Instance Methodswift 6.1.2_Concurrency

    reduce(into:_:)

    Returns the result of combining the elements of the asynchronous sequence using the given closure, given a mutable initial value.

    iOS
    13.0+
    macOS
    10.15+
    tvOS
    13.0+
    watchOS
    6.0+
    func reduce<Result>(into initialResult: Result, _ updateAccumulatingResult: (inout Result, Self.Element) async throws -> Void) async rethrows -> Result
    Mangled symbol
    sSci12_ConcurrencyE6reduce4into_qd__qd__n_yqd__z_7ElementQztYaKXEtYaKlF What are these?
    FNV24 hash
    2O6ZI

    Parameters

    initialResult

    The value to use as the initial accumulating value. The nextPartialResult closure receives initialResult the first time the closure executes.

    updateAccumulatingResult

    A closure that combines an accumulating value and an element of the asynchronous sequence into a new accumulating value, for use in the next call of the nextPartialResult closure or returned to the caller.

    Returns

    The final accumulated value. If the sequence has no elements, the result is initialResult.

    Use the reduce(into:_:) method to produce a single value from the elements of an entire sequence. For example, you can use this method on a sequence of numbers to find their sum or product.

    The updateAccumulatingResult closure executes sequentially with an accumulating value initialized to initialResult and each element of the sequence.

    Prefer this method over reduce(_:_:) for efficiency when the result is a copy-on-write type, for example an Array or Dictionary.