UnmodifiableSetFromISet<T> class

The UnmodifiableSetFromISet is a relatively safe, unmodifiable Set view that is built from an ISet or another Set. The construction of the UnmodifiableSetFromISet is very fast, since it makes no copies of the given set items, but just uses it directly.

If you try to use methods that modify the UnmodifiableSetFromISet, like add, it will throw an UnsupportedError.

If you create it from an ISet, it is also very fast to lock the UnmodifiableSetFromISet back into an ISet.

How does it compare to UnmodifiableSetView from `package:collection`?

The only different between an UnmodifiableSetFromISet and an UnmodifiableSetView is that UnmodifiableSetFromISet accepts both a Set and an ISet. Note both are views, so they are fast to create, but if you create them from a regular Set and then modify that original Set, you will also be modifying the views. Also note, if you create an UnmodifiableSetFromISet from an ISt, then it's totally safe because the original ISet can't be modified.

Constructors

UnmodifiableSetFromISet(ISet<T>? iset): Create an unmodifiable Set view of type UnmodifiableSetFromISet, from an iset.
UnmodifiableSetFromISet.fromSet(Set<T> set): Create an unmodifiable Set view of type UnmodifiableSetFromISet, from another Set.

Properties

first → T: The first element.
no setterinherited
hashCode → int: The hash code for this object.
no setterinherited
isEmpty → bool: Whether this collection has no elements.
no setterinherited
isNotEmpty → bool: Whether this collection has at least one element.
no setterinherited
iterator → Iterator<T>: An iterator that iterates over the elements of this set.
no setteroverride
last → T: The last element.
no setterinherited
length → int: The number of elements in this Iterable.
no setteroverride
lock → ISet<T>: no setter
runtimeType → Type: A representation of the runtime type of the object.
no setterinherited
single → T: Checks that this iterable has only one element, and returns that element.
no setterinherited

Methods

add(T value) → bool: Adds value to the set.
override
addAll(Iterable<T> elements) → void: Adds all elements to this set.
inherited
any(bool test(T element)) → bool: Checks whether any element of this iterable satisfies test.
inherited
cast<R>() → Set<R>: Provides a view of this set as a set of R instances.
inherited
clear() → void: Removes all elements from the set.
inherited
contains(covariant T? element) → bool: Whether value is in the set.
override
containsAll(Iterable<Object?> other) → bool: Whether this set contains all the elements of other.
inherited
difference(Set<Object?> other) → Set<T>: Creates a new set with the elements of this that are not in other.
inherited
elementAt(int index) → T: Returns the indexth element.
inherited
every(bool f(T element)) → bool: Checks whether every element of this iterable satisfies test.
inherited
expand<T>(Iterable<T> f(T element)) → Iterable<T>: Expands each element of this Iterable into zero or more elements.
inherited
firstWhere(bool test(T value), {T orElse()?}) → T: The first element that satisfies the given predicate test.
inherited
fold<T>(T initialValue, T combine(T previousValue, T element)) → T: Reduces a collection to a single value by iteratively combining each element of the collection with an existing value
inherited
followedBy(Iterable<T> other) → Iterable<T>: Creates the lazy concatenation of this iterable and other.
inherited
forEach(void f(T element)) → void: Invokes action on each element of this iterable in iteration order.
inherited
intersection(Set<Object?> other) → Set<T>: Creates a new set which is the intersection between this set and other.
inherited
join([String separator = ""]) → String: Converts each element to a String and concatenates the strings.
inherited
lastWhere(bool test(T value), {T orElse()?}) → T: The last element that satisfies the given predicate test.
inherited
lookup(covariant T element) → T?: If an object equal to object is in the set, return it.
override
map<T>(T f(T element)) → Iterable<T>: The current elements of this iterable modified by toElement.
inherited
noSuchMethod(Invocation invocation) → dynamic: Invoked when a nonexistent method or property is accessed.
inherited
reduce(T combine(T value, T element)) → T: Reduces a collection to a single value by iteratively combining elements of the collection using the provided function.
inherited
remove(covariant Object value) → bool: Removes value from the set.
override
removeAll(Iterable<Object?> elements) → void: Removes each element of elements from this set.
inherited
removeWhere(bool test(T element)) → void: Removes all elements of this set that satisfy test.
inherited
retainAll(Iterable<Object?> elements) → void: Removes all elements of this set that are not elements in elements.
inherited
retainWhere(bool test(T element)) → void: Removes all elements of this set that fail to satisfy test.
inherited
singleWhere(bool test(T value), {T orElse()?}) → T: The single element that satisfies test.
inherited
skip(int n) → Iterable<T>: Creates an Iterable that provides all but the first count elements.
inherited
skipWhile(bool test(T value)) → Iterable<T>: Creates an Iterable that skips leading elements while test is satisfied.
inherited
take(int n) → Iterable<T>: Creates a lazy iterable of the count first elements of this iterable.
inherited
takeWhile(bool test(T value)) → Iterable<T>: Creates a lazy iterable of the leading elements satisfying test.
inherited
toList({bool growable = true}) → List<T>: Creates a List containing the elements of this Iterable.
inherited
toSet() → Set<T>: Creates a Set with the same elements and behavior as this Set.
override
toString() → String: A string representation of this object.
inherited
union(Set<T> other) → Set<T>: Creates a new set which contains all the elements of this set and other.
inherited
where(bool f(T element)) → Iterable<T>: Creates a new lazy Iterable with all elements that satisfy the predicate test.
inherited
whereType<T>() → Iterable<T>: Creates a new lazy Iterable with all elements that have type T.
inherited

Operators

operator ==(Object other) → bool: The equality operator.
inherited