From: Steve Klabnik <steve@...>
Date: 2010-07-18T11:21:23+09:00
Subject: Re: ruby abstraction

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There aren't interfaces in Ruby, because Ruby is dynamically typed. So
rather than see if an object is of the right type, you ask it if it responds
to a certain message, using Object#respond_to?

I'm open to the idea that interfaces might not be needed in Ruby but I'd
> very much like this properly explained since as a thought-experiment I
> propose Java without interfaces would be worse - therefore what is it
> specifically about Ruby which means it is not as needed?


It comes down to the whole dynamic/static thing. Ruby's philosophy is 'screw
the types, does it do what you want or not?'

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