On Saturday, 26 July 2025 at 23:08:35 UTC, luafyn wrote:
alias U = ReturnType!fn;
`ReturnType!(fn!T)` works
id avoid being this explicit with types tho, type inference is
unidirectional in d, its best to lean into it and follow the
natural flow
On Saturday, 26 July 2025 at 20:35:14 UTC, Brother Bill wrote:
I think that if someone is starting with "Programming in D",
that sample code that is exhaustive would be helpful.
It'll be great to see what you come up with. Thanks for taking
such a hands-on approach!
Andy
Why doesn't this work?
```d
import std;
struct Optional(T)
{
T value;
bool hasValue;
}
auto map(alias fn, T)(Optional!T m)
{
alias U = ReturnType!fn;
if (m.hasValue) {
return Optional!U(fn(m.value), true);
} else {
return Optional!U();
}
}
void main()
{
Brother Bill via Digitalmars-d-learn wrote:
I think that if someone is starting with "Programming in D", that sample
code that is exhaustive would be helpful.
I am one of those where code snippets are not an effective way to learn.
I need real working code that I can "play" with.
Turning a c
On Saturday, 26 July 2025 at 17:48:43 UTC, Monkyyy wrote:
On Friday, 25 July 2025 at 21:27:55 UTC, Brother Bill wrote:
On Friday, 25 July 2025 at 18:47:19 UTC, Ali Çehreli wrote:
On 7/25/25 4:10 AM, Brother Bill wrote:
> On Friday, 25 July 2025 at 10:56:08 UTC, novicetoo wrote:
>> check https:/
On Friday, 25 July 2025 at 21:27:55 UTC, Brother Bill wrote:
On Friday, 25 July 2025 at 18:47:19 UTC, Ali Çehreli wrote:
On 7/25/25 4:10 AM, Brother Bill wrote:
> On Friday, 25 July 2025 at 10:56:08 UTC, novicetoo wrote:
>> check https://ddili.org/ders/d.en/index.html
>> under "Code samples as a
