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  • Is there a way to optimize this update query?

    - by SchlaWiener
    I have a master table called "parent" and a related table called "childs" Now I run a query against the master table to update some values with the sum from the child table like this. UPDATE master m SET quantity1 = (SELECT SUM(quantity1) FROM childs c WHERE c.master_id = m.id), quantity2 = (SELECT SUM(quantity2) FROM childs c WHERE c.master_id = m.id), count = (SELECT COUNT(*) FROM childs c WHERE c.master_id = m.id) WHERE master_id = 666; Which works as expected but is not a good style because I basically make multiple SELECT querys on the same result. Is there a way to optimize that? (Making a query first and storing the values is not an option. I tried this: UPDATE master m SET (quantity1, quantity2, count) = ( SELECT SUM(quantity1), SUM(quantity2), COUNT(*) FROM childs c WHERE c.master_id = m.id ) WHERE master_id = 666; but that doesn't work.

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  • Cmake suddenly can't find my source files anymore...

    - by aheld
    To make a long story short: To add insult to injury, CMake actually ran fine several times. I was wrestling with a compiler error when CMake suddenly didn't feel like working anymore. For reference, here's the whole CMakeLists.txt file: set(CMAKE_INCLUDE_CURRENT_DIR ON) Find_Package ( SDL REQUIRED ) Find_Package ( SDL_image REQUIRED ) Find_Package ( SDL_mixer REQUIRED ) if ( NOT SDL_FOUND ) message ( FATAL_ERROR "Make sure that SDL is installed" ) endif ( NOT SDL_FOUND ) link_libraries ( ${SDL_LIBRARY} ${SDLIMAGE_LIBRARY} ${SDLMIXER_LIBRARY} SDLmain ) set(wiggle_SOURCES level.cpp levelgenerator.cpp main.cpp player.cpp scoreboard.cpp snake.cpp soundplayer.cpp titlescreen.cpp ) add_executable(Wiggle ../${wiggle_SOURCES}) The error occured for the first time when, instead of simply typing "make", I typed "make -lSDL -lSDL_image -lSDL_mixer" - make refused to find the header files SDL.h and SDL_image.h after I detached the project from Code::Blocks.

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  • Git push origin master

    - by user306472
    I am new to git and recently set up a new account with github. I'm following a rails tutorial from Michael Hartl online ( http://www.railstutorial.org/book#fig:github_first_page ) and followed his instructions to set up my git which were also inline with the setup instructions at github. Anyways, the "Next Steps" section on github were: mkdir sample_app cd sample_app git init touch README git add README git commit -m 'first commit' git remote add origin [email protected]:rosdabos55/sample_app.git git push origin master I got all the way to the last instruction (git push origin master) without any problem. When I entered that last line into my terminal, however, I got this error message: "fatal: No path specified. See 'man git-pull' for valid url syntax." What might I be doing wrong?

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  • linq NullReferenceException while checking for null reference

    - by Odrade
    I have the following LINQ query: List<FileInputItem> inputList = GetInputList(); var results = from FileInputItem f in inputList where ( Path.GetDirectoryName(f.Folder).ToLower().Trim() == somePath || Path.GetDirectoryName(f.Folder).ToLower().Trim() == someOtherPath ) && f.Expression == null select f; Every time this query is executed, it generates a NullReferenceException. If I remove the condition f.Expression == null or change it to f.Expression != null, the query executes normally (giving the wrong results, of course). The relevant bits of FileInputItem look like this: [Serializable] public class FileInputItem { [XmlElement("Folder")] public string Folder { get; set; } [XmlElement("Expression")] public string Expression { get; set; } /*SNIP. Irrelevant properties */ } I'm new to LINQ to objects, so I'm probably missing something fundamental here. What's the deal?

