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How can I create a list of classes in C# to iterate over in a loop

Suppose I have class animal and classes cat and dog extending it. I want to do something along the lines of: foreach (class a in {cat, dog}) if (a.isValid(parameters)) doStuff(); isValid is a static method from animal that just checks if the given parameters define an object of the given type doStuff means I'm doing stuf...

Creating a list in Python with multiple copies of a given object in a single line.

Suppose I have a given Object (a string "a", a number - let's say 0, or a list ['x','y'] ) I'd like to create list containing many copies of this object, but without using a for loop: L = ["a", "a", ... , "a", "a"] or L = [0, 0, ... , 0, 0] or L = [['x','y'],['x','y'], ... ,['x','y'],['x','y']] I'm especially interested in the th...

Removing empty space with jQuery after deleting Selectable item

I have two ordered lists and user can move items between them. I am using jQuery UI's Selectable for both of them. Problem is that when I move item from the middle of the list it leaves an empty space behind. How can I make list shrink according to the how many items is actually in the list? HTML <ol id="allUnits"> <li class="ui-st...

LinkedList memory consumption versus List when working with large arrays

Hi, Can anyone tell me if a linkedlist of structures will be allowed to grow larger than the equivalent List (given that a list uses a doubling strategy for increasing the size of it's internal array). So given a struct that is say 40 bytes (I know about the 16 bytes and structure thing, but I am working with some legacy code here and ...

How can I turn a single element in a list into multiple elements using Python?

I have a list of elements, and each element consists of four seperate values that are seperated by tabs: ['A\tB\tC\tD', 'Q\tW\tE\tR', etc.] What I want is to create a larger list without the tabs, so that each value is a seperate element: ['A', 'B', 'C', 'D', 'Q', 'W', 'E', 'R', etc.] How can I do that in Python? I need it for my cou...

Java: ListA.addAll(ListB) fires NullPointerException?

The err part is Capitalized in the code, it also comes in foreaching. Because of the abstract list, it cannot be initialized, declaration is in a static field. The lists have the same type. import java.util.*; public class Test { public static final List<String> highPrio = Arrays.asList("*","/"); public static List<Str...

has any simply way to delete a value in list of python

a=[1,2,3,4] b=a.index(6) del a[b] print a it show error: Traceback (most recent call last): File "D:\zjm_code\a.py", line 6, in <module> b=a.index(6) ValueError: list.index(x): x not in list so i have to do this : a=[1,2,3,4] try: b=a.index(6) del a[b] except: pass print a but this is not simple,has any simply w...

Implementing a very simple 'Wine Rating System' in Haskell

Hello, I have just started learning Haskell and have got stumped on how to add a rating to a custom data type. The data type I'm using has a name, a year and a tuple (userName and their rating), it looks like: data Wine = Wine String Int [Rating] deriving (Eq,Ord,Show,Read) type Rating = (String, Int) I wanted to allow a user to rate...

Java Collections.rotate() with an array doesn't work

I have the following Java code: import java.util.Arrays; import java.util.Collections; public class Test { public static void main(String[] args) { int[] test = {1,2,3,4,5}; Collections.rotate(Arrays.asList(test), -1); for(int i = 0; i < test.length; i++) { System.out.println(test[i]); } } } I want th...

right-to-left unordered list

hi all, i am trying to make an unordered list to behave in different browsers. i have a 2 level list which i am trying to display horizontally in one line. on safari and firefox everything looks good. on IE (7) everything goes nuts for some reason, and only when i am trying to make the list go right-to-left. when i try displaying it left...

filter lists that are split by easylistsplitter.js?

Hi Everyone, At my site - jasondaydesign.com. I'm using easylistsplitter.js. I designed it this way, because I actually wanted a masonry.js style layout but I couldn't find a way to filter divs. So I made the switch to lists, and found a plugin that allowed me to have a masonry style layout. Unfortunately, I have tried several list fil...

C# - generic List and ConvertAll() Method, how does it internally work?

Hello, from some code I found in Sacha Barbers free mvvm framework chinch I saw this: return new DispatcherNotifiedObservableCollection<OrderModel>( DataAccess.DataService.FetchAllOrders( CurrentCustomer.CustomerId.DataValue).ConvertAll( new Converter<Order, OrderM...

Need help to create a PHP echo script from a range of numbers.

I need a simple script that reads a number from POST (we'll call the value 'number'). It will be a three digit number that must range from the following: 301-340 401-440 501-540 601-640 701-740 801-840 If it doesn't fall in these ranges, I need to echo a message. How would one do this? ...

Possible to get list item (<li>) label with JavaScript?

If I've got a ul with 3 items in it and the list-style-type is set to lower-alpha, I end up with this a. Item 1 b. Item 2 c. Item 3 With jQuery, I can easily get the value of any item you click - "Item 1" if I click the first. But can I get the list item label? In this case a? ...

Simple Ticker (jQuery)

<ul> <li><a href="#">one</a></li> <li><a href="#">two</a></li> <li><a href="#">three</a></li> </ul> I'd like to show only one li at a time using slide effect, thats it. I'd like to avoid using plugins for something as simple as this. Thanks in advance for your help. ...

Python: Is there a way to split a string of numbers into every 3rd number?

For example, if I have a string a=123456789876567543 could i have a list like... 123 456 789 876 567 543 ...

How can I store a list of rows in a spreadsheet cell?

Is there a good method of storing a list of rows in a cell and then detecting whether a certain row is in that list? The method I have seems a bit over the top. I label each row with a prime number, then store the list of rows as the product of each prime, missing out the rows I don't want in my list. Detecting whether a given row is...

Is there an easy way to copy an iterator into a list in Java?

I want something like this: public void CopyIteratorIntoList(Iterator<Foo> fooIterator) { List<Foo> fooList = new ArrayList<Foo>(); fooList.addAll(fooIterator); } which should be equivalent to: public void CopyIteratorIntoList(Iterator<Foo> fooIterator) { List<Foo> fooList = new ArrayList<Foo>(); while(fooIterator.has...

how can I validate column names and count in an List array? C#

I'm trying to get this resolved in .NET 2.0 and unfortunately that is not negotiable. I am reading in a csv file with columns of data that 'should' correspond to a List of tickers in IdentA with some modifications. The csv file columsn would read: A_MSFT,A_CSCO,_A_YHOO,B_MSFT,B_CSCO,B_YHOO,C_MSFT,C_CSCO,C_YHOO IdentA[0]="MSFT" IdentA[1...

Can i get the generic type of an object?

this is my method: GetListItemsPainted<T>(List<T> list) and i don't know what type is that list of, how can i create new list that would have the passed list type? something like this: List<list.GetType()> newList = new List<list.GetType()>(); how can i cast my list to the real type so i would have all his properties etc.? thanks ...