From: 7stud -- <bbxx789_05ss@...>
Date: 2009-11-15T22:44:05+09:00
Subject: Re: very newbie question

duxieweb wrote:
> 2009/11/15 Stefano Crocco <stefano.crocco@alice.it>:
> 
>>
>> Because 0 is a true value in ruby, so !queue is false and the body of the if
>> expression is not executed. In ruby, the only false values are false and nil.
>>
> 
> Oh, that sounds so different from other languages that 0 is a true 
> value.
> 
> python:
>>>> x=0
>>>> if (not x):
> ...   print "x is false"
> ...
> x is false
> 
> perl:
> # perl -le '$x=0; print "x is false" if not $x'
> x is false
> 
> 
> Thank you.

You might want to take a look at these examples:

python:
x = 0

if x:
    print "x is true"
else:
    print "x is false"

--output:--
x is false


perl:
$ perl -lwe 'my $x=0; if ($x) {print "x is true";} else {print "x is 
false"}'
x is false
$


-- 
Posted via http://www.ruby-forum.com/.