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  • CBlobResult gives pains.... using Visual C++ 2008... opencv

    - by kaushalyjain
    When I type the following code line.. where img_hsv is a Mat image... IplImage abc=img_hsv; // object that will contain blobs of inputImage CBlobResult blobs; // Extract the blobs using a threshold of 100 in the image blobs = CBlobResult(&abc,NULL,100,true); It displays the following error... error C2661: 'CBlobResult::CBlobResult' : no overloaded function takes 4 arguments.. Any help is welcome...!!

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  • Bash: Correct way to Iterate over Map

    - by Lars Tackmann
    In Bash I can create a map (hashtable) with this common construction hput() { eval "$1""$2"='$3' } hget() { eval echo '${'"$1$2"'#hash}' } and then use it like this: hput capitols France Paris hput capitols Spain Madrid echo "$(hget capitols France)" But how do I best iterate over the entries in the map ?. For instance, in Java I would do: for (Map.Entry<String, String> entry : capitols.entrySet()) { System.out.println("Country " + entry.getKey() + " capital " + entry.getValue()); } is there a common way of accomplishing something similar in Bash ?.

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  • Enable PostBack for a ASP.NET User Control

    - by Steven
    When I click my "Query" the values for my user controls are reset. How do I enable PostBack for my user control? myDatePicker.ascx <%@ Control Language="vb" CodeBehind="myDatePicker.ascx.vb" Inherits="Website.myDate" AutoEventWireup="false" %> <%@ Register assembly="AjaxControlToolkit" namespace="AjaxControlToolkit" tagprefix="asp" %> <asp:TextBox ID="DateTxt" runat="server" ReadOnly="True" /> <asp:Image ID="DateImg" runat="server" ImageUrl="~/Calendar_scheduleHS.png" EnableViewState="True" EnableTheming="True" /> <asp:CalendarExtender ID="DateTxt_CalendarExtender" runat="server" Enabled="True" TargetControlID="DateTxt" PopupButtonID="DateImg" DefaultView="Days" Format="ddd MMM dd, yyyy" EnableViewState="True"/> myDatePicker.ascx Partial Public Class myDate Inherits System.Web.UI.UserControl Public Property SelectedDate() As Date? Get Dim o As Object = ViewState("SelectedDate") If o = Nothing Then Return Nothing End If Return Date.Parse(o) End Get Set(ByVal value As Date?) ViewState("SelectedDate") = value End Set End Property End Class Default.aspx <%@ Page Language="vb" AutoEventWireup="false" CodeBehind="Default.aspx.vb" Inherits="Website._Default" EnableEventValidation="false" EnableViewState="true" %> <%@ Register TagPrefix="my" TagName="DatePicker" Src="~/myDatePicker.ascx" %> <%@ Register Assembly="AjaxControlToolkit" Namespace="AjaxControlToolkit" TagPrefix="ajax" %> <%@ Register Assembly="..." Namespace="System.Web.UI.WebControls" TagPrefix="asp" %> <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> <html xmlns="http://www.w3.org/1999/xhtml"> ... <body> <form id="form1" runat="server"> <div class="mainbox"> <div class="query"> Start Date<br /> <my:DatePicker ID="StartDate" runat="server" EnableViewState="True" /> End Date <br /> <my:DatePicker ID="EndDate" runat="server" EnableViewState="True" /> ... <div class="query_buttons"> <asp:Button ID="Button1" runat="server" Text="Query" /> </div> </div> <asp:GridView ID="GridView1" ... > </form> </body> </html> Default.aspx.vb Imports System.Web.Services Imports System.Web.Script.Services Imports AjaxControlToolkit Protected Sub Page_Load(ByVal sender As Object, _ ByVal e As EventArgs) Handles Me.Load End Sub Partial Public Class _Default Inherits System.Web.UI.Page Protected Sub Button1_Click(ByVal sender As Object, _ ByVal e As EventArgs) Handles Button1.Click GridView1.DataBind() End Sub End Class

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  • How do I create a strongly typed BeginForm?

