OpenEuphoria

Re: Named Elements (Was Re: Eu improvements (part 3))

• Posted by c.k.lester <euphoric at cklester.com> Jan 04, 2007
• 540 views

Karl Bochert wrote:
> c.k.lester wrote:
> > 
> > sequence my_seq is
> >    atom one=1, two=2, three=3
> > end sequence
> > 
> > my_seq seq1
> > 
> > -- can used named parameters or dot notation
> > ? seq1['one'] -- 1
> > ? seq1.one -- 1
> > ? seq1['test'] -- NULL? error?
> 
> I'm confused here.
>    seq1.one is a euphoria object with a value, just as foo is after
>    atom foo
>    Therefore seq1.test is an error because it has not been defined.

Right. I was throwing out a test case that should cause an error... But
in these cases, you might need to ask

isDefined( seq1, 'test' ) or somesuch... especially working with dynamic
or user-generated data/metadata.

>  Is seq1['one'] the same thing written with a different syntax?

Yes.