Adds value
to the set.
Returns true
if value
(or an equal value) was not yet in the set. Otherwise returns false
and the set is not changed.
Example:
var set = new Set(); var time1 = new DateTime.fromMillisecondsSinceEpoch(0); var time2 = new DateTime.fromMillisecondsSinceEpoch(0); // time1 and time2 are equal, but not identical. Expect.isTrue(time1 == time2); Expect.isFalse(identical(time1, time2)); set.add(time1); // => true. // A value equal to time2 exists already in the set, and the call to // add doesn't change the set. set.add(time2); // => false. Expect.isTrue(set.length == 1); Expect.isTrue(identical(time1, set.first));
bool add(E value);
© 2012 the Dart project authors
Licensed under the Creative Commons Attribution-ShareAlike License v4.0.
https://api.dartlang.org/stable/2.0.0/dart-core/Set/add.html