byte array to hex string

gistfile1.d

import std.stdio;
import std.format;
import std.array;

void main()
{
	ubyte[] data = [0xAA, 0xFF];
	
	auto app = appender!string();

	foreach(b; data)
		formattedWrite(app, "%02X", b);

	writeln(app.data); // AAFF
}