class literals - Page 693

Faster way to convert from a String to generic type T when T is a valuetype?

- by Kumba

Does anyone know of a fast way in VB to go from a string to a generic type T constrained to a valuetype (Of T as Structure), when I know that T will always be some number type? This is too slow for my taste: Return DirectCast(Convert.ChangeType(myStr, GetType(T)), T) But it seems to be the only sane method of getting from a String -- T. I've tried using Reflector to see how Convert.ChangeType works, and while I can convert from the String to a given number type via a hacked-up version of that code, I have no idea how to jam that type back into T so it can be returned. I'll add that part of the speed penalty I'm seeing (in a timing loop) is because the return value is getting assigned to a Nullable(Of T) value. If I strongly-type my class for a specific number type (i.e., UInt16), then I can vastly increase the performance, but then the class would need to be duplicated for each numeric type that I use. It'd almost be nice if there was converter to/from T while working on it in a generic method/class. Maybe there is and I'm oblivious to its existence?

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best PHP programming approach?

- by Nazmin

Hello guys, i guess that many of us has acceptable years of experience in PHP programming, me myself got 5 years programming in PHP since in University (not very solid), i just want to gather some suggestion here, what is better approach in PHP OOP? Since there is a lot of PHP framework out there as well as javascript framework, can anyone share their experience in using one of them as well as using both of the PHP and javascript framework together especially for developing enterprise system? (my company want to start using framework, ISP company) if someone has his/her own framework or class or php file so on and so forth, mind to share? now I've only database connection class. I've never use any php framework before, just jquery as javascript framework, my company has a messed up of programming approach because they did not actually a software house, so all the files are scattered across the server, I see that there are some question before about the framework but i just want to know you all approaches on OOP and in developing massive web apps using PHP, or maybe someone kind enough to share their solid written class. Also pro's and con's of all this things. Thanks in advance.

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java.lang.ClassNotFoundException: com.mysql.jdbc.Driver When run jar file

- by user1024858

Hi all, Connection conn = null; String url = "jdbc:mysql://localhost:3306/"; String dbName = "test"; String driver = "com.mysql.jdbc.Driver"; String userName = "root"; String password = "admin"; try { Class.forName(driver).newInstance(); conn = DriverManager.getConnection(url+dbName,userName,password); System.out.println("Connected to the database"); conn.close(); System.out.println("Disconnected from database"); } catch (Exception e) { e.printStackTrace();} I run in eclipse it's ok, but i built to jar file and run on command line java -jar Test.jar i get this error: java.lang.ClassNotFoundException: com.mysql.jdbc.Driver at java.net.URLClassLoader$1.run(Unknown Source) at java.net.URLClassLoader$1.run(Unknown Source) at java.security.AccessController.doPrivileged(Native Method) at java.net.URLClassLoader.findClass(Unknown Source) at java.lang.ClassLoader.loadClass(Unknown Source) at sun.misc.Launcher$AppClassLoader.loadClass(Unknown Source) at java.lang.ClassLoader.loadClass(Unknown Source) at java.lang.Class.forName0(Native Method) at java.lang.Class.forName(Unknown Source) Please help me how to fix it. Thanks!!!

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Jquery- Get the value of first td in table

- by Jerry

Hello. I am trying to get the value of first td in each tr when a users clicks "click". The result below will output aa ,ee or ii. I was thinking about using clesest('tr')..but it always output "Object object". Not sure what to do on this one. Thanks. My html is <table> <tr> <td>aa</td> <td>bb</td> <td>cc</td> <td>dd</td> <td><a href="#" class="hit">click</a></td> </tr> <tr> <td>ee</td> <td>ff</td> <td>gg</td> <td>hh</td> <td><a href="#" class="hit">click</a></td> </tr> <tr> <td>ii</td> <td>jj</td> <td>kk</td> <td>ll</td> <td><a href="#" class="hit">click</a></td> </tr> </table> Jquery $(".hit").click(function(){ var value=$(this).// not sure what to do here alert(value) ; });

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Operator overloading in generic struct: can I create overloads for specific kinds(?) of generic?

