对比两次代码
function fib(max) {
var
t,
a = 0,
b = 1,
arr = [0, 1];
while (arr.length < max) {
t = a + b;
a = b;
b = t;
arr.push(t);
}
return arr;
}
// 测试:
console.log(fib(5)); // [0, 1, 1, 2, 3]
console.log(fib(10)); // [0, 1, 1, 2, 3, 5, 8, 13, 21, 34]
Generator 代码
function* fibs() {
let a = 0;
let b = 1;
while (true) {
yield a;
[a, b] = [b, a + b];
}
}
let [first, second, third, fourth, fifth, sixth,seventh] = fibs();
console.log(seventh);
