ControlNotificationStream.drop(while:)

Use drop(while:) to omit elements from an asynchronous sequence until the element received meets a condition you specify.

In this example, an asynchronous sequence called Counter produces Int values from 1 to 10. The drop(while:) method causes the modified sequence to ignore received values until it encounters one that is divisible by 3:

let stream = Counter(howHigh: 10) .drop { $0 % 3 != 0 } for await number in stream { print(number, terminator: " ") } // Prints "3 4 5 6 7 8 9 10 "

After the predicate returns false, the sequence never executes it again, and from then on the sequence passes through elements from its underlying sequence as-is.

• Parameter predicate: A closure that takes an element as a parameter and returns a Boolean value indicating whether to drop the element from the modified sequence.
• Returns: An asynchronous sequence that skips over values from the base sequence until the provided closure returns false.