[REBOL] Re: FAQ: How to return a block with evaluated value ?
From: lmecir:mbox:vol:cz at: 13-Dec-2001 11:55
Hi Patrick,
in the specified case the solution using REDUCE is a little bit shorter:
b3: func [n][return reduce [n n]]
Cheers
Ladislav
----- Original Message -----
From: "Patrick Philipot" <[pat665--ifrance--com]>
To: <[rebol-list--rebol--com]>
Sent: Monday, December 10, 2001 10:04 PM
Subject: [REBOL] FAQ: How to return a block with evaluated value ?
Hi, all
Is it OK if I post some short Q&A about Rebol to the list for validation ?
Here is an example. I have one more to come. I will continue depending on
the feed back I will get.
How to return a block with evaluated value ?
Short answer:
Using compose.
Problem illustration :
>> b: func [n][return [n n]]
>> b 3
== [n n]
The result of b 3 is [n n] where one obviously expects [3 3].
Problem resolution :
>> new-b: func [n][return compose [(n) (n)]]
>> new-b 3
== [3 3]
Compose forces the evaluation of the parens (n).