- by Carson Myers

I'm defining physical units in C#, using generic structs, and it was going okay until I got the error: One of the parameters of a binary operator must be the containing type when trying to overload the mathematical operators so that they convert between different units. So, I have something like this: public interface ScalarUnit { } public class Duration : ScalarUnit { } public struct Scalar<T> where T : ScalarUnit { public readonly double Value; public Scalar(double Value) { this.Value = Value; } public static implicit operator double(Scalar<T> Value) { return Value.Value; } } public interface VectorUnit { } public class Displacement : VectorUnit { } public class Velocity : VectorUnit { } public struct Vector<T> where T : VectorUnit { #... public static Vector<Velocity> operator /(Vector<Displacement> v1, Scalar<Duration> v2) { return new Vector<Velocity>(v1.Magnitude / v2, v1.Direction); } } There aren't any errors for the + and - operators, where I'm just working on a Vector<T>, but when I substitute a unit for T, suddenly it doesn't like it. Is there a way to make this work? I figured it would work, since Displacement implements the VectorUnit interface, and I have where T : VectorUnit in the struct header. Am I at least on the right track here? I'm new to C# so I have difficulty understanding what's going on sometimes.

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How to reduce the Number of threads running at instance in jetty server ?

- by Thirst for Excellence

i would like to reduce the live threads on server to reduce the bandwidth consumption for data(data pull while application launching time) transfer from my application to clients in my application. i did setting like is this setting enough to reduce the bandwidth consumption on jetty server ? Please help me any one 1) in Jetty.xml: <Set name="ThreadPool"> <New class="org.eclipse.jetty.util.thread.QueuedThreadPool"> <name="minThreads"> 1 > <Set name="maxThreads" value=50> 2: services-config.xml channel-definition id="my-longpolling-amf" class="mx.messaging.channels.AMFChannel" endpoint url="http://MyIp:8400/blazeds/messagebroker/amflongpolling" class="flex.messaging.endpoints.AMFEndpoint" properties <polling-enabled>true</polling-enabled> <polling-interval-seconds>1</polling-interval-seconds> <wait-interval-millis>60000</wait-interval-millis> <client-wait-interval-millis>1</client-wait-interval-millis> <max-waiting-poll-requests>50</max-waiting-poll-requests> </properties> </channel-definition>

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Common methods/implementation across multiple WCF Services

- by Rob

I'm looking at implementing some WCF Services as part of an API for 3rd parties to access data within a product I work on. There are currently a set of services exposed as "classic" .net Web Services and I need to emulate the behaviour of these, at least in part. The existing services all have an AcquireAuthenticationToken method that takes a set of parameters (username, password, etc) and return a session token (represented as a GUID), which is then passed in on calls to any other method (There's also a ReleaseAuthenticationToken method, no guesses needed as to what that does!). What I want to do is implement multiple WCF services, such as: ProductData UserData and have both of these services share a common implementation of Acquire/Release. From the base project that is created by VS2k8, it would appear I will start with, per service: public class ServiceName : IServiceName { } public interface IServiceName { } Therefore my questions would be: Will WCF tolerate me adding a base class to this, public class ServiceName : ServiceBase, IServiceName, or does the fact that there's an interface involved mean that won't work? If "No it won't work" to Question 1, could I change IServiceName so it extends another interface, IServiceBase, thus forcing the presence of Acquire/Release methods, but then having to supply the implementation in each service. Are 1 and 2 both really bad ideas and there's actually a much better solution that, knowing next to nothing about WCF, I just haven't thought of?

