From: Justin Collins <justincollins@...>
Date: 2008-03-11T08:40:00+09:00
Subject: Re: and statement

Subbu wrote:
> On Mar 4, 1:18 pm, yermej <yer...@gmail.com> wrote:
>   
>> On Mar 4, 8:23 am, Lionel Bouton <lionel-subscript...@bouton.name>
>> wrote:
>>
>>
>>
>>     
>>> 7stud -- wrote:
>>>       
>>>> Subbu wrote:
>>>>         
>>>>> Thank you so much. I looked up 'and' && operands in the PickAxe book
>>>>> and this is what it says:
>>>>> "The 'and' and && operators evaluate their first operand. If false,
>>>>> the expression returns the value of the first operand; otherwise, the
>>>>> expression returns the value of the second operand"
>>>>>           
>>>> Which doesn't appear to be true.   Look at this:
>>>>         
>>>> result = (x=20)
>>>> puts result          #20
>>>>         
>>>> result = true and x=20
>>>> puts result        #true
>>>>         
>>> Precedence...
>>>       
>>> result = (true and x = 20)
>>>       
>> Or:
>>
>> result = true && x = 20
>>
>> The precedence is the only difference between 'and' and '&&'.
>>     
>
> Does that mean = has higher precedence than 'and'?
>
>   

Yes.

http://phrogz.net/ProgrammingRuby/language.html#table_18.4