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  • Serializing response from JSP and converting them to C# objects

    - by SARAVAN
    I have a silverlight web application. From this app I am making a call to .jsp pages using WebClient class. Now jsp returns a response in the following format { "results":[{"Value":"1","Name":"Advertising"}, {"Value":"2","Name":"Automotive Expenses"},{"Value":"3","Name":"Business Miscellaneous"}] } The above response is assigned to my Stream object. I have a c# class CategoryType public class CategoryType { public string Value{get;set;} public string Name{get;set;} } My aim is to convert the reponses in to Collection<CategoryType> and use it in my C# Code As of now I am trying to use DataContractJSONSerialiser. But not sure if there is an easy and efficent way to do this. Any help would be appreciated

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  • jQuery Cycle plugin: One pager to control multiple slideshow on a page

    - by Michael
    Hi there, I have a cycle plugin set up on a page (images) with a pager to control the horizontal slide. My issue is that there is a transparent overlay that needs to sit over part of the images for some text relating to each image but would rather have that with a different transition effect for this so it doesn't slide in from the left. Am I able to set up to slideshows, each with 3 pieces of related content, that I can position correctly and have them controlled with the one pager? My script currently looks like this: $(function() { $('.s4').before('<div id="nav" class="nav">').cycle({ fx: 'fade', speed: 'slow', speedIn: 'slow', // speed of the 'in' transition speedOut: 'slow', timeout: 6000, pager: '#nav' }); }); I hope this makes sense, Thanks

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  • Preserving Bitmap values when creating a new Bitmap from System.Drawing.Image

    - by Otaku
    I'm trying to create a resized image from a bitmap, set a new height/width and a new resolution and save it to PNG. I can do this either from directly A) Image.FromFile(filename) or B) New Bitmap(imageSource) to create the the A Bitmap to be passed to B. Both work okay schmokay, but A does not allow me to set a new width/height on creation (but it does allow me to preserve values with useIcm=True) and B does not allow me to preseve values. Okay, now on to some code and examples: Dim sourceBitmap As New Bitmap(imagePath & myImage1Name) <-not good at all (#1 overload). Doesn't preserve things like HorizontalResolution or PixelFormat on .Save Dim sourceBitmap2 As Bitmap = Image.FromFile(imagePath & myImage1Name, True) <-not good (#5 overload). it does preserve things like HorizontalResolution or PixelFormat on .Save, but it doesn't allow me to initialize image at a new size. Dim targetBitmap As New Bitmap(sourceBitmap2, newWidth, newHeight) <-not good. Even though sourceBitmap2 (see #2 above) was initialized with useIcm=True, it doesn't matter once I've passed it in as the source in targetBitmap. Basically, I'm looking for a way to contruct a New Bitmap with both something like useIcm=True and set the width/height at the same time (Width/Height are read-only properties once it's created). I've gone down the Graphics.DrawImage route as well and it's the same - Graphics.FromImage(sourceBitmap) does not preserve values. Why do I need these values to be preserved? Because I need to convert these pictures to PNG (for file size) with a new resolution and keep the same physical dimensions (w/h in inches) for printing. I know the new pixel width/height needed based on the resolution values I'll pass in with .SetResolution(xDpi,yDpi) to preserve physical dimensions, so that's not the problem. The issue is things like the PixelFormatSize need to remain unchanged (yes, I've tried EncoderParameters - they don't work. I can give you the gory details if you like, but suffice it to say for now, they just don't work). Whew, got that off my chest! Okay, anyone who really knows how all this works can help?

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  • CueText equivalent for a TMemo

    - by JosephStyons
    I have this Delphi code to set the cue text of a control on my form: procedure TfrmMain.SetCueText(edt: TWinControl; cueText: string); const ECM_FIRST = $1500; EM_SETCUEBANNER = ECM_FIRST + 1; begin SendMessage(edt.Handle,EM_SETCUEBANNER,0, LParam(PWideChar(WideString(cueText)))); end; I want the same effect on a TMemo, but the MSDN document says: You cannot set a cue banner on a multiline edit control or on a rich edit control. Is there a standard way to have a cuetext effect on a TMemo, or do I have to fiddle with the OnEnter/OnExit events and roll my own?

