Proxy class / little factory

ruby-talk
1

Any reason why TextSingle and TextMultiple can’t be subclassed from Text?

···

On Monday 26 August 2002 10:01 pm, Tom Sawyer wrote:

maybe someone can help me. i am trying to make a class such that when it
is used it acts like one or another class based on an attribute. i wrote
this little factory version:

class Text

def new(component)
if component <= 1
return TextSingle.new
else
return TextMultiple.new
end
end

class TextSingle
def initilaize
…
end
end

class TextMultiple
def initilaize
…
end
end

end

this could work (i actually haven’t run it) but the problem is that the
type of the object returned is not Text, but TextSingle or TextMultiple.
i need it to be Text. eg.

atext = Text.new(1)
p atext.class # → TextSingle

for it it needs to be:

p atext.class # → Text

suggestions?

~transami

2

Any reason why TextSingle and TextMultiple can’t be subclassed from Text?

doh! that’s seems the simple answer i missed. then #kind_of(Text) would
still work.

thanks!

and thanks to everyone who responded.

···

–
~transami