Instance Methodswift 6.0.3_Concurrency

    filter(_:)

    Creates an asynchronous sequence that contains, in order, the elements of the base sequence that satisfy the given error-throwing predicate.

    iOS
    13.0+
    macOS
    10.15+
    tvOS
    13.0+
    watchOS
    6.0+
    @preconcurrency func filter(_ isIncluded: @escaping (Self.Element) async throws -> Bool) -> AsyncThrowingFilterSequence<Self>
    Mangled symbol
    sSci12_ConcurrencyE6filteryAA27AsyncThrowingFilterSequenceVyxGSb7ElementQzYaKcF What are these?
    FNV24 hash
    2CC0L

    Parameters

    isIncluded

    An error-throwing closure that takes an element of the asynchronous sequence as its argument and returns a Boolean value that indicates whether to include the element in the filtered sequence.

    Returns

    An asynchronous sequence that contains, in order, the elements of the base sequence that satisfy the given predicate. If the predicate throws an error, the sequence contains only values produced prior to the error.

    In this example, an asynchronous sequence called Counter produces Int values from 1 to 10. The filter(_:) method returns true for even values and false for odd values, thereby filtering out the odd values, but also throws an error for values divisible by 5:

    do {
    let stream = Counter(howHigh: 10)
        .filter {
            if $0 % 5 == 0 {
                throw MyError()
            }
            return $0 % 2 == 0
        }
    for try await number in stream {
        print(number, terminator: " ")
    }
} catch {
    print("Error: \(error)")
}
// Prints "2 4 Error: MyError() "