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Instance Method

mapEach(_:)

Gets the value of a key path for each element in the sequence that is wrapped by an EventLoopFuture.
func mapEach<Result>(_ keyPath: KeyPath<Value.Element, Result>) -> EventLoopFuture<[Result]>

Parameters

keyPath

The key path to access on each element in the sequence.

Return Value

A new EventLoopFuture that wraps the sequence of key path values.

Discussion

let collection = eventLoop.future(["a", "bb", "ccc", "dddd", "eeeee"])
let lengths = collection.mapEach(\.count)
// lengths: EventLoopFuture([1, 2, 3, 4, 5])