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C# and ASP.NET MVC: Using #if directive in a view

- by Mega Matt

Hi all, I've got a conditional compilation symbol I'm using called "RELEASE", that I indicated in my project's properties in Visual Studio. I want some particular CSS to be applied to elements when the RELEASE symbol is defined, and I was trying to do that from the view, but it doesn't seem to be working. My view code looks like this (shortened a bit for demo purposes): <% #if (RELEASE) %> <div class="releaseBanner">Banner text here</div> <% #else %> <div class="debugBanner">Banner text here</div> <% #endif %> With this code, and with the RELEASE symbol set, the 'else' code is running and I'm getting a div with the debugBanner class. So it doesn't seem to think that RELEASE is defined. It's worth noting that my actual C# code in .cs files is recognizing RELEASE and runs the correct code. It's only the view that is giving me the problem. Does anyone have any insight into this? Any help would be appreciated. Thanks.

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EF Code First, how can I achieve two foreign keys from one table to other table?

- by Yoo Matsuo

I've recently downloaded Entity Framework Code First CTP5, and have a trouble with this scenario. I have two tables as follows: Members table ID Name Comments table ID Comment CommentedMemberID CommentMemberID And, the data should be like the following: Members ID Name 1 Mike 2 John 3 Tom Comments ID Comment CommentedMemberID CommentMemberID 1 Good 1 2 2 Good 1 3 3 Bad 2 1 Then, I coded as shown below: public class Member { public int ID {get; set; } public string Name { get; set;} public virtual ICollection Comments { get; set;} } public class Comment { public int ID { get; set; } public string Comment { get; set; } public int CommentedMemberID { get; set; } public int CommentMemberID{ get; set; } public virtual Member CommentedMember { get; set; } public virtual Member CommentMember { get; set; } } public class TestContext : DbContext { public DbSet Members { get; set; } public DbSet Comments { get; set; } } But when I run these models on my cshtml, it gives me errors saying "Cannot create CommentMember instance" or something like that (Sorry, I already changed my models to proceed the EF Code First evaluation, so can't reproduce the same error). I've also tried to use OnModelCreating on the TestContext, but can't find any good instructions and don't know what to do. I saw a blog post of the EF Code First CTP3, and it seems there was a RelatedTo attribute in that version, but now it has gone. Could anyone know how to get it work properly? Or is this a totally wrong way to go with this scenario? Thanks, Yoo

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What new Unicode functions are there in C++0x?

- by luiscubal

It has been mentioned in several sources that C++0x will include better language-level support for Unicode(including types and literals). If the language is going to add these new features, it's only natural to assume that the standard library will as well. However, I am currently unable to find any references to the new standard library. I expected to find out the answer for these answers: Does the new library provide standard methods to convert UTF-8 to UTF-16, etc.? Does the new library allowing writing UTF-8 to files, to the console (or from files, from the console). If so, can we use cout or will we need something else? Does the new library include "basic" functionality such as: discovering the byte count and length of a UTF-8 string, converting to upper-case/lower-case(does this consider the influence of locales?) Finally, are any of these functions are available in any popular compilers such as GCC or Visual Studio? I have tried to look for information, but I can't seem to find anything? I am actually starting to think that maybe these things aren't even decided yet(I am aware that C++0x is a work in progress).

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How to access individual items in Android GridView?

- by source.rar

Hi, I'm trying to create a game with a 9x9 grid with GridView. Each item in the grid is a TextView. I am able to set the initial values of each item in the grid within the getView() method to "0", however I want to change the value of each grid individually after this but have been unable to do so. I tried adding an update() function in my extended GridAdapter class that takes a position and a number to update at that position but this doesnt seem to be working. public void update(int position, int number) { TextView cell; cell = (TextView) getItem(position); if (cell != null) { cell.setText(Integer.toString(number)); } } Doe anyone know how this can be achieved? Here's the whole GridAdapter class in case require, public class SudokuGridAdapter extends BaseAdapter { private Context myContext; private TextView[] myCells; public SudokuGridAdapter(Context c) { myContext = c; myCells = new TextView[9*9]; } @Override public int getCount() { // TODO Auto-generated method stub return 9*9; } @Override public Object getItem(int position) { return myCells[position]; } @Override public long getItemId(int position) { // TODO Auto-generated method stub return 0; } @Override public View getView(int position, View convertView, ViewGroup parent) { TextView cell; if (myCells[position] == null) { cell = myCells[position] = new TextView(myContext); cell.setText("0"); } else { cell = myCells[position]; } return cell; } public void update(int position, int number) { TextView cell; cell = (TextView) getItem(position); if (cell != null) { cell.setText(Integer.toString(number)); } } }

