How to perform .Max() on a property of all objects in a collection and return the object with maximum value [duplicate]

by

We have an extension method to do exactly this in MoreLINQ. You can look at the implementation there, but basically it’s a case of iterating through the data, remembering the maximum element we’ve seen so far and the maximum value it produced under the projection.

In your case you’d do something like:

var item = items.MaxBy(x => x.Height);

This is better (IMO) than any of the solutions presented here other than Mehrdad’s second solution (which is basically the same as MaxBy):

  • It’s O(n) unlike the previous accepted answer which finds the maximum value on every iteration (making it O(n^2))
  • The ordering solution is O(n log n)
  • Taking the Max value and then finding the first element with that value is O(n), but iterates over the sequence twice. Where possible, you should use LINQ in a single-pass fashion.
  • It’s a lot simpler to read and understand than the aggregate version, and only evaluates the projection once per element

More Related Contents:

  1. Good way to get the key of the highest value of a Dictionary in C#
  2. Return max repeated item in list
  3. c# – Objects not saving their own information
  4. Difference Between Select and SelectMany
  5. When to use .First and when to use .FirstOrDefault with LINQ?
  6. How to do joins in LINQ on multiple fields in single join
  7. printing all contents of array in C#
  8. Quickest way to compare two generic lists for differences
  9. Convert string[] to int[] in one line of code using LINQ
  10. How do I use LINQ Contains(string[]) instead of Contains(string)
  11. Sequence contains no elements?
  12. Func with out parameter
  13. Determine if a sequence contains all elements of another sequence using Linq [duplicate]
  14. Writing Recursive CTE using Entity Framework Fluent syntax or Inline syntax
  15. Linq to EntityFramework DateTime
  16. LINQ to SQL multiple tables left outer join
  17. how to check if object already exists in a list
  18. How to Bulk Update records in Entity Framework?
  19. Linq order by, group by and order by each group?
  20. LINQ Inner-Join vs Left-Join
  21. Find character with most occurrences in string?
  22. Get table-data from table-name in LINQ DataContext
  23. convert this LINQ expression into Lambda
  24. How to sort a dictionary by key
  25. LINQ performance Count vs Where and Count
  26. Issues Doing a String Comparison in LINQ
  27. Select all columns after JOIN in LINQ
  28. Creating a LINQ select from multiple tables
  29. If Else in LINQ
  30. Parsing a string C# LINQ expression

Leave a Comment