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• What's the problem with the code below ?

  - by VaioIsBorn

  #include <iostream> #include <vector> using namespace std; int main(void) { int i, s, g; vector<int> a; cin >> s; for(i=1;i<=s;i++) { g = s; if(g<10) a.push_back(g); else { vector<int> temp; while(g > 0) { int k = g % 10; g = g / 10; temp.push_back(g); } for(int j=temp.size();j>0;j--) { a.push_back(temp[j]); } } } cout << a[s-1] << endl; return 0; } What is wrong with the code above ? It doesn't give me the appropriate results. The vector a is supposed to hold the values from 1, 2, 3...up to s such that a = 12345..910111213... and print to output a[s]. Ex if s=15 a=123456789101112131415 and a[15] = 2 . If someone could tell me what's the problem

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• Recursive code Sorting in VB

  - by Peter

  Ages old question: You have 2 hypothetical eggs, and a 100 story building to drop them from. The goal is to have the least number of guaranteed drops that will ensure you can find what floor the eggs break from the fall. You can only break 2 eggs. Using a 14 drop minimum method, I need help writing code that will allow me to calculate the following: Start with first drop attempt on 14th floor. If egg breaks then drop floors 1-13 to find the floor that causes break. ElseIf egg does not break then move up 13 floors to floor number 27 and drop again. If egg breaks then drop floors 15-26 starting on 15 working up to find the floor egg breaks on. ElseIf egg does not break then move up 12 floors to floor number 39 and drop again. etc. etc. The way this increases is as follows 14+13+12+11+10+9+8+7+6+5+4+3+2+1 So always adding to the previous value, by one less. I have never written a sorting algorithm before, and was curious how I might go about setting this up in a much more efficient way than a mile long of if then statements. My original idea was to store values for the floors in an array, and pull from that, using the index to move up or down and subtract or add to the variables. The most elegant solution would be a recursive function that handled this for any selected floor, 1-100, and ran the math, with an output that shows how many drops were needed in order to find that floor. Maximum is always 14, but some can be done in less.

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• Whats wrong with this video embed code?

  - by jamietelin

  Following embed code is from http://hd.se/landskrona/2010/04/09/kunglig-glans-pa-idrottsgalan/ but it doesn't work in Internet Explorer 8. Firefox no problems. Any recommendations for improvements? Thanks for your time! <object width="480px" height="294px" id="_36313041" data="http://hd.se/static/media/html/flash/video-3/flowplayer.swf" type="application/x-shockwave-flash"> <param name="movie" value="http://hd.se/static/media/html/flash/video-3/flowplayer.swf" /> <param name="allowfullscreen" value="true" /> <param name="allowscriptaccess" value="always" /> <param name="flashvars" value='config={"key":"$3fff7448b28a8cffc85","contextMenu":["hd.se videospelare 1.0"],"plugins":{"rtmp":{"url":"http://hd.se/static/media/html/flash/video-3/flowplayer.rtmp.swf"},"controls":{"height":24,"opacity":1,"all":false,"play":true,"time":true,"scrubber":true,"playlist":false,"mute":true,"volume":true,"fullscreen":true,"backgroundColor":"#222222","backgroundGradient":"none","buttonColor":"#7c7c7c","buttonOverColor":"#36558b","progressColor":"#7c7c7c","bufferColor":"#7c7c7c","timeColor":"#ffffff","durationColor":"#ffffff","timeBgColor":"#222222","scrubberHeightRatio":0.5,"scrubberBarHeightRatio":0.5,"volumeSliderHeightRatio":0.5,"volumeBarHeightRatio":0.5,"autoHide":"fullscreen","hideDelay":1800,"tooltips":{"buttons":true,"play":"Spela","pause":"Paus","next":"Nästa","previous":"Föregående","mute":"Ljud av","unmute":"Ljud på","fullscreen":"Fullskärmsläge","fullscreenExit":"Lämna fullskärmsläge"},"tooltipColor":"#153872","tooltipTextColor":"#ffffff"},"contentIntro":{"url":"http://hd.se/static/media/html/flash/video-3/flowplayer.content.swf","top":0,"width":736,"border":"none","backgroundColor":"#202020","backgroundGradient":"none","borderRadius":"none","opacity":"85pct","display":"none","closeButton":true}},"canvas":{"backgroundColor":"#000000","backgroundGradient":"none"},"play":{"replayLabel":"Spela igen"},"screen":{"bottom":24},"clip":{"scaling":"fit","autoPlay":true},"playlist":[{"provider":"rtmp","netConnectionUrl":"rtmp://fl0.c06062.cdn.qbrick.com/06062","url":"ncode/hdstart","autoPlay":false,"scaling":"fit"},{"url":"http://hd.se/multimedia/archive/00425/_kunligglans_HD_VP6_425359a.flv","scaling":"fit","autoPlay":true},{"provider":"rtmp","netConnectionUrl":"rtmp://fl0.c06062.cdn.qbrick.com/06062","url":"ncode/hdstopp","autoPlay":true,"scaling":"fit"}]}' /> </object>

