On Friday, 25 September 2015 at 12:51:17 UTC, Russel Winder wrote:
On Fri, 2015-09-25 at 09:14 +0000, mzfhhhh via
Digitalmars-d-learn wrote:
[...]
Aha, bingo, spot on. Thanks. Amended now to:
double reduce_string_loop() {
return reduce!"a + 1.0 / (b * b)"(iota(1, 100));
}
double reduce_function_loop() {
return reduce!((t, n) => t + 1.0 / (n * n))(iota(1, 100));
}
which both work as they should. I am sure I will be able to
find a reason why I missed that reduce takes a function of two
parameters not one.
Interesting question on style is whether to use function
application or method call:
reduce!"a + 1.0 / (b * b)"(iota(1, 100))
vs.
iota(1, 100).reduce!"a + 1.0 / (b * b)"
The debate may well turn into a bikeshed one, but it would be
good to know what the opinions are.
I vastly prefer the UFCS version, but unfortunately reduce has
its arguments the wrong way around for that if you use the
version that takes a seed...
