#19 getFittestChromosomes semantics?

[Fanguad]

What are the semantics if getFittestChromosomes(int) is
called where a_numberOfChromosomes is more than the
total population? Admittedly, this is only really of
concern in test problems where the population size is
unrealistically small, but I think it would be to
define the semantics in the javadoc.

Right now, no bounds checking is performed on the
argument, so an ArrayIndexOutOfBounds exception is thrown.

[Klaus]

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You are right. I added javadoc comments and fixed the code
as well extending a test case

[Fanguad]

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Looks good to me. You might want to comment on the line

assertEquals(4, p.determineFittestChromosomes(5).size());

in

testDetermineFittestChromosomes_1(), since it's not
intuitive why 4 is the correct answer, and not 5 (since the
four chromosomes are added in a different method).

[Klaus]

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OK, good suggestion. I checked in the changed class.