如何将哈希数组合并为一个数组？

function mergeHashArrays(hashArrays) {
  var mergedArray = [];
  
  // 遍历哈希数组
  for (var i = 0; i < hashArrays.length; i++) {
    var hashArray = hashArrays[i];
    
    // 遍历哈希表中的键值对
    for (var key in hashArray) {
      if (hashArray.hasOwnProperty(key)) {
        var value = hashArray[key];
        
        // 将键值对存储到新的数组中
        mergedArray.push({ key: key, value: value });
      }
    }
  }
  
  return mergedArray;
}

// 示例用法
var hashArrays = [
  { key1: 'value1', key2: 'value2' },
  { key3: 'value3', key4: 'value4' }
];

var merged = mergeHashArrays(hashArrays);
console.log(merged);

[
  { key: 'key1', value: 'value1' },
  { key: 'key2', value: 'value2' },
  { key: 'key3', value: 'value3' },
  { key: 'key4', value: 'value4' }
]