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  • c#: IsNullableType helper class ?

    - by mark smith
    Hi there, Can anyone help? I have some code that is shared between 2 projects. The code points to a model which basically is a collection of properties that comes from a db. Problem being is that some properties use nullable types in 1 model and the other it doesn't Really the dbs should use the same but they don't .. so for example there is a property called IsAvailble which uses "bool" in one model and the other it uses bool? (nullable type) so in my code i do the following objContract.IsAvailble.Value ? "Yes" : "No" //notice the property .VALUE as its a bool? (nullable type) but this line will fail on model that uses a standard "bool" (not nullable) as there is no property .VALUE on types that are NOT nullable Is there some kind of helper class that i check if the property is a nullable type and i can return .Value .. otherwise i just return the property. Anybody have a solution for this?

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  • How do I translate a point from one rect to a point in a scaled rect?

    - by Bill
    I have an image (i) that's been scaled from its original size (rectLarge) to fit a smaller rectangle (rectSmall). Given a point p in rectSmall, how can I translate this to a point in rectLarge. To make this concrete, suppose I have a 20x20 image that's been scaled to a 10x10 rect. The point (1, 1) in the smaller rect should be scaled up to a point in the larger rect (i.e. (2,2)). I'm trying to achieve this with: result.x = point.x * (destRect.size.width / srcRect.size.width ); result.y = point.y * (destRect.size.height / srcRect.size.height); However, the points generated by this code are not correct - they do not map to the appropriate point in the original image. What am I doing wrong?

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  • Quadratic bezier curve: Y coordinate for a given X ?

    - by stefan.at.wpf
    Hello, I have a quadratic bezier curve and I need the Y coordinate of a point on the bezier curve for a given X coordinate. I know that in pure maths this can be easily done, but I'm wondering is there's a simple / another way for this in C# / WPF? Is it possible to get the single points used by C# / WPF for drawing the bezier curve and then maybe just loop them and compare the X coordinate of each point with the given X coordinate? BTW for the mathematical way it would be good to know which step for the parameter t of the bezier curve has been choosen by C# / WPF? Any chance to find this out? Probably t is just scaled by / steps for t are 1/(distance of P0 and P2) ? Thank you very much for any hint!

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  • Suggestions based on unknown address in google's geocoder

    - by richardverbruggen
    When using Googles geocoder service to display a city on a map; filling out a non-existing city results in an error. Is there a way to display some suggestions based on the filled out city? var geocoder = new GClientGeocoder(); function showAddress(address, zoom) { geocoder.getLatLng( address, function(point) { if (!point) { //no point found.... //Suggest some points :) } else { map.setCenter(point, zoom); } } ); } showAddress('Someplace, Nederland', 14);

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  • Include a c# file in aspx page

    - by BeraCim
    Hi all: I have an aspx page that has a @Page directive which points to a c# class. e.g. <@ Page Language="C#" EnableSessionState="true" ValidateRequest="False" Inherits="MyClass" %> MyClass extends Page, which is the code behind class for that aspx page. Now I want to add another class to the aspx page. This class does some processing and will redirect the user to another page if certain conditions are met. It will be called before the above directive. I tried adding another @Page directive, but gotten an unknown error (literally). I'm thinking that there can only be one code behind class per aspx page so I got the error when I added another one. Googling such question didnt really help me with the answer. So, how do I add another c# class to the same aspx page? Thanks.

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  • Huge dataset point in polygon in .net (collision detection)

    - by Rickard Liljeberg
    I have a pretty big mesh with polygons, usually triangles but sometimes rectangles. Each point in my mesh has a value (value has nothing to do with coordinates). Now I am creating a second mesh in the same coordinate-space as the old mesh. I now want to interpolate out values for all points (vertices) in the new mesh using the values from the old mesh. Now I could loop each polygon in the new mesh and detect which old vertices are in each polygon by making 2d collision detection (altho even this I don't get to function properly so if anyone has simple and fast code for 2d collision detection (triangle is enough) I would gladly see it). However to my main point again. looping each old vertice for each new polygon seems less than efficient. is there a better way?

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  • Fastest sort of fixed length 6 int array

    - by kriss
    Answering to another StackOverflow question (this one) I stumbled upon an interresting sub-problem. What is the fastest way to sort an array of 6 ints ? As the question is very low level (will be executed by a GPU): we can't assume libraries are available (and the call itself has it's cost), only plain C to avoid emptying instruction pipeline (that has a very high cost) we should probably minimize branches, jumps, and every other kind of control flow breaking (like those hidden behind sequence points in && or ||). room is constrained and minimizing registers and memory use is an issue, ideally in place sort is probably best. Really this question is a kind of Golf where the goal is not to minimize source length but execution speed. I call it 'Zening` code as used in the title of the book Zen of Code optimization by Michael Abrash and it's sequels.