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Domain model for an online WYSYWG webpage generator / runtime

- by CharlieBrown

Hi all, I'm using C#, MVC, NHibernate and StructureMap as my IoC container, and need some ideas regarding my domain model. The application I'm working has two parts: an Authoring part and a Runtime part. The idea is to allow the user to create a webpage in Authoring (mostly a form actually) by choosing from a set of predefined controls. That webpage will be later used as a form in a call center environment (Runtime part), or may be used in an intranet portal, etc. Basically something similar to what a CMS would do. The difference is, of course, that the webpage/form the author generates will be used and fulfilled in runtime, and that authros should be able to freely create the webpage they want without limitations. I have a draft working model that allows a RunController to iterate over the ScriptPage (my class for the "generated webpage") Controls collection and uses partial views to render each of them. Works kind of fine. Basically I have a common ScriptControl class, and then I can create for example a TextInputControl or a DropDownControl by inheriting from that base class. I can also figure out the Authoring part of the app, although that will surely be fun in itself for sure. :) The biggest problem I have now is persistance. In order to be flexible, I want to be able to add more controls, and template controls (think of an Address composite control) in sepparate DLLs, so I think having a relational model that handles very possible control is not the way to go. My current thinking is using a kind of ObjectStore: binary-serializing the ScriptPage object that contains the List collection and deserializing at Runtime, but I'm not sure how good will it work with NHibernate and how good the performance will be. Serializing a small "page" with 10 controls results in 7964 bytes, for example. Any ideas out there? Thanks in advance, excuse the length. ;)

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Adding fields to Django form dynamically (and cleanly)

- by scott

Hey guys, I know this question has been brought up numerous times, but I'm not quite getting the full implementation. As you can see below, I've got a form that I can dynamically tell how many rows to create. How can I create an "Add Row" link that tells the view how many rows to create? I would really like to do it without augmenting the url... # views.py def myView(request): if request.method == "POST": form = MyForm(request.POST, num_rows=1) if form.is_valid(): return render_to_response('myform_result.html', context_instance=RequestContext(request)) else: form = MyForm(num_rows=1) return render_to_response('myform.html', {'form':form}, context_instance=RequestContext(request)) # forms.py class MyForm(forms.Form): def __init__(self, *args, **kwargs): num_rows = kwargs.pop('num_rows',1) super(MyForm, self).__init__(*args, **kwargs) for row in range(0, num_rows): field = forms.CharField(label="Row") self.fields[str(row)] = field # myform.html http://example.com/myform <form action="." method="POST" accept-charset="utf-8"> <ul> {% for field in form %} <li style="margin-top:.25em"> <span class="normal">{{ field.label }}</span> {{ field }} <span class="formError">{{ field.errors }}</span> </li> {% endfor %} </ul> <input type="submit" value="Save"> </form> <a href="ADD_ANOTHER_ROW?">+ Add Row</a>

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Jquery change name attribute