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• Optimize a views drawing code

  - by xon1c

  Hi, in a simple drawing application I have a model which has a NSMutableArray curvedPaths holding all the lines the user has drawn. A line itself is also a NSMutableArray, containing the point objects. As I draw curved NSBezier paths, my point array has the following structure: linePoint, controlPoint, controlPoint, linePoint, controlPoint, controlPoint, etc... I thought having one array holding all the points plus control points would be more efficient than dealing with 2 or 3 different arrays. Obviously my view draws the paths it gets from the model, which leads to the actual question: Is there a way to optimize the following code (inside the view's drawRect method) in terms of speed? int lineCount = [[model curvedPaths] count]; // Go through paths for (int i=0; i < lineCount; i++) { // Get the Color NSColor *theColor = [model getColorOfPath:[[model curvedPaths] objectAtIndex:i]]; // Get the points NSArray *thePoints = [model getPointsOfPath:[[model curvedPaths] objectAtIndex:i]]; // Create a new path for performance reasons NSBezierPath *path = [[NSBezierPath alloc] init]; // Set the color [theColor set]; // Move to first point without drawing [path moveToPoint:[[thePoints objectAtIndex:0] myNSPoint]]; int pointCount = [thePoints count] - 3; // Go through points for (int j=0; j < pointCount; j+=3) { [path curveToPoint:[[thePoints objectAtIndex:j+3] myNSPoint] controlPoint1:[[thePoints objectAtIndex:j+1] myNSPoint] controlPoint2:[[thePoints objectAtIndex:j+2] myNSPoint]]; } // Draw the path [path stroke]; // Bye stuff [path release]; [theColor release]; } Thanks, xonic

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• a reusable query with modifications?

  - by fusion

  i'm using this mysql query alongwith php to search for multiple keywords: $query = "SELECT cQuotes, vAuthor, cArabic, vReference FROM ".$table." WHERE ("; $countFields = count($arrayFields); while ($a < $countFields) { while ($b < $countSearch) { $query = $query."$arrayFields[$a] LIKE '%$arraySearch[$b]%'"; $b++; if ($b < $countSearch) { $query = $query." AND "; } } $b = 0; $a++; if ($a < $countFields) { $query = $query.") OR ("; } } $query = $query.")"; $result = mysql_query($query, $conn) i'd like to reuse this query with a few modifications to it (for instance, the WHERE clause remains the same, while i query the number of rows using COUNT), but it doesn't seem practical to repeat the code again for a few additions. any suggestions?

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• Web Reference Code generator template.

  - by Bluephlame

  I Have an internal SOAP Web service that is being called from an external REST service in .NET it works fine however I am simply passing through the SOAP objects of the REST Layer but the automatic generation of the WebReference Code in Visual Studio adds the 'field' to the end of every attribute. basically it makes my XML look all nasty. Everything works I just want to clean up my XML. Any ideas how i can change the template for the reference.cs or to make the XML generate nicely from the Web Service Objects. Here is an example of the reference.cs public int HeadLeft { get { return this.headLeftField; } set { this.headLeftField = value; } } /// <remarks/> public int HeadTop { get { return this.headTopField; } set { this.headTopField = value; } } /// <remarks/> public int HeadWidth { get { return this.headWidthField; } set { this.headWidthField = value; } } Here is an examle of the XML <a:headHeightField>208</a:headHeightField> <a:headLeftField>316</a:headLeftField> <a:headTopField>103</a:headTopField> <a:headWidthField>161</a:headWidthField>

