ListSet<T> class

A ListSet is, at the same time:

1. A mutable, fixed-sized, ordered, Set.
2. A mutable, fixed-sized, List, in which values can't repeat.

When viewed as a Set and compared to a LinkedHashSet, a ListSet is also ordered and has a similar performance. But a ListSet takes less memory and can be sorted, just like a list. Also, you can directly get its items by index. The disadvantage, of course, is that ListSet has a fixed size, while a LinkedHashSet does not.

The ListSet is efficient both as a List and as a Set. So, for example, it has an efficient sort method, while a LinkedHashSet would force you to turn it into a List, then sort it, than turn it back into a Set.

Implemented types

• Set<T>
• List<T>

Implementers

• ListSetView

Available extensions

• EnumByName
• FicIterableExtension
• FicIterableExtensionTypeNullable
• FicIterableOfMapEntryExtension
• FicListExtension
• FicListExtensionNullable
• FicSetExtension
• FICZipExtension
• FutureIterable
• IterableExtensions
• ListToJSArray
• NullableIterableExtensions

Constructors

ListSet.empty()

ListSet.fromJson(dynamic json, T fromJsonT(Object?))

Converts from JSon. Json serialization support for json_serializable with @JsonSerializable.

factory

ListSet.of(Iterable<T> items, {bool sort = false, int compare(T a, T b)?})

Create a ListSet from the items iterable.

Properties

first ↔ T

The first element.

getter/setter pair, override

hashCode → int

The hash code for this object.

no setter, inherited

isEmpty → bool

Whether this collection has no elements.

no setter, override

isNotEmpty → bool

Whether this collection has at least one element.

no setter, override

iterator → Iterator<T>

An iterator that iterates over the elements of this set.

no setter, override

last ↔ T

The last element.

getter/setter pair, override

length ↔ int

The number of elements in this Iterable.

getter/setter pair, override

reversed → Iterable<T>

An Iterable of the objects in this list in reverse order.

no setter, override

reversedView → ListSet<T>

no setter

runtimeType → Type

A representation of the runtime type of the object.

no setter, inherited

single → T

Checks that this iterable has only one element, and returns that element.

no setter, override

Methods

add(T value) → bool

Adds value to the set.

override

addAll(Iterable<T> elements) → void

Adds all elements to this set.

override

any(Predicate<T> test) → bool

Checks whether any element of this iterable satisfies test.

override

asMap() → Map<int, T>

An unmodifiable Map view of this list.

override

cast<E>() → ListSet<E>

Provides a view of this set as a set of R instances.

override

clear() → void

Removes all elements from the set.

override

contains(covariant T? value) → bool

Whether value is in the set.

override

containsAll(covariant Iterable<T?> other) → bool

Whether this set contains all the elements of other.

override

difference(covariant Set<T?> other) → Set<T>

Creates a new set with the elements of this that are not in other.

override

elementAt(int index) → T

Returns the indexth element.

override

every(Predicate<T> test) → bool

Checks whether every element of this iterable satisfies test.

override

expand<E>(Iterable<E> f(T element)) → Iterable<E>

Expands each element of this Iterable into zero or more elements.

override

fillRange(int start, int end, [T? fillValue]) → void

Overwrites a range of elements with fillValue.

override

firstWhere(Predicate<T> test, {T orElse()?}) → T

The first element that satisfies the given predicate test.

override

fold<E>(E initialValue, E combine(E previousValue, T element)) → E

Reduces a collection to a single value by iteratively combining each element of the collection with an existing value

override

followedBy(Iterable<T> other) → Iterable<T>

Creates the lazy concatenation of this iterable and other.

override

forEach(void f(T element)) → void

Invokes action on each element of this iterable in iteration order.

override

getRange(int start, int end) → Iterable<T>

Creates an Iterable that iterates over a range of elements.

override

indexOf(T element, [int start = 0]) → int

The first index of element in this list.