- by kevin

Hi thereive got a jquery function that attempts to change the id, name and class of an elements the id and class change seems to work but for some curious reason, trying to change the name of the element never works, the code is below, any clues would be helpful $(document).ready(function () { $("table select").live("change", function () { var id = $(this).attr('id'); if ($(this).attr('classname') != "selected") { var rowIndex = $(this).closest('tr').prevAll().length; $.getJSON("/Category/GetSubCategories/" + $(this).val(), function (data) { if (data.length > 0) { $("#" + id).attr('classname', 'selected'); $("#" + id).attr('id', 'sel' + rowIndex); $("#" + id).attr('name', 'sel' + rowIndex); // this never works var position = ($('table').get(0)); var tr = position.insertRow(rowIndex + 1); var td1 = tr.insertCell(-1); var td2 = tr.insertCell(-1); td1.appendChild(document.createTextNode('SubCategory')); var sel = document.createElement("select"); sel.name = 'parent_id'; sel.id = 'parent_id'; sel.setAttribute('class', 'unselected'); td2.appendChild(sel); $.each(data, function (GetSubCatergories, Category) { $('#parent_id').append($("<option></option>"). attr("value", Category.category_id). text(Category.name)); }); } }); } }); });

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please help me for performing serch in my program

- by Abid

i want to perform searching in my programe.. i have my class in which i have made a function i.e. public DataTable Search() { string SQL = "Select * from Customer where " + mField + " like '%" + mValue + "%'"; DataTable dt = new DataTable(); dt = dm.GetData(SQL); return (dt); } in which i have made setters and getters for mField and mValue.. where dm is the object of class Datamanagement in which i have made a function GetData i.e. public DataTable GetData(string SQL) { SqlCommand command = new SqlCommand(); SqlDataAdapter dbAdapter = new SqlDataAdapter(); DataTable DataTable = new DataTable(); command.Connection = clsConnection.GetConnection(); command.CommandText = SQL; dbAdapter.SelectCommand = command; dbAdapter.Fill(DataTable); return (DataTable); } and behind the search button, i have written.. private void btnfind_Click(object sender, EventArgs e) { //cust is the object of class customer// if (tbCustName.Text != "") { cust.Field="CustName"; cust.Value = tbCustName.Text; } else if (tbAddress.Text != "") { cust.Value = tbAddress.Text; cust.Field="Address"; } else if (tbEmail.Text != "") { cust.Value = tbEmail.Text; cust.Field="Email"; } else if (tbCell.Text != "") { cust.Value = tbCell.Text; cust.Field = "Cell"; } DataTable dt = new DataTable(); dt = cust.Search(); dgCustomer.DataSource = dt; RefreshGrid(); } where my referesh grid fuction does that : private void RefreshGrid() { DataTable dt = new DataTable(); dt = cust.GetCustomers(); dgCustomer.DataSource = dt; } but this is not working.. i dont knw y.. please help..

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sending address of a variable declared on the stack?

- by kobac

I have a doubt concerning declaring variables, their scope, and if their address could be sent to other functions even if they are declared on the stack? class A{ AA a; void f1(){ B b; aa.f2(&b); } }; class AA{ B* mb; f2(B* b){ mb = b; //... } }; Afterwards, I use my AA::mb pointer in the code. So things I would like to know are following. When the program exits A::f1() function, b variable since declared as a local variable and placed on the stack, can't be used anymore afterwards. What happens with the validity of the AA::mb pointer? It contains the address of the local variable which could not be available anymore, so the pointer isn't valid anymore? If B class is a std::<vector>, and AA::mb is not a pointer anymore to that vector, but a vector collection itself for example. I would like to avoid copying all of it's contents in AA::f2() to a member AA::mb in line mb = b. Which solution would you recommend since I can't assign a pointer to it, because it'll be destroyed when the program exits AA::f2()

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Convert C# (with typed events) to VB.NET

