FilterIterator

Lazily keeps the elements of another iterator that satisfy a predicate. Get one from filter(); collect the results with toList().

FilterIterator(It source, Predicate include)

Initializes an iterator keeping the source's matching elements.

bool hasValue()

Returns true if there are more matching elements.

Input& value()

Returns the next matching element.

void increment()

Advances past the current element.

MappedIterator<Output, Input, FilterIterator<Input, It, Predicate>, Pred> map<Output, Pred: Output(Input&)>(Pred transform)

Lazily transforms the elements.

MappedIterator<Output, Input, FilterIterator<Input, It, Predicate>, Pred> map<Output, T: Copyable, Pred: Output(T)>(Pred transform)

Lazily transforms the elements.

ChainIterator<Input, FilterIterator<Input, It, Predicate>, Other> chain<Other>(Other other)

Lazily appends another iterator's elements.

void print(OutputStream& stream)

Prints the remaining values in list form, e.g. [1, 2, 3].

List<Input> toList()

Collects the remaining elements into a list by copying them; only sound for Copyable elements.

Input sum()

Returns the sum of the remaining elements, or zero if there are none.