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  • Java LinkedList iterator being exhausted prematurely

    - by Sujeet
    I am using LinkedList and retrieving an Iterator object by using list.iterator(). After that, I am checking it.hasNext(), real issue is while checking it.hasNext(), sometimes it returns false. I need help why this is happening, though I have elements in the list. Some code: public synchronized void check(Object obj) throws Exception { Iterator itr = list.iterator(); while(itr.hasNext()) { //This Line I get false.. though i have list size is 1 Item p = (Item)itr.next(); if(p.getId() == null) {continue;} if(p.getId().getElemntId() == obj.getId() || obj.getId() == 0 ) { p.setResponse(obj); notifyAll(); return; } } Log.Error("validate failed obj.getId="+obj.getId()+" **list.size="+list.size()*This shows 1*); throw new Exception("InvalidData"); }

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  • How do I tell if the ObjectDataSource OnSelected event was called for the selectmethod or selectcou

    - by itchi
    I have an object datasource that looks like this: <asp:ObjectDataSource ID="obdsList" runat="server" EnablePaging="True" SelectCountMethod="GetCountByID" SortParameterName="sortExpression" OldValuesParameterFormatString="original_{0}" SelectMethod="GetByID" TypeName="Services.Users" onselected="obdsList_Selected"> <SelectParameters> <asp:QueryStringParameter Name="ID" QueryStringField="ID" Type="Int32" /> </SelectParameters> </asp:ObjectDataSource> And a onselected event like this: protected void obdsList_Selected(object sender, ObjectDataSourceStatusEventArgs e) { } However, the event method is being called twice.. once with my returned list, and once with the returned Int32 count. If I want to cast e.ReturnValue to the return List how do I differentiate between the count and select methods? I can do a e.ReturnValue.GetType().ToString() but that seems like a hack.

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  • Javascript Pointers question with Dates

    - by Mega Matt
    I noticed this situation in my code (unfortunately), and was able to duplicate it in my own JS file. So I have this code: var date1 = new Date(); // today var date2 = date1; date2 = date2.setDate(date2.getDate() + 1); // what is date1? After this code executes, date1 is today's date + 1! This harkens back to my undergrad days when I learned about pointers, and I guess I'm a little rusty. Is that what's happening here? Obviously I've moved the assignment away from date1, and am only modifying date2, but date1 is being changed. Why is this the case? Incidentally, after this code executes date2 is a long number like 1272123603911. I assume this is the number of seconds in the date, but shouldn't date2 still be a Date object? setDate() should return a Date object... Thanks for the help.

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  • Mapping LINQ to SQL table to another very similar table without iterating through every one

    - by Daniel Coffman
    Apologies for the vague question. Here it is: I have a table object created by LINQ to SQL. I am copying entries from one table to an "archive" table that has all the columns of the original, plus a couple extra ones. It feels sloppy to iterate through every object and manually define the mapping like: foreach (oldTable in dbContextOldTables) { var newTable = new NewTable(); newTable.TableID = oldTable.ID; newTable.Title = oldTable.Title; ... (repeat for twenty columns) newTable.ColumnThatIsntInOldTable = "Data that will be the same for every row"; dbContext.NewTables.InsertOnSubmit(newTable); } dbContext.SubmitChanges(); Is there a clever way to do this?

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  • Rails easy shop

    - by ciss
    I have some question about data organization in my shop. So, after easy mind hacking i decide to create three models: Item, Property and PropertyType Item: id,property_id Property: id, data, property_type_id #(data, serialized object with something like what: {:color => "red", :price => 1000} PropertyType: id, data #(data, also serialized object with {:color => :string, :price => :fixnum}) So, does this good or bad idea? I predict what I can find some problems with validations. But I really need some fields created by user via admin-panel (now I'm talking about Item Properties, which can be changed in any time)

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  • Database Documentation with `SQL Doc 2`

    - by mehdi lotfi
    I use SQL Doc 2 for documentation my database. But this tools not support following expect : Add diagrams in documentation. Add Additional description for each object such as tables, columns and etc. Customize output format. Add custom link for each object. Add Analyze business description of created tables, columns and etc Some time need to explain records of each table such as records of literal tables. How Can support above request in SQL Doc 2? Do exists a tools for documentation database with above request?

