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• PostGIS - can't create spatially-enabled database

  - by itgorilla

  I'm using Ubuntu 10.10, PostgreSQL 9.0 and PostGIS 1.5. I've installed PostGIS 1.5 from: https://launchpad.net/~ubuntugis/+archive/ubuntugis-unstable I used PPA first then the command: sudo apt-get install postgis to install postgis. I've been following these instructions to create a spatially-enabled database: http://ostgis.refractions.net/docs/ch02.html#id2630100 I got to the point where it's saying: Now load the PostGIS object and function definitions into your database by loading the postgis.sql definitions file (located in [prefix]/share/contrib as specified during the configuration step). psql -d [yourdatabase] -f postgis.sql Well, there is no postgis.sql on my server after the installation. I did an sudo updatedb to make sure I can find postgis.sql but it's not there. Any ideas? Thank you!

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• How to create templates in JSTL JSP

  - by desau

  Say I have a JSP page with JSTL. I'm using c:forEach and looping over 5 different sets of objects, each very similar. Each loop is nearly identical.. lots of duplicated code. I'd like to make that loop a template -- such as a JSP template, but I want to pass the JSTL object(s) in the parameters. How can I do this? Or a more general question -- how can I create reusable HTML templates in JSP/JSTL?

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• Help Understanding Function

  - by Fred F.

  What does the following function perform? public static double CleanAngle(double angle) { while (angle < 0) angle += 2 * System.Math.PI; while (angle > 2 * System.Math.PI) angle -= 2 * System.Math.PI; return angle; } This is how it is used with ATan2. I believe the actually values passed to ATan2 are always positive. static void Main(string[] args) { int q = 1; //'x- and y-coordinates will always be positive values //'therefore, do i need to "clean"? foreach (Point oPoint in new Point[] { new Point(8,20), new Point(-8,20), new Point(8,-20), new Point(-8,-20)}) { Debug.WriteLine(Math.Atan2(oPoint.Y, oPoint.X), "unclean " + q.ToString()); Debug.WriteLine(CleanAngle(Math.Atan2(oPoint.Y, oPoint.X)), "cleaned " + q.ToString()); q++; } //'output //'unclean 1: 1.19028994968253 //'cleaned 1: 1.19028994968253 //'unclean 2: 1.95130270390726 //'cleaned 2: 1.95130270390726 //'unclean 3: -1.19028994968253 //'cleaned 3: 5.09289535749705 //'unclean 4: -1.95130270390726 //'cleaned 4: 4.33188260327232 }

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• linq where clause not in select statement

  - by Annie

  Can someone help me to convert from SQL Query to LINQ VB.NET: select rls.* from Roles rls(nolock) where rls.id not in ( select r.ID from usersRole ur (nolock) inner join Roles r(nolock) on ur.RoleID = r.ID where user_id = 'NY1772') Thanks

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• Conditionan Action in SSRS

  - by Jesse

  I want my textbox to have an action ONLY if the condition is true, otherwise no action. This is what I have as my current action expression for going to another report: =IIf(Fields!MyTextbox.Value = "0", "Report2","") This does not produce my desired result. It gives the textbox an action regardless of the condition result. Is there a 'No Action' or 'Cancel Action' value?

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• Filtering A MySQL Result Set Based On The Return Value Of A Function

  - by Joshua

  I'm a SQL noob, and I need a little bit of help understanding the big picture of if it is possible, and if so how to go about filtering a result set based on the return value of a function which is passed one of the fields of the record. Let's say I have a table called "Numbers" with just one field: "Value". How could I correctly specify the following "pseudo-sql"?: SELECT Value FROM numbers WHERE IsPrime(Value)=true Can I accomplish such a thing, and if so, where/how do I put/store "IsPrime"? I'm using MySQL.

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• Could the assign function for containers possibly overflow?

  - by Kristo

  I ran into this question today and thought I should post it for the community's reference and/or opinions. The standard C++ containers vector, deque, list, and string provide an assign member function. There are two versions; I'm primarily interested in the one accepting an iterator range. The Josuttis book is a little ambiguous with its description. From p. 237... Assigns all elements of the range [beg,end); this is, is replaces all existing elements with copies of the elements of [beg,end). It doesn't say what happens if the size of the assignee container is different from the range being assigned. Does it truncate? Does it automagically expand? Is it undefined behavior?