- by Steven

I have an ASPX page (with VB Codebehind). I would like to extend the GridView class to show the header / footer when no rows are returned. I found a C# example online (link) (source). However, I cannot convert it to VB because it uses typed events (which are not legal in VB). I have tried several free C# to VB.NET converters online, but none have worked. Please convert the example to VB.NET or provide an alternate method of extending the GridView class. Notes / Difficulties: If you get an error with DataView objects, specify the type as System.Data.DataView and the type comparison could be the following: If data.[GetType]() Is GetType(System.Data.DataView) Then Since the event MustAddARow cannot have a type in VB (and RaiseEvent event doesn't have a return value), how can I compare it to Nothing in the function OnMustAddARow()? EDIT: The following is a sample with (hopefully) relevant code to help answer the question. namespace AlwaysShowHeaderFooter { public delegate IEnumerable MustAddARowHandler(IEnumerable data); public class GridViewAlwaysShow : GridView { ////////////////////////////////////// // Various member functions omitted // ////////////////////////////////////// protected IEnumerable OnMustAddARow(IEnumerable data) { if (MustAddARow == null) { throw new NullReferenceException("The datasource has no rows. You must handle the \"MustAddARow\" Event."); } return MustAddARow(data); } public event MustAddARowHandler MustAddARow; } }

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Write-Only Reference in C++?

- by Robert Mason

Is there a way to code a write-only reference to an object? For example, suppose there was a mutex class: template <class T> class mutex { protected: T _data; public: mutex(); void lock(); //locks the mutex void unlock(); //unlocks the mutex T& data(); //returns a reference to the data, or throws an exception if lock is unowned }; Is there a way to guarantee that one couldn't do this: mutex<type> foo; T& ref; foo.lock(); ref = foo.data(); foo.unlock(); //I have a unguarded reference to foo now On the other hand, is it even worth it? I know that some people assume that programmers won't deliberately clobber the system, but then, why do we have private variables in the first place, eh? It'd be nice to just say it's "Undefined Behavior", but that just seems a little bit too insecure.

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php search and replace first element in div

- by cnotethegr8

i have a structure that looks like this <div class="table"> <div> <p> name1 </p> <p> title1 </p> </div> <div> <p> name2 </p> <p> title2 </p> </div> <div> <p> name3 </p> <p> title3 </p> </div> </div> and it continues a few hundred more times. what can i write in php that will search ( class="table" div ) and add a class to only the first 'p' in each 'div'?

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An Array returned by a model association is not an Array?

- by Warren

We have a model association that looks something like this: class Example < ActiveRecord::Base has_many :others, :order => 'others.rank' end The rank column is an integer type. The details of these particular models are not really important though as we have found the same problem with other has_many associations between other models. We have also added to the Enumerable module: module Enumerable def method_missing(name) super unless name.to_s[0..7] == 'collect_' method = name.to_s[8..-1] collect{|element| element.send(method)} end end This adds a collect_id method that we can use to get an array of record ids from an array of ActiveRecord objects. So if we use a normal ActiveRecord find :all, we get a nice array which we can then use collect_id on but if we use Example.others.collect_id, we get NoMethodError: undefined method `collect_id' for #<Class:0x2aaaac0060a0> Example.others.class returns "Array" so is it lying or confused? Our solution thus far has been to use it this way: Example.others.to_a.collect_id This works but this seems a bit strange. Why would you have to do that? We are on Ruby 1.8.7 and Rails 2.3.4

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Is there anyway to show a hidden div in the last row of a html table

- by oo

i have an html table. here is a simplified version: <table> <tr> <td><div style="display: none;" class="remove0">Remove Me</div></td> </tr> <tr> <td><div style="display: none;" class="remove1">Remove Me</div></td> </tr> <tr> <td><div class="remove2">Remove Me</div></td> </tr> </table> i have javascript that clicks on Remove Me in the last row and it deletes the html row using: $(this).parents("tr:first").remove(); the issue is that when i remove this last row, i also want the "Remove Me" text to now show up on the second row (which is now the new last row). how would i show this div so that it would dynamically show the "remove me" from the new last row?

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My code is really slow in IE8. But in Safari,firefox,chrome it works great.

