字符串数组随机删除3并替换为“”，但保留原始索引

function randomDeleteAndReplace(arr, count) {
  // 创建一个数组副本以避免修改原始数组
  let copyArr = arr.slice();
  
  // 确保要删除的数量不超过数组长度
  count = Math.min(count, copyArr.length);
  
  for (let i = 0; i < count; i++) {
    // 生成一个随机索引
    let randomIndex = Math.floor(Math.random() * copyArr.length);
    
    // 替换该索引处的元素为空字符串
    copyArr[randomIndex] = "";
  }
  
  return copyArr;
}

// 示例使用
let strArray = ["apple", "banana", "cherry", "date", "elderberry"];
let modifiedArray = randomDeleteAndReplace(strArray, 3);
console.log(modifiedArray); // 输出可能是 ["", "banana", "", "date", ""]