setEquals<T> function
Null safety
Compares two sets for element-by-element 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.
If the elements are maps, lists, sets, or other collections/composite objects, then the contents of those elements are not compared element by element unless their equality operators (Object.==) do so. For checking deep equality, consider using DeepCollectionEquality class.
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 (final T value in a) {
if (!b.contains(value)) {
return false;
}
}
return true;
}