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  • update_attributes with validations

    - by Timothy
    I have the following contrived example in Rails. I want to make sure the Garage model has at least one car with this. class Garage has_many :cars validate :at_least_one_car def at_least_one_car if cars.count == 0 errors.add_to_base("needs at least one car") end end end class Car belongs_to :garage end In my form I have a remove button that will set the hidden field _delete to true for an existing car. Let's say there is only one car object and I "delete" it in my form, if I do garage_object.update_attributes(params[:garage]), it will delete the car model and make the garage object invalid. Is there to a way to make it not update the attributes if it will make the model invalid?

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  • Compiler error when using abstract types

    - by Dylan
    I'm trying to implement a "protocol helper" trait that is responsible for matching up Prompts and Responses. The eventual goal is to have an object that defines the various Prompt and Response classes as subclasses of a sealed trait, then have a class that mixes in the ProtocolSupport trait for that Protocol object. The problem is that my current approach won't compile, even though I'm fairly sure it should. Here's a distilled version of what I've got: trait Protocol { type Response type Prompt <: BasePrompt trait BasePrompt { type Data def validate(response: Response): Validated[Data] } } trait ProtocolSupport[P <: Protocol] { def foo(prompt: P#Prompt, response: P#Response) = { // compiler error prompt.validate(response) } } The compiler doesn't like the response as an argument to prompt.validate: [error] found : response.type (with underlying type P#Response) [error] required: _4.Response where val _4: P [error] prompt.validate(response) [error] ^ This isn't very helpful.. it seems to say that it wants a P.Response but that's exactly what I'm giving it, so what's the problem?

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  • What's the best way to use hamcrest-AS3 to test for membership in an IList?

    - by Chris R
    I'm using Flex 3.3, with hamcrest-as3 used to test for item membership in a list as part of my unit tests: var myList: IList = new ArrayCollection(['a', 'b', 'c']).list; assertThat(myList, hasItems('a', 'b', 'c')); The problem is that apparently the IList class doesn't support for each iteration; for example, with the above list, this will not trace anything: for each (var i: * in myList) { trace (i); } However, tracing either an Array or an ArrayCollection containing the same data will work just fine. What I want to do is (without having to tear apart my existing IList-based interface) be able to treat an IList like an Array or an ArrayCollection for the purposes of testing, because that's what hamcrest does: override public function matches(collection:Object):Boolean { for each (var item:Object in collection) { if (_elementMatcher.matches(item)) { return true; } } return false; } Is this simply doomed to failure? As a side note, why would the IList interface not be amenable to iteration this way? That just seems wrong.

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  • how to check if entity already exists in database before inserting in doctrine?

    - by fayer
    whenever i insert a entity that already exists in database (i have a unique constraint on email) i get an error message on the screen. so i want to check if it already exists, if not i insert it. at the moment it looks like this: $q = Doctrine_Query::create() ->from('User u') ->where('u.email = ?', $email); $object = $q->fetchOne(); if( ! is_object($object)) { $user = new User(); $user-email = $email; $user->save(); } i wonder, if there an easier way to do this? thanks

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  • Google App Engine & Django Sandbox: Shell and Web seem to be using different datastores?

    - by tones
    I'm new to both Django and Google App Engine, and am using a sandbox in OSX10.6 with the GoogleAppEngineLauncher. I've got a basic "bookstore" application running from the tutorial in the OReilly "Programming Google App Engine" book. Here's the bug: If I add a new object to the datastore through the web interface, then it's readable through the web interface, but does not appear to exist if I query the datastore through the shell. Vice versa: If I add an object in the shell, then I can read it from the shell, but it doesn't appear in the web interface. Any thoughts or theories would be welcome. Thanks! =T=

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  • Choose between multiple options with defined probability

    - by Sijin
    I have a scenario where I need to show a different page to a user for the same url based on a probability distribution, so for e.g. for 3 pages the distribution might be page 1 - 30% of all users page 2 - 50% of all users page 3 - 20% of all users When deciding what page to load for a given user, what technique can I use to ensure that the overall distribution matches the above? I am thinking I need a way to choose an object at "random" from a set X { x1, x2....xn } except that instead of all objects being equally likely the probability of an object being selected is defined beforehand.

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  • Why do C# and Java require everything to be in a class?

