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Groups > comp.lang.java.programmer > #19691

Re: Enumset.contains

From Roedy Green <see_website@mindprod.com.invalid>
Newsgroups comp.lang.java.programmer
Subject Re: Enumset.contains
Date 2012-11-10 16:56 -0800
Organization Canadian Mind Products
Message-ID <rjtt98dc30lfkhvu0ar2ltd4tok3i51nap@4ax.com> (permalink)
References <6btq9811qn454a7s9u4dka81qn6k6e2n56@4ax.com> <ag5i0kF13jmU1@mid.individual.net>

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On Sat, 10 Nov 2012 00:30:28 +0100, Robert Klemme
<shortcutter@googlemail.com> wrote, quoted or indirectly quoted
someone who said :

>> intersection
>retainAll()

These are methods of AbstractSet inherited and in my opinion
preposterously pedestrian. You might as well have used a TreeSet as an
Enum.  A proper intersection method for EnumSets would be implemented
with a single AND machine instruction.

Mathematicians have been using the term "intersection" for at least
100 years. I think it was improper of Sun/Oracle to rename the
functions.

-- 
Roedy Green Canadian Mind Products http://mindprod.com
Ironically, even though the Internet was created by the US military 
[DARPA (Defense Advanced Research Projects Agency)]
to withstand a nuclear attack, it is almost defenceless against malice
from any of its users

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Thread

Enumset.contains Roedy Green <see_website@mindprod.com.invalid> - 2012-11-09 13:40 -0800
  Re: Enumset.contains Lew <lewbloch@gmail.com> - 2012-11-09 15:07 -0800
    Re: Enumset.contains Andreas Leitgeb <avl@gamma.logic.tuwien.ac.at> - 2012-11-09 23:50 +0000
  Re: Enumset.contains Robert Klemme <shortcutter@googlemail.com> - 2012-11-10 00:30 +0100
    Re: Enumset.contains Roedy Green <see_website@mindprod.com.invalid> - 2012-11-10 16:56 -0800
      Re: Enumset.contains markspace <-@.> - 2012-11-10 17:10 -0800
      Re: Enumset.contains Joshua Cranmer <Pidgeot18@verizon.invalid> - 2012-11-10 20:38 -0600

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