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• Please Explain .NET Delegates

  - by user275561

  So I read MSDN and Stack Overflow. I understand what the Action Delegate does in general but it is not clicking no matter how many examples I do. In general, the same goes for the idea of delegates. So here is my question. When you have a function like this: public GetCustomers(Action<IEnumerable<Customer>,Exception> callBack) { } What is this, and what should I pass to it?

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• Why ruby has to_s and inspect?

  - by prosseek

  The p calls inspect, and puts/print calls to_s for representing its object. If I run class Graph def initialize @nodeArray = Array.new @wireArray = Array.new end def to_s # called with print / puts "Graph : #{@nodeArray.size}" end def inspect # called with p "G" end end if __FILE__ == $0 gr = Graph.new p gr print gr puts gr end I get G Graph : 0Graph : 0 Then, why does ruby has two functions do the same thing? What makes the difference between to_s and inspect? If I comment out the to_s or inspect function, I get as follows. ##

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• C++ Win32 API equivalent of CultureInfo.TwoLetterISOLanguageName

  - by Brian Gillespie

  The .NET framework makes it easy to get information about various locales; the Win32 C++ APIs are a bit harder to figure out. Is there an equivalent function in Win32 to get the two-letter ISO language name given an integer locale ID? In C# I'd do: System.Globalization.CultureInfo ci = new System.Globalization.CultureInfo(1034); string iso = ci.TwoLetterISOLanguageName; // iso == "es" now.

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• User created Validator wont call Client side validation Javascript on 'complex' user control.

  Hi All, I have created a user control (from System.Web.UI.UserControl), and created my own validator for the user control (from System.Web.UI.WebControls.BaseValidator). Everything works ok until I try to get the user control to do client side validation. While trying to debug this issue I have set 'Control to Validate' to a text box instead of the custom user control, and the client side script works fine! It appears to me that it has an a issue with my composite user control I have created. Has anyone encountered this issue before? Has anyone else seen client side validation fail on custom user controls? Some extra info : The composite control is a drop down list and 'loader image', as it is a ajax enabled drop down list (using ICallbackEventHandler). I know that the client side javascript is being written to the page, and have placed an alert('random message') as the first line in the validator function that only appears if it is validating a text box (i.e. not when it is validating my custom control) Language : C# (ASP.NET 2.0) and jQuery 1.2.6 in aspx file : <rms:UserDDL ID="ddlUserTypes" runat="server" PreLoad="true" /> <rms:DDLValidator ID="userTypesVal" ControlToValidate="ddlUserTypes" ErrorMessage="You have not selected a UserType" runat="server" Text="You have not selected a UserType" Display="Dynamic" EnableClientScript="true" /> in validator code behind protected string ScriptBlock { get { string nl = System.Environment.NewLine; return "<script type=\"text/javascript\">" + nl + " function " + ScriptBlockFunctionName + "(ctrl)" + nl + " {" + nl + " alert('Random message'); " + nl + " var selVal = $('#' + ctrl.controltovalidate).val(); " + nl + " alert(selVal);" + nl + " if (selVal === '-1') return false; " + nl + " return false; " + nl + " }" + nl + "</script>"; } } protected override void OnPreRender(EventArgs e) { if (this.DetermineRenderUplevel() && this.EnableClientScript) { Page.ClientScript.RegisterExpandoAttribute(this.ClientID, "evaluationfunction", this.ScriptBlockFunctionName); Page.ClientScript.RegisterClientScriptBlock(GetType(), this.ScriptBlockKey, this.ScriptBlock); } base.OnPreRender(e); } I know my ControlPropertiesValid() and EvaluateIsValid() work ok. I appreciate any help on this issue. Noel.

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• how can we make class with Linked list recursion ...

  - by epsilon_G

  Hi , I'm newbee in The C++ heaven and the OOP, ... I'd like to make some stuffs with the Data structures ... However,I'd like to merge two linked listes ... I made a class before "List" wich contain all what I need to programme something with List ... Add , Display .. The probleme is that I programmed the function "Merge2lists" which give us the third list .. How can I display the third list in the main program after using "Merge2lists" Plz , my prob with the Class and the OOP syntaxe ... try to give me the implementation in the main program ??? Otherwise,How can I apply function given pointer in main program wich declared in class .. Thankx class Liste { private: struct node { int elem ; node *next; }*p; public: LLC(); void Merge2lists (node* a, node * b,node *&result); ~LLC(); }; void List::Merge2lists (node* a, node * b,node *&result) { result = NULL; if (a==NULL) { result=b; return;} else if (b==NULL) { result=a; return;} if (a->elem <= b->elem) { result = a; Merge2lists(a->next, b,result->next); } else { result = b; Merge2lists(a, b->next,result->next); } return; } int main() { liste a ; a.Aff_Val(46); a.Aff_Val(54); a.add_as_first(2); a.add_as_first(1); a.Display(); /*This to displat the elemnts ... Don't care about it it's easy to make*/ list liste2; b.Add(2); b.Add(14); b.Add(16); list result; Merge2lists (a,b,result); /*The probleme is here , how can I use this in my program */

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• ActionScript Tween Yoyo Stops!

