#!/usr/bin/perl

use Coro;
use Coro::Cont;

sub mul23 : Cont {
   yield 2*shift;
   yield 3*shift;
}

my %hash = (1,10,2,20,3,30);

%hash = map mul23($_), %hash;

print join(",", %hash), "\n";

# here is a random-number generator

sub badrand : Cont {
   my $seed = 1;
   while() {
      $seed = $seed * 121 % 97;
      yield $seed % $_[0];
   }
}

print badrand($_), " " for 1..30; print "\n";