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https://issues.apache.org/jira/browse/LANG-804?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13756983#comment-13756983
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Sebb commented on LANG-804:
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I think that's a slightly different consideration.
These are coefficients used to generate hashcodes.
The point about the two numbers is that they need to be chosen so the algorithm
does not generate too many clashes.
One such algorithm is the one that is used; AFAIK it was not designed to use
negative coefficients.
> Redundant check for zero in HashCodeBuilder ctor
> ------------------------------------------------
>
> Key: LANG-804
> URL: https://issues.apache.org/jira/browse/LANG-804
> Project: Commons Lang
> Issue Type: Improvement
> Components: lang.builder.*
> Reporter: Sebb
> Priority: Minor
>
> The HashCodeBuilder(int, int) ctor checks both parameters for zero, as well
> as checking for an odd number.
> Zero is never odd, so the zero check could be eliminated.
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