[REBOL] Re: Replacing placeholders?
From: tim-johnsons:web at: 8-Aug-2007 15:09
On Wednesday 08 August 2007, Kai Peters wrote:
> Thanks for that one - no way that this newbie here would have figured this
> out anytime soon...
>
> If that's what you refer to as "getting behind the curve.." you must be
> fishing for compliments :)
No. I code in several languages. When I get away from rebol for a while,
my "reb-Q" drops.
> Well, at least I learned one little (unrelated) detail from your exercise:
>
> Having a word previously defined with the same name as the implicit loop
> variable
> overshadows the loop variable (forgive me if this terminology is not Rebol
> proper)
There is a term called "shadowing" - used in scheme and lisp, but:
see this:
>> names
== ["Tim" "Carlos" "Kai"]
>> key: "George"
== "George"
>> foreach key names[print key]
Tim
Carlos
Kai
>> key
== "George"
;; 'key has scope local to the 'foreach loop,
;; no shadowing here.
Tim
