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Idiom #185 Execute function in 30 seconds

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

import java.util.concurrent.Executors;
import java.util.concurrent.ScheduledExecutorService;
import java.util.concurrent.TimeUnit;
ScheduledExecutorService executorService = Executors.newSingleThreadScheduledExecutor();
executorService.schedule(() -> _f(42), delayInSeconds, TimeUnit.SECONDS);
(do (Thread/sleep 30000)
    (f 42))
using System;
using System.Threading.Tasks;
Task.Delay(TimeSpan.FromSeconds(30))
    .ContinueWith(_ => f(42));
import "time"
timer := time.AfterFunc(
	30*time.Second,
	func() {
		f(42)
	})
import "time"
go func() {
	time.Sleep(30 * time.Second)
	f(42)
}()
sleep(30*1000)
f(42)
let id = setTimeout(f, 30000, 42);
sleep(30);
f(42);
local $SIG{ALRM} = sub { f(42) };
alarm 30;
use threads;

my $thr = threads->create(sub { sleep(30); f(42); });
$thr->detach();
use threads;
my $thr = threads->create(sub { sleep(30); f(42); });
$thr->join()
import threading
timer = threading.Timer(30.0, f, args=(42,) ) 
timer.start() 

Thread.new do
  sleep 30
  f(42)
end

use std::time::Duration;
use std::thread::sleep;
sleep(Duration::new(30, 0));
f(42);
New implementation...
programming-idioms.org 
ScheduledExecutorService executorService = Executors.newSingleThreadScheduledExecutor();
executorService.schedule(() -> _f(42), delayInSeconds, TimeUnit.SECONDS);
(do (Thread/sleep 30000)
    (f 42))
Task.Delay(TimeSpan.FromSeconds(30))
    .ContinueWith(_ => 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)
let id = setTimeout(f, 30000, 42);
sleep(30);
f(42);
local $SIG{ALRM} = sub { f(42) };
alarm 30;
my $thr = threads->create(sub { sleep(30); f(42); });
$thr->detach();
my $thr = threads->create(sub { sleep(30); f(42); });
$thr->join()
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);