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• Linq Scope Problem + Reduce Repeated Code

  - by Tom Gullen

  If the parameter is -1, it needs to run a different query as to if an ID was specified... how do I do this? I've tried initialising var q; outside the If block but no luck! // Loads by Entry ID, or if -1, by latest entry private void LoadEntryByID(int EntryID) { IEnumerable<tblBlogEntry> q; if (EntryID == -1) { q = ( from Blog in db.tblBlogEntries orderby Blog.date descending select new { Blog.ID, Blog.title, Blog.entry, Blog.date, Blog.userID, Comments = ( from BlogComments in db.tblBlogComments where BlogComments.blogID == Blog.ID select BlogComments).Count(), Username = ( from Users in db.yaf_Users where Users.UserID == Blog.userID select new { Users.DisplayName }) }).FirstOrDefault(); } else { q = ( from Blog in db.tblBlogEntries where Blog.ID == EntryID select new { Blog.ID, Blog.title, Blog.entry, Blog.date, Blog.userID, Comments = ( from BlogComments in db.tblBlogComments where BlogComments.blogID == Blog.ID select BlogComments).Count(), Username = ( from Users in db.yaf_Users where Users.UserID == Blog.userID select new { Users.DisplayName }) }).SingleOrDefault(); } if (q == null) { this.Loaded = false; } else { this.ID = q.ID; this.Title = q.title; this.Entry = q.entry; this.Date = (DateTime)q.date; this.UserID = (int)q.userID; this.Loaded = true; this.AuthorUsername = q.Username; } } My main aim is to reduce repeating code

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• Can this code cause a memory leak (Arduino)

  - by tbraun89

  I have a arduino project and I created this struct: struct Project { boolean status; String name; struct Project* nextProject; }; In my application I parse some data and create Project objects. To have them in a list there is a pointer to the nextProject in each Project object expect the last. This is the code where I add new projects: void RssParser::addProject(boolean tempProjectStatus, String tempData) { if (!startProject) { startProject = true; firstProject.status = tempProjectStatus; firstProject.name = tempData; firstProject.nextProject = NULL; ptrToLastProject = &firstProject; } else { ptrToLastProject->nextProject = new Project(); ptrToLastProject->nextProject->status = tempProjectStatus; ptrToLastProject->nextProject->name = tempData; ptrToLastProject->nextProject->nextProject = NULL; ptrToLastProject = ptrToLastProject->nextProject; } } firstProject is an private instance variable and defined in the header file like this: Project firstProject; So if there actually no project was added, I use firstProject, to add a new one, if firstProject is set I use the nextProject pointer. Also I have a reset() method that deletes the pointer to the projects: void RssParser::reset() { delete ptrToLastProject; delete firstProject.nextProject; startProject = false; } After each parsing run I call reset() the problem is that the memory used is not released. If I comment out the addProject method there are no issues with my memory. Someone can tell me what could cause the memory leak?

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• jquery autosuggest: what is wrong with this code?

  - by Abu Hamzah

  i have been struggling to make it work my autosugest/autocomplete and its acting strange unless i am doing completely silly here. please have a look 1) does not do anything, does not work or nor fire the event. <script src="Scripts/jquery-1.4.2.js" type="text/javascript"></script> <script src="Scripts/jquery.autocomplete.js" type="text/javascript"></script> <form id="form1" runat="server"> <script type="text/javascript"> $(document).ready(function() { $("#<%=txtHost.UniqueID %>").autocomplete("HostService.asmx/GetHosts", { dataType: 'json' , contentType: "application/json; charset=utf-8" , parse: function(data) { var rows = Array(); debugger for (var i = 0; i < data.length; i++) { rows[i] = { data: data[i], value: data[i].LName, result: data[i].LName }; } return rows; } , formatItem: function(row, i, max) { return data.LName + ", " + data.FName; } }); }); </script> 2) this works if i remove the above code and replace with this code: <script type="text/javascript"> $(document).ready(function() { $("#txtHost").autocomplete("lazy blazy crazy daisy maisy ugh".split(" ")); }); </script> any help ?

