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Posted to solr-dev@lucene.apache.org by Ryan McKinley <ry...@gmail.com> on 2008/06/06 21:10:53 UTC

Re: svn commit: r664083 - /lucene/solr/trunk/src/test/org/apache/solr/util/TestUtils.java

>
> +    num = 234;
> +   //?????  why 1?
> +   // assertEquals( 0, BitUtil.ntz(num) );
> +   // assertEquals( 0, BitUtil.ntz2(num) );
> +   // assertEquals( 0, BitUtil.ntz3(num) );
> +  }

Any idea why the answer is 1?  the docs say "(only works for x!=0)"

Re: svn commit: r664083 - /lucene/solr/trunk/src/test/org/apache/solr/util/TestUtils.java

Posted by Yonik Seeley <yo...@apache.org>.

On Fri, Jun 6, 2008 at 3:10 PM, Ryan McKinley <ry...@gmail.com> wrote:
>>
>> +    num = 234;
>> +   //?????  why 1?
>> +   // assertEquals( 0, BitUtil.ntz(num) );
>> +   // assertEquals( 0, BitUtil.ntz2(num) );
>> +   // assertEquals( 0, BitUtil.ntz3(num) );
>> +  }
>
> Any idea why the answer is 1?  the docs say "(only works for x!=0)"

ntz is for binary bits (the other test cases just happen to be the
same in binary and decimal - pretty funny).
Anyway 234 in binary is 11101010  (1 trailing zero)

-Yonik