Re: passing a Factory to a method to create a generic instance

From:
Tom Anderson <twic@urchin.earth.li>
Newsgroups:
comp.lang.java.programmer
Date:
Thu, 22 May 2008 19:18:56 +0100
Message-ID:
<Pine.LNX.4.64.0805221916120.10241@urchin.earth.li>
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On Wed, 21 May 2008, Arne Vajh?j wrote:

Tom Anderson wrote:

On Tue, 20 May 2008, Arne Vajh?j wrote:

Tom Anderson wrote:

The combination of default parameters and keyword arguments is a simple,
clean and convenient way of managing complicated argument lists. Examples
from python - subprocess.Popen:


PS: It would of course have to be something else than = to not break
   existing code that passes a boolean expression.


Arne, please don't tell me you're confusing = and ==!


I am babbling nonsense. == would be a boolean expression. = is an
assignment. It is of course the assignment that is a problem.

       int i = 0;
       m(i = 2);

is legal Java and if m was declared as m(int i) the above syntax would
require one to memorize the (future) JLS to know what the code does.


Balls. I'd forgotten that assignments were expressions in java. IMHO, they
shouldn't be!

You're right, it would have to be : or something. It could even just be a
space, actually, but that would look weird. Colons:

input = new CsvReader(myfile, dialect: "excel", skipinitialspace: true) ;

Spaces:

input = new CsvReader(myfile, dialect "excel", skipinitialspace true) ;

tom

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