  - by TheDarkIn1978

  i want my tween to yoyo until the program is closed, but for some reason my tween is only "yoyoed" about 10 times before it just stops. is this normal? var myTween:Tween = new Tween(boxSprite, "alpha", Regular.easeInOut, 1, 0.25, 1, true); myTween.addEventListener(TweenEvent.MOTION_FINISH, yoyo, false, 0, true); function yoyo(evt:TweenEvent):void { evt.target.yoyo(); }

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• Parsing JSON with eval

  - by Neethusha

  I have this code: function useHttpResponse() { if (xmlhttp.readyState==4 ) { var response = eval('('+xmlhttp.responseText+')'); alert(response); for(i=0;i<response.Users.length;i++) alert(response.Users[i].UserId); } } When i alert, the first alert is "[object Object]" Why is that so? I need to remove that...how?

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• Count total children divs inside a container

  - by kuswantin

  I want to count the total divs inside a container and toggle their visibilities with structure like this. Please also note that the div.content may also reside inside another nested or even nested-nested containers. That's why I handle it with jquery to add div.topmost for each topmost parent container: <div id="parent"> <div class="counter">There are 3 div.contents inside the container below</div> <div class="container"> <div class="content"> 1 </div> <div class="container"> <!--container inside container --> <div class="content"> 2 </div> <div class="content"> 3 </div> </div> </div> <div class="counter">There are 5 div.contents inside the container below</div> <div class="container"> <div class="content"> 1 </div> <div class="content"> 2 </div> <div class="content"> 3 </div> <div class="content"> 4 </div> <div class="content"> 5 </div> </div> </div> And the jquery: // only grab the top most container $('#parent > .container').addClass('topmost'); var topMost = $(".topmost"); var totContent = topMost.children('.content').size(); if (topMost.length > 0) { topMost.before('<div class="toggle">There are ' + totContent + ' div.contents inside the container below</div>'); } topMost.hide(); $('#parent > .counter').click(function() { $(this).next('.topmost').toggle(); //alert(totContent); return false; }); But I can't make it work to loop for each div.counter. The counter always shows all div.content. So placing the each function is suspected to be the problem. Any hep would be very much appreciated. Thanks

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• Virtual functions should not be used excessively - Why ?

  - by GG

  I just read that we should not use virtual function excessively. People felt that less virtual functions tends to have fewer bugs and reduces maintenance. I'm not able to get what kind of bugs and disadvantages can appear due to virtual functions. Thanks,

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• Android: how to detect a private number programmatically

  - by Bao Le

  I use BroadcastReceiver to intercept incoming call on Android phone as below tm = (TelephonyManager) context.getSystemService(Context.TELEPHONY_SERVICE); Bundle bundle = intent.getExtras(); String number = bundle.getString(TelephonyManager.EXTRA_INCOMING_NUMBER); In the "private number" case, I tested on two devices, it shows the number as -1 on HTC Wildfire and -2 on Galaxy S. I checked the android.telephony.PhoneNumberUtils but it could't help me. Is there a function or a generic way to detect a private number on Android phone? Thanks

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• JSON - How can I send null value?

  - by Kim Tranjan

  I want to do something like this $.get('/Controller/Action/', { model : null }, function(data) {}); Unfortunatelly it doesn't work. In server side the value of the model is {object}. How do I get null?

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• shell_exec() Doesn't Show The Output

  - by Nathan Campos

  I'm doing a PHP site that uses a shell_exec() function like this: $file = "upload/" . $_FILES["file"]["name"]; $output = shell_exec("leaf $file"); echo "<pre>$output</pre>"; Where leaf is a program that is located in the same directory of my script, but when I tried to run this script on the server, I just got nothing. What is wrong?

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• PHP: Shortest way to check if a variable contains positive integer?

  - by NAVEED

  I want to check if user input a positive integer number. 1 = true +10 = true .1 = false -1 = false 10.5 = false Just a positive number. No characters. No special character. No dot. No minus sign. I tried is_int() function but it is returning false even on positive integers. Is there a string to int problem? Thanks

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• Incorrect new Uri(base, relative) behaviour in .NET

  - by dr. evil

  When you create a new Uri like this: New Uri(New Uri("http://example.com/test.php"),"?x=y") it returns: http://example.com/?x=y It was supposed to return: http://example.com/test.php?x=y according to the every major browser out there (I'm not quite sure what RFC says though). Is this is a bug or is there any other function out there which behaves correctly, also what's the best way to fix it without reinventing the wheel?