    - by Javier Badia
    It seemed like this question should have been asked before, but searching found nothing. I've always wondered what's the point of making us put every bit of code inside a class or interface. I seem to remember that there were some advantages to requiring a main() function like C, but nothing for classes. Languages like Python are, in a way, even more object oriented than Java since they don't have primitives, but you can put code wherever you want. Is this some sort of "misinterpretation" of OOP? After all, you can write procedural code like you would in C and put it inside a class, but it won't be object oriented.

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  • Accessing Controls Values Before Finishing Page_Load

    - by userk
    Hi. I'm with a problem and want to know if someone can help me. I'm creating a table with some controls and I want to save all control values in every postback. As the controls are just defined after the page_load, I can't solve my problem this way: object o; protected void Page_Load(object sender, EventArgs e) { o = createObject(); Create_Table(); if (Page.IsPostBack) Save_Data(); } I thought I could execute Save_Data() at the begining of every postback event, but I think that should exist a better way to solve my problem. Thanks.

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  • simple JQuery example is causing me troubles for unknown reason

    - by cerr
    I'm relatively new to JQuery and would like to try something. I just followed a simple tutorial to start up with on http://docs.jquery.com/Tutorials:Getting_Started_with_jQuery So I specified my script in the : <script type="text/javascript"> $(document).ready(function() { $("a").click(function() { alert("Hello world!"); }); }); </script> and included a test link in the : <a href="">Link</a> however, when I refresh thet document my browser keeps saying TypeError: Property '$' of object [object Window] is not a function which I can understand for "normal" JavaScript but I believe this kind of function is new in JQuery. Can someone assist mer here, please? links:http://wittmerperformance.com/site/

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  • C#, Using Custom Generic Collection faster with objects than List

    - by Kaminari
    Hello, I'm using for now List< to iterate through some object collection and find matching element, The problem is that object has only 2 significant values Name and Link (strings) but has some other values wich I dont want to compare. I'm thinkig about using something like HashSet (wich is exactly what I'm searching for - fast) from .NET 3.5 but target framework has to be 2.0. There is something called Power Collections here: http://powercollections.codeplex.com/ But maybe there is other way? If not, can you suggest me a suitable custom collection?

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  • Selecting a portion of a JSON array and applying variables in javascript or jquery

    - by user1644609
    I am retrieving a JSON file that returns its results like what you see below. The JSON has 365 days worth of data. I would like to create "views" of this JSON using javascript, one which pulls the last 10 days, then 1 month, 6 months, etc. After the getJSON function I am doing this to get a string as JSON, then turn it into an object and will then graph it. So I would like each "view" to be an object for the specified timeframe (using the one JSON). The obj_10days, obj_1month, etc variables would then be plotted. var $ graph = data ; var obj = $ . parseJSON ( $ graph ) ; JSON: [ { "Low": 8.63, "Volume": 14211900, "Date": "2012-10-26", "High": 8.79, "Close": 8.65, "Adj Close": 8.65, "Open": 8.7 }, { "Low": 8.65, "Volume": 12167500, "Date": "2012-10-25", "High": 8.81, "Close": 8.73, "Adj Close": 8.73, "Open": 8.76 }, { "Low": 8.68, "Volume": 20239700, "Date": "2012-10-24", "High": 8.92, "Close": 8.7, "Adj Close": 8.7, "Open": 8.85 }, Any help is appreciated, thank you!

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  • How can I get a nstableview to send an action when the user double-clicks an editable cell

    - by overcyn
    I am trying to emulate the behavior found in finder and itunes. Single click on a selected object edits it. Double click opens the object. I have set the doubleAction of the tableView but like it says in the documentation. "If the double-clicked cell is editable, this message isn’t sent and the cell is edited instead." I dont want this. Is there a way i can get that message sent even if the cell is editable? I really have no idea how to begin implementing this. Any general pointers would be appreciated.

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  • how to access a different movieclip within the flash in AS3

    - by Pieter888
    I've been trying to learn Action Script 3 the past few weeks, making tiny interactive games to learn the basics. I stumble upon a problem every now and then but most of the times google helps me out. But this problem has got me stuck so please help: The main stage contains two objects(movieclips), the player and a wall. The player has got his own code so when I drag in the player object I don't have to write any code into the main stage to be able to move the player. This all worked pretty well and I now wanted to add the wall so the player actually has something to bounce into. Now here is the problem, I want to check if the player touches the wall, I've done this before but that was when I used the main stage as my coding playground instead of putting the code in movieclips. How can I check if the player hits the wall within the movement code of the player object?