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• C# expression tree for ordinary code

  - by rwallace

  It's possible to create an expression tree, if you declare it as such. But is it possible to get an expression tree for an ordinary chunk of code such as a method or property getter? What I'm trying to do is, let's say for an order processing system, I have a class for order items: class Item : Entity { [Cascade] public Document document { get; set; } public int line { get; set; } public Product product { get; set; } public string description { get; set; } public decimal qty { get; set; } public decimal price { get; set; } public decimal net { get { return qty * price; } } public VatCode vat_code { get; set; } } where the net value equals qty * price, so I'd like to declare it as such, either with a property or method, and then also have the framework introspect that expression so it can generate appropriate SQL for defining a corresponding calculated column in a corresponding database view. The most obvious way to do this would be to get the expression tree for a property getter or a method, but I can't find any indication how to do this, or that it is possible. (I have found a way to get a method body as a byte stream, but that's not what's desired here.) If that isn't possible, I suppose the recommended solution would be to declare something like a static field that is an expression tree, and compile/run it at run time for internal use, and also introspect as normal for SQL generation?

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• Safari specific scroll bar issue in legacy code

  - by user1237169

  I am trying to debug an issue that is occurring specifically in Safari. On a few pages of a web application, the content is larger than the frame and a scroll bar appears on the right but when the scroll bar moves up or down the content does not scroll with it. So you can "scroll" the scroll bar but the content itself was inaccessible even though the scroll bar was mobile. The issue only occurs in the "Multi-Process Windows" debug mode option but not in the "Single-Process Windows" option. The scroll bar works perfectly fine in Firefox, IE, and Chrome, just not in Safari. Because there's a lot of legacy code, I'm not quite sure exactly what the actual content is and which specific html elements are relevant. From what I can tell there's an Iframe element, html element, body element, div element, iframe element html element, body element and finally some divs. edit Does it matter if some of the elements within the <iframe> have the attribute scrolling="no"? I see this on a few of the elements within iframe but my coworker reassures me they don't matter.

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• php code in FTP to backup db using URL

  - by Giom

  I fund and inserted this code in my FTP in a backup.php that works great but it copy the file into the root folder (homez/) 1- I would like to put these backup files in a homez/backupDB any idea where to put this path? 2- the db backup files (DB.sql.bz2) have always the same name, is it possible to name each one with the date of creation? (I launch this php with the URL link) <? echo "Votre base est en cours de sauvegarde....... "; $db="nom_de_ma_base"; $status=system("mysqldump --host=mysql5-1.perso --user=$_POST[login] --password=$_POST[password] $db > ../$db.sql"); echo $status; echo "Compression du fichier..... "; system("bzip2 -f ../$db.sql"); echo "C'est fini. Vous pouvez récupérer la base par FTP \n "; ?> Thanks!

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• Pulling name value pair from a structured adsense code block contained in a txt file

  - by Scott B

  I have a txt file which contains a google adsense code block and I'm trying to pull in the file via file_get_contents to extract the values of the google_ad_client and google_ad_slot variables. In the examples below, I want to return to my calling function: $google_ad_client = 'pub-1234567890987654'; $google_ad_slot = '1234567890' The file may contain one of either of these two formats and I wont know which the user has chosen: Newer Ad Unit Style <script type="text/javascript"><!-- google_ad_client = "pub-1234567890987654"; google_ad_slot = "1234567890"; google_ad_width = 336; google_ad_height = 280; //--> </script> <script type="text/javascript" src="path-to-google-script"></script> Classic Style <script type="text/javascript"><!-- google_ad_client = "pub-1234567890987654"; /* 336x280, created 8/6/09 */ google_ad_slot = "1234567890"; google_ad_width = 336; google_ad_height = 280; google_ad_format="336x280_as"; google_ad_type="text_image"; google_color_border="FFFFFF"; google_color_bg="FFFFFF"; google_color_link="2200CC"; google_color_url="000000"; google_color_text="777777"; //--> </script>

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• C# Debug.Assert-s use the same error message. Should I promote it to a static variable?