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  • Normalization in plain English

    - by Yada
    I sort of understand the concept of database normalization but always have a hard time explaining it in plain English especially for a job interview. I have read the wikipedia post, but still find it hard to explain the concept to none developers. "Design a database in a way not to get duplicated data" is the first thing that comes to mind. Does anyone was a nice way to explain the concept of database normalization in plain English. And what are some nice examples to show the differences between first, second and third normal forms. Say you go to a job interview and the person asks: Explain the concept of normalization and how would go about designing a normalized database. What key points are the interviewer looking for?

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  • translation/rotation of a HUD against a camera using vectors in Euclidian 3D space

    - by Jakob
    i've got 2 points in 3D space: the camera position and the camera lookAt. the camera movement is restricted akin to typical first person shooter games. you can move the cam freely, tilt horizontally and up to 90 degrees vertically, but not roll. so now i want to draw a HUD to the screen, on which i can move the mouse freely, with the position of the cursor correctly translating into 3D space. the easy part was to draw something directly in front of the camera. V0 = camPos; V1 = lookAt; V2 = lookAt-camPos; normalize V2; mutiply V2 according to camera frustum V3 = V0+V2 draw something at V3 now the part i don't get: i could use V3 and add to that the rotations of the cam combined with the x/y of the mouse cursor, somehow, right? that's what i want.

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  • .net/iis6 Limitations of the urlMappings in web.config for extensionless url rewriting

    - by ScottE
    I'm investigating a simple url rewriting setup for iis6 / net 2.0 sites. I've added a . wildcard mapping in IIS that points to the .net executable. I'm also using the urlMappings element in the web.config to add some rewritting urls. I've moved the config outside of the web.config so I can make changes to the list without forcing application restarts, like so: <urlMappings configSource="config\urlMappings.config"> </urlMappings> I'd like to allow our content management to add urls to this file so that we can have extensionless friendly urls. <add url="~/someurl" mappedUrl="index.aspx?page=123" /> This works just fine, but I'm concerned about limitations in the number of entries that I can map in the urlMappings config. I can't seem to find any documentation on this. Has anyone found any limitations? Thanks.

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  • Linq insert statement inserts nothing, does not fail either

    - by pietjepoeier
    I am trying to insert a new account in my Acccounts table with linq. I tried using the EntityModel and Linq2Sql. I get no insert into my database nor an exception of any kind. public static Linq2SQLDataContext dataContext { get { return new Linq2SQLDataContext(); } } try { //EntityModel Accounts acc = Accounts.CreateAccounts(0, Voornaam, Straat, Huisnummer, Stad, Land, 15, EmailReg, Password1); Entities.AddToAccounts(acc); Entities.SaveChanges(); //Linq 2 SQL Account account = new Account { City = Stad, Country = Land, EmailAddress = EmailReg, Name = Voornaam, Password = Password1, Street = Straat, StreetNr = Huisnummer, StreetNrAdd = Toevoeging, Points = 25 }; dataContext.Accounts.InsertOnSubmit(account); var conf = dataContext.ChangeConflicts; // No changeConflicts ChangeSet set = dataContext.GetChangeSet(); // 0 inserts, 0 updates, 0 deletes try { dataContext.SubmitChanges(); } catch (Exception ex) { } } catch (EntityException ex) { }

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  • Looking for an HQL builder (Hibernate Query Language)

    - by Sébastien RoccaSerra
    I'm looking for a builder for HQL in Java. I want to get rid of things like: StringBuilder builder = new StringBuilder() .append("select stock from ") .append( Stock.class.getName() ) .append( " as stock where stock.id = ") .append( id ); I'd rather have something like: HqlBuilder builder = new HqlBuilder() .select( "stock" ) .from( Stock.class.getName() ).as( "stock" ) .where( "stock.id" ).equals( id ); I googled a bit, and I couldn't find one. I wrote a quick & dumb HqlBuilder that suits my needs for now, but I'd love to find one that has more users and tests than me alone. Note: I'd like to be able to do things like this and more, which I failed to do with the Criteria API: select stock from com.something.Stock as stock, com.something.Bonus as bonus where stock.someValue = bonus.id ie. select all stocks whose property someValue points to any bonus from the Bonus table. Thanks!

