mapEquals<T, U> function
Null safety
Compares two maps for element-by-element equality.
Returns true if the maps are both null, or if they are both non-null, have the same length, and contain the same keys associated with the same values. Returns false otherwise.
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:
- setEquals, which does something similar for sets.
- listEquals, which does something similar for lists.
Implementation
bool mapEquals<T, U>(Map<T, U>? a, Map<T, U>? 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 key in a.keys) {
if (!b.containsKey(key) || b[key] != a[key]) {
return false;
}
}
return true;
}