javascript - javascript 中使用 math.floor 函数反转数组

Question

为什么我的函数不在控制台中打印反转的数组？

var numbers = [1, 2, 3, 4, 5, 6, 7];

function swap(array) {
  for (var i = 0; i < Math.floor(array / 2); i++) {
    var temp = array[i];
    array[i] = array[array.length - 1 - i];
    array[array.length - 1 - i] = temp;
  }
  return array;
}
console.log(swap(numbers));

Answer 1

此行 Math.floor(array/2) 存在问题。它必须是 Math.floor(array.length/2)

var numbers = [1, 2, 3, 4, 5, 6, 7];

function swap(array) {
  for (var i = 0; i < Math.floor(array.length / 2); i++) {
    var temp = array[i];
    array[i] = array[array.length - 1 - i];
    array[array.length - 1 - i] = temp;
  }
  return array;
}
console.log(swap(numbers));