Returns the average of two or more numbers.

Use Array.prototype.reduce() to add each value to an accumulator, initialized with a value of 0, divide by the length of the array.

代码片段

const average = (...nums) => nums.reduce((acc, val) => acc + val, 0) / nums.length;

使用样例

average(...[1, 2, 3]); // 2
average(1, 2, 3); // 2