't change the error I was getting. The complete method: public function __get($name) { if(property_exists($this, $name) throw new Exception('Property ' . $name . ' doesn\'t exist in class Index'); return $this->$name; }

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  • Client/JS Framework for "Unsaved Data" Protection?

    - by Kevin Dostalek
    Hey all- we have a typical web application that is essentially a data entry application with lots of screens some of which have some degree of complexity. We need to provide that standard capability on making sure if the user forgets to click the "Save" button before navigating away or closing their browser they get a warning and can cancel (but only when there is unsaved or dirty data). I know the basics of what I've got to do-- in fact I'm sure I've done it all before over the years (tie in to onbeforeunload, track the "dirty" state of the page, etc...) but before I embark on coding this YET AGAIN, does anyone have some suggestions for libraries already out there (free or otherwise) that will help out? Thanks!

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  • getting detailed information about structured exceptions

    - by Martin
    My Visual C++ application is compiled with /EHA option, letting me catch structured exceptions (division by zero, access violation, etc). I then translate those exceptions to my own exception class using _set_se_translator(). My goal is to improve our logging of those types of exceptions. I can get the type of exception from the EXCEPTION_RECORD structure, and the exception address. I would like to be able to gather more information, like the source file/location where the exception is thrown, the call stack, etc. Is that possible? I do create an exception minidump on structured exceptions - is there a tool to automatically get the call stack from that?

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  • data binding on properties confusion

    - by Xience
    I have a wpf tabitem whose data context is set to my object 'Product'. All the controls on this form get their data from 'Product' object. I have a listview whose ItemsSource property is set to a list in my object 'Product.DetailsList'. Listview columns are bound to object properties in 'Product.DetailsList' Up till here everything works fine. Now I need to bind some of the columns in my listview to the properties in my datacontext object i.e.'Product'. Can someone tell me how can i achieve this?

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  • UnitTest ExpectedException with multiple Exceptions

    - by masterchris_99
    I want one TestMethod for multiple exceptions. The Problem ist that the Testmethod stops after the first thrown exception. I know that I can do something like that: try { sAbc.ToInteger(); Assert.Fail(); // If it gets to this line, no exception was thrown } catch (ArgumentException) { } But I want to use the following code-base: [TestMethod, ExpectedException(typeof(ArgumentException), "...")] public void StringToIntException() { sAbc.ToInteger(); // throws an exception and stops here sDecimal.ToInteger(); // throws theoretically a exception too... } And I don't want to create one testmethod for each possible exception like that: [TestMethod, ExpectedException(typeof(ArgumentException), "...")] public void StringToIntException() { sAbc.ToInteger(); } [TestMethod, ExpectedException(typeof(ArgumentException), "...")] public void StringToIntException() { sDecimal.ToInteger(); }

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  • Ajax data two-way data binding strategies?

    - by morgancodes
    I'd like to 1) Draw create form fields and populate them with data from javascript objects 2) Update those backing objects whenever the value of the form field changes Number 1 is easy. I have a few js template systems I've been using that work quite nicely. Number 2 may require a bit of thought. A quick google search on "ajax data binding" turned up a few systems which seem basically one-way. They're designed to update a UI based on backing js objects, but don't seem to address the question of how to update those backing objects when changes are made to the UI. Can anyone recommend any libraries which will do this for me? It's something I can write myself without too much trouble, but if this question has already been thought through, I'd rather not duplicate the work.

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  • DataGridView bound to a Dictionary and updated with a thread

    - by Manjoor
    I have a Dictionary binded to DataGridView by using following sample code. http://stackoverflow.com/questions/854953/datagridview-bound-to-a-dictionary Please see the above question first The diffrence is that i am updating dictionary from a thread. (Event handler of another class). My Event handler is as below static void f_PriceChanged(Objet f, eventData e) { if (prices.ContainsKey(e.ItemText)) prices[e.ItemText] = e.price; else prices.Add(e.ItemText, e.price); } Not to mention the prices is declared as class level. I have modified the button code from original post as Button btn = new Button(); btn.Dock = DockStyle.Bottom; btn.Click += delegate { bl.Reset(); }; form.Controls.Add(btn); Internally the Dictionary is updated as expected but grid does not update. Clicking on button generate exception Collection was modified; enumeration operation may not execute What to do?

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  • LOAD DATA INFILE not working in mariadb

    - by Haseena
    Iam trying to migrate from mysql to mariadb. On this time I can face an issue with mariadb. When I can trying to load a data file into a table, it shows an error like : SQL Error (29): File 'C:/Documents and Settings/Administrator/Local Settings/Temp/SAMPLE/DATA_TEMP1351761841668/SampleFile0' not found (Errcode: 2) But the file already exists in the path.... Another one point is that the same command successfully works with MySQL. Is MariaDB has any permission issue? Login as Administrator. See below my query : load data infile "'C:/Documents and Settings/Administrator/Local Settings/Temp/SAMPLE/DATA_TEMP1351761841668/SampleFile0" into table SAMPLETABLE; When changing the path loke "C:/SampleFile0", its working properly. From Administrator folder it doesn't working. Can anyone help me in this regard??? Iam a newone in MariaDB.