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• How to create a vertical gradient in flex

  - by Zeeshan Rang

  How to create vertical gradient in flex. What i currently have is a horizontal color gradient. And its working fine. But I am unable to figure out how should I make it vertical (which ofcourse is the requirement) I use styleName = "chatWindowLeftGradient" <mx:VBox id="chatTabBarVBox" height="100%" styleName="chatWindowLeftGradient"> </mx:VBox> And the style sheet looks like this: <mx:Style> .chatWindowLeftGradient{ backgroundImage: ClassReference("custom.GradientBackground"); backgroundSize: "100%"; fillColors: #6db263, #a4d9a1; fillAlphas: 1, 1; } </mx:Style> This give a gradient from top to bottom. How i can make from left to right?? Regards Zeeshan

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• Is it good practice to call module functions directly in VB.NET?

  - by froadie

  I have a Util module in my VB.NET program that has project-wide methods such as logging and property parsing. The general practice where I work seems to be to call these methods directly without prefixing them with Util. When I was new to VB, it took me a while to figure out where these methods/functions were coming from. As I use my own Util methods now, I can't help thinking that it's a lot clearer and more understandable to add Util. before each method call (you know immediately that it's user-defined but not within the current class, and where to find it), and is hardly even longer. What's the general practice when calling procedures/functions of VB modules? Should we prefix them with the module name or not?

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• how to create a watcher using fsevents in mac osx 10.6

  - by mathan

  I m trying to get file event notifications using fsevents.h file. I m working with Mac OS X 10.6 and XCode 3.1.4 in which i found fsevents.h in four following locations /System/Library/Frameworks/CoreServices.framework/Versions/A/Frameworks/CarbonCore.framework/Versions/A/Headers/FSEvents.h /Xcode3.1.4/SDKs/MacOSX10.5.sdk/System/Library/Frameworks/CoreServices.framework/Versions/A/Frameworks/CarbonCore.framework/Versions/A/Headers /Developer/SDKs/MacOSX10.5.sdk/System/Library/Frameworks/CoreServices.framework/Versions/A/Frameworks/CarbonCore.framework/Versions/A/Headers /Developer/SDKs/MacOSX10.6.sdk/System/Library/Frameworks/CoreServices.framework/Versions/A/Frameworks/CarbonCore.framework/Versions/A/Headers I have following issues in accessing fsevents.h 1) Out of above four locations which one should be included since fsevents is not getting included unless i put following include syntax include<../../../../Developer/SDKs/MacOSX10.6.sdk/System/Library/Frameworks/CoreServices.framework/Versions/A/Frameworks/CarbonCore.framework/Versions/A/Headers/fsevents.h 2) Where could I find the function definition whose prototypes are declared in fsevents.h using "extern" keyword

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• Separating arguments to a function, in locales with comma as decimal marker

  - by Chris Pousset

  In locales, e.g. French, with comma as decimal indicator (where "5,2" means five and two-tenths), how do users separate function arguments from each other? For example, in many programming/scripting languages, I could specify MAX(1.5, X) in a EN-US locale. How do you avoid the ambiguity between the comma as decimal indicator, and as argument separator? In particular, I'm interested in how software that's perceived as user-friendly in the foreign locale does it. Obviously, it's a no-brainer to say, "thou shalt use decimal POINTs", but that's not particularly "friendly".

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• Clojure: Equivalent to Common Lisp READ function?

  - by jkndrkn

  Hi there. When I want to read in an S-expression stored in a file into a running Common Lisp program, I do the following: (defun load-file (filename) "Loads data corresponding to a s-expression in file with name FILENAME." (with-open-file (stream filename) (read stream))) If, for example, I have a file named foo.txt that contains the S-expression (1 2 3), the above function will return that S-expression if called as follows: (load-file "foo.txt"). I've been searching and searching and have not found an equally elegant solution in Clojure. Any ideas? Thanks!

