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  • Why can't i define recursive variable in code block?

    - by senia
    Why can't i define a variable recursively in a code block? scala> { | val fibs: Stream[Int] = 1 #:: fibs.scanLeft(1){_ + _} | } <console>:9: error: forward reference extends over definition of value fibs val fibs: Stream[Int] = 1 #:: fibs.scanLeft(1){_ + _} ^ scala> val fibs: Stream[Int] = 1 #:: fibs.scanLeft(1){_ + _} fibs: Stream[Int] = Stream(1, ?) lazy keyword solves this problem, but i can't understand why it works without a code block but throws a compilation error in a code block.

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  • Extended MAPI: How to get the entry ID of messages moved by CopyMessages

    - by marijne
    I have found that if I move a message using IMAPIFolder::CopyMessages (using the MESSAGE_MOVE flag) the message gets a new entry ID. However I do not see any reliable way of getting the entry ID of the message in its new location, or otherwise getting a reference to it. The best suggestion I have had so far involves tagging the message with the old custom property before moving, and then doing a search afterwards, but I was wondering if there is a less convoluted solution.

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  • callback pattern

    - by robUK
    Hello, gcc 4.4.3 c89 I am creating a client server application and I will need to implement some callback functions. However, I am not too experienced in callbacks. And I am wondering if anyone knowns some good reference material to follow when designing callbacks. Is there any design patterns that are used for c. I did look at some patterns but there where all c++. Many thanks for any suggestions,

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  • c++, when do you need/have to pass data as (*&)

    - by ra170
    I came across people passing data objects as: declaration: DataObject * data = 0; calling it as: SomeMethod( data ); definition of Somethod: void SomeMethod(SomeObject * & object) My obvious question is, when and why do you have to do this (& *)? Is it passing the pointer as reference?

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  • Why is the application not starting from top...

    - by user536213
    i have created iphone game.When i pause the game using pause button i quit cliking quit button... Now when i start the game again ..the previous counter i created using this code... [NSTimer scheduledTimerWithTimeInterval:1.0 target:self selector:@selector(updateTimerFunc) userInfo:nil repeats:YES]; the timer is 100 sec and moves to zero...now it start giving the difference of twwo ,,98,96,94 if i quit the game again ans start this time the difference will become of 4 96,92 ...its keep on increasing ....what is this issue? kindly help

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  • Format String become 0001, 0010 etc

    - by trycatch4j
    Hi all.., I have number : 1, 2, 3, 4, 10 But I wanna print that number 0001 0002 0003 0004 0010 I have search in google, the keyword is number format. but I've got nothing, I just get, frmat decimal such ass 1,000,000.00. hope you can suggest me a reference or give me some problem solving. Thanks,

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  • Will this be garbage collected in JVM?

    - by stjowa
    I am running the following code every two minutes via a Timer: object = new Object(this); Potentially, this is a lot of objects being created and a lot of objects being overwritten. Do the overwritten objects get garbage collected, even with a reference to itself being used in the newly created object? I am using JDK 1.6.0_13. Thanks for the help.

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  • Get spiral index from location

    - by ricick
    I'm using Alberto Santini's solution to this question to get a spiral grid reference based on an items index Algorithm for iterating over an outward spiral on a discrete 2D grid from the origin It's not the accepted solution, but it's the best for my needs as it avoids using a loop. It's working well, but what I want now is to do the inverse. Based on a known x and y coordinate return the index of a location. This is as a precursor to returning the items surrounding a given location.

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  • nested sql statements

    - by Hadad
    Hello, I've a self join table when I delete or update it's id I want to delete or update all the direct and indirect affected records SQL server does not allow this type of cycle cascading I've decided to use triggers but this triggers will file recursively and they will be terminated at 34 level and I don't know the depth of records and event I disable the trigger and re enable it after completing the process how can I construct a SQL statement that achieve this logic?

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  • how can i change texts in the dynamic textFields in SimpleButton instance (button symbol)?

    - by sasi
    hi every one, this may be a basic thing, but i couldn't find an answer by serching internet. I have created a simple button - Istance name = "btnsample" and there are two layers layer 0- button design with rollovers - layer 1- dynamic text field - instance name = "txtbtnlabel" btnsample.txtbtnlabel.text = "new button label; but it's giving followin error :-119:Access of possible undefined propety txtbtnlabel through a reference with static type flash.display:simpleButton. how to solve this problem?

