ourse, there is none, hence the error."
- Hassan
On Sunday, January 13, 2019 at 7:52:53 AM UTC+2, Jon Zeppieri wrote:
>
>
>
> On Sun, Jan 13, 2019 at 12:37 AM Hassan Shahin > wrote:
>
>> Thanks Jack and Mike!
>>
>> You are right. Arguments to procedures will
, which is not the case.
Thanks again
On Sunday, January 13, 2019 at 7:29:10 AM UTC+2, Jack Rosenthal wrote:
>
> On Sat, 12 Jan 2019 at 21:12 -0800, Hassan Shahin wrote:
> > When I apply the procedure to 'John it will evaluate to 'symbol. The
> idea
> > of the proc
ote:
>
> You need to apply the function to 'John, with a single quote in front of
> it. The word John without that quote is just a variable reference to
> something that you have not actually defined.
>
> On Sat, Jan 12, 2019 at 11:34 PM Hassan Shahin > wrote:
>
&g
I have this definition for a procedure:
(define type-of (lambda (item)
(cond
[(pair? item) 'pair]
[(null? item) 'empty-list]
[(number? item) 'number]
[(symbol? item)
defined as the accessor function for the `children`
> field.
>
> I recommend using `type-case`, though.
>
> At Wed, 24 Oct 2018 19:05:44 -0700 (PDT), Hassan Shahin wrote:
> > using #lang Plait, I have defined these two types:
> >
> > (defin
using #lang Plait, I have defined these two types:
(define-type Property
(property [name : Symbol]
[value : (Boxof Symbol)]))
(define-type Tag
(tag
[name : String]
[id : String]
[properties : (Listof Property)]
[value : Content-Type]
[children : (Boxof (Listof Tag))
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