我可以在 JavaScript 中将新数组重新分配给数组变量吗？

function reverseArray(array) {
  var new_array = [];
  for (var i = array.length-1; i >= 0; i--)
    new_array.push(array[i]);
  return new_array;
}

function reverseArrayInPlace(array) {
  array = reverseArray(array);
}
	
var r1 = [1,2,3,4,5,6,7,8,9,10];

console.log("r1 ", r1.join(",")); 
// → 1,2,3,4,5,6,7,8,9,10

console.log("reverse of r1 ", reverseArray(r1).join(","));
// → 10,9,8,7,6,5,4,3,2,1

console.log("r1 ", r1.join(","));
// → 1,2,3,4,5,6,7,8,9,10

reverseArrayInPlace(r1);
// the changes are not reflected here

console.log("r1 reversed in place ", r1.join(",")); 
// → still 1,2,3,4,5,6,7,8,9,10;
// this should display r1 = 10,9,8,7,6,5,4,3,2,1

var a = 5;
function change(a) {
  // Inner 'a'
  a = 0;
  console.log("inside change : ", a);
}

// Outer 'a'
change(a); // → 0
console.log("outside change : ", a); // → 5

var o = {
  arr1: [1, 2, 3],
  arr2: [1, 2, 3],
  str: "foo",
  num: 1
};

console.log("before changing : ", o);

function change(a) {
  // Reassigning to properties of 'a'
  a.arr1[0] = 0;
  a.arr2 = [ "destroyed" ];
  a.str += " bar";
  a.num = a.num * 15;
  
  // Reassigning to 'a'
  a = { change: "Destroyed !" };
  
  console.log("inside change : ", a);
}


change(o); // → { change: "Destroyed !" }
console.log("outside change : ", o); // → initial 'o' with modified properties.