Extremely simple decision tree implementation

dtree.js

function dtree_decide(tree, ...argv) {
	var i, len, r;

	for(i = 0, len = tree.length; i < len; i++)
		if((r = tree[i](...argv)))
			return r;
	return false;
}

function dtree_make(tree) {
	return (...argv) => dtree_decide.call(null, tree, ...argv);
}

Sample usage:

const decide = dtree_make([
	(n) => n % 3 && "Not a multiple of 3",
	(y) => !(y % 4) && ((y % 100) || !(y % 400)) && "Leap year",
	(x, y) => 10-x > 5 && 10-y > 5 && "Below the center" 
])

decide(600 / 3 * 2); // Not a multiple of 3
decide(600 * 4); // Leap year
decide(3, 4); // Below the center