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• How can I insert an additional argument after the last argument in a prolog procedure?

  - by Meko

  I am new to learning prolog, and I want to know, if we have some procedure like father("Nic","Adam"). and I want to write a function that it will add new value to this father("Nic","Adam","something"..) how can I do this? Using list? Or what?

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• accessing parent class inherited variable in subclass in PHP

  - by Abhishek

  I have made a class in php which is goind to be inherited by another class in the other folder. when i put echo $this-protectedvariableofclass; //in subclass function it gives no value remember my base class is stored \class\user.php sublass is stored as \model\model_user.php Please help me out Thanks in advance

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• C++ Class Templates (Queue of a class)

  - by Dalton Conley

  Ok, so I have my basic linked Queue class with basic functions such as front(), empty() etc.. and I have transformed it into a template. Now, I also have a class called Student. Which holds 2 values: Student name and Student Id. I can print out a student with the following code.. Student me("My Name", 2); cout << me << endl; Here is my display function for student: void display(ostream &out) const { out << "Student Name: " << name << "\tStudent Id: " << id << "\tAddress: " << this << endl; } Now it works fine, you can see the basic output. Now I'm declaring a queue like so.. Queue<Student> qstu; Storing data in this queue is fine, I can add new values and such.. now what I'm trying to do is print out my whole queue of students with: cout << qstu << endl; But its simply returning an address.. here is my display function for queues. void display(ostream & out) const { NodePointer ptr; ptr = myFront; while(ptr != NULL) { out << ptr->data << " "; ptr = ptr->next; } out << endl; } Now, based on this, I assume ptr-data is a Student type and I would assume this would work, but it doesn't. Is there something I'm missing? Also, when I Try: ptr->data.display(out); (Making the assumtion ptr-data is of type student, it does not work which tells me I am doing something wrong. Help on this would be much appreciated!

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• How can I catch all ajax requests in javascript ?

  - by Annan

  Is it possible to have a global event handler for ajax requests that automatically gets called when any ajax request returns ? I'm interested in this because I'm making a greasemonkey script for an ajax site. In previous scripts I either ran the main function every few seconds or overwrote parts of the site's javascript, both things that are messy.

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• Which is preferred: foo(void) or foo() in C++

  - by George2

  I have seen two styles of defining conversion operator overload in C++, operator int* (void) const operator int*() const Question 1. I think the two styles (whether add void or not) have the same function, correct? Question 2. Any preference which is better?

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• glCreateShaderObjectARB( GL_FRAGMENT_SHADER_ARB ); crashes !

  - by gutsblow

  Hello there, I have an iMac with ATI Radeon 2600HD which supports Fragment_shader_arb. But whenever I use that function, it crashes the program. Ironically, it works on a windows installation in the same machine without any problems. I'm running OS X 10.6.2; Can anyone please help me out! P.S. Vertex shaders work fine without any problem. Thank you!

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• Drupal - assign menu to block based on node type

  - by ernie

  I want to assign a specific menu in left sidebar block, based on the node type of the page currently being displayed. I think it should look something like this, but I am stuck. function my_module_nodeapi(&$node, $op) { switch ($op) { case 'view': if ($node->type == "large_reptiles") { //menu_set_active_menu_name('menu_reptile_menu'); //menu_set_active_item('menu_reptile_menu'); } break; } }

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• Creating a tooltip over a table cell?

  - by mikey bording

  I have created a HTML table which has a function written in javascript that takes the value of the cursors position within a large table cell and then prints the value into a cell. How would i go about printing the value in a tooltip instead of a table cell?

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• faster alternative to memcpy?

  - by hatorade

  I have a function that is doing memcpy, but it's taking up an enormous amount of cycles. Is there a faster alternative/approach than using memcpy to move a piece of memory?

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• How can I access a JavaScript variable value in JSP?

  - by Pramod

  function modification() { alert(document.getElementById("record").value); var rec=document.getElementById("record").value; <% Connection connect = DriverManager.getConnection("jdbc:odbc:DSN","scott","tiger"); Statement stm=connect.createStatement(); String record=""; // I want value of "rec" here. ResultSet rstmt=stm.executeQuery("select * from "+record); %> }

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• Path parsing in rails

  - by fl00r

  Hi! I am looking for method for parsing route path like this: ActionController::Routing.new("post_path").parse #=> {:controller => "posts", :action => "index"} It should be opposite to url_for Upd I've found out: http://stackoverflow.com/questions/2222522/what-is-the-opposite-of-url-for-in-rails-a-function-that-takes-a-path-and-genera ActionController::Routing::Routes.recognize_path("/posts") So now I need to convert posts_path into "/posts"

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