    - by itchi
    I've seen a few examples of people using this syntax for HTML.BeginForm: (Html.BeginForm<Type>(action => action.ActionName(id))) But when I try this syntax all I get is a: The non-generic method System.Web.Mvc.Html.FormExtensions.BeginForm(System.Web.Mvc.HtmlHelper)' cannot be used with type arguments What am I missing?

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  • what is the '<app-directory>' of remote_api in google-app-engine

    - by zjm1126
    http://code.google.com/intl/en/appengine/docs/python/tools/uploadingdata.html the api is : Downloading Data from App Engine To start a data download, run appcfg.py download_data with the appropriate arguments: appcfg.py download_data --config_file=album_loader.py --filename=album_data_archive.csv --kind=Album <app-directory> i want to download data from my gae app zjm1126.appspot.com so i write this in the commond: appcfg.py download_data --config_file=GreetingLoad.py --filename=GreetingLoad.csv but, i don't know how to write the 'app-directory' so , how to write the 'app-directory'.. thanks

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  • nhibernate/fluenthibernate throws StackOverflowException

    - by Gianluca Colucci
    Hi there! In my project I am using NHibernate/FluentNHibernate, and I am working with two entities, contracts and services. This is my contract type: [Serializable] public partial class TTLCContract { public virtual long? Id { get; set; } // other properties here public virtual Iesi.Collections.Generic.ISet<TTLCService> Services { get; set; } // implementation of Equals // and GetHashCode here } and this is my service type: [Serializable] public partial class TTLCService { public virtual long? Id { get; set; } // other properties here public virtual Activity.Models.TTLCContract Contract { get; set; } // implementation of Equals // and GetHashCode here } Ok, so as you can see, I want my contract object to have many services, and each Service needs to have a reference to the parent Contract. I am using FluentNhibernate. So my mappings file are the following: public TTLCContractMapping() { Table("tab_tlc_contracts"); Id(x => x.Id, "tlc_contract_id"); HasMany(x => x.Services) .Inverse() .Cascade.All() .KeyColumn("tlc_contract_id") .AsSet(); } and public TTLCServiceMapping() { Table("tab_tlc_services"); Id(x => x.Id, "tlc_service_id"); References(x => x.Contract) .Not.Nullable() .Column("tlc_contract_id"); } and here comes my problem: if I retrieve the list of all contracts in the db, it works. if I retrieve the list of all services in a given contract, I get a StackOverflowException.... Do you see anything wrong with what I wrote? Have I made any mistake? Please let me know if you need any additional information. Oh yes, I missed to say... looking at the stacktrace I see the system is loading all the services and then it is loading again the contracts related to those services. I don't really have the necessary experience nor ideas anymore to understand what's going on.. so any help would be really really great! Thanks in advance, Cheers, Gianluca.

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  • How to use Contains() in my join

    - by jrep...
    I am trying to get my linq query to replicate my t-sql but I am lost. SELECT * FROM BaiDetail INNER JOIN BaiDetailMap ON BaiDetail.DetailText LIKE '%' + BaiDetailMap.BaiDetailMapSearchText +'%' This is what I have so far... but no go from det in Source from map in Map where det.DetailText.Contains(map.SearchText) select new {det, map} Error Message: Only arguments that can be evaluated on the client are supported for the String.Contains method.

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  • How to do an fetch request with expressions like this on the iPhone?

