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Posted by steve on 10/13/19 11:30
ok...two thumbs down so far for singletons...only one citing specifics.
singletons are *great* in my opinion. you just know how, when, and where to
use them.
the example of using a global variable/function/class to achieve a
work-in-place-of a singleton is a false notion. while you may achieve the
same or desired effect(s), you cannot enforce the same scope as a singleton
without a lot of programming (and praying that another developer on your
team doesn't much things up...and understands what you're doing...to which
end he'd simply say "shit, why didn't this idiot just create a singleton and
be done with it!").
and the notion of being pigeon-holed into not scaling is, likewise, a farse.
singletons do what they are designed to do. if you had other intentions from
the beginning, then design you system differently...else if the requirements
change, exactly how much work does it take to convert a singleton into a
multi-instancing class?
you may want to wait for your book to arrive before assuming either of the
above reasons make singletons "bad".
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