[REBOL] RFF: empty? for blocks Re:(3)

[mailinglists]

Hello Ted,

> Here's something else that I find confusing:
>
> >> list: [ 1 2 3 4 ]
> == [ 1 2 3 4 ]
> >> list2: next list
> == [ 2 3 4 ]
> >> clear list
> == []
> >> list2:
> == [ 2 3 4 ]
> >> next list2:
> ** Script Error: Out of Range or Past End
>
> About every other operation I try with list2 errors. Exceptions
> are that I can assign it to another variable and print it.

Suddenly I remembered, list2 is nothing more than the location of 'next
list, so the printing thing I can't explain, but take a look at this:

>> pnt1: [1 2 3 4 5]
== [1 2 3 4 5]
>> pnt2: next pnt1
== [2 3 4 5]
>> replace pnt1 4 6
== [1 2 3 6 5]
>> print pnt2
2 3 6 5

See? I guess you have to use 'copy to be sure.

Regards,
Rachid