[ https://issues.apache.org/jira/browse/MATH-894?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13497177#comment-13497177 ] 

Gilles commented on MATH-894:
-----------------------------

I also find it slightly odd that the "expansionFactor" and "contractionCriteria" are "float"s and not "double"s.
                
> Cleanup of "ResizableDoubleArray" ("o.a.c.m.util")
> --------------------------------------------------
>
>                 Key: MATH-894
>                 URL: https://issues.apache.org/jira/browse/MATH-894
>             Project: Commons Math
>          Issue Type: Improvement
>    Affects Versions: 3.0
>            Reporter: Gilles
>            Assignee: Gilles
>            Priority: Minor
>             Fix For: 3.1, 4.0
>
>         Attachments: MATH-894.patch
>
>
> Method "addElement" should not call "contract()", as it will almost always make the storage array shrink on the first call since it will be considered "too big" (for just storing one element).
> See discussion about this change in MATH-757.
> Miscellaneous code modifications are also proposed in order to improve encapsulation.

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