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  • Running pl/sql in Korn Shell(AIX)

    - by learner135
    I have a file to execute in Ksh written by someone. It has a set of commands to execute in sqlplus. It starts with, sqlplus -s $UP <<- END followed by a set of ddl commands such as create,drop,etc., When I execute the file in the shell, I get the error in the starting line quoted above. I understand "-s" starts the sqlplus in silent mode and $UP is the connection string with username/password. But I couldn't make heads or tails of "<<- END" part(Many sites from google says input redirection is "<<" not "<<-"). So I presumed the error must be in that part and removed it from the file. Now it reads, sqlplus -s $UP But once I execute the file, It waits for input from the shell, instead of reading the rest of the lines from the file. How would I make sqlplus to execute the ddl commands in the rest of the file?. Thanks in advance.

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  • EF4 CTP5 Code First approach ignores Table attributes

    - by Justin
    I'm using EF4 CTP5 code first approach but am having trouble getting it to work. I have a class called "Company" and a database table called "CompanyTable". I want to map the Company class to the CompanyTable table, so have code like this: [Table(Name = "CompanyTable")] public class Company { [Key] [Column(Name = "CompanyIdNumber", DbType = "int")] public int CompanyNumber { get; set; } [Column(Name = "CompanyName", DbType = "varchar")] public string CompanyName { get; set; } } I then call it like so: var db = new Users(); var companies = (from c in db.Companies select c).ToList(); However it errors out: Invalid object name 'dbo.Companies'. It's obviously not respecting the Table attribute on the class, even though it says here that Table attribute is supported. Also it's pluralizing the name it's searching for (Companies instead of Company.) How do I map the class to the table name?

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  • How do I change a child's parent in NHibernate when cascade is delete-all-orphan?

    - by Daniel T.
    I have two entities in a bi-directional one-to-many relationship: public class Storage { public IList<Box> Boxes { get; set; } } public class Box { public Storage CurrentStorage { get; set; } } And the mapping: <class name="Storage"> <bag name="Boxes" cascade="all-delete-orphan" inverse="true"> <key column="Storage_Id" /> <one-to-many class="Box" /> </bag> </class> <class name="Box"> <many-to-one name="CurrentStorage" column="Storage_Id" /> </class> A Storage can have many Boxes, but a Box can only belong to one Storage. I have them mapped so that the one-to-many has a cascade of all-delete-orphan. My problem arises when I try to change a Box's Storage. Assuming I already ran this code: var storage1 = new Storage(); var storage2 = new Storage(); storage1.Boxes.Add(new Box()); Session.Create(storage1); Session.Create(storage2); The following code will give me an exception: // get the first and only box in the DB var existingBox = Database.GetBox().First(); // remove the box from storage1 existingBox.CurrentStorage.Boxes.Remove(existingBox); // add the box to storage2 after it's been removed from storage1 var storage2 = Database.GetStorage().Second(); storage2.Boxes.Add(existingBox); Session.Flush(); // commit changes to DB I get the following exception: NHibernate.ObjectDeletedException : deleted object would be re-saved by cascade (remove deleted object from associations) This exception occurs because I have the cascade set to all-delete-orphan. The first Storage detected that I removed the Box from its collection and marks it for deletion. However, when I added it to the second Storage (in the same session), it attempts to save the box again and the ObjectDeletedException is thrown. My question is, how do I get the Box to change its parent Storage without encountering this exception? I know one possible solution is to change the cascade to just all, but then I lose the ability to have NHibernate automatically delete a Box by simply removing it from a Storage and not re-associating it with another one. Or is this the only way to do it and I have to manually call Session.Delete on the box in order to remove it?

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  • Need a .NET Dictionary<string,object> with just a little more functionality.

    - by Ronnie Overby
    I need a dictionary but I also need to store a boolean value about the object in the dictionary. What's the best way for this. Something like Dictonary<string,object,bool> would be ideal, but doesn't exist. My first idea was: public class SomeObject { public object Value { get; set; } public bool Flag { get; set; } } // and then use: Dictionary<string,SomeObject> myDictionary; My 2nd idea was to implement IDictionary and contain two dictionaries within that were manipulated by the implemented methods and property accessors. My 3rd idea was to see what the folks at StackOverflow would do.

