ControlNotificationStream.filter(_:)

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:

let stream = Counter(howHigh: 10) .filter { $0 % 2 == 0 } for await number in stream { print(number, terminator: " ") } // Prints "2 4 6 8 10 "

• Parameter isIncluded: A 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.