Is there a way to use a collection of a generic class, without supplying the underlying type ? Let's explain : Here is what I'd like to have : class TimeSerie<TValue> { enter code here } List<TimeSerie<?>> blah; Here is what I have to do so far : class TimeSerie {} class TypedTimeSerie<TValue> : TimeSerie {} List<TimeSerie> blah; ...
The System.Collections.ObjectModel.KeyedCollection class is a very useful alternative to System.Collections.Generic.Dictionary, especially when the key data is part of the object being stored or you want to be able to enumerate the items in order. Unfortunately, the class is abstract, and I am unable to find a general concrete implementa...
Hi. I'm writing a generics class in C++/CLI (VS2008) to store and manage records of different kinds and I need collections to keep them before flusing them to DB/disk/etc. I was thinking in something like this: ref class Record { // ... }; generic<typename T> where T : Record, gcnew() public ref class Factory { public: // ....f...
I am trying to model such situation - there is a cash transfer (I mean a car that carries money), that has required amounts of each currency, and also an actual amount for each currency. And it seems to me pointless to create two separate classes, one for required amount and another for actual amount. So the implementation would look lik...
I'm working on a control for one of our apps. The control shows the currently focused day as a gird, the X-axis being time of day. The Y axis doesn't have a scale as such, rather it will separate out the items to be displayed. The overall look of the control will be quite similar to a gantt chart, showing the times of day of various t...
In some library code, I have a List that can contain 50,000 items or more. Callers of the library can invoke methods that result in strings being added to the list. How do I efficiently check for uniqueness of the strings being added? Currently, just before adding a string, I scan the entire list and compare each string to the to-be...
I am using a PagedCollectionView in Silverlight 3 to group items in a datagrid. I want to detect when the group headers are clicked but after 6 hours still cannot find any way to do this. (So that when a collapsed header is clicked I can dynamically load the group's content) The datagrid is populated like so: PagedCollectionView coll...
I have a problem, trying to render partials in ruby on rails with the short notation for resoures. Somehow, RoR displays simply nothing that has to do with the partial, but i get no errors as well. I mean, the resulting HTML looks like the call for the partial simply wouldn't be there. I'm also confused, because i can see in the log, tha...
Hi All, I am having problem with collection object. Here is the code CarCollection obj=new CarCollection(); obj.Where("Id","10"); obj.Load(); The problem is the result of the records doubles i.e actually there is only 1 record with the id 10 but it returns 2 same records. Please Help me as i am a newbie. Thanks ...
I am aware of http://stackoverflow.com/questions/1174328/passing-a-generic-collection-of-objects-to-a-method-that-requires-a-collection-of How do I do it in .Net 2.0 where I don't have .Cast ??? It has to be reference equality i.e. copies of the list won't do. To re-iterate - I cannot return a new list - it has to be the same list ...
I've been spending some of my spare time working a set of collections for ActionScript 3 but I've hit a pretty serious roadblock thanks for the way ActionScript 3 handles equality checks inside Dictionary Objects. When you compare a key in a dictionary, ActionScript uses the === operator to perform the comparison, this has a bit of a na...
I am using ASP.NET MVC 2 Beta. I can create a wizard like workflow using Steven Sanderson's technique (in his book Pro ASP.NET MVC Framework) except using Session instead of hidden form fields to preserve the data across requests. I can go back and forth between pages and maintain the values in a TextBox without any issue when my model i...
I am writing a method that's intended to return a dictionary filled with configuration keys and values. The method that's building up this dictionary is doing so dynamically, so I need to return this set of keys and values as a collection (probably IDictionary<string, string>). In my various readings (sources escape me at the moment), th...
I have a java list List<myclass> myList = myClass.selectFromDB("where clause"); //myClass.selectFromDB returns a list of objects from DB But I want a different list, specifically. List<Integer> goodList = new ArrayList<Integer>(); for(int i = 0;i++; i<= myList.size()) { goodList[i] = myList[i].getGoodInteger(); } Yes, I could...
public class Start { public Register theReg = new Register(); public static Start go = new Start(); public static void main(String[] args) { Register theReg = new Register(); go.regUsers(); if(theReg.logIn("jsmith","password")) { System.out.println("You're logged in as " + ...
Hi I am trying to profile a memory guzzling biztalk orchestration. This orchestration is using plenty of maps with a few custom script functoids. I wish to identify the lifetime of the custom objects created by orchestration and how are they promoted in the Garbagage collection. Am not able to use the CLR profiler for the same. Looki...
I have three attributes in my XML object: last name, first name, and age. My sample XML looks like: <dataXML> <info last="Abc" first="Def" age="20"/> <info last="Abc" first="Hij" age="10"/> <info last="Xyz" first="Klm" age="25"/> <info last="Xyz" first="Opq" age="64"/> <info last="Xyz" first="Rst" age="08"/> </dataXML> I am using...
I have a method like this: public List<Fruit> Traverse (IEnumerable<Fruit> collection, Action<Fruit> action) I can do this: Traverse (array, f => f.Text); How can I call the action so I get the same element? Traverse (array, f => f); C# compiler doesn't allow me to do this. EDIT: List<Fruit> result = ... foreach (Fruit fruit i...
In some part of my code I am passed a collection of objects of type T. I don't know which concrete colletion I will be passed, other than it impements IEnumerable. At run time, I need to find out which type T is (e.g. System.Double, System.String, etc...). Is there any way to find it out? UPDATE: I should maybe clarify a bit more the ...
I'm going to briefly explain what I want my program to do. I have a lot of Images on my form and I want the image source to change on MouseEnter event. So, if a user moves the mouse over the button, I'd like the button to appear to be glowing. Of course I've made two images for the Image control. One normal, and one glowing. I'm trying...