想學習並精通 Roc 嗎？

print_remaining! = |todos|
	todos
		.keep_if(|todo| todo.status != Done)
		.for_each!(|todo| echo!("- ${todo.name}\n"))

main! = |_args| {
	todos = [
		{ name: "Buy groceries", status: Done },
		{ name: "Join Exercism", status: Done },
		{ name: "Learn Roc",     status: InProgress },
		{ name: "Call mom",      status: NotStarted },
	]
	print_remaining!(todos)
	Ok({})
}