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From "Eric Pugh" <>
Subject RE: [Collections] ComparableComparator - nulls OK
Date Fri, 07 Jun 2002 19:40:00 GMT
+1,  In my sorts, having to deal with nulls is causing me difficulties as
well..  Although I could see something like any nulls being ignored as a
type of behavior..  Sort everything, and drop the nulls!


-----Original Message-----
From: Jonathan Carlson []
Sent: Friday, June 07, 2002 3:38 PM
Subject: [Collections] ComparableComparator - nulls OK

I'd like to make the case for a ComparableComparator that
allows the sorting of nulls to the bottom.  This could be a
flag to set on the existing class or another Comparator
called something like NullableComparableComparator (or

This becomes a big issue when sorting a collection of
things based on one of their getter methods with generic
components like the TransformingComparator I just
submitted.  Too often the returned value can be a null.

It's not too hard to write my own (I already have), but I
prefer having things like this standardized in one library
rather than written differently for each project.

My two cents.  I'd appreciate feedback, even negative
feedback if it's appropriate.


Jonathan Carlson
Minneapolis, Minnesota

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