From: 7stud -- <bbxx789_05ss@...>
Date: 2007-10-31T10:41:35+09:00
Subject: Re: Newbie Question on Operator Precedence?

Z T wrote:
> What's the reason? 


The line:

> puts false or true

is equivalent to:

(puts false) or true

puts returns nil, so that statement is equivalent to:

nil or true

which evaluates to:

false or true

and the result of that is true--but since you didn't save the result in 
a variable, it is discarded.  Try this:

result = (puts false) or true
p result

--output:--
nil

That result may also be surprising.  That's because the statement:

result = (puts false) or true

is equivalent to

(result = (puts false)) or true

puts returns nil, which gets assigned to result, and the statement 
becomes:

result or true

which is equivalent to:

nil or true

which is equivalent to:

false or true

which evaluates to true--but since the result isn't stored anywhere, it 
is discarded.


> if false or true

That statement is equivalent to:

if (false or true)

which evaluates to:

if true

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