- by bamic01

Hello all, iam stuck now, i really hope if somebody can tell me the problems what i really don't see. The problem is is the menubar works great in Safari,FF,Chrome. But when i open IE8 its so slow when i put my mouse cursor on another menu area. Or better the entire menu is just so slow! html id & class are <div class="oe_wrapper"> <ul id="oe_menu" class="oe_menu"> this is my javascript code: $(function () { var $oe_menu = $('#oe_menu'); var $oe_menu_items = $oe_menu.children('li'); var $oe_overlay = $('#oe_overlay'); $oe_menu_items.bind('mouseenter', function () { var $this = $(this); $this.addClass('slided selected'); $this.children('div').css('z-index', '9999').stop(true, true).slideDown(300, function () { $oe_menu_items.not('.slided').children('div').hide(); $this.removeClass('slided'); }); }).bind('mouseleave', function () { var $this = $(this); $this.removeClass('selected').children('div').css('z-index', '1'); }); $oe_menu.bind('mouseenter', function () { var $this = $(this); $this.addClass('hovered'); }).bind('mouseleave', function () { var $this = $(this); $this.removeClass('hovered'); $oe_menu_items.children('div').hide(); }) });

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Java: How ArrayList memory management

- by cka3o4nik

In my Data Structures class we have studies the Java ArrayList class, and how it grows the underlying array when a user adds more elements. That is understood. However, I cannot figure out how exactly this class frees up memory when lots of elements are removed from the list. Looking at the source, there are three methods that remove elements: [code] public E remove(int index) { RangeCheck(index); modCount++; E oldValue = (E) elementData[index]; int numMoved = size - index - 1; if (numMoved 0) System.arraycopy(elementData, index+1, elementData, index, numMoved); elementData[--size] = null; // Let gc do its work return oldValue; } public boolean remove(Object o) { if (o == null) { for (int index = 0; index < size; index++) if (elementData[index] == null) { fastRemove(index); return true; } } else { for (int index = 0; index < size; index++) if (o.equals(elementData[index])) { fastRemove(index); return true; } } return false; } private void fastRemove(int index) { modCount++; int numMoved = size - index - 1; if (numMoved 0) System.arraycopy(elementData, index+1, elementData, index, numMoved); elementData[--size] = null; // Let gc do its work } {/code] None of them reduce the datastore array. I even started questioning if memory free up ever happens, but empirical tests show that it does. So there must be some other way it is done, but where and how? I checked the parent classes as well with no success.

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C++ template type deduction problem

- by hamishmcn

motivation: I would like to create a utility class so that instead of having to write: if( someVal == val1 || someVal == val2 || someVal == val3 ) I could instead write: if( is(someVal).in(val1, val2, val3) ) which is much closer to the mathematical 'a is an element of (b,c,d)' and also would save on a lot of typing when the variable name 'someVal' is long. Here is the code I have so far (for 2 and 3 values): template<class T> class is { private: T t_; public: is(T t) : t_(t) { } bool in(const T& v1, const T& v2) { return t_ == v1 || t_ == v2; } bool in(const T& v1, const T& v2, const T& v3) { return t_ == v1 || t_ == v2 || t_ == v3; } }; However it fails to compile if I write: is(1).in(3,4,5); instead I have to write is<int>(1).in(3,4,5); Which isn't too bad, but it would be better if somehow the compiler could figure out that the type is int with out me having to explicitly specify it. Is there anyway to do this or I am stuck with specifying it explicitly?

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Java scripts conflict on my home page

- by naveen

Search Results

Search found 45316 results on 1813 pages for 'class literals'.

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- by Kumba

- by Nazmin

- by user1024858

- by Jerry

- by Carson Myers

- by Thirst for Excellence

- by Rob

- by Mega Matt

- by Yoo Matsuo

- by luiscubal

- by source.rar

- by CharlieBrown

- by scott

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- by Abid

- by kobac

- by Steven

- by Robert Mason

- by cnotethegr8

- by Warren

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- by cka3o4nik

- by hamishmcn

- by naveen

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