No Boolean type in "types"

[Mikael Olofsson]

On 13-Jun-00 Thomas Mangin wrote:
 >  Can someone explain me why the module "types" have no boolean type defined
 >  ?

Probably because there is no boolean type. Anything empty or zero is
considered false, and anything else is considered true. 

Exampes:
   0, '', [], {}              are all false
   1, ' ', [0], {'false':0}   are all true

You can tamper with your own classes to make instances be considered 
true or false, to your liking. See the manual.

IIRC,

   true = (0==0)
   false = not true

would actually give you the integers 1 and 0 in the current 
implementation.

/Mikael

-----------------------------------------------------------------------
E-Mail:  Mikael Olofsson <mikael at isy.liu.se>
WWW:     http://www.dtr.isy.liu.se/dtr/staff/mikael
Phone:   +46 - (0)13 - 28 1343
Telefax: +46 - (0)13 - 28 1339
Date:    13-Jun-00
Time:    13:23:35

This message was sent by XF-Mail.
-----------------------------------------------------------------------