OpenEuphoria

Re: How Come This Binary Op Doesn't Work?

• Posted by Juergen Luethje <j.lue at gmx.d?> Jul 14, 2007
• 550 views

c.k.lester wrote:

> }}}
<eucode>sequence temp
> integer bool
> 
> temp = {}
> 
> bool = atom(temp) and temp = 1</eucode>
{{{

> 
> bool keeps getting set to an empty sequence, not 0.
> 
> What's up with that?!?!

A comparison such as
   temp = 1
only works as you'd expect when you are sure that 'temp' is an atom.
If 'temp' is or might be a sequence, and you also don't want those
special sequence operations to take place, then use 'equal()' instead
of '='.

   bool = atom(temp) and equal(temp,1)
works fine.

BTW: This is old news, but it's so easy to forget it. 

Regards,
   Juergen