setEquals<T> function
Compares two sets for deep equality.
Returns true if the sets are both null, or if they are both non-null, have the same length, and contain the same members. Returns false otherwise. Order is not compared.
The term "deep" above refers to the first level of equality: if the elements
are maps, lists, sets, or other collections/composite objects, then the
values of those elements are not compared element by element unless their
equality operators (Object.operator==) do so.
See also:
- listEquals, which does something similar for lists.
- mapEquals, which does something similar for maps.
Implementation
bool setEquals<T>(Set<T> a, Set<T> b) {
if (a == null)
return b == null;
if (b == null || a.length != b.length)
return false;
if (identical(a, b))
return true;
for (T value in a) {
if (!b.contains(value))
return false;
}
return true;
}