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  • .NET 2.0 vs .NET 4.0 loading error

    - by David Rutten
    My class library is compiled against .NET 2.0 and works just fine whenever I try to load it as a plugin under the 2.0 runtime. If however the master application is running the .NET 4.0 runtime, I get an exception as soon as the resources need to be accessed: Exception occurred during processing of command: Grasshopper Plug-in = Grasshopper Could not find file 'Grasshopper.resources'. Stack trace: at UnhandledExceptionLogger.UnhandledThreadException(Object sender, ThreadExceptionEventArgs args) at System.Windows.Forms.Application.ThreadContext.OnThreadException(Exception t) at System.Windows.Forms.Control.WndProcException(Exception e) at System.Windows.Forms.ControlNativeWindow.OnThreadException(Exception e) at System.Windows.Forms.NativeWindow.Callback(IntPtr hWnd, Int32 msg, IntPtr wparam, IntPtr lparam) at System.Windows.Forms.SafeNativeMethods.ShowWindow(Handle Ref hWnd, Int32 nCmdShow) at System.Windows.Forms.Control.SetVisibleCore(Boolean value) at System.Windows.Forms.Form.SetVisibleCore(Boolean value) at System.Windows.Forms.Form.Show(IWin32Window owner) .... What's going on and how do I make my project load on all .NET Runtimes?

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  • Core Data Relationships in pre-populated SQLite database

    - by Cardinal
    Hi All, I'm new to Core Data. Currently I have following tables on hand: tbl_teahcer tbl_student tbl_course tbl_student_course_map ----------- ----------- ---------- ---------------------- teacher_id student_id course_id student_id name name name course_id teahcer_id And I'm going to make the xcdatamodel as below: Course Teacher ------ ------- name name teacher <<----------> courses students <<---| | Student | ------- | name |----->> courses My questions are as follows: As I'd like to create TableView for Cource Entity, is it a must to create the Inverse Relationship from Teacher to Course, and Student to Course? What is the beneit for having the Inverse Relationship? I got some pre-defined data on hand, and I'd like to create a SQLite storage for pre-populated source. How can I set up the relationships (both directions) in SQLite? Thank you for your help! Regards, Cardinal

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  • Convert Hexadecimal String to Data

    - by AriX
    Hi Stack Overflow, I have found a whole lot of different solutions to this problem, but not all of them work, and a lot of them seem somewhat hacky and inefficient. Basically I have a string of hexadecimal data (i.e. "55 AA 41 2A 00 94 55 AA BB BB 00 FF") which I would like to convert to raw data. What is the best way to do this? UPDATE: Vicky's solution worked great for me, but I changed it to work with hexadecimal strings that don't have spaces in between and changed the style a bit. int i = 0; char *hexString = "55AA412A009455AABBBB00FF" char *hexPtr = hexString; unsigned int *result = calloc(strlen(hexString)/2 + 1, sizeof *result); while (sscanf(hexPtr, "%02x", &result[i++])) { hexPtr += 2; if (hexPtr >= hexString + strlen(hexString)) break; } return result;

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  • Grails Duplicate Exception handling

    - by Srinath
    Hi, How to catch duplicate key exceptions in Grails . when trying to save existing integer for a unique column constraint, the error is generating while saving/updating a record . Also used try{ object.save(flush:true) }catch(org.springframework. dao.DataIntegrityViolationException e){ println e.message }catch(org.hibernate.exception.ConstraintViolationException ex){ println e.message }catch(Exception e){ println e.message } But unable to catch this issue . 23:41:13,265 ERROR [JDBCExceptionReporter:101] Duplicate entry '1' for key 2 23:41:13,281 ERROR [AbstractFlushingEventListener:324] Could not synchronize database state with session org.hibernate.exception.ConstraintViolationException: Could not execute JDBC batch update at org.hibernate.exception.SQLStateConverter.convert(SQLStateConverter.java:94) at org.hibernate.exception.JDBCExceptionHelper.convert(JDBCExceptionHelper.java:66) at org.hibernate.jdbc.AbstractBatcher.executeBatch(AbstractBatcher.java:275) at org.hibernate.engine.ActionQueue.executeActions(ActionQueue.java:266) at org.hibernate.engine.ActionQueue.executeActions(ActionQueue.java:168) at org.hibernate.event.def.AbstractFlushingEventListener.performExecutions(AbstractFlushingEventListener.java:321) at org.hibernate.event.def.DefaultFlushEventListener.onFlush(DefaultFlushEventListener.java:50) at org.hibernate.impl.SessionImpl.flush(SessionImpl.java:1027) Could you please share the solution to solve this .

