On Sunday, 5 November 2023 at 18:36:40 UTC, Ctn-Dev wrote:
I wrote this earlier:
[...]
if runs when both "One" and "Two" are in the given array as
intended, but its conditional statement looks verbose. Is there
a more concise way of getting the same result?
Yes, assuming you accept to drop your string arrays then one is
to use bit flags:
```d
enum NumTraitBits
{
Empty,
One = 0x01,
Two = 0x02,
Three = 0x04,
// ...
_ = 0xF0
}
NumTraitBits numeric_traits_1 = NumTraitBits.Empty;
NumTraitBits numeric_traits_2 = NumTraitBits.Two;
NumTraitBits numeric_traits_3 = NumTraitBits.One;
NumTraitBits numeric_traits_4 = NumTraitBits.Two |
NumTraitBits.One;
void main() {
import std.stdio, std.traits;
void numeric_traits_contains(NumTraitBits numeric) {
write("contains: ");
foreach (i; EnumMembers!NumTraitBits)
if (numeric & i) write(" ", i);
writeln();
}
numeric_traits_contains(numeric_traits_1);
numeric_traits_contains(numeric_traits_2);
numeric_traits_contains(numeric_traits_3);
numeric_traits_contains(numeric_traits_4);
}
```
