Modules as namespace

Ruby
1

i am writing plugins for sketchup and use a module to encapsulate and
protect my variable and methods from name clashes.

Is there any difference between the following?

module A
def A.say_hi # or self.say
puts “hi”
end
end

module B; end
def B.say_hi
puts “hi”
end

thanks.

2

Thank you, David. I wasn’t even thinking about constants, but that’s
good to know.

3

Hi –

On Tue, 8 Sep 2009, Jim wrote:

module B; end
def B.say_hi
puts “hi”
end

The only difference I’m aware of has to do with constant resolution:

H = “Hi from top level”

module A
H = “Hi from A”
def A.say_hi
puts H
end
end

module B
H = “Hi from B”
end

def B.say_hi
puts H
end

A.say_hi # Hi from A
B.say_hi # Hi from top level

David

–
David A. Black / Ruby Power and Light, LLC / http://www.rubypal.com
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