override

indexWhere(Predicate<T> test, [int start = 0]) → int

The first index in the list that satisfies the provided test.

override

insert(int index, T element) → void

Inserts element at position index in this list.

override

insertAll(int index, Iterable<T> iterable) → void

Inserts all objects of iterable at position index in this list.

override

intersection(covariant Set<T?> other) → Set<T>

Creates a new set which is the intersection between this set and other.

override

join([String separator = ""]) → String

Converts each element to a String and concatenates the strings.

override

lastIndexOf(T element, [int? start]) → int

The last index of element in this list.

override

lastIndexWhere(Predicate<T> test, [int? start]) → int

The last index in the list that satisfies the provided test.

override

lastWhere(Predicate<T> test, {T orElse()?}) → T

The last element that satisfies the given predicate test.

override

lookup(Object? object) → T?

If an object equal to object is in the set, return it.

override

map<E>(E f(T e)) → Iterable<E>

The current elements of this iterable modified by toElement.

override

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.

override

remove(Object? value) → bool

Removes value from the set.

override

removeAll(Iterable<Object?> elements) → void

Removes each element of elements from this set.

override

removeAt(int index) → T

Removes the object at position index from this list.

override

removeLast() → T

Removes and returns the last object in this list.

override

removeRange(int start, int end) → void

Removes a range of elements from the list.

override

removeWhere(Predicate<T> test) → void

Removes all elements of this set that satisfy test.

override

replaceRange(int start, int end, Iterable<T> replacement) → void

Replaces a range of elements with the elements of replacements.

override

retainAll(Iterable<Object?> elements) → void

Removes all elements of this set that are not elements in elements.

override

retainWhere(Predicate<T> test) → void

Removes all elements of this set that fail to satisfy test.

override

setAll(int index, Iterable<T> iterable) → void

Overwrites elements with the objects of iterable.

override

setRange(int start, int end, Iterable<T> iterable, [int skipCount = 0]) → void

Writes some elements of iterable into a range of this list.

override

shuffle([Random? random]) → void

Shuffles the elements of this list randomly.

override

singleWhere(Predicate<T> test, {T orElse()?}) → T

The single element that satisfies test.

override

skip(int count) → Iterable<T>

Creates an Iterable that provides all but the first count elements.

override

skipWhile(bool test(T value)) → Iterable<T>

Creates an Iterable that skips leading elements while test is satisfied.

override

sort([int compare(T a, T b)?]) → void

Sorts this list according to the order specified by the compare function.

override

sublist(int start, [int? end]) → List<T>

Returns a new list containing the elements between start and end.

override

take(int count) → Iterable<T>

Creates a lazy iterable of the count first elements of this iterable.

override

takeWhile(bool test(T value)) → Iterable<T>

Creates a lazy iterable of the leading elements satisfying test.

override

toJson(Object? toJsonT(T)) → Object

Converts to JSon. Json serialization support for json_serializable with @JsonSerializable.

toList({bool growable = true}) → List<T>

Creates a List containing the elements of this Iterable.

override

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(covariant Set<T> other) → Set<T>

Creates a new set which contains all the elements of this set and other.

override

where(Predicate<T> test) → Iterable<T>

Creates a new lazy Iterable with all elements that satisfy the predicate test.

override

whereType<E>() → Iterable<E>

Creates a new lazy Iterable with all elements that have type T.

override

Operators

operator +(List<T> other) → ListSet<T>

Returns the concatenation of this list and other.

override

operator ==(Object other) → bool

The equality operator.

inherited

operator [](int index) → T

The object at the given index in the list.

override

operator []=(int index, T value) → void

Sets the value at the given index in the list to value.

override

Static Methods

unsafeView<T>(Set<T> set) → ListSet<T>

Creates a ListSet form the given set. If the set is already of type ListSet, return the same instance. This is unsafe because a ListSetView is fixed size, but the given set may not.