Re: How to sort byCodeUnit.permutations.filter(...)

[Uknown via Digitalmars-d-learn]

On Tuesday, 12 June 2018 at 14:21:48 UTC, Adam D. Ruppe wrote:
On Monday, 11 June 2018 at 04:39:54 UTC, Uknown wrote:
Why are the strings getting modified?

I'm guessing it reuses a buffer as it iterates.

"123".byCodeUnit.permutations.writeln;//[123, 213, 312, 132, 
231, 321]

[...]

        "1234567".byCodeUnit
                .permutations
                .map!(to!int)
                .filter!(a => primes.canFind(a))
                .maxElement


that should do it too.

I solved the problem by piping the output to `sort`, but your 
workaround is useful. I'll submit a bug report on this ASAP. 
Thanks for your help!