ienumerable Questions
4
Solved
Does C# offer some nice method to cast a single entity of type T to IEnumerable<T>?
The only way I can think of is something like:
T entity = new T();
IEnumerable<T> = new List { enti...
Uis asked 10/2, 2011 at 16:51
4
Solved
Why cant I use an IEnumerable with params? Will this ever be fixed? I really wish they would rewrite the old libraries to use generics...
Clinic asked 24/1, 2010 at 20:49
5
Solved
How to iterate over items in a Tuple, when I dont know at compile-time what are the types the tuple is composed of? I just need an IEnumerable of objects (for serialization).
private static IEnume...
Coprology asked 11/4, 2017 at 8:56
4
Solved
I have a class of User, which can have several contact numbers. I am using CsvHelper to generate a report on the users, which will create a CSV file of the User's name and contact details. Each con...
Gaddis asked 16/6, 2015 at 8:49
23
Solved
private IEnumerable<string> Tables
{
get
{
yield return "Foo";
yield return "Bar";
}
}
Let's say I want iterate on those and write something like processing #n of #m.
Is there a way ...
Malleolus asked 3/10, 2008 at 21:5
6
Solved
OK, so List<> contains the AsReadOnly() which gives you the ReadOnlyCollection. What I need is to have a field of IList type, and a property which would return a ReadOnlyCollection for this list...
Duax asked 29/8, 2011 at 8:6
6
Solved
I have an IEnumerable<T>. I want to do one thing for each item of the collection, except the last item, to which I want to do something else. How can I code this neatly? In Pseudocode
foreac...
Tritanopia asked 24/5, 2012 at 10:32
7
Solved
I have two instances of IEnumerable<T> (with the same T). I want a new instance of IEnumerable<T> which is the concatenation of both.
Is there a built-in method in .NET to do that or do...
Delois asked 4/1, 2013 at 21:7
13
Solved
I wrote this:
public static class EnumerableExtensions
{
public static int IndexOf<T>(this IEnumerable<T> obj, T value)
{
return obj
.Select((a, i) => (a.Equals(value)) ? i : -1...
Exchangeable asked 17/8, 2009 at 21:37
10
Solved
Is there a built in LINQ method thing I can use to find out if two sequences contains the same items, not taking the order into account?
For example:
{1, 2, 3} == {2, 1, 3}
{1, 2, 3} != {2, 1...
Rakel asked 10/3, 2009 at 13:52
13
What is the difference between IQueryable<T> and IEnumerable<T>?
See also What's the difference between IQueryable and IEnumerable that overlaps with this question.
Craze asked 31/10, 2008 at 7:18
4
Solved
I only watched a few webcasts before I went head first in to designing a few Entity Framework applications. I really didn't read that much documentation and I feel like I am suffering for it now.
I...
Reynoso asked 5/10, 2011 at 1:33
4
Is there an easy way to convert an IEnumerable to TheoryData?
For example, if I want to pass the set of enumeration options, I'm looking for something like:
IEnumerable<TheoryData<MyEnum>&...
Midsummer asked 4/8, 2022 at 0:38
8
Solved
I know it's possible to cast a list of items from one type to another (given that your object has a public static explicit operator method to do the casting) one at a time as follows:
List<Y>...
Swat asked 25/2, 2011 at 8:51
12
Solved
I am trying to do something like this:
image.Layers
which returns an IEnumerable<Layer> for all layers except the Parent layer, but in some cases, I just want to do:
image.Layers.With(image....
Swedenborgianism asked 3/2, 2011 at 19:8
4
Solved
Let's say I for example have this class that generates Fibonacci numbers:
public class FibonacciSequence : IEnumerable<ulong>
{
public IEnumerator<ulong> GetEnumerator()
{
var a = 0U...
Braud asked 2/10, 2009 at 14:54
5
Solved
Given two IEnumerables of the same size, how can I convert it to a Dictionary using Linq?
IEnumerable<string> keys = new List<string>() { "A", "B", "C" };
IEnumerable<string> val...
Disrespectable asked 28/10, 2010 at 1:14
6
Solved
I have an optional parameter of type IEnumerable<int> in my C# method. Can I initialize it with anything but null, e.g. a fixed list of values?
Birdcage asked 10/1, 2013 at 9:56
6
Solved
I am having a Text Like
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Blinders asked 23/8, 2013 at 6:26
20
Solved
Is there a common way to pass a single item of type T to a method which expects an IEnumerable<T> parameter? Language is C#, framework version 2.0.
Currently I am using a helper method (it's...
Shult asked 16/10, 2009 at 12:40
15
If I have an IEnumerable like:
string[] items = new string[] { "a", "b", "c", "d" };
I would like to loop thru all the pairs of consecutive items (sliding w...
Purlin asked 23/2, 2009 at 13:17
24
Solved
I found an example in the VS2008 Examples for Dynamic LINQ that allows you to use a SQL-like string (e.g. OrderBy("Name, Age DESC")) for ordering. Unfortunately, the method included only ...
Lavender asked 3/9, 2008 at 6:30
24
Solved
I found an example in the VS2008 Examples for Dynamic LINQ that allows you to use a SQL-like string (e.g. OrderBy("Name, Age DESC")) for ordering. Unfortunately, the method included only ...
Hawfinch asked 3/9, 2008 at 6:30
24
Solved
I found an example in the VS2008 Examples for Dynamic LINQ that allows you to use a SQL-like string (e.g. OrderBy("Name, Age DESC")) for ordering. Unfortunately, the method included only ...
Troglodyte asked 3/9, 2008 at 6:30
6
Solved
I could not find a related question.
In python you can easily loop through a sequence (list, generator etc) and collect the index of the iteration at the same time thanks to enumerate(seq) like th...
Ointment asked 12/9, 2011 at 13:56
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