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  • Navigating cursor rows in SQLite

    - by Alan Harris-Reid
    Hi there, I am trying to understand how the following builtin functions work when sequentially processing cursor rows. The descriptions come from the Python 3.1 manual (using SQLite3) Cursor.fetchone() Fetches the next row of a query result set, returning a single sequence. Cursor.fetchmany() Fetches the next set of rows of a query result, returning a list. Cursor.fetchall() Fetches all (remaining) rows of a query result, returning a list. So if I have a loop in which I am processing one row at a time using cursor.fetchone(), and some later code requires that I return to the first row, or fetch all rows using fetchall(), how do I do it? The concept is a bit strange to me, especially coming from a Foxpro background which has the concept of a record pointer which can be moved to the 1st or last row in a cursor (go top/bottom), or go to the nth row (go n) Any help would be appreciated. Alan

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  • What is the "Dispatcher" design pattern?

    - by Ben Farmer
    What is the "dispatcher" pattern and how would I implement it in code? I have a property bag of generic objects and would like to have the retrieval delegated to a generic method. Currently, I have properties looking for a specific key in the bag. For example: private Dictionary<String, Object> Foo { get; set; } private const String WidgetKey = "WIDGETKEY"; public Widget? WidgetItem { get { return Foo.ContainsKey(WidgetKey) ? Foo[WidgetKey] as Widget: null; } set { if (Foo.ContainsKey(WidgetKey)) Foo[WidgetKey] = value; else Foo.Add(WidgetKey, value); } } It was suggested that this could be more generic with the "dispatcher" pattern, but I've been unable to find a good description or example. I'm looking for a more generic way to handle the property bag store/retrieve.

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  • Can checkboxes be removed from a .NET WinForms ListView at runtime?

    - by James
    Is it possible to remove the checkboxes from a .NET WinForms ListView control at runtime? The following code appears to have no effect when '.Checkboxes' has initially been set to 'true' and the control has rendered onto a form with checkboxes available for each list view item: // C#: testListView.BeginUpdate(); testListView.Checkboxes = false; testListView.EndUpdate(); Is there a method that must be called to enact this change? What is the use of providing the .Checkboxes property when it defaults to 'false' and only has an effect if set to 'true'?

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  • Is it possible to call a procedure within an SQL statement?

    - by darren
    Hi everyone I thought I would use a stored routine to clean up some of my more complex SQL statements. From what I've read, it seems impossible to use a stored procedure within an sql statement, and a stored function only returns a single value when what I need is a result set. I am using mySQL v5.0 SELECT p.`id`, gi.`id` FROM `sport`.`players` AS p JOIN `sport`.`gameinstances` AS gi ON p.`id` = gi.`playerid` WHERE (p.`playerid` IN (CALL findPlayers`("Canada", "2002"))) AND (gi.`instanceid` NOT IN (CALL findGameInstances`("Canada", "2002"))); For example, the procedures 'findPlayers' and 'findGameInstances' are are stored routines that execute some SQL and return a result set. I would prefer not to include their code directly within the statement above.

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  • Iphone sdk - please help , 1 view takes me 45 minutes to do :(

    - by Dave
    Hey, I've been working on a Cook Book App but each view ( or recipie page) takes about 45 minutes to complete so as you can imagine its taking forever. The problem is that I have to manually: Set up a gradient image for the back ground (Somtimes I have to add a few image backgrounds to fit the view as I often use a scroll view, not sure how this could be automated?) Put an image behind the titles "Recipe name" , "Time needed" and an image to go behind the recipie instructions ( again I might need a few of these depending on how long the description is. Creating view controllers for main sections such as "Breakfast" and "Lunch" and then I need to manually create view controllers to go in these sections. Theres got to be a way to set up a template for this? Thanks for reading all of this.

