Re: String.Compare seems to fail when it should not

I especially like the comments at the bottom ... That's funny and sad at the
same time :p

Don't you DARE close this without fixing like you did with
TypeConverter.IsValid.
 Posted by IDisposable1 on 11/16/2006 at 2:44 PM

They dared
 Posted by Marc Gravell on 11/27/2006 at 10:10 PM

On Mon, Sep 8, 2008 at 10:03 PM, Mark Hurd <[email protected]> wrote:

> On Tue, Sep 9, 2008 at 5:57 AM, Sébastien Lorion
> <[email protected]> wrote:
> > My bottom line is, if I control the data and I am 100% sure it won't
> contain
> > problematic chars, then by all means, I will use ordinal compare and get
> the
> > speed increase. Otherwise, as a non English native myself, I want to make
> my
> > apps international and so, I will use the culture aware comparison (and
> > other operations).
>
> Just be careful what you use the comparison for... Note this highly
> rated Connect "Won't Fix":
>
>
> https://connect.microsoft.com/VisualStudio/feedback/ViewFeedback.aspx?FeedbackID=236900
>
> I bet this'd be a bugger of a bug to locate.
>
> In this snippet you'd expect the two SortedLists to be identical, but
> they're not, and the reason's clear -- the strings are s1<s2<s3<s1!
>
> Dim s1 As String = "-0.67:-0.33:0.33"
> Dim s2 As String = "0.67:-0.33:0.33"
> Dim s3 As String = "-0.67:0.33:-0.33"
> Console.WriteLine(s1.CompareTo(s2))
> Console.WriteLine(s2.CompareTo(s3))
> Console.WriteLine(s3.CompareTo(s1))
> Dim l, m As New SortedList(Of String, Integer)
> l.Add(S1,1)
> l.Add(S2,2)
> l.Add(S3,3)
> m.Add(S3,3)
> m.Add(S2,2)
> m.Add(S1,1)
> For Each i in m
>  Console.WriteLine(i)
> Next
> For Each j in l
>  Console.WriteLine(j)
> Next
>
> Now I know why FXCop and the built-in VS2008 Code Analysis always says
> to specify the comparer and cultureinfo -- it's not just for performance!
>
> Regards,
> Mark Hurd, B.Sc.(Ma.) (Hons.)
>
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