将数组转换为具有来自数组元素中的公共属性的键的对象

function convertArrayToObject(arr) {
  if (arr.length === 0) {
    return {};
  }
  
  const firstElement = arr[0];
  const commonProperties = Object.keys(firstElement);
  const result = {};
  
  for (let i = 0; i < arr.length; i++) {
    const element = arr[i];
    
    for (let j = 0; j < commonProperties.length; j++) {
      const property = commonProperties[j];
      
      if (element.hasOwnProperty(property)) {
        result[property] = element[property];
      }
    }
  }
  
  return result;
}

// 示例用法
const array = [
  { name: 'Alice', age: 25, gender: 'female' },
  { name: 'Bob', age: 30, gender: 'male' },
  { name: 'Charlie', age: 35, gender: 'male' }
];

const object = convertArrayToObject(array);
console.log(object);

{
  name: 'Charlie',
  age: 35,
  gender: 'male'
}