tagged [linq-to-objects]
how to query LIST using linq
how to query LIST using linq Suppose if I add person class instance to list and then I need to query the list using linq. Now I want to query the above list with li
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- 4 Feb at 15:13
Output a list/other data structure using linq query
Output a list/other data structure using linq query is there a way to do a Console.WriteLine() on a Generic Collection example: List a has: Is there a way to write out the List contents: Key, Value us...
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- 7 Jul at 05:39
TakeWhile, but get the element that stopped it also
TakeWhile, but get the element that stopped it also I'd like to use the LINQ `TakeWhile` function on LINQ to Objects. However, I also need to know the first element that "broke" the function, i.e. the...
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- 9 Jun at 15:30
why ForEach Linq Extension on List rather than on IEnumerable
why ForEach Linq Extension on List rather than on IEnumerable > [Why is there not a ForEach extension method on the IEnumerable interface?](https://stackoverflow.com/questions/101265/why-is-there-not-...
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- 23 Nov at 14:22
Find() vs. Where().FirstOrDefault()
Find() vs. Where().FirstOrDefault() I often see people using `Where.FirstOrDefault()` to do a search and grab the first element. Why not just use `Find()`? Is there an advantage to the other? I couldn...
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- 15 Dec at 09:15
Sequence contains no elements exception in linq without even using Single
Sequence contains no elements exception in linq without even using Single I am not using `Single` in LINQ below, but I am still getting a 'Sequence contains no elements' exception: This e
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- 28 Jan at 09:40
Code equivalent to the 'let' keyword in chained LINQ extension method calls
Code equivalent to the 'let' keyword in chained LINQ extension method calls Using the C# compilers query comprehension features, you can write code like: In th
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- 7 Jul at 15:37
Basic array Any() vs Length
Basic array Any() vs Length I have a simple array of objects: I want to test if that method returns contacts. I really like the LINQ syntax for `Any()` as it highlights what I am trying to achieve: Ho...
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- 18 Mar at 08:58
LINQ return items in a List that matches any Names (string) in another list
LINQ return items in a List that matches any Names (string) in another list I have 2 lists. 1 is a collection of products. And the other is a collection of products in a shop. I need to be able to ret...
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- 28 Aug at 22:56
LINQ "MaxOrDefault"?
LINQ "MaxOrDefault"? I'm new to LINQ. I need to compute new_id as follows: Is there a LINQ way to compact that expression, so that I don't have to use the
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- 2 May at 15:29
How to update an element with a List using LINQ and C#
How to update an element with a List using LINQ and C# I have a list of objects and I'd like to update a particular member variable within one of the objects. I understand LINQ is designed for query a...
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- 23 Mar at 14:5
Sorting a list using Lambda/Linq to objects
Sorting a list using Lambda/Linq to objects I have the name of the "sort by property" in a string. I will need to use Lambda/Linq to sort the list of objects. Ex: ``` public class Employee { public s...
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- 27 Dec at 07:27
How can I get LINQ to return the object which has the max value for a given property?
How can I get LINQ to return the object which has the max value for a given property? If I have a class that looks like: And a collection of those items... How can I use LINQ to return the single "Ite...
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- 6 Jul at 17:39
Lambda Expression for join
Lambda Expression for join ``` public class CourseDetail { public CourseDetail(); public string CourseId { get; set; } public string CourseDescription { get; set; } public long Cours...
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- 18 Feb at 07:3
Whats the 'modern' way to find common items in two Lists<T> of objects?
Whats the 'modern' way to find common items in two Lists of objects? I have two Generic Lists containing different types, for the sake of example, lets call them `Products` and `Employees`. I'm trying...
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- 26 Jul at 09:10
Use LINQ and C# to make a new List from an old List
Use LINQ and C# to make a new List from an old List This should be pretty simple, but I am new at LINQ. I have a `List` of `FillList` structs. I'd like to use LINQ to create a new `List` where instead...
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- 15 Mar at 06:26
LINQ - is SkipWhile broken?
LINQ - is SkipWhile broken? I'm a bit surprised to find the results of the following code, where I simply want to remove all 3s from a sequence of ints: Why isn't 3 skipped? My next thought was, OK, t...
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- 26 Mar at 22:2
Why does Enumerable.Empty() return an empty array?
Why does Enumerable.Empty() return an empty array? I expected the implementation of Enumerable.Empty() to be just this: But the implementation is something like this: ``` public static IEnumerable Emp...
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- 12 Nov at 14:48
Like operator in LINQ to Objects
Like operator in LINQ to Objects I'm trying to emulate the `LIKE` operator in LINQ to Objects. Here my code: ``` List list = new List(); list.Add("line one"); list.Add("line two"); list.Add("line thre...
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- 2 Nov at 17:43
Is there already a Conditional Zip function in c#?
Is there already a Conditional Zip function in c#? Is there already a function in C# that can perform a "Conditional Zip"? I.e. Is there a function that allows different length inputs and takes a pred...
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- 19 Sep at 13:4
Linq nested list expression
Linq nested list expression please I need your help with a Linq expression: I have nested objects with lists, this is how the main object hierarchy looks like (each dash is an atribute of the sub-clas...
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- 26 May at 20:14
How to use async lambda with SelectMany?
How to use async lambda with SelectMany? I'm getting the following error when trying to use an `async` lambda within `IEnumerable.SelectMany`: > The type arguments for method 'IEnumerable System.Linq...
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- 3 Nov at 09:48
OrderBy and Top in LINQ with good performance
OrderBy and Top in LINQ with good performance What is a good way to get the top 10 records from a very large collection and use a custom `OrderBy`? If I use the LINQ to Objects `OrderBy` method it is ...
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- 5 Jul at 09:19
Splitting an array using LINQ
Splitting an array using LINQ I have a collection uni-dimensional like this: I would like to convert that collection in a bi-dimensional collection like this: Basically I want to group or split if you...
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- 28 Dec at 17:41
Does LINQ to Objects keep its order
Does LINQ to Objects keep its order I have a `List` and instead want to convert them for simple processing to a `List`, doing the following: Is the `.Select()` statement on a LINQ to Objects object to...
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- 23 May at 12:10