Instance Methodswift-nio 2.81.0NIOCore

    map(_:)

    When the current EventLoopFuture<Value> is fulfilled, run the provided callback, which performs a synchronous computation and returns a new value of type NewValue.

    EventLoopFuture.swift:649
    @preconcurrency func map<NewValue>(_ callback: @escaping (Value) -> (NewValue)) -> EventLoopFuture<NewValue>
    Mangled symbol
    s7NIOCore15EventLoopFutureC3mapyACyqd__Gqd__xclF What are these?
    FNV24 hash
    47IDY

    Parameters

    callback

    Function that will receive the value of this EventLoopFuture and return a new value lifted into a new EventLoopFuture.

    Returns

    A future that will receive the eventual value.

    Operations performed in map should not block, or they will block the entire event loop. map is intended for use when you have a data-driven function that performs a simple data transformation that cannot error.

    If you have a data-driven function that can throw, you should use flatMapThrowing instead.

    let future1 = eventually()
let future2 = future1.map { T -> U in
    ... stuff ...
    return u
}
let future3 = future2.map { U -> V in
    ... stuff ...
    return v
}