Re: Reverse sorting an array

From	Eric Sosman <esosman@ieee-dot-org.invalid>
Newsgroups	comp.lang.java.help
Subject	Re: Reverse sorting an array
Date	2011-10-01 22:58 -0400
Organization	A noiseless patient Spider
Message-ID	<j68k2d$8o0$1@dont-email.me> (permalink)
References	<8ea2add1-ce9c-423b-bdb8-92c461cf9c6d@5g2000yqo.googlegroups.com> <j64aek$23e$1@dont-email.me> <5ff0ec30-9ffe-4513-ac55-c5d16f141399@u6g2000vbo.googlegroups.com> <j65o5r$huv$1@dont-email.me> <1jjf871i3ug6e4fui8aaanln5h21r17m0h@4ax.com>

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On 10/1/2011 10:38 PM, Roedy Green wrote:
> On Fri, 30 Sep 2011 20:50:33 -0400, Eric Sosman
> <esosman@ieee-dot-org.invalid>  wrote, quoted or indirectly quoted
> someone who said :
>
>>      * Negate every element of the array, use Arrays.sort() to put the
>>        array in ascending order, and then negate all the elements again.
>>        (Note that this won't work if Integer.MIN_VALUE appears in the
>>        array, because Integer.MIN_VALUE == -Integer.MIN_VALUE.)
> oops
>
> because Integer.MIN_VALUE != -Integer.MIN_VALUE

     "I meant what I said, and I said what I meant."  But if you
don't believe me, try it yourself:

	public class Asymmetry {
	    public static void main(String[] unused) {
	        System.out.println(Integer.MIN_VALUE ==
	                           -Integer.MIN_VALUE);
	    }
	}

Welcome to the world of fixed-precision two's complement arithmetic.

-- 
Eric Sosman
esosman@ieee-dot-org.invalid

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Thread

Reverse sorting an array Fred <albert.xtheunknown0@gmail.com> - 2011-09-30 04:03 -0700
  Re: Reverse sorting an array Eric Sosman <esosman@ieee-dot-org.invalid> - 2011-09-30 07:50 -0400
    Re: Reverse sorting an array Fred <albert.xtheunknown0@gmail.com> - 2011-09-30 15:24 -0700
      Re: Reverse sorting an array Eric Sosman <esosman@ieee-dot-org.invalid> - 2011-09-30 20:50 -0400
        Re: Reverse sorting an array Roedy Green <see_website@mindprod.com.invalid> - 2011-10-01 19:38 -0700
          Re: Reverse sorting an array Eric Sosman <esosman@ieee-dot-org.invalid> - 2011-10-01 22:58 -0400
            Re: Reverse sorting an array Lew <lewbloch@gmail.com> - 2011-10-01 20:21 -0700
    Re: Reverse sorting an array Fred <albert.xtheunknown0@gmail.com> - 2011-09-30 15:31 -0700
      Re: Reverse sorting an array Roedy Green <see_website@mindprod.com.invalid> - 2011-09-30 15:45 -0700
        Re: Reverse sorting an array Fred <albert.xtheunknown0@gmail.com> - 2011-09-30 16:27 -0700
          Re: Reverse sorting an array Patricia Shanahan <pats@acm.org> - 2011-09-30 16:58 -0700
    Re: Reverse sorting an array Roedy Green <see_website@mindprod.com.invalid> - 2011-09-30 15:43 -0700
      Re: Reverse sorting an array Eric Sosman <esosman@ieee-dot-org.invalid> - 2011-09-30 20:57 -0400
  Re: Reverse sorting an array Roedy Green <see_website@mindprod.com.invalid> - 2011-09-30 04:58 -0700
    What qualifies as a constant ? (Was: Reverse sorting an array) Mayeul <mayeul.marguet@free.fr> - 2011-09-30 14:45 +0200
      Re: What qualifies as a constant ? (Was: Reverse sorting an array) Lew <lewbloch@gmail.com> - 2011-09-30 07:39 -0700
        Re: What qualifies as a constant ? (Was: Reverse sorting an array) Mayeul <mayeul.marguet@free.fr> - 2011-09-30 17:15 +0200
          Re: What qualifies as a constant ? (Was: Reverse sorting an array) Lew <lewbloch@gmail.com> - 2011-09-30 08:42 -0700

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