| Re: Booleans compared to strings [message #181382 is a reply to message #181372] |
Tue, 14 May 2013 19:36   |
M. Strobel
Messages: 386
Registered: December 2011
Karma:
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Senior Member |
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Am 14.05.2013 00:28, schrieb The Natural Philosopher:
> On 13/05/13 22:46, Thomas 'PointedEars' Lahn wrote:
>> M. Strobel wrote:
>>
>>> Am 13.05.2013 22:24, schrieb Doug Cassidy:
>>>> On Monday, May 13, 2013 6:13:11 AM UTC-7, Jerry Stuckle wrote:
>>>> > On 5/13/2013 8:29 AM, Doug Cassidy wrote:
>>>> >> I dont see why boolean true is equal to string false in any way.
>>>> > A string comparison returns false only if the string is NULL, is an
>>>> > empty string ('') or contains a zero ('0'). All other values (including
>>>> > 'false') are true.
>>>> got it, thanks
>>> My favourite link to comparison in PHP is
>>> http://www.php.net/manual/en/types.comparisons.php
>>> where you have also the "if ($x)" results.
>>>
>>> Highly recommended.
>> Slighty off, though, because “if” is _not_ a function.
> Semantics. It behaves like one, takes two variables and returns a value.
>
> In FORTH its like any other function IIRC, But then everything is a function , in
> forth :-)
Hmm, in Forth you do 0= or something, then "if" takes a flag off the stack and does a
branch/jump to the else address if the flag is false.
Not easy to see it as a function.
/Str.
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