    - by dontWatchMyProfile
    The documentation has an example on how to retrieve simple values only, rather than managed objects. This remembers a lot SQL using aliases and functions to only retrieve calculated values. So, actually pretty geeky stuff. To get the minimum date from a bunch of records, this is used on the mac: NSFetchRequest *request = [[NSFetchRequest alloc] init]; NSEntityDescription *entity = [NSEntityDescription entityForName:@"Event" inManagedObjectContext:context]; [request setEntity:entity]; // Specify that the request should return dictionaries. [request setResultType:NSDictionaryResultType]; // Create an expression for the key path. NSExpression *keyPathExpression = [NSExpression expressionForKeyPath:@"creationDate"]; // Create an expression to represent the minimum value at the key path 'creationDate' NSExpression *minExpression = [NSExpression expressionForFunction:@"min:" arguments:[NSArray arrayWithObject:keyPathExpression]]; // Create an expression description using the minExpression and returning a date. NSExpressionDescription *expressionDescription = [[NSExpressionDescription alloc] init]; // The name is the key that will be used in the dictionary for the return value. [expressionDescription setName:@"minDate"]; [expressionDescription setExpression:minExpression]; [expressionDescription setExpressionResultType:NSDateAttributeType]; // Set the request's properties to fetch just the property represented by the expressions. [request setPropertiesToFetch:[NSArray arrayWithObject:expressionDescription]]; // Execute the fetch. NSError *error; NSArray *objects = [managedObjectContext executeFetchRequest:request error:&error]; if (objects == nil) { // Handle the error. } else { if ([objects count] > 0) { NSLog(@"Minimum date: %@", [[objects objectAtIndex:0] valueForKey:@"minDate"]; } } [expressionDescription release]; [request release]; Nice, I though - but having a deep look into NSExpression -expressionForFunction:arguments: it turns out that iPhone OS does NOT support the min: function. Well, probably there's a nifty way to use an own function for this kind of stuff on the iPhone as well? Because on thing I'm already worrying about is, how I'm gonna sort a table based on the calculated distance of targets on a map (location-based stuff).

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  • WCF Duplex Interaction with Web Server

    - by Mark Struzinski
    Here is my scenario, and it is causing us a considerable amount of grief at the moment: We have a vendor web service which provides base level telephony functionality. This service has a SOAP api, which we are leveraging to build up a custom UI that is integrated into our in house web apps. The api functions on 2 levels. You make standard client calls into the service to initiate actions, such as Login, Place Call, Hang Up, etc. On a different thread, the service sends events back to the client to alert the user of things that are occurring on the system (agent successfully logged in, call was disconnected, etc). I implemented a WCF service to sit between the web server and the vendor service. This WCF service operates in duplex mode, establishing a 2 way connection with the web server. The web server makes outbound calls to the WCF service, which routes them to the vendor's web service. Events are received back to the WCF service, which passes them onto the web server via a callback channel on the WCF client. As events are received on the web server, they are placed into a hash table with the user's name as the key, and a .NET queue as the value to hold the event. Each event is enqueued to the agent who owns it. On a 2 second interval, the web page polls the web server via an ajax request to get new events for the logged in user. It hits the hash table for the user key, dequeues any events that are present, and serializes them back up to the web page. From there, they are processed in order and appropriate messages are displayed to the user. This implementation performs well in a single user scenario. The second I put more than 1 user on the system, I start getting frequent timeouts with the following CommunicationException: A connection attempt failed because the connected party did not properly respond after a period of time, or established connection failed because connected host has failed to respond We are running Windows Server 2008 R2 both servers. Both the web app and WCF service are running on .NET 3.5. The WCF service is running under the net.tcp protocol in duplex mode. The web app is ASP.NET MVC 2. Has anyone dealt with anything like this scenario? Is there a more efficient way (or a widely accepted pattern) to implement this?

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  • Can simple javascript inheritance be simplified even further?