  - by Hamish Grubijan

  I love Asserts but not code duplication, and in several places I use a Debug.Assert which checks for the same condition like so: Debug.Assert(kosherBaconList.SelectedIndex != -1, "An error message along the lines - you should not ever be able to click on edit button without selecting a kosher bacon first."); This is in response to an actual bug, although the actual list does not contain kosher bacon. Anyhow, I can think of two approaches: private static readonly mustSelectKosherBaconBeforeEditAssertMessage = "An error message along the lines - you should not ever be able to " + "click on edit button without selecting a something first."; ... Debug.Assert( kosherBaconList.SelectedIndex != -1, mustSelectKosherBaconBeforeEditAssertMessage) or: if (kosherBaconList.SelectedIndex == -1) { AssertMustSelectKosherBaconBeforeEdit(); } ... [Conditional("DEBUG")] private void AssertMustSelectKosherBaconBeforeEdit() { // Compiler will optimize away this variable. string errorMessage = "An error message along the lines - you should not ever be able to " + "click on edit button without selecting a something first."; Debug.Assert(false, errorMessage); } or is there a third way which sucks less than either one above? Please share. General helpful relevant tips are also welcome.

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• an better way to do this code

  - by user295189

  myarray[] = $my[$addintomtarray] //52 elements for ($k=0; $k <= 12; $k++){ echo $myarray[$k].' '; } echo ''; for ($k=13; $k < 26; $k++){ echo $myarray[$k].' '; } echo ''; for ($k=26; $k < 39; $k++){ echo $myarray[$k].' '; } echo ''; for ($k=39; $k <= 51; $k++){ echo $myarray[$k].' '; } how to shorten this array code...all I am doing here is splitting an array of 52 elements into 4 chunck of 13 elements each. In addition I am adding formation with br and space thanks

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• Segmentation fault on returning from main (very short and simple code, no arrays or pointers)

  - by Gábor Kovács

  I've been wondering why the following trivial code produces a segmentation fault when returning from main(): //Produces "Error while dumping state (probably corrupted stack); Segmentation fault" #include <iostream> #include <fstream> #include <vector> using namespace std; class Test { vector<int> numbers; }; int main() { Test a; ifstream infile; cout << "Last statement..." << endl; // this gets executed return 0; } Interestingly, 1) if only one of the two variables is declared, I don't get the error, 2) if I declare a vector variable instead of an object with a vector member, everything's fine, 3) if I declare an ofstream instead of an ifstream, again, everything works fine. Something appears to be wrong with this specific combination... Could this be a compiler bug? I use gcc version 3.4.4 with cygwin. Thanks for the tips in advance. Gábor

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• Entity Framework one-to-one relationship mapping flattened in code

  - by Josh Close

  I have a table structure like so. Address: AddressId int not null primary key identity ...more columns AddressContinental: AddressId int not null primary key identity foreign key to pk of Address County State AddressInternational: AddressId int not null primary key identity foreign key to pk of Address ProvinceRegion I don't have control over schema, this is just the way it is. Now, what I want to do is have a single Address object. public class Address { public int AddressId { get; set; } public County County { get; set; } public State State { get; set } public ProvinceRegion { get; set; } } I want to have EF pull it out of the database as a single entity. When saving, I want to save the single entity and have EF know to split it into the three tables. How would I map this in EF 4.1 Code First? I've been searching around and haven't found anything that meets my case yet. UPDATE An address record will have a record in Address and one in either AddressContinental or AddressInternational, but not both.

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• C# code simple console program not working

  - by Wast334

  I am trying to test some console ability in C#.. I can't get this code to work using System; using System.Collections.Generic; using System.Linq; using System.Text; namespace ConsoleApplication1 { class Program { static void Main(string[] args) { Dim myMessage; myMessage = @"Hello World"; printf(@"%@", myMessage); return 0; } } } I am getting a bunch of compiler errors i am not sure what I am doing wrong..? Error 1 The type or namespace name 'Dim' could not be found (are you missing a using directive or an assembly reference?) C:\Documents and Settings\wstevens\Local Settings\Application Data\Temporary Projects\ConsoleApplication1\Program.cs 12 13 ConsoleApplication1 Error 2 The name 'printf' does not exist in the current context C:\Documents and Settings\wstevens\Local Settings\Application Data\Temporary Projects\ConsoleApplication1\Program.cs 14 13 ConsoleApplication1 Error 3 Since 'ConsoleApplication1.Program.Main(string[])' returns void, a return keyword must not be followed by an object expression C:\Documents and Settings\wstevens\Local Settings\Application Data\Temporary Projects\ConsoleApplication1\Program.cs 15 13 ConsoleApplication1

