trampoline sample

test798.js

function factorial(n, a) {
	a = a||1;
	if(n===0) {
		return a;
	}
	return function() {
		return factorial(n-1, a*n);
	}
}

function trampoline(c, p) {
	var r = c(p);
	while(typeof r === 'function') {
		r = r();
	}
	return r;
}

console.log(trampoline(factorial, 100));