javascript - 生成器函数 - = 上的星号是什么意思？

Question

我正在浏览 Nodeschool exercise on Generators .

第二个练习的答案是这样的:

function *factorial (n) {
  var result = 1;
  for (var i = 1; i <= n; i++) {
    result *= i;
    yield result;
  }
}

for (var n of factorial(5)) {
  console.log(n)
}

result *= i 是什么意思？

Answer 1

Object-Oriented JavaScript - Second Edition: There is also a family of operators that are a combination of an assignment and an arithmetic operator. These are called compound operators. They can make your code more compact.

让我们看看其中的一些示例:

var a = 5;
a = a + 3; // 8

更短的方式:

var a = 5;
a += 3; // 8

在您的代码中:

result *= i; 

相当于:

result = result * i;