containsValue method Null safety
- Object? value
override
Returns true if this map contains the given value
.
Returns true if any of the values in the map are equal to value
according to the ==
operator.
Implementation
bool containsValue(Object? value) {
int initialSplayCount = _splayCount;
bool visit(_SplayTreeMapNode<K, V>? node) {
while (node != null) {
if (node.value == value) return true;
if (initialSplayCount != _splayCount) {
throw ConcurrentModificationError(this);
}
if (node.right != null && visit(node.right)) {
return true;
}
node = node.left;
}
return false;
}
return visit(_root);
}