IterableExtensions<T> extension
Properties
-
firstOrNull
→ T?
-
Returns first element or null otherwise
no setter
Methods
-
any(bool predicate(T element))
→ bool
-
Returns
true if at least one element matches the given predicate.
-
countWhere(bool predicate(T element))
→ int
-
Returns count of elements that matches the given
predicate.
Returns -1 if iterable is null
-
distinctBy<K>(K block(T obj))
→ List<T>
-
Returns a list containing only elements from the given collection
-
filter(bool test(T element))
→ List<T>
-
Returns a list containing only elements matching the given
predicate!
-
filterNot(bool test(T element))
→ List<T>
-
Returns a list containing all elements not matching the given
predicate!
-
filterNotNull()
→ List<T>
-
Returns a list containing all elements that are not null
-
firstWhereOrNull(bool test(T element))
→ T?
-
Returns first element by given predicate or null otherwise
-
forEachIndexed(void action(T element, int index))
→ void
-
Performs the given action on each element on iterable, providing sequential index with the element.
element! the element on the current iteration
index! the index of the current iteration
-
groupBy<T, K>(K keySelector(T e))
→ Map<K, List<T>>
-
Groups elements of the original collection by the key returned by the given
keySelector function
applied to each element and returns a map where each group key is associated with a list of corresponding elements.
-
intersect(Iterable other)
→ Set<T>
-
Returns a set containing all elements that are contained
by both this set and the specified collection.
-
isNotNullOrEmpty()
→ bool
-
Returns
false if this nullable iterable is either null or empty.
-
isNullOrEmpty()
→ bool
-
Returns
true if this nullable iterable is either null or empty.
-
subtract(Iterable<T> other)
→ Set<T>
-
Returns a set containing all elements that are contained
by this collection and not contained by the specified collection.
-
take(int n)
→ List<T>
-
Returns a list containing first
n elements.
-
toSet()
→ Set<T>
-
Convert iterable to set
-
union(Iterable<T> other)
→ Set<T>
-
Returns a set containing all distinct elements from both collections.
