如何在数组中的所有其他元素之间添加元素

function addElementBetweenElements(arr, newElement) {
  var result = [];
  
  for (var i = 0; i < arr.length; i++) {
    result.push(arr[i]);
    
    if (i !== arr.length - 1) {
      result.push(newElement);
    }
  }
  
  return result;
}

// 示例用法
var originalArray = [1, 2, 3, 4, 5];
var newElement = "new";
var newArray = addElementBetweenElements(originalArray, newElement);

console.log(newArray); // 输出 [1, "new", 2, "new", 3, "new", 4, "new", 5]