Warning !
In this thread we've seen three looping mechanisms been presented
as equivalent ( pairwise, first i and ii then ii and iii):
i)
N = DCOUNT( PRODS,@VM)
FOR II=1 TO N
X = PRODS<1,II>
...
NEXT II
ii)
>>LOOP
>> REMOVE PROD FROM PRODS SETTING MORE.PRODS
>> ...do stuff...
>>WHILE MORE.PRODS
>>REPEAT
>>
>>
>
>
>
iii)
>SELECT PRODS
>and then
>READNEXT PROD ELSE DONE = TRUE
>
>
>
They are not!
i) extracts full values regardless of the presence of lower level
marks in them.
ii) extracts the smallest items between marks of any level
iii) extracts fields ( attibutes ) .
except in the common case that there is only one level of marks
(and that the first and third are adjusted to that level of course )
-- mats
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