timer interview questions
Top timer frequently asked interview questions
JQuery, how to call a function every 5 seconds.
I'm looking for a way to automate the changing of images in a slideshow.
I'd rather not install any other 3rd party plugins if possible.
Source: (StackOverflow)
Possible Duplicate:
How to measure how long is a function running?
I have an I/O
time taking method which copies data from a location to another. What's the best and most real way of calculating the execution time? Thread
? Timer
? Stopwatch
? Any other solution? I want the most exact one, and briefest as much as possible.
Source: (StackOverflow)
I have been checking out some of the possible timers lately, and the Threading.Timer and Timers.Timer are the ones that look needful to me (since they support thread pooling).
I am making a game, and I plan on using all types of events, with different intervals, etc.
Which would be the best?
Source: (StackOverflow)
I need to find a bottleneck and need to accurately as possible measure time.
Is the following code snippet the best way to measure the performance?
DateTime startTime = DateTime.Now;
// Some execution process
DateTime endTime = DateTime.Now;
TimeSpan totalTimeTaken = endTime.Subtract(startTime);
Source: (StackOverflow)
I have code where I schedule a task using java.util.timer
. I was looking around and saw ExecutorService
can do the same. So this question here, have you used Timer and ExecutorService
to schedule tasks, what is the benefit of one using over another?
Also wanted to check if anyone had used the Timer
class and ran into any issues which the ExecutorService
solved for them.
Source: (StackOverflow)
Can someone get a simple example of updating textfield every second or so?
I want to make a flying ball and need to calculate the ball coordinates every second, that's why I need some sort of timer.
I don't get anything from here.
Source: (StackOverflow)
There are three Timer
classes that I am aware of, System.Threading.Timer
, System.Timers.Timer
, and System.Windows.Forms.Timer
, but none of these have a .Reset()
function which would reset the current