On Thursday, 21 April 2022 at 05:00:53 UTC, Alain De Vos wrote:
This example limits the maximum value returned by the fibonacci
function. f(n) < limit
But it does not allow to return the n-th element of a fibonacci
function.
You are free to use ```take():```
```d
struct FibonacciRange(long l) { /*...*/ }
enum limit = long.max;
void main()
{
FibonacciRange!limit fibs;
auto fibFirst90 = fibs.take(90);
auto total = fibFirst90.sum;
total.writeln; // "7540113804746346428" == fib(92)-1
auto fibInfinite = recurrence!("a[n-1] + a[n-2]")(1L, 1L);
assert(fibInfinite.take(92).array[$-1]-1 == total);
}
```
SDB@79