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  • Send a String[] ArrayList over Socket connection

    - by Duncan Palmer
    So i'm trying to send a String[] Array/List over an open socket connection. I currently have this code: Sending: public void sendData() { try { OutputStream socketStream = socket.getOutputStream(); ObjectOutputStream objectOutput = new ObjectOutputStream(socketStream); objectOutput.writeObject(new String[] {"Test", "Test2", "Test3"}); objectOutput.close(); socketStream.close(); } catch (Exception e) { System.out.println(e.toString()); } } Recieving: public Object readData() { try { InputStream socketStream = socket.getInputStream(); ObjectInputStream objectInput = new ObjectInputStream(new GZIPInputStream(socketStream)); Object a = objectInput.readObject(); return a; } catch(Exception e) { return null; } } After I have recieved the String array/list on the other end I want to be able to iterate through it like I would do normally so I can get the values. My current code doesn't seem to works as it returns null as the value. is this possible?

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  • Silverlight Windows Phone 7: Load Images From URL

    - by Lennie De Villiers
    Hi, I got the code below that is trying to load an image from the web into an Image control, when I run it I get an error on the given line that no network access is allowed: private void button1_Click(object sender, RoutedEventArgs e) { WebClient webClientImgDownloader = new WebClient(); webClientImgDownloader.OpenReadCompleted += new OpenReadCompletedEventHandler(webClientImgDownloader_OpenReadCompleted); webClientImgDownloader.OpenReadAsync(new Uri("http://dilbert.com/dyn/str_strip/000000000/00000000/0000000/000000/80000/5000/100/85108/85108.strip.print.gif", UriKind.Absolute)); } void webClientImgDownloader_OpenReadCompleted(object sender, OpenReadCompletedEventArgs e) { BitmapImage bitmap = new BitmapImage(); bitmap.SetSource(e.Result); // ERROR HERE! image1.Source = bitmap; } Silverlight for Windows Phone 7

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  • Initializing a value through a Session variable

    - by William Calleja
    I need to Initialize a value in a Javascript by using a c# literal that makes reference to a Session Variable. I am using the following code <script type="text/javascript" language="javascript" > var myIndex = <%= !((Session["myIndex"]).Equals(null)||(Session["myIndex"]).Equals("")) ? Session["backgroundIndex"] : "1" %>; However the code above is giving me a classic Object reference not set to an instance of an object. error. Why? Shouldn't (Session["myIndex"]).Equals(null) capture this particular error?

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  • what is the purpose of numeric/boolean/string objects as opposed to primitive values?

    - by zespri
    In javascript you can call a function as a function or as a constructor. For example you can do : myObject = new Number(13); myPrimitiveValue = Number(13); or simply myPrimitiveValue = 13; I understand the difference between the results. Can you explain me under which reasonable circumstances creating a number, a boolean or a string as an object is desirable? For example, ability to set new properties (this is something you can do on objects but can't really do on primitive values) is almost always a bad idea for objects containing number/boolean/string. Why would I want a numeric/boolean/string object?

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  • Gridview SortExpression with 2 fields

    - by aron
    Hello, I have a GridView that get's its datasource from a complex object. So I'm doing the Sorting & Paging in the code behind. <asp:GridView ID="SystemsDetailList" runat="server" AllowSorting="true" AllowPaging="true" AutoGenerateColumns="False" ShowFooter="True" OnPageIndexChanging="gridView_PageIndexChanging" OnSorting="gridView_Sorting"> For an important title column I have a SortExpression with 2 fields: SortExpression="FunctionalAreaDisplayCode, EswbsDisplayCode" This in the code behind: protected void gridView_Sorting(object sender, GridViewSortEventArgs e) { BindSystemList(e.SortExpression, sortOrder); } public string sortOrder { get { if (ViewState["sortOrder"].ToString() == "desc") { ViewState["sortOrder"] = "asc"; } else { ViewState["sortOrder"] = "desc"; } return ViewState["sortOrder"].ToString(); } set { ViewState["sortOrder"] = value; } } For some reason it will keep "FunctionalAreaDisplayCode" always sorted ASC but the EswbsDisplayCode works fine as it flips between ASC and DESC correctly. and tips here? thanks!

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