如果数组中存在数据库，如何检查数据库

SHOW DATABASES;

try {
  const mysql = require('mysql');
  console.log('MySQL driver is installed.');
} catch (error) {
  console.log('MySQL driver is not installed.');
}

const connections = [
  { host: 'localhost', port: 3306, user: 'root', password: 'password' },
  // ...其他连接信息
];

const hasDatabaseConnection = connections.some(conn => 
  conn.host && conn.port && conn.user && conn.password
);

console.log(hasDatabaseConnection ? '存在数据库连接信息' : '不存在数据库连接信息');