contains(_:)
Returns a Boolean value that indicates whether the asynchronous sequence contains the given element.
Declaration
func contains(_ search: Self.Element) async rethrows -> BoolParameters
- search:
The element to find in the asynchronous sequence.
Return Value
true if the method found the element in the asynchronous sequence; otherwise, false.
Discussion
In this example, an asynchronous sequence called Counter produces Int values from 1 to 10. The contains(_:) method checks to see whether the sequence produces the value 5:
let containsFive = await Counter(howHigh: 10)
.contains(5)
print(containsFive)
// Prints "true"