奇數次執行的時候打印 1，偶數次執行的時候打印 2的函數

function test() {

test.count = test.count ? test.count+1 : 1

if (test.count % 2 === 0) {

console.log(2)

} else {

console.log(1)

}

}

test()

function countFn() {

let count = 0;

return function (...args) {

count++;

if (count & 1 === 1) return console.log(1);

console.log(2);

}

}

const testFn = countFn();

testFn(); // 1

testFn(); // 2

testFn(); // 1

testFn(); // 2

testFn(); // 1

testFn(); // 2

function* Print() {

while (true) {

yield console.log("1");

yield console.log("2");

}

}

let p = Print()

function myprint() {

p.next()

}

myprint()

myprint()

myprint()

}

責任編輯：Rex_08