尝试返回以升序排序的给定数组的副本

Question

我试图先复制一个数组，然后修改它并按升序对其进行排序。我的分类正确，但是我似乎不记得如何先复制数组并使原始数组保持不变。这是代码：

function copyAndSortNumbers(numbers) {
  return numbers.sort(function(a, b) {return a-b} );
}

/* Do not modify code below this line */

const original = [1, 7, 3, 5];
const sortedCopy = copyAndSortNumbers(original);

console.log(original, '<-- should be [1, 7, 3, 5]');
console.log(sortedCopy, '<-- should be [1, 3, 5, 7]');