From: Justin Collins <justincollins@...>
Date: 2008-06-17T11:48:55+09:00
Subject: Re: print(true and true) #=> the parenthesis issue

hakunin wrote:
> The parenthesis have been discussed before, but maybe this is another
> angle. In a nutshell:
>
> print(true and true) # => throws the following:
>
> SyntaxError: compile error
> (irb):14: syntax error, unexpected kAND, expecting ')'
> print(true and true)
>               ^
> 	from (irb):14
>
> print (true and true) # => works. (notice the space)
>
> It looks obvious that the only parenthesis around the method args are
> containing the expression to be evaluated, so why would this cause
> ambiguity?  Especially strange that the incorrect way - with the space
> - works as expected.  Is there any fix in the works? Anything done
> about this?
>
> Thanks!
>
>   

print (true and true) is not incorrect, it is just using parentheses for 
a different purpose.

What you are seeing is just a precedence issue, because "and" and "or" 
have very low precedence.

Compare:

print(true && true)
print(true or true)
print(true || true)
print((true and true))
print((true or true))

Maybe you already knew that, though?

-Justin