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• Function with missing return value, behavior at runtime

  - by nabulke

  As expected, the compiler (VisualStudio 2008) will give a warning warning C4715: 'doSomethingWith' : not all control paths return a value when compiling the following code: int doSomethingWith(int value) { int returnValue = 3; bool condition = false; if(condition) // returnValue += value; // DOH return returnValue; } int main(int argc, char* argv[]) { int foo = 10; int result = doSomethingWith(foo); return 0; } But the program runs just fine. The return value of function doSomethingWith() is 0. Is is just undefined behavior, or is there a certain rule how the result value is created/computed at runtime. What happens with non-POD datatypes as return value?

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• User can't login after creating them with the asp.net Create User Wizard

  - by Xaisoft

  When I create a user, they can't login until I go into the asp.net configuration and save them. I actually don't change any settings, I just press the save button and then they can login in. What I would like to do is to have the user be able to login once they are created, but I can't seem to get it to work. Here is my code for the CreatedUser method: protected void CreateUserWizard1_CreatedUser(object sender, EventArgs e) { CustomerProfile adminProfile = CustomerProfile.GetProfile(); string username = ((TextBox)CreateUserWizard1.CreateUserStep.ContentTemplateContainer.FindControl("UserName")).Text.Trim(); CustomerProfile createdUser = CustomerProfile.GetProfile(username); createdUser.CustomerID = adminProfile.CustomerID; createdUser.Save(); MembershipUser user = Membership.GetUser(username); user.IsApproved = ((CheckBox)CreateUserWizard1.CreateUserStep.ContentTemplateContainer.FindControl("chkActivateUser")).Checked; Roles.AddUserToRole(user.UserName, "nonadmin"); }

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• problem with trying to create ssms add-in

  - by Karl

  I'm trying to create an add-in for SSMS 2008 and/or 2008 R2 but I've run into a problem straight away. I can get my add-in to work and on SSMS start-up get it to simply show a message box. However, after downloading various code-samples, when trying to reference Microsoft.SqlServer.Management.UI.VSIntegration.ServiceCache I get a null reference exception: Commands2 commands = (Commands2)ServiceCache.ExtensibilityModel.Commands; I get this problem when using SSMS 2008 or SSMS 2008 R2. I'm working on Visual Studio 2010. It's a bit frustrating because I'm keen to learn more about SSMS add-ins but can't seem to get past the few samples out there. Any advice/tips appreciated. Thanks

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• C++ Ambiguous call to Overloaded Function (const variety)

  - by Joe

  After researching this online, I've only found solutions that don't apply to my problem, so please bear with me. Code snippet: typedef my_map_t<int const *, float> _test; my_map_t::const_iterator not_found = my_map_t::end(); if (_test.find(&iKeyValue) == not_found) { _test[iKeyValue] = 4 + 5; // not the actual code, but here for simplicity } The compiler complains that there's an ambiguous call to my_map_t::end(). This makes sense, because the only difference is the return type. Output: error C2668: 'std::_Tree<_Traits>::end' : ambiguous call to overloaded function Normally you can disambiguate the call by casting the parameters, but end() has no parameters. Any ideas?

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• How do I create SEO-Friendly urls in ASP.Net-MVC

  - by blesh

  I'm getting myself acquainted with ASP.Net-MVC, and I was trying to accomplish some common tasks I've accomplished in the past with webforms and other functionality. On of the most common tasks I need to do is create SEO-friendly urls, which in the past has meant doing some url rewriting to build the querystring into the directory path. for example: www.somesite.com/productid/1234/widget rather than: www.somesite.com?productid=1234&name=widget What method do I use to accomplish this in ASP.Net-MVC? I've search around, and all I've found is this, which either I'm not understanding properly, or doesn't really answer my question: http://stackoverflow.com/questions/734583/seo-urls-with-asp-net-mvc

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• Is there a way to create custom UIDataDetectorTypes?

  - by KingAndrew

  Hi All, What I am trying to do is create tooltip functionality so that certain words in my instructional app can be tapped and the definition pops up. For the popup part I plan on using code from “AFInformationView” which provides bubbles on the iPhone. The part I'm struggling with is how to associate A particular word's location with the bubble. Currently I have the text on a UILabel that is on a custom UITableCell. Since I calculate the row height on the fly with: [textToUse sizeWithFont:[UIFont systemFontOfSize:FONT_SIZE] constrainedToSize:CGSizeMake(stop-start, 500)]; I'm not sure what the coordinates for a specific word will be. I was thinking that if I created a custom DataDetectorType that could be the fix. If anyone knows how to do this or has any other ideas I would be happy to hear them. Thanks, Andrew

