CODEWITHSUNDEEP
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MhdBasilE
MhdBasilE

Reputation: 458

how can I sort list items in flutter/dart based on dateTIme and TimeOfDay?

I'm making a Todo app, so I want to sort list of tasks based on date and time chosen by user, currently I'm soring like this, but its not accurate all the time, any other suggestions??

class TaskModel { //model of task
final String? id;
final String? title;
final DateTime? date;
final String? field;
final TimeOfDay? time;
bool isFinished;
TaskModel({
@required this.date,
@required this.id,
@required this.title,
@required this.time,
this.field = 'other',
this.isFinished = false,
});
//method right now I'm using to compare(not efficient)
_tasks.sort((a, b) => a.date!.compareTo(b.date!));
_tasks.sort((a, b) => a.time!.hour.compareTo(b.time!.hour));
_tasks.sort((a, b) => a.time!.minute.compareTo(b.time!.minute));

Upvotes: 1

Views: 584

Answers (1)

Abbasihsn
Abbasihsn

Reputation: 2171

use this:

YOURLIST.sort((a, b)=> a.microsecondsSinceEpoch.compareTo(b.microsecondsSinceEpoch));

you can parse DateTime from date and time that users select as follow:

DateTime testDate = DateTime.parse("2021-08-01 20:18:04");
print(testDate.millisecondsSinceEpoch);

so you can replace 2021-08-01 20:18:04 with selectedDate selectedTime

Upvotes: 1

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