I've been exploring Perl6 since Rakudo-star was released in late July. There's a lot of exciting things to learn about Perl6, and you have to start early to figure things out. I've been working on implementing a simple sudoku solver, as something to do. My conclusion is that I'm delighted with what's been done, and what's coming ... and frustrated waiting for what's coming to turn into usable features! Sudoku In case you've been on Mars the last few years, sudoku is a puzzle with nine rows and nine columns. That block is also divided into 3x3 regions ... like a tic-tac-toe board subdivided into tic-tac-toe boards. When solved, each row contains the digits 1 to 9, without repetition; so does each column, and each block. Each puzzle begins with a certain number of cells filled in, your job is to figure out the rest. You know that cell A1 can't be a 1, because there's a one already in that row, it can't be a 2 or 4 or 6 or 7 or 8. From the othe...