CODEWITHSUNDEEP
.netsortingsortedset
paparazzo
paparazzo

Reputation: 45096

SortedSet first and Min() are not the same

First and Min() are not the same
Last and Max() are not the same

In the foreach the sort is
aaa
bbb
ccc
^^

Min()
^^

Max()
cc

How can I get Min() and first to be the same?
How can I get Max() and last to be the same?

ss.FirstOrDefault() is not equal ss.Min()
ss.Reverse().FirstOrDefault() is not equal ss.Max() 

public void SS()
{
    SortedSet<string> ss = new SortedSet<string>(StringComparer.OrdinalIgnoreCase);
    ss.Add("bbb");
    ss.Add("aaa");            
    ss.Add("^^");
    ss.Add("ccc");
    foreach (string s in ss)
        Debug.WriteLine(s);
    Debug.WriteLine(ss.Min());
    Debug.WriteLine(ss.Max());                   
}

Upvotes: 1

Views: 1364

Answers (2)

Nikola Hristov
Nikola Hristov

Reputation: 736

Use ss.Min and ss.Max Properties (not Methods).

Upvotes: 5

Alberto Chiesa
Alberto Chiesa

Reputation: 7350

The short answer is: you can't.

The longer answer is in the Min implementation, here.

If you're not comparing numbers, the code will use the Comparer<TSource>.Default, which is not guaranteed to be the one you are using in the SortedSet (and in your case isn't).

BTW, if you just want Min and First to be the same, do not specify a comparer when creating the set. It will use the dafault automatically.

Upvotes: 0

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