(into initialResult: Result, _ updateAccumulatingResult: (inout Result, Self.Element) throws -> ()) rethrows -> Result</a> <span class="required">Required</span><div class="comment collapse in" id="comment-reduce_into-10a1c7283e52d8f79e866ead2add1bdf"><p>Returns the result of combining the elements of the sequence using the
given closure.</p>
<p>Use the <code>reduce(into:_:)</code> method to produce a single value from the
elements of an entire sequence. For example, you can use this method on an
array of i