From: Joel VanderWerf <vjoel@...>
Date: 2004-08-19T04:37:12+09:00
Subject: Re: When to use parentheses around method args?

Richard Dale wrote:
> Are there any rules of thumb for when it's a good idea to leave out the
> brackets and when to use them?

One rule that has been put forth is:

"Use parens in a method call if you are making use of the return value."

So, even though every expression in ruby does return a value, in those 
cases where you are not interested in it, omit parens if you feel like it.

One case where I almost always omit parens is:

iterator_with_args arg1, arg2 do
   ...
end

(You have to use parens if you use the {...} form instead of do...end.)