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From "Gilles (Created) (JIRA)" <j...@apache.org>
Subject [jira] [Created] (MATH-685) Add method "addToEntry" to the "RealVector" interface
Date Wed, 05 Oct 2011 14:14:34 GMT
Add method "addToEntry" to the "RealVector" interface
-----------------------------------------------------

                 Key: MATH-685
                 URL: https://issues.apache.org/jira/browse/MATH-685
             Project: Commons Math
          Issue Type: Wish
            Reporter: Gilles
            Assignee: Gilles
            Priority: Trivial
             Fix For: 3.0


Method "addToEntry":
{code}
m.addToEntry(i, j, addend);
{code}
as a shortcut to:
{code}
m.setEntry(i, j, m.getEntry(i, j) + addend);
{code}

It has been argued (on the "dev" ML) that some functional style would be a powerful and elegant
way to implement a whole set of related functionality ("scale", "scaleAndAdd", etc.). However
some simple things (like when the "addend" depends on "i" and "j") cannot be achieved without
writing many more lines of code.

Method "addToEntry" exists in "RealMatrix". If and when some satisfactory solution is found
in order to remove it there, "RealVector" can always be aligned with it.

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