    - by Will
    John Resig (of jQuery fame) provides a concise and elegant way to allow simple JavaScript inheritance. It was so short and sweet, in fact, that it inspired me to try and simplify it even further (see code below). I've modified his original function such that it still passes all his tests and has the potential advantage of: readability (50% less code) simplicity (you don't have to be a ninja to understand it) performance (no extra wrappers around super/base method calls) consistency with C#'s base keyword Because this seems almost too good to be true, I want to make sure my logic doesn't have any fundamental flaws/holes/bugs, or if anyone has additional suggestions to improve or refute the code (perhaps even John Resig could chime in here!). Does anyone see anything wrong with my approach (below) vs. John Resig's original approach? if (!window.Class) { window.Class = function() {}; window.Class.extend = function(members) { var prototype = new this(); for (var i in members) prototype[i] = members[i]; prototype.base = this.prototype; function object() { if (object.caller == null && this.initialize) this.initialize.apply(this, arguments); } object.constructor = object; object.prototype = prototype; object.extend = arguments.callee; return object; }; } And the tests (below) are nearly identical to the original ones except for the syntax around base/super method calls (for the reason enumerated above): var Person = Class.extend( { initialize: function(isDancing) { this.dancing = isDancing; }, dance: function() { return this.dancing; } }); var Ninja = Person.extend( { initialize: function() { this.base.initialize(false); }, dance: function() { return this.base.dance(); }, swingSword: function() { return true; } }); var p = new Person(true); alert("true? " + p.dance()); // => true var n = new Ninja(); alert("false? " + n.dance()); // => false alert("true? " + n.swingSword()); // => true alert("true? " + (p instanceof Person && p instanceof Class && n instanceof Ninja && n instanceof Person && n instanceof Class));

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  • The patent difference between software and other technologies

    - by hstoerr
    Now and then someone makes a weird argument for software patents. What are the best reasons against software patents? What are the best replies for commonly heard arguments of patent proponents? See also the converse question of the dark side. :-) If you are for patents you might want to answer there to keep the stackoverflow philosophy of answers instead of discussions.

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  • Execute Assembly from Pascal

    - by London
    How can I execute this code from Pascal : MOV EAX, variable1 PUSH EBX, EAX MOV EAX, variable2 POP EBX AND EBX, EAX Where I define method/function arguments in function(variable1, variable2). This is a school assignment I don't know why they are making us do Pascal/Assembly instead of Java/C++ or such. This is not the whole assignment I did do plenty of work before I just need help with this, any help is appreciated thank you

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  • To specify Startup Program in C# Express Edition 2008

    - by Kanini
    I usually do the following at office - Set the startup program for the project to System32\dllhost.exe, and set the command line arguments for the startup program accordingly. This used to work perfectly fine, because I was running Visual Studio 2008. However, one of my developers use C# Express Edition and they need to do a similar thing. We are not sure, where to set this or how to do it? Please suggest how to do this or point us in the right directions.

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  • Doctrine DQL execute passing params

    - by Karim web Developer
    I used this DQL in Doctrine $q->update('product') ->set('quantity','?') ->where('id=?'); $q->execute(array(20,5)); I check the server for the query and this the generated sql UPDATE product SET quantity = '20', updated_at = '5' WHERE (id = '2010-04-26 14:34); So I need to know why the arguments aren't in the correct places?

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  • ASP.NET MVC Beginner's question

    - by Amutha
    Just I am learning MVC,(ofcourse i get enough information from MS Website).I want to quickly clarify some details. 1) What is the use of PartialView in MVC,Is it similar to partial update of Ajax? I am does the partialView modify the HTML DOM structure? 2)Can i use Response.Redirect() in MVC?

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  • MySQL table organization and optimization (Rails)

