Comparing every element in a list against every other element

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What is the most efficient way to take every element in a list and do some operation on it. For example say you have a list of objects that all have x,y data points. You have a function that can calculate the dot product but I want to calculate the dot product against every other element

Posted 30-May-13 18:07pm

shekarchee

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Sergey Alexandrovich Kryukov · Answer 1 · 2013-05-30T18:26:00

Solution 1

Nested loop. But what, did you expect some miracle? There is no such thing as miracle.

—SA

Posted 30-May-13 18:26pm

Sergey Alexandrovich Kryukov

Makwana Kishor · Answer 2 · 2013-05-31T00:28:00

string[] textlist = new string[] {"a", "b", "c"};
var intersecting = from string a in textlist
from string b in textlist
where ((a != b) && (a.CompareTo(b) == -1)) // && a.SomeCondition(b)
select new { object1 = a, object2 = b }
;

intersecting.Dump("Result");

Kishor Makwana
Software Engineer
Insight Softech
www.insightsoftech.com