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  • Memory issue regarding UIImageView on IPhone 4.0 / IPad

    - by Sagar Mane
    Hello All, My Application is crashing due to low memory [ Received memory warning level 1 + 2] To trace this I have used Instrument and come with following points Test Enviorment : Single view controller added on Window When I don't use UIImageView Real Memory is used 3.66 MB When I uses UIImageView with Image having size 25 KB : Real Memory is used 4.24 MB. almost 560 KB extra when compare to w/o UIImageView and which keep on adding as I am adding more UIImageview on the view. below is sample code for adding UIImageview which I am refering UIImageView* iSplashImage = [[UIImageView alloc] initWithImage:[UIImage imageNamed:@"Default-Landscape.png"]]; iSplashImage.frame = CGRectMake(0, 0, 320, 480); [self.window addSubview:iSplashImage]; AND dealloc if(iSplashImage) { [iSplashImage release]; iSplashImage = nil; } Issue is this 560 KB is not getting release and after some time application receives low memory warning. Can anyone point out if I am missing something or doing else. As My application uses lots of Images in One session. Thanks in Advance, Sagar

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  • getSelection & surroundContents across multiple tags

    - by lethalbody
    Hi, I've got a script that changes the background colour of text that has been selected. However i'm encountering an issue when the text is selected across multiple elements/tags. The code that i've got is: var text = window.getSelection().getRangeAt(0); var colour = document.createElement("hlight"); colour.style.backgroundColor = "Yellow"; text.surroundContents(colour); And the error being output is: Error: The boundary-points of a range does not meet specific requirements. = NS_ERROR_DOM_RANGE_BAD_BOUNDARYPOINTS_ERR Line: 7 I believe this is to do with the getRange() function though i'm not too sure how to proceed since I am a beginner at javascript. Is there any other way I can replicate what I am trying to achieve? Many thanks.

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  • algorithm for image comparison

    - by Rajnikant
    Please consider following use case, I have one bigger image, lets called is master image. Now from some where else, I am getting one small image. I want to check whether this small image is subset of master image or not. important points are, smaller image might have different file format, smaller image might captured from comparatively different view. smaller image may have different light intensity. At this stage of algorithm/computation advancement, which level of accuracy I could expect? Any algorithm/open source implementation that would have such implementation? Thanks, Rajnikant

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  • Finding the FORM that an element belongs to in JavaScript

    - by Magnus Smith
    How can I find out which FORM an HTML element is contained within, using a simple/small bit of JavaScript? In the example below, if I have already got hold of the SPAN called 'message', how can I easily get to the FORM element? <form name="whatever"> <div> <span id="message"></span> </div> </form> The SPAN might be nested within other tables or DIVs, but it seems too long-winded to iterate around .parentElement and work my way up the tree. Is there a simpler and shorter way? If it wasn't a SPAN, but an INPUT element, would that be easier? Do they have a property which points back to the containing FORM? Google says no...

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  • How hard is it to modify the Django Models?

    - by alex
    I am doing geolocation, and Django does not have a PointField. So, I am forced to writing in RAW SQL. GeoDjango, the Django library, does not support the following query for MYSQL databases (can someone verify that for me?) cursor.execute("SELECT id FROM l_tag WHERE\ (GLength(LineStringFromWKB(LineString(asbinary(utm),asbinary(PointFromWKB(point(%s, %s)))))) < %s + accuracy + %s)\ I don't nkow why GeoDjango library cannot do this in MYSQL database. I hate writing RAW SQL for calculating distances between two points. Is there a way I can create my own library for Django that can handle this? If so, how hard is it?

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  • Grails/Compass question - How can I change the compqass Connection to point to a different directory

    - by ombud
    Hi, I use the Searchable plugin with Grails I have the need to change the directory to which Compass points to, depending upon a UI choice by the user. Normally, this value is set in the compassConnection variable of the searchable map in grails-app/conf/Searchable.groovy, like so, and gets called at app startup time: searchable { compassConnection = new File( "/path/to/index/file/directory" ).absolutePath ... } To do what I need to do, I think that I need to get a handle into the compass config variable and then call config.setConnection("/new/path/to/index/dir") I don't know how I can get a reference to the config compass variable Am I right in assuming that I need to call setConnection(String) only, or is(are) there any other step(s) I need to take? Really appreciate any help that I can get, Shailen

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  • How to remove some of the TimeSeries titles in a AChartEngine Time Series View

    - by user1831310
    As a workaround of not being able to change colors of selected points in a series on an AChartEngine Time Chart, I was using an additional series for each point whose color has to be changed. I need to disable series titles for those additional series. Using empty string as the argument to the Time Series construtor: TimeSeries ts = TimeSeries(""); still results in the line-and-point symbol being placed with empty series title string under the X-axis labels for each such series. It would be a desirable feature for AChartEngine to remove both the line-and-point symbol and the series title string for a series created with a null argument to the TimeSeries construtor call: TimeSeries ts = TimeSeries(null); But this currently resulted in nullPointerException instead. Would the AChartEngine developers consider the above suggestion and until then, is there a way to remove some of the TimeSeries titles from a AChartEngine Time Series View? Best regards.