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  • connection string reading data from excel in asp.net

    - by Greg
    Hello, I am trying to read data from excel file in asp.net. I have added the connection string to webConfig file: <add name="xls" connectionString="Provider=Microsoft.Jet.OLEDB.4.0;Data Source=HPM_DB.xls;Extended Properties=Excel 8.0"/> But it shows me an errormessage when I run this query: string query = "Select * from [IO_Definition$]"; IO_Definition is the name of the spreadsheet in my excel file. I also added the excel file to the App_Data folder of the website. The error is: The Microsoft Jet database engine could not find the object 'IO_Definition$'. Make sure the object exists and that you spell its name and the path name correctly. The thing is, when I write the absolute path of the excel file in the connectionString it does work. Is there anyway I can make it work without writing the absolute path? Thanks, Greg

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  • MQ EOL Data conversion

    - by lemotdit
    we are sending data trough MQ from a z/OS/CICS system to an AS400. Original encoding of the message is CCSID 500 with a MQSTR Format. The client application is getting the message with the CONVERT option and CCSID 819. Data is almost converted correctly except for the end of line caracter. Any idea? The z/OS is sending 0D (CR) as end of line caracter. If they had 0D+0A (CR+LF), CCSID automatically change from 500 to 437, and the end of line still ain't right on the client side.

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  • How do I do automatic data serialization of data objects in Haskell

    - by Adam Gent
    One of the huge benefits in languages that have some sort of reflection/introspecition is that objects can be automatically constructed from a variety of sources. For example in Java I can use the same objects for persisting to a db (with Hibernate) serializing to XML (with JAXB) or serializing to JSON (json-lib). You can do the same in Ruby and Python also usually following some simple rules for properties or annotations for Java. Thus I don't need lots "Domain Transfer Objects". I can concentrate on the domain I am working in. It seems in very strict FP like Haskell and Ocaml this is not possible. Particularly Haskell. The only thing I have seen is doing some sort of preprocessing or meta-programming (ocaml). Is it just accepted that you have to do all the transformations from the bottom upwards? In other words you have to do lot of boring work to turn a data type in haskell into JSON/XML/DB Row object and back again into a data object.

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  • Efficient data structure for fast random access, search, insertion and deletion

    - by Leonel
    I'm looking for a data structure (or structures) that would allow me keep me an ordered list of integers, no duplicates, with indexes and values in the same range. I need four main operations to be efficient, in rough order of importance: taking the value from a given index finding the index of a given value inserting a value at a given index deleting a value at a given index Using an array I have 1 at O(1), but 2 is O(N) and insertion and deletions are expensive (O(N) as well, I believe). A Linked List has O(1) insertion and deletion (once you have the node), but 1 and 2 are O(N) thus negating the gains. I tried keeping two arrays a[index]=value and b[value]=index, which turn 1 and 2 into O(1) but turn 3 and 4 into even more costly operations. Is there a data structure better suited for this?

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  • What is the best possible technology for pulling huge data from 4 remote servers

    - by Habib Ullah Bahar
    Hello, For one of our project, we need to pull huge real time stock data from 4 remote servers across two countries. The trivial process here, check the sources for a regular interval and save the update to database. But as these are real time stock data of more than 1000 companies, I have to pull every second, which isn't good in case of memory, bandwidth I think. Please give me suggestion on which technology/platform [We are flexible here. PHP, Python, Java, PERL - anyone of them will be OK for us] we should choose, it can be achieved easily and with better performance.

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  • Best data-structure to use for two ended sorted list

    - by fmark
    I need a collection data-structure that can do the following: Be sorted Allow me to quickly pop values off the front and back of the list Remain sorted after I insert a new value Allow a user-specified comparison function, as I will be storing tuples and want to sort on a particular value Thread-safety is not required Optionally allow efficient haskey() lookups (I'm happy to maintain a separate hash-table for this though) My thoughts at this stage are that I need a priority queue and a hash table, although I don't know if I can quickly pop values off both ends of a priority queue. I'm interested in performance for a moderate number of items (I would estimate less than 200,000). Another possibility is simply maintaining an OrderedDictionary and doing an insertion sort it every-time I add more data to it. Furthermore, are there any particular implementations in Python. I would really like to avoid writing this code myself.

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  • Core Data and Relationships

    - by alku83
    I have two objects, a Trip and a Place. A Trip represents a journey from one Place to another Place, ie. a Trip needs a fromPlace and a toPlace. So, this is a 1-to-2 relationship, but I need to know which is the "from" and which is the "to". I am not sure how to model this in Core Data. I have created two entities (Trip, Place), and now I want to setup the relationship(s) so I have a fromPlace and a toPlace. Do I need to add an extra field on the Place entity called isFrom, or similar? If this was in a database, I would just have a id column on the Place table, and then two columns in the Trip table - fromPlaceId and toPlaceId. How do I achieve something similar in Core Data?

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