    - by aguynamedloren
    I've been learning Ruby on Rails over the past few months with no prior programming experience. Lately, I've been thinking about database optimization and table organization. I know there are great books on the subject, but I typically learn by example / as I go. Here's a hypothetical situation: Let's say I am building a social network for a niche community with 250,000 members (users). The users have the ability to attend events. Let's say there are 50,000 past/present/future events. Much like Facebook events, a user can attend any number of events and an event can have any number of attendees. In the database, there would be a table for users and a table for events. Somehow I would have to create an association between the users and events. I could create an "events" column in the users table such that each user row would contain a hash of event IDs, or I could create an "attendees" column in the events table such that each event row would contain a hash of user IDs. Neither of these solutions seem ideal, however. On a users profile page, I want to display the list of events they are associated with, which would require scanning the 50,000 event rows for the user ID of said user if I include an "attendees" column in the events table. Likewise, on an event page, I want to display a list of attendees for the event, which would require scanning the 250,000 user rows for the event ID of said event if I include an "events" column in the users table. Option 3 would be to create a third table that contains the attendee information for each and every event - but I don't see how this would solve any problems. Are these non-issues? Rails makes accessing all of this information easy, but I guess I'm worried about scale. It is entirely possible that I am under-estimating the speed and processing power of modern databases / servers / etc. How long would it take to scan 250,000 user rows for specific event IDs - 10ms? 100ms? 1,000ms? I guess that's not that bad. Am I just over-thinking this?

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  • Phantomjs creating black output from SVG using page.render

    - by Neil Young
    I have been running PhantomJS 1.9.6 happily on a turnkey Linux server for about 4 months now. Its purpose is to take an SVG file and create different sizes using the page.render function. This has been doing this but since a few days ago has started to generate a black mono output. Please see below: The code: var page = require('webpage').create(), system = require('system'), address, output, ext, width, height; if ( system.args.length !== 4 ) { console.log("{ \"result\": false, \"message\": \"phantomjs.rasterize: error need address, output, extension arguments\" }"); //console.log('phantomjs.rasterize: error need address, output, extension arguments'); phantom.exit(1); } else if( system.args[3] !== "jpg" && system.args[3] !== "png"){ console.log("{ \"result\": false, \"message\": \"phantomjs.rasterize: error \"jpg\" or \"png\" only please\" }"); //console.log('phantomjs.rasterize: error "jpg" or "png" only please'); phantom.exit(1); } else { address = system.args[1]; output = system.args[2]; ext = system.args[3]; width = 1044; height = 738; page.viewportSize = { width: width, height: height }; //postcard size page.open(address, function (status) { if (status !== 'success') { console.log("{ \"result\": false, \"message\": \"phantomjs.rasterize: error loading address ["+address+"]\" }"); //console.log('phantomjs.rasterize: error loading address ['+address+'] '); phantom.exit(); } else { window.setTimeout(function () { //--> redner full size postcard page.render( output + "." + ext ); //--> redner smaller postcard page.zoomFactor = 0.5; page.clipRect = {top:0, left:0, width:width*0.5, height:height*0.5}; page.render( output + ".50." + ext); //--> redner postcard thumb page.zoomFactor = 0.25; page.clipRect = {top:0, left:0, width:width*0.25, height:height*0.25}; page.render( output + ".25." + ext); //--> exit console.log("{ \"result\": true, \"message\": \"phantomjs.rasterize: success ["+address+"]>>["+output+"."+ext+"]\" }"); //console.log('phantomjs.rasterize: success ['+address+']>>['+output+'.'+ext+']'); phantom.exit(); }, 100); } }); } Does anyone know what can be causing this? There have been no server configuration changes that I know of. Many thanks for your help.

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  • templates of functions

    - by anotr67
    I'm told to create template of function , that will take 4 arguments : pointer reference pointer to array pointer to function How to perform this task ? I was trying : template<typename TYPE> TYPE biggest(TYPE *L, TYPE $M, TYPE *K[], TYPE *O()) { } but it is wrong.