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  • TileGroup does not fill the container

    - by Luo Yong
    I put a TileGroup in a BorderContainer and set the width to 100%, but the content in the TileGroup did not fill the parent container, it leaves a big chunk of blank on the right part. The code is: <s:BorderContainer width="100%" height="100%"> <s:TileGroup width="100%" requestedColumnCount="2"> <s:Button> button1 </s:Button> <s:Button> button2 </s:Button> <s:Button> button3 </s:Button> </s:TileGroup> </s:BorderContainer> and the result is like this: http://i.minus.com/iN39P7Us4cBm1.png The width is already set to 100% but it does not work. Is there any way to make the TileGroup fill the container like GridLayout does in Java swing? http://www.java2s.com/Code/JavaImages/GridLayoutPane.PNG Thank you very much.

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  • Eclipse autocompletion problem

    - by Gene Marin
    Just installed Eclipse Helios (Win7 64) and I'm having a strange problem. I type syso-Ctrl-Space which is expected to complete to System.out.println("") but it doesn't work! I searched the web for about an hour now, I set Preferences Java Editor Content Assist to defaults, nothing. Everything else seems to work. Ideas? To be clear: the shortcut works, it completes everything except "syso" as seen so far, on syso (also tried sysout) it says "No Default Proposals". I couldn't find this kind of shortcuts in the Content Assist, but I set them to default anyway.

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  • Is Win32_PerfFormattedData_PerfDisk_PhysicalDisk missing from WMI in Vista?

    - by Martin
    From what I understand, the following script should work in Windows XP and higher, but it doesn't work for me in Vista Business 32-bit Service Pack 2. Thus far I have been very unsuccessful googling for information about this performance class. strComputer = "." Set objWMIService = GetObject("winmgmts:\\" & strComputer & "\root\cimv2") Set colApps = objWMIService.ExecQuery("Select * from Win32_PerfFormattedData_PerfDisk_PhysicalDisk") For Each objApp in colApps Wscript.Echo objApp.Caption Next Does this WMI class simply not exist in Vista? If it is just me, is there a way to fix WMI? I have already tried running winmgmt /resetrepository and winmgmt /resyncperf and neither helps.

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  • Is AutoMapper able to auto resolve types base on existing maps

    - by Chi Chan
    I have the following code: [SetUp] public void SetMeUp() { Mapper.CreateMap<SourceObject, DestinationObject>(); } [Test] public void Testing() { var source = new SourceObject {Id = 123}; var destination1 = Mapper.Map<SourceObject, DestinationObject>(source); var destination2 = Mapper.Map<ObjectBase, ObjectBase>(source); //Works Assert.That(destination1.Id == source.Id); //Fails, gives the same object back Assert.That(destination2 is DestinationObject); } public class ObjectBase { public int Id { get; set; } } public class SourceObject : ObjectBase { } public class DestinationObject : ObjectBase { } So basically, I want AutoMapper to automatically resolve the destination type to "DestinationObject" based on the existing Maps set up in AutoMapper. Is there a way to achieve this?

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  • Is ruby ||= intelligent?

    - by brad
    I have a question regarding the ||= statement in ruby and this is of particular interest to me as I'm using it to write to memcache. What I'm wondering is, does ||= check the receiver first to see if it's set before calling that setter, or is it literally an alias to x = x || y This wouldn't really matter in the case of a normal variable but using something like: CACHE[:some_key] ||= "Some String" could possibly do a memcache write which is more expensive than a simple variable set. I couldn't find anything about ||= in the ruby api oddly enough so I haven't been able to answer this myself. Of course I know that: CACHE[:some_key] = "Some String" if CACHE[:some_key].nil? would achieve this, I'm just looking for the most terse syntax.

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  • Facebooker Session is not created when config.cache_classes = true

    - by Michal
    I am using Facebooker (along with devise & devise_facebook_connectable). The problem is that user can't sign in with Facebook Connect in production environment unless I set config.cache_classes to false (which I don't want to do in production obviously). When cache_classes = true, Facebooker::Session.current is nil. Trying to set it manually creates other problems, so I assume it's not the solution. Using Rails 2.3.8 (tried on 2.3.5 too) and Facebooker 1.0.70 (tries on 1.0.69 too) and passenger 2.2.11. Any hints?

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