function fn(i) {
            if (i == 2 || i == 1) {
                return 1;
            }
            return fn(i - 1) + fn(i - 2)
        }
        var o = []
        for (var i = 1; i <= 10; i++) {
            var a = fn(i)
            o.push(a)
        }
        console.log(o);
        console.log(arr);
        console.log(o === arr);  //false