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• Splitting Code into Headers/Source files

  - by cam

  I took the following code from the examples page on Asio class tcp_connection : public boost::enable_shared_from_this<tcp_connection> { public: typedef boost::shared_ptr<tcp_connection> pointer; static pointer create(boost::asio::io_service& io_service) { return pointer(new tcp_connection(io_service)); } tcp::socket& socket() { return socket_; } void start() { message_ = make_daytime_string(); boost::asio::async_write(socket_, boost::asio::buffer(message_), boost::bind(&tcp_connection::handle_write, shared_from_this(), boost::asio::placeholders::error, boost::asio::placeholders::bytes_transferred)); } private: tcp_connection(boost::asio::io_service& io_service) : socket_(io_service) { } void handle_write(const boost::system::error_code& /*error*/, size_t /*bytes_transferred*/) { } tcp::socket socket_; std::string message_; }; I'm relatively new to C++ (from a C# background), and from what I understand, most people would split this into header and source files (declaration/implementation, respectively). Is there any reason I can't just leave it in the header file if I'm going to use it across many source files? If so, are there any tools that will automatically convert it to declaration/implementation for me? Can someone show me what this would look like split into header/source file for an example (or just part of it, anyway)? I get confused around weird stuff like thistypedef boost::shared_ptr<tcp_connection> pointer; Do I include this in the header or the source? Same with tcp::socket& socket() I've read many tutorials, but this has always been something that has confused me about C++.

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• Code refactoring c# question around several if statements performing the same check

  - by James Radford

  I have a method that has a load of if statements that seems a bit silly although I'm not sure how to improve the code. Here's an example. This logic was inside the view which is now in the controller which is far better but is there something I'm missing, maybe a design pattern that stops me having to check against panelCount < NumberOfPanelsToShow and handling the panelCount every condition? Maybe not, just feels ugly! Many thanks if (model.Train && panelCount < NumberOfPanelsToShow) { panelTypeList.Add(TheType.Train); panelCount++; } if (model.Car && panelCount < NumberOfPanelsToShow) { panelTypeList.Add(TheType.Car); panelCount++; } if (model.Hotel && panelCount < NumberOfPanelsToShow) { panelTypeList.Add(TheType.Hotel); panelCount++; } ...

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• Error in bisection method code in Matlab

  - by Amanda Collins

  I need to write a proper implementation of the bisection method, which means I must address all possible user input errors. Here is my code: function [x_sol, f_at_x_sol, N_iterations] = bisection(f, xn, xp, eps_f, eps_x) % solving f(x)=0 with bisection method % f is the function handle to the desired function, % xn and xp are borders of search, % f(xn)<0 and f(xp)>0 required, % eps_f defines how close f(x) should be to zero, % eps_x defines uncertainty of solution x if(f(xp) < 0) error('xp must be positive') end; if(f(xn)>0) error('xn must be negative') end; if (xn >= xp) error ('xn must be less than xp') end; xg=(xp+xn)/2; %initial guess fg=f(xg); % initial function evaluation N_iterations=1; while ( (abs(fg) > eps_f) & (abs(xg-xp) > eps_x) ) if (fg>0) xp=xg; else xn=xg; end xg=(xp+xn)/2; %update guess fg=f(xg); %update function evaluation N_iterations=N_iterations+1; end x_sol=xg; %solution is ready f_at_x_sol=fg; if (f_at_x_sol > eps_f) error('No convergence') end and here is the error message I receive when I try to test this in Matlab: >> bisection(x.^2, 2, -1, 1e-8, 1e-10) Attempted to access f(-1); index must be a positive integer or logical. Error in bisection (line 9) if(f(xp)<0) I was attempting to see if my error codes worked, but it doesn't look like they do. I get the same error when I try to test it on a function that should work.

