From: Gunnar Andersson <dff180@...>
Date: 2001-10-30T08:20:40+09:00
Subject: [ruby-talk:23776] RE:  why is true and false = true ?

> tf = true and false

Try only that line in the ruby interp and you get an 
error message that should show you what is wrong:

-:1: warning: found = in conditional, should be ==

So the assignment becomes part of the conditional
expression because of precedence rules.
"and" has lower precedence than "&&" if I remember correctly
so that's why:

tf = true && false 

is interpreted (correctly) as 

tf = (true && false)

but

tf = true and false

is apparently interpreted (incorrectly, according
to what you expected) as:

(tf = true) and false

i.e. you have assigned true to tf

/Gunnar


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