1. Fool newbie question
G'day all
Using a "for" loop to look at each element of a sequence, e.g.
for i = 1 to length(seq)
is the results of length(seq) re-evaluated for each pass thru the loop? Two
reasons for asking:
1. if so, then
x = length(seq)
for i = 1 to x
would be more "efficient"??
2. shortening / truncating the sequence in one of the loops will
stop the loop?? Or just crash and burn when trying to reference
the now nonexistent part of the original sequence??
TIA
Regards
Tony
2. Re: Fool newbie question
Tony Bucholtz wrote:
> Using a "for" loop to look at each
> element of a sequence, e.g.
> for i = 1 to length(seq)
> is the results of length(seq) re-evaluated
> for each pass thru the loop?
No; here's a demonstration:
sequence s
s = "1"
for i = 1 to length( s ) do
s &= "2"
end for
puts( 1, s )
If it was re-evaluated each time, you'de be in an endless loop.
-- David Cuny
3. Re: Fool newbie question
G'day all
David, thanks for that - I hadn't thought of the reverse case (a growing
sequence)
Regards
Tony