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• Translate Prototype code into Jquery version

  - by user1055495

  I everybody, I'm working on a SaaS application and I need to use Jquery instead of Prototype due to some extra plugins integration. My code that was wotking a charm with Prototype is not running anymore with Jquery and I'm not used to write in this framework... Is there someone to help me in "translating" this one: Thanks a lot for your help. var rates = new Array(); <% for tva_rate in @tva_rates -%> rates.push(new Array(<%= tva_rate.id %>, '<%=h tva_rate.taux %>', '<%=h tva_rate.compte_id %>' )); <% end -%> function tvaSelected() { tva_id = $('journal_tva_id').getValue(); show = 1; if (tva_id > 0){ rates.each(function(rate) { if (rate[0] == tva_id) { $('journal_taux').setValue(rate[1]); $('journal_compte_tva').setValue(rate[2]); show = 2; } }); } if (show == 1) { $('tva_taux_field').hide(); } else { $('tva_taux_field').show(); } } document.observe('dom:loaded', function() { tvaSelected(); $('journal_tva_id').observe('change', tvaSelected); });

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• How to Implement Backbone Java Logic Code into Android

  - by lord_sneed

  I wrote a program to work from the console in Eclipse and the terminal window in Linux. I am now transforming it into an Android app and I have the basic functionality of the Android UI done up until the point where it needs to use the logic from the Java file of the program I wrote. All of my inputs from the Java file are currently from the keyboard (from Scanners). My question is: how do I transform this to get it work with the user interaction of the app? The only input would be from the built in NumberPicker. Should I copy and paste the code from the Java program to the activity file in the onCreate method and change all of the input methods (Scanners) to work with the Android input? Or do I create variables in the activity file and pass them to the Java program (in the separate class)? (If so, how would I do that? the Java file starts from the main method: public static void main(String[] args) {) Also, will the print statements I have, System.out.println(...);, translate directly into the Android UI and print on the screen or do I have to modify those?

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• How to use interfaces in exception handling

  - by vikp

  Hi, I'm working on the exception handling layer for my application. I have read few articles on interfaces and generics. I have used inheritance before quite a lot and I'm comfortable with in that area. I have a very brief design that I'm going to implement: public interface IMyExceptionLogger { public void LogException(); // Helper methods for writing into files,db, xml } I'm slightly confused what I should be doing next. public class FooClass: IMyExceptionLogger { // Fields // Constructors } Should I implement LogException() method within FooClass? If yes, than I'm struggling to see how I'm better of using an interface instead of the concrete class... I have a variety of classes that will make a use of that interface, but I don't want to write an implementation of that interface within each class. In the same time If I implement an interface in one class, and then use that class in different layers of the application I will be still using concrete classes instead of interfaces, which is a bad OO design... I hope this makes sense. Any feedback and suggestions are welcome. Please notice that I'm not interested in using net4log or its competitors because I'm doing this to learn. Thank you Edit: Wrote some more code. So I will implement variety of loggers with this interface, i.e. DBExceptionLogger, CSVExceptionLogger, XMLExceptionLogger etc. Than I will still end up with concrete classes that I will have to use in different layers of my application.

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• Using TXMLDocument to serialize form settings to XML and database.

  - by LukLed

  I have an interface: type IXMLSerializable = interface function SaveToXML : DOMString; function SaveToXMLDocument : IXMLDocument; procedure LoadFromXML(AXML : DOMString); end; It is used to serialize some settings of forms or frames to xml. Simple implementation: SaveToXMLDocument: function TSomething.SaveToXMLDocument: IXMLDocument; begin Result := TXMLDocument.Create(nil); with Result do begin Active := True; with AddChild(Self.Name) do begin AddChild(edSomeTextBox.Name).Attributes['Text'] := edSomeTextBox.Text; end; end; Result := XMLDoc; end; LoadFromXML: procedure TSomething.LoadFromXML(AXML: DOMString); var XMLDoc : IXMLDocument; I : Integer; begin XMLDoc := TXMLDocument.Create(nil); with XMLDoc do begin LoadFromXML(AXML); Active := True; with ChildNodes[0] do begin for I := 0 to ChildNodes.Count-1 do begin If ChildNodes[I].NodeName = 'edSomeTextBox' then edSomeTextBox.Text := ChildNodes[I].Attributes['Text']; end; end; end; end; SaveToXML: function TSomething.SaveToXML: DOMString; begin SaveToXMLDocument.SaveToXML(Result); end; DOMString result of SaveToXML is saved to database to blob field. I had some encoding issues with other implementations and this one works fine (right now). Do you see any dangers in this code? Can I have issues with different settings on various machines and systems?

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