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  • System.Diagnostics.Process to run processes, send parameters and get output

    - by Lily
    Hi, I am trying to call a process using System.Diagnostics.Process, send it a parameter, just for the sake of trying it out i am sending "-h" which should generate a list of help options and I need the output. So far I have tried, ProcessStartInfo startInfo = new ProcessStartInfo("C:\\agfl\\agfl.exe"); startInfo.WindowStyle = ProcessWindowStyle.Normal; startInfo.CreateNoWindow = false; startInfo.Arguments = "-h"; Process.Start(startInfo); Any help please? Thanks :)

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  • how to write unicode hello world in C on windows

    - by hatchetman82
    im tyring to get this to work: #define UNICODE #define _UNICODE #include <wchar.h> int main() { wprintf(L"Hello World!\n"); wprintf(L"£?, ?, ?!\n"); return 0; } using visual studio 2008 express (on windows xp, if it matters). when i run this from the command prompt (started as cmd /u which is supposed to enable unicode ?) i get this: C:\dev\unicodevs\unicodevs\Debugunicodevs.exe Hello World! -ú8 C:\dev\unicodevs\unicodevs\Debug which i suppose was to be expected given that the terminal does not have the font to render those. but what gets me is that even if i try this: C:\dev\unicodevs\unicodevs\Debugcmd /u /c "unicodevs.exe output.txt" the file produced (even though its UTF-8 encoded) looks like: Hello World! £ì the source file itself is defined as unicode (encoded in UTF-8 without BOM). the compiler output when building: 1------ Rebuild All started: Project: unicodevs, Configuration: Debug Win32 ------ 1Deleting intermediate and output files for project 'unicodevs', configuration 'Debug|Win32' 1Compiling... 1main.c 1.\main.c(1) : warning C4005: 'UNICODE' : macro redefinition 1 command-line arguments : see previous definition of 'UNICODE' 1.\main.c(2) : warning C4005: '_UNICODE' : macro redefinition 1 command-line arguments : see previous definition of '_UNICODE' 1Note: including file: C:\Program Files\Microsoft Visual Studio 9.0\VC\include\wchar.h 1Note: including file: C:\Program Files\Microsoft Visual Studio 9.0\VC\include\crtdefs.h 1Note: including file: C:\Program Files\Microsoft Visual Studio 9.0\VC\include\sal.h 1C:\Program Files\Microsoft Visual Studio 9.0\VC\include\sal.h(108) : warning C4001: nonstandard extension 'single line comment' was used 1Note: including file: C:\Program Files\Microsoft Visual Studio 9.0\VC\include\crtassem.h 1Note: including file: C:\Program Files\Microsoft Visual Studio 9.0\VC\include\vadefs.h 1Note: including file: C:\Program Files\Microsoft Visual Studio 9.0\VC\include\swprintf.inl 1Note: including file: C:\Program Files\Microsoft Visual Studio 9.0\VC\include\wtime.inl 1Linking... 1Embedding manifest... 1Creating browse information file... 1Microsoft Browse Information Maintenance Utility Version 9.00.30729 1Copyright (C) Microsoft Corporation. All rights reserved. 1Build log was saved at "file://c:\dev\unicodevs\unicodevs\unicodevs\Debug\BuildLog.htm" 1unicodevs - 0 error(s), 3 warning(s) ========== Rebuild All: 1 succeeded, 0 failed, 0 skipped ========== any ideas on what am i doing wrong ? similar questions on ST (like this one: http://stackoverflow.com/questions/787589/unicode-hello-world-for-c) seem to refer to *nix builds - as far as i understand setlocale() is not available for windows. i also tried building this using code::blocks/mingw gcc, but got the same results.

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  • Rails layout: 2 cols cache and content_for..

    - by Totty
    Hy, I have a layout that has 2 cols and in every view i have: content_for :main_col and content_for :side_col in some parts of the site, the side_col is always the same and how do i do that being DRY? partial render? i dont think is so good. then it comes to cache.. the content_for is not good to cache... you have better ideias on how to implement this?thanks

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  • PHP: variable-length argument list by reference?

    - by GetFree
    Is it possible to create a PHP function that takes a variable number of parameters all of them by reference? It doesn't help me a function that receives by reference an array of values nor a function that takes its arguments wrapped in an object because I'm working on function composition and argument binding. Don't think about call-time pass-by-reference either. That thing shouldn't even exist.

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