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• Create WPF TextBox that accepts only numbers

  - by Elad

  I would like to create a TextBox that only accepts numeric values, in a specific range. What is the best way to implement such TextBox? I thought about deriving TextBox and to override the validation and coercion of the TextProperty. However, I am not sure how to do this, and I understand that deriving WPF control is generally not recommended. Edit: What I needed was a very basic textbox that filters out all key presses which are not digits. The easiest way to achieve it is to handle the TextBox.PreviewTextInput event: private void textBox_PreviewTextInput(object sender, TextCompositionEventArgs e) { int result; if (!validateStringAsNumber(e.Text,out result,false)) { e.Handled = true; } } (validateStringAsNumber is my function that primarily use Int.TryParse) Some of the suggested solutions are probably better, but for the simple functionality I needed this solution is the easiest and quickest to implement while sufficient for my needs.

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• Create PHP DOM xml file and create a save file link/prompt without writing the file to the server wh

  - by Reed Richards

  I've created a PHP DOM xml piece and saved it to a string like this: <?php // create a new XML document $doc = new DomDocument('1.0'); ... ... ... $xmldata = $doc->saveXML(); ?> Now I can't use the headers to send a file download prompt and I can't write the file to the server, or rather I don't want the file laying around on it. Something like a save this file link or a download prompt would be good. How do I do it?

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• how to create an iphone Application that uses its GPS system

  - by vicky-saini

  Hi I am fairly new to iphone development. Right now, I am working on an iphone game that is being developed in cocos2d. But I want to create an iphone application that uses its GPS system. I searched a lot on net but didn't find much. I want to know about: What framework tou use like cocoa touch or cocos2d,etc? Any linksk that could help me regarding this? Any other relevant and helpful information? Thanks

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• Create method to handle multiple types of controls

  - by Praesagus

  I am trying to create a method that accepts multiple types of controls - in this case Labels and Panels. The conversion does not work because IConvertible doesn't convert these Types. Any help would be so appreciated. Thanks in advance public void LocationsLink<C>(C control) { if (control != null) { WebControl ctl = (WebControl)Convert.ChangeType(control, typeof(WebControl)); Literal txt = new Literal(); HyperLink lnk = new HyperLink(); txt.Text = "If you prefer a map to the nearest facility please "; lnk.Text = "click here"; lnk.NavigateUrl = "/content/Locations.aspx"; ctl.Controls.Add(txt); ctl.Controls.Add(lnk); } }

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• CreateDIBSection is throwing, when trying to create cursor on Win

  - by Anaamika

  Hi, I am trying to create Cursor from png, and CreateDIBSection() is throwing. Follwoing is the snippet of code: HDC hdc = GetDC(NULL); void* lpBits = NULL; HBITMAP hBitmap; try { hBitmap = CreateDIBSection( hdc, (BITMAPINFO*)&bi, 0, &lpBits, NULL, (DWORD)0); } ReleaseDC(NULL, hdc); As CreateDIBSection is throwing, the code to release DC is not getting executed. can you please let me know the possible issue behind this?

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• possible to create sql query with table wildcards?

  - by Rees

  this is probably a simple question, but i have been unable to find a solution online, any help would be much appreciated. I'm trying to create an SQL query in PHP and would like to somehow apply a wild card to the TABLE filter... something perhaps like.... select * from %table%. However, I have only so far been able to see filters for column values not table names. as an example i would have tables such as: jan_table_1 feb_table_1 jan_table_2 feb_table_2 and would want to say, select only tables with a "jan" prefix... or "1" suffix. Is there a quick and easy solution to this that I have not seen? Thanks in advance!

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• How to create custom get and set methods for Linq2SQL object

  - by optician

  I have some objects which have been created automatically by linq2SQL. I would like to write some code which should be run whenever the properties on these objects are read or changed. Can I use typical get { //code } and set {//code } in my partial class file to add this functionality? Currently I get an error about this member already being defined. This all makes sense. Is it correct that I will have to create a method to function as the entry point for this functionality, as I cannot redefine the get and set methods for this property. I was hoping to just update the get and set, as this would mean I wouldn't have to change all the reference points in my app. But I think I may just have to update it everywhere.

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