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  • The host 'smtp' could not be found.

    - by SmartestVEGA
    I am getting the following error while sending mail by click of a button in MS access form I am using sendObject to send mail using vba code. The host 'smtp' could not be found. Please verify that you have entered the server name correctly. Account: 'pop3', Server: 'smtp', Protocol: SMTP, Port: 25, Secure(SSL): No, Socket Error: 11001, Error Number: 0x800CCC0D Points to note: I am able to send and receive mails in my outlook; Problem is only when send mails through VBA access application.(Means it is not a outlook client configuration problem) When i copy paste the Vba application to another PC, i could successfully send emails without any error. (means this is not a vba access application problem) Please help.

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  • Get Angle to Tangent that Intersects Point

    - by Christian Stewart
    I have a circle around a given point, call this point (x1, y1). I know the radius of the circle around this point. I also have a second point (x2, y2), that is a distance away, outside the radius of the circle. I need a algebraic way through code to calculate the heading (angle from vertical) needed to intersect the circle at 90* to the center point (I.E. get the angle of the tangent intersecting line 2) around the point (x1, y1) from the second point (x2, y2) A bit of background: Essentially the two points are GPS coordinates on a 2D map, I need to know the target heading to intersect the circle in order to follow its path around the center point. Thanks! Christian

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  • is there a small portable linux with good development environment?

    - by Sriram
    let me put it this way..! i use windows/ my company wants me to use windows i like Linux i don't want to use cygwin i want a simple portable Linux with a development environment aka( make,gcc,g++,llvm,...) with a bash and vi is enough for me no need any gui. these 4 points never change. ;) i tried damn small Linux.. its awesome but it doesn't have what i need. so is there a portable Linux distribution that i can run from windows using qemu or something with a good up2date development environment? thanks in advance

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  • Visual Studio add-in to quickly test a code snippet

    - by Matti Virkkunen
    One thing I really love about languages such as Python is that if you have a piece of code you'd like to try out, you can just open the interactive shell and do it in seconds. Is there a Visual Studio add-in that does the same for C#? Basically what I'm looking for is something that opens up a window or tab with a text editor (preferably with code completion, because VS does it so nicely) and a button that runs the code and displays the output. Extra points for convenience features such as displaying complex output in a user-friendly way (think Firebug's console.log), automatically referencing all the assemblies the current project references, etc. I tried googling for a while, but either I fail at coming up with good keywords, or no-one has made an add-in like this. If there really is none, I'm considering making one myself.

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  • Redmon's Run As User not loading user's enviroment variables

    - by catfish
    I'm attempting to use Redmon http://www.winimage.com/misc/redmon/ to send print jobs to a custom C# application. Redmon "runs" (actually the Print Spooler) as SYSTEM but has an option to Run As User to allow your application to run under the user that printed the job. The problem is that it doesn't appear to load the user's environment. So calling functions like Path.GetTempPath() points to \windows\temp instead of the user's. Also when attempting to run Outlook 2007+ via MAPI calls (to add attachments) it reports form errors due to, I think, the temp folder location. Is there a way to "reload" a profile or atleast get your environment vars within the Impersonated application? The only ideas I've had so far is to rebuild the vars directly from the registry, but I want to avoid this since it's a hack around (avoiding implementation details and all that). Or making a stub program that Redmon calls which then properly Run As User with full profile the custom application. Any other items or tricks?

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  • Highstock set different colors for different markers

    - by user1651804
    I am tryting to develop a chart in Highstock where each marker got an individual color. When i push my Data in an Array like this : series.data.push([ parseInt(Math.round(myDate.getTime())), parseInt(Math.round(myDate.getHours())) ]); The Data is shown correctly, but when i try to set the color within each data-object like this, it doesn't work to show points. series.data.push([ { x: parseInt(Math.round(myDate.getTime())), y: parseInt(Math.round(myDate.getHours())), marker:{fillColor: 'red'}} ]); What am i missing? Update: When i inspect it with firebug i can see that the series is set correctly within the chart object. so why does it now show up? :/

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