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  • C++/CLI DLL on C# doesn't compile

    - by Mishgun_
    I wrote a wrapper DLL for some native c++ functions and compiled it in c++/CLI, then I added a reference to C# project, functions indicates there, but when I try compile project I get this error: "Additional information: Could not load file or assembly 'lib, Version=1.0.3742.39593, Culture=neutral, PublicKeyToken=null' or one of its dependencies. An attempt was made to load a program with an incorrect format. " What's the problem ? Thanks.

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  • when i moved from FW3.5 to FW2.0 i got error

    - by Gold
    hi i have buield my project on VS2008 under FrameWork 3.5 now i need to move to FrameWork 2.0 when i done this, i got this error: Error 1 The type or namespace name 'TypedTableBase' does not exist in the namespace 'System.Data' (are you missing an assembly reference?) C:\Documents and Settings\xxx\Desktop\demo2005\demo\MyDB.Designer.cs 391 68 demo in this line: public partial class DO1TblDataTable : global::System.Data.TypedTableBase<DO1TblRow> { i think that it something with the crystal-report thank's in advance

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  • list box asp.net selected problem

    - by lodun
    .When i choose item from "kategorije" new items loads to me in SUB_kategorije, but when i choose item from SUB_kategorije and when i click on button it shows me this error: Object reference not set to an instance of an object. Line 101: kom.Parameters.Add("@podkategorija", SqlDbType.Text).Value = SUB_kategorije.SelectedItem.ToString(); This is my source... dod_pit.ascx dod_pit.ascx.cs

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  • how to leave a gap in select list from left

    - by Mayur
    Hi All, I m trying to leave a gap from left in select list, but its getting problem in firefox and safari please give me source code or any reference link from where i can work... code which i use : <select style="padding:10px"> <option>Male</option> <option>female</option> <option>other</option> </select> Thanks

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  • Excel assign copied sheet name as variable

    - by rach-90
    I'm trying to copy an existing sheet in my workbook and then I want to use the copied sheet to run the rest of my code. (Sheet3 is the existing sheet, S_Temp is the copied sheet) Dim s_Temp as string Sheet3.copy Activesheet.name = S_Temp Sheets("S_Temp").Range("A1").value = "Test" How can I reference to the copied sheet?

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  • How to get the location (x,y) of a CCLabel that is a child of a CCScene?

    - by RexOnRoids
    (learning Cocos2D) After creating a CCLabel and adding it to a CCLayer like this: //From HelloWorldScene.m // create and initialize a Label CCLabel* label1 = [CCLabel labelWithString:@"Hello" fontName:@"Marker Felt" fontSize:10]; label1.position = ccp(35, 435); // add the label as a child to this Layer [self addChild: label1]; How do I determine when a user has TOUCHED the label on the screen?

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  • Upload an image from JSON with rails

    - by Dougui
    I have an application created with PhoneGap and Backbone. I upload a file as JSon and my server receive data like this : data:image/jpeg;base64,/9j/4AAQSkZJRgABAQAAAQABAAD/... I'm trying to write the file like this : File.open("#{Rails.root}/public/images/#{self.id}.jpg", "w+") do |f| f.write(data) end It's not working and I don't know what to do. When I'm trying to open the file I have this message "Not a JPEG file: starts with 0x64 0x61". Do you have a solution?

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  • [iPhone] How to control other buttons' actions?

    - by Devoted
    Hi so say I have this code: UIAlertView *alert = [[UIAlertView alloc] initWithTitle: @"Yay" message: msg delegate: self cancelButtonTitle: @"Proceed..." otherButtonTitles: @"1", @"2", nil]; How do I control the other buttons "1" and "2"? (Suppose all other necessary code is in place, such as the undefined variable msg) Thanks!

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  • Find the end/finish coordinates you a UISwipeGestureRecognizer

    - by Code
    I can find the start coordinates of where a swipe starts by doing the following - (void)oneFingerSwipeUp:(UISwipeGestureRecognizer *)recognizer { CGPoint point = [recognizer locationInView:[self view]]; NSLog(@"Swipe up - start location: %f,%f", point.x, point.y); } Is it possible to find the coordinates where the swipe ended? I looked into the docs and its not mentioned. Is there some work around for this? Many Thanks, -Code

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