ObjIterableNullExt<E> extension

on

Properties

first → E?
Returns the first element.
no setter
isEmpty → bool?
Whether this collection has no elements.
no setter
isNotEmpty → bool?
Whether this collection has at least one element.
no setter
iterator → Iterator<E>?
Returns a new Iterator that allows iterating the elements of this Iterable.
no setter
last → E?
Returns the last element.
no setter
length → int?
Returns the number of elements in this.
no setter
single → E?
Checks that this iterable has only one element, and returns that element.
no setter

Methods

any(bool test(E element)) → bool?
Checks whether any element of this iterable satisfies test.
cast<R>() → Iterable<R>?
Provides a view of this iterable as an iterable of R instances.
contains(Object? element) → bool?
Whether the collection contains an element equal to element.
elementAt(int index) → E?
Returns the indexth element.
every(bool test(E element)) → bool?
Checks whether every element of this iterable satisfies test.
expand<T>(Iterable<T> toElements(E element)) → Iterable<T>?
Expands each element of this Iterable into zero or more elements.
firstWhere(bool test(E element), {E orElse()?}) → E?
Returns the first element that satisfies the given predicate test.
fold<T>(T initialValue, T combine(T previousValue, E element)) → T?
Reduces a collection to a single value by iteratively combining each element of the collection with an existing value
followedBy(Iterable<E> other) → Iterable<E>?
Returns the lazy concatenation of this iterable and other.
forEach(void action(E element)) → void
Invokes action on each element of this iterable in iteration order.
join([String separator = ""]) → String?
Converts each element to a String and concatenates the strings.
lastWhere(bool test(E element), {E orElse()?}) → E?
Returns the last element that satisfies the given predicate test.
map<T>(T toElement(E e)) → Iterable<T>?
The current elements of this iterable modified by toElement.
reduce(E combine(E value, E element)) → E?
Reduces a collection to a single value by iteratively combining elements of the collection using the provided function.
singleWhere(bool test(E element), {E orElse()?}) → E?
Returns the single element that satisfies test.
skip(int count) → Iterable<E>?
Returns an Iterable that provides all but the first count elements.
skipWhile(bool test(E value)) → Iterable<E>?
Returns an Iterable that skips leading elements while test is satisfied.
take(int count) → Iterable<E>?
Returns a lazy iterable of the count first elements of this iterable.
takeWhile(bool test(E value)) → Iterable<E>?
Returns a lazy iterable of the leading elements satisfying test.
toList({bool growable = true}) → List<E>?
Creates a List containing the elements of this Iterable.
toSet() → Set<E>?
Creates a Set containing the same elements as this iterable.
where(bool test(E element)) → Iterable<E>?
Returns a new lazy Iterable with all elements that satisfy the predicate test.
whereType<T>() → Iterable<T>?
Returns a new lazy Iterable with all elements that have type T.