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Programming-Idioms

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Idiom #185 Execute function in 30 seconds

Schedule the execution of f(42) in 30 seconds.

let id = setTimeout(f, 30000, 42);

The second arg is the delay in milliseconds.

The subsequent args will be passed to the function f.

id identifies the timer created by setTimeout, and can be used to cancel the timeout.
(do (Thread/sleep 30000)
    (f 42))

Clojure is a hosted language, and relies on host interop for things like this
New implementation...
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programming-idioms.org 
let id = setTimeout(f, 30000, 42);
(do (Thread/sleep 30000)
    (f 42))
Task.Delay(TimeSpan.FromSeconds(30))
    .ContinueWith(_ => f(42));
Future.delayed(const Duration(seconds: 30), () => f(42));
timer := time.AfterFunc(
	30*time.Second,
	func() {
		f(42)
	})
go func() {
	time.Sleep(30 * time.Second)
	f(42)
}()
sleep(30*1000)
f(42)
ScheduledExecutorService executorService = Executors.newSingleThreadScheduledExecutor();
executorService.schedule(() -> _f(42), delayInSeconds, TimeUnit.SECONDS);
Thread t = new Thread(() -> {
    try {
        sleep(30_000);
        f(42);
    } catch (InterruptedException e) {
        throw new RuntimeException(e);
    }
});
t.start();
sleep(30);
f(42);
my $thr = threads->create(sub { sleep(30); f(42); });
$thr->join()
my $thr = threads->create(sub { sleep(30); f(42); });
$thr->detach();
local $SIG{ALRM} = sub { f(42) };
alarm 30;
timer = threading.Timer(30.0, f, args=(42,) ) 
timer.start() 

Thread.new do
  sleep 30
  f(42)
end

sleep(Duration::new(30, 0));
f(42);

(f future: 30 "seconds" * 1000) value: 42.