I have many strings and I want to use as associative array kay a sorted concat
of two strings (it's a signature of the two strings):
import std.algorithm;
void main() {
string a = "red";
string b = "green";
int[string] aa;
//aa[(a ~ b).sort] = 1;
//aa[(a ~ b).sort.idup] = 1;
aa[(a.dup ~ b.dup).sort.idup] = 1;
}
I think the first way used to work, the second way was recently forbidden (and
you can't use char[] as associative array key). The third way now works, but
array.sort will go away.
So do you know what's a copy-minimizing (and possibly short) way to perform
this, in future?
Bye and thank you,
bearophile
