when 'f' {
    say "You ran away from the $enemy.name()!"
}
if ($.weapons.exists($_)) {
    .attack($enemy, $.weapons{$_});
}
else {
    say "Please enter a valid command!"
}

##</code><code>##

when 'f'       { say "You ran away from the { $enemy.name }!" }
when $.weapons { .attack($enemy, $.weapons{$_}); }
default        { say "Please enter a valid command!" }