CODEWITHSUNDEEP
flutterdart
Joan Farfán Armas
Joan Farfán Armas

Reputation: 265

Is there a better way to compare a date against another?

My code is:

  for (var rt in list) {
    if (rt.date.day == date2.day &&
        rt.date.month == date2.month &&
        rt.date.year == date2.year) {
      ...
    }
  }

Is there a better way to compare a date against another?

Upvotes: 0

Views: 208

Answers (3)

jamesdlin
jamesdlin

Reputation: 90025

You can make a helper function to strip off the time:

DateTime dateOnly(DateTime dateTime) => DateTime(dateTime.year, dateTime.month, dateTime.day);

and then you can use DateTime's normal operator ==:

if (dateOnly(rt.date) == dateOnly(date2)) {
  ...
}

Note that the above example assumes both dates are in the same time zone. If they might be in different time zones, you should precisely define what it means for two DateTimes to have the same "date" and convert both to a common time zone (possibly UTC).

Upvotes: 1

Faaatman
Faaatman

Reputation: 495

Use difference:

 for (var rt in list) {
    if (rt.date.difference(date2).inDays == 0) {
      ...
    }
  }

Documentation link: https://api.flutter.dev/flutter/dart-core/DateTime/difference.html

Upvotes: 1

matthias_code
matthias_code

Reputation: 1023

You could check the difference between the two dates (date.difference(otherDate), I think) and check that the difference between those two is miniscule, which in your context might make them "equal"

But yeah, turns out date-comparisons can be a bit fiddly! :)

Upvotes: 0

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