See what I added to my answer. After that, we are just checking the values who have repeated more than once. Even if I only need the first Duplicate all elements of the collections are enumerated at least once. Christophe Christophe However, I added the line Console. GetEnumerator ; return enumerator. In LINQ, this translates to:.
The easiest way to solve the problem is to group the elements based on their value, and then pick a representative of the group if there are more than one. Note that this will return all duplicates, so if you only want to know. I know it's not the answer to the original question, but you may find yourself here with this problem. Note, a default parameter was used (requiring C# ). Eliminate duplicate elements from a List with Distinct, HashSet, or for-loops.
C LINQ find duplicates in List Stack Overflow
Benchmark the methods on Lists.
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What is the best way to find the duplicates in a list of a list of integers no matter what position thay are in? Sign up to join this community. With my implementaion, you know it will never iterate the whole collection.
Video: Find duplicate list c# remove duplicates from integer array in c#
Find duplicate list c#
Now I'm using a nested for loop to do this.
var duplicates = y(s => r()). Where(g => () > 1).
How to find the duplicate items in a list C / C Sharp
Select(g. For every list, count how many following lists are equal to find out the duplicates ( and if duplicates are found, skip them in the main iteration).
Add i ; will lead to a list that includes all occurrences of duplicates. It continues if a next duplicate is requested. The following extension function stops enumerating as soon as a duplicate has been found.
Is there any possibility these are not always boolean opposites?
c Find duplicate in a list of a list of integers Software Engineering Stack Exchange
Where should be avoided, so that might be the reason. Hot Network Questions. Mirko Arcese Mirko Arcese 1, 2 2 gold badges 9 9 silver badges 9 9 bronze badges.