如何将数组 object 和 map 中的某些值的一部分从 AWS MongoDB 值分离到新数组中？

Question

Actually, I tried to map values (userID, userName & userBirthday) into an array object from the AWS MongoDB and I want to compare is the user's birthday is today or not. In MongoDB, the user's birthday (column name; dateOfBirth ) is stored in this format. "YYYY-MM-DDT00:00:00" So I want to get only month value & date value from this. But I'm unable to split this value from the array. How it can or is any other way to do that? I'm trouble with build this logic. So help would be much appreciated!

const allUsers = await helper.getAllUsers(organizationId); //get all user data
const allUserList = allUsers.Items.map(user => (
 { userId: user.id,
   userFullName: `${user.firstName} ${user.lastName}`,
   userBirthday: user.dateOfBirth 
}));
const thisDay = new Date().getMonth();
const thisMonth = new Date().getDate();

const birthdayUserList = allUserList.filter(
   user => ??????? === thisDay && ??????? === thisMonth
);

In the last code-line, I want to get the date & month value from userBirthday of the allUserList & compare with thisDay & thisMonth . Furthermore, I attached the inside look of the allUserList

[
 { userId: 'xxxxxxxxxxxxxxx', userFullName: 'xxxxx  xxxx' }, userBirthday: 'YYYY-MM-DDT00:00:00'},
 { userId: 'xxxxxxxxxxxxxxx', userFullName: 'xxxxx  xxxx' }, userBirthday: 'YYYY-MM-DDT00:00:00'},
 { userId: 'xxxxxxxxxxxxxxx', userFullName: 'xxxxx  xxxx' }, userBirthday: 'YYYY-MM-DDT00:00:00'},
 { userId: 'xxxxxxxxxxxxxxx', userFullName: 'xxxxx  xxxx' }, userBirthday: 'YYYY-MM-DDT00:00:00'},
 .....
]

Answer 1

const allUsers = await helper.getAllUsers(organizationId); //get all user data
const allUserList = allUsers.Items.map(user => (
 { userId: user.id,
   userFullName: `${user.firstName} ${user.lastName}`,
   userBirthMonth: new Date(user.dateOfBirth).getMonth(),
   userBirthDate: new Date(user.dateOfBirth).getDate()
}));
const thisDay = new Date().getMonth();
const thisMonth = new Date().getDate();

const birthdayUserList = allUserList.filter(user =>
 user.userBirthMonth === currentMonth && user.userBirthDate === currentDate
);

or you can use the month & date together as follows.

{ userBirthday: `${new Date(user.dateOfBirth).getMonth()}-${new Date(user.dateOfBirth).getDate()} }

in the allUserList & you should store the current date as mentioned formate of above.

const currentDate = `${new Date().getMonth()}-${new Date().getDate()}`

Logic can use as follows.

const birthdayUserList = allUserList.filter( user => user.userBirthday === currentDate);