Re: Getl and maps behavior?

[Henrik Sarvell]

Maybe this is a non-issue when I think about it. I can think of two
possibilities:

1) For some reason an +Entity object needs to be converted to JSON.

2) A key => value structure needs to be sent, in such a case a paired list
would do the trick, ie: ((k1 . v1) (k2 "v2")) => {"k1": v1, "k2": "v2"}.
This is probably more preferable than an object when I think even more :-).

So, I'll implement that and take a look at converting entity objects.

/Henrik

On Thu, Aug 21, 2008 at 3:02 PM, Alexander Burger <[EMAIL PROTECTED]>wrote:

> Hi Henrik,
>
> > The main problem is that I need to be able to handle an arbitrary object
> and
> > convert all Ts to true, and NILs to false in the JSON string.
>
> With the NILs we run into a problem, because a property value of NIL
> means that this property does not exist. So it can never be extracted
> from the object itself.
>
> To cover non-NIL properties, you could do
>
>   (mapcar
>      '((X) (or (pair X) (cons T X)))
>      (getl Tst) )
>
>
> > Is there some other function/mechanism I could use instead?
>
> Hmm, not that I can think of at the moment.
>
> To solve the problem with the NILs, you'll have to keep a separate
> record of possible properties (as is done, for example, in the '+Entity'
> objects).
>
> Cheers,
> - Alex
> --
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<div dir="ltr">Maybe this is a non-issue when I think about it. I can think of 
two possibilities:<br><br>1) For some reason an +Entity object needs to be 
converted to JSON.<br><br>2) A key =&gt; value structure needs to be sent, in 
such a case a paired list would do the trick, ie: ((k1 . v1) (k2 
&quot;v2&quot;)) =&gt; {&quot;k1&quot;: v1, &quot;k2&quot;: &quot;v2&quot;}. 
This is probably more preferable than an object when I think even more :-).<br>
<br>So, I&#39;ll implement that and take a look at converting entity 
objects.<br><br>/Henrik<br><br><div class="gmail_quote">On Thu, Aug 21, 2008 at 
3:02 PM, Alexander Burger <span dir="ltr">&lt;<a href="mailto:[EMAIL 
PROTECTED]">[EMAIL PROTECTED]</a>&gt;</span> wrote:<br>
<blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 
204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;">Hi Henrik,<br>
<div class="Ih2E3d"><br>
&gt; The main problem is that I need to be able to handle an arbitrary object 
and<br>
&gt; convert all Ts to true, and NILs to false in the JSON string.<br>
<br>
</div>With the NILs we run into a problem, because a property value of NIL<br>
means that this property does not exist. So it can never be extracted<br>
from the object itself.<br>
<br>
To cover non-NIL properties, you could do<br>
<br>
 &nbsp; (mapcar<br>
 &nbsp; &nbsp; &nbsp;&#39;((X) (or (pair X) (cons T X)))<br>
 &nbsp; &nbsp; &nbsp;(getl Tst) )<br>
<div class="Ih2E3d"><br>
<br>
&gt; Is there some other function/mechanism I could use instead?<br>
<br>
</div>Hmm, not that I can think of at the moment.<br>
<br>
To solve the problem with the NILs, you&#39;ll have to keep a separate<br>
record of possible properties (as is done, for example, in the 
&#39;+Entity&#39;<br>
objects).<br>
<br>
Cheers,<br>
- Alex<br>
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