Cybercrux

Everything is achievable through technology

Intersect by

 

New Linq Extention

 


public static IEnumerable IntersectBy<TSource, TKey>(
this IEnumerable first,
IEnumerable second,
Func<TSource, TKey> keySelector,
IEqualityComparer keyComparer)
{
HashSet keys = new HashSet(first.Select(keySelector),
keyComparer);
foreach (var element in second)
{
TKey key = keySelector(element);
// Remove the key so we only yield once
if (keys.Remove(key))
{
yield return element;
}
}
}

 

Reference

Advertisements

Leave a Reply

Fill in your details below or click an icon to log in:

WordPress.com Logo

You are commenting using your WordPress.com account. Log Out / Change )

Twitter picture

You are commenting using your Twitter account. Log Out / Change )

Facebook photo

You are commenting using your Facebook account. Log Out / Change )

Google+ photo

You are commenting using your Google+ account. Log Out / Change )

Connecting to %s