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Re: "Hello world!" without a public class?

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On 06.01.2013 09:44, Lew wrote:

> There's pedagogical merit in teaching the good habits first and the
> exceptional cases later. So you could begin with only 'public' classes
> overall, let alone for the main one, mentioning briefly at first that
> there is a way to drop the 'public' that you'll explain later.

+1

> As for 'final', that's harder. Hardly anyone in the field uses it,
> myself included, because most classes basically aren't inherited so it's
> not really risky to leave it out, and also there's a benefit to making
> classes heritable for test purposes.

I use it rather frequently on the basis of whether I intend a class for 
inheritance or not.  It's easier to loosen a restriction later than the 
other way round.  Plus, it /might/ help the JVM optimize.  But that's 
really the smallest benefit and the most unimportant reason.

> I think as a teacher I would use 'final' nearly always for classes, and
> explain to the class (of students) that I'm being picky, but for good
> reason. Also I'd mention that heritable classes support a certain style of
> test code, and teach it once inheritance had been covered.

That's a bit contradictory, isn't it?  I mean you say that almost nobody 
uses it (including you, and also for good reasons) yet you would 
recommend making it a habit to a beginner. :-)

Kind regards

	robert

-- 
remember.guy do |as, often| as.you_can - without end
http://blog.rubybestpractices.com/

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Re: "Hello world!" without a public class? Lew <lewbloch@gmail.com> - 2013-01-06 00:44 -0800
  Re: "Hello world!" without a public class? Robert Klemme <shortcutter@googlemail.com> - 2013-01-06 11:47 +0100

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