On Sat, 2015-05-09 at 09:49 -0700, Ali Çehreli via Digitalmars-d-learn wrote:
>
[…]
> BigInt factorial(size_t n)
> {
> return bigInts(1).take(n).reduce!((a, b) => a *= b);
> }
I wonder if that should be a * b rather than a *= b?
It turns out that 2.067 fixes the integrality of BigInts so:
reduce!"a * b"(one, iota(BigInt(one), n + one));
works fine – one is immutable(BigInt(1)).
Many interesting performance issues around using take versus iota.
--
Russel.
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