Returns true if the iteration has more elements.

abstract fun hasNext(): Boolean

Returns true if there are elements in the iteration before the current element.

abstract fun hasPrevious(): Boolean

Returns the next element in the iteration.

abstract fun next(): T

Returns the index of the element that would be returned by a subsequent call to next.

abstract fun nextIndex(): Int

Returns the previous element in the iteration and moves the cursor position backwards.

abstract fun previous(): T

Returns the index of the element that would be returned by a subsequent call to previous.

abstract fun previousIndex(): Int

Creates a sequence that returns all elements from this iterator. The sequence is constrained to be iterated only once.

fun <T> Iterator<T>.asSequence(): Sequence<T>

Performs the given operation on each element of this Iterator.

fun <T> Iterator<T>.forEach(operation: (T) -> Unit)

Returns the given iterator itself. This allows to use an instance of iterator in a for loop.

operator fun <T> Iterator<T>.iterator(): Iterator<T>

Returns an Iterator that wraps each element produced by the original iterator into an IndexedValue containing the index of that element and the element itself.

fun <T> Iterator<T>.withIndex(): Iterator<IndexedValue<T>>

An iterator over a mutable collection that supports indexed access. Provides the ability to add, modify and remove elements while iterating.

interface MutableListIterator<T> : 
    ListIterator<T>, 
    MutableIterator<T>