Instance Methodswift-algorithms 1.2.1Algorithms->Swift

    reductions(_:_:)

    Returns a sequence containing the accumulated results of combining the elements of the sequence using the given closure.

    Reductions.swift:37
    func reductions<Result>(_ initial: Result, _ transform: @escaping (Result, Element) -> Result) -> ExclusiveReductionsSequence<Elements, Result>
    Mangled symbol
    ss20LazySequenceProtocolP10AlgorithmsE10reductionsyAC019ExclusiveReductionsB0Vy8ElementsQzqd__Gqd___qd__qd___7ElementQztctlF What are these?
    FNV24 hash
    2CODI

    Parameters

    initial

    The value to use as the initial value.

    transform

    A closure that combines the previously reduced result and the next element in the receiving sequence.

    Returns

    A sequence of the initial value followed by the reduced elements.

    This can be seen as applying the reduce function to each element and providing the initial value followed by these results as a sequence.

    let runningTotal = [1, 2, 3, 4].lazy.reductions(0, +)
print(Array(runningTotal))

// prints [0, 1, 3, 6, 10]