var iota = [n |
	var iter = [start stop |
		if (start >= stop) [[]] [flat start (iter (start+1) stop)]
	];
	iter 0 n
];

var map = [array fun|
	var iter = [start stop |
		if (start >= stop) [[]] [flat (fun (array.start)) (iter (start+1) stop)]
	];
	iter 0 (len array)
];

var each = [array fun|
	var iter = [start stop |
		if (start >= stop) [nil] [fun (array.start); iter (start+1) stop]
	];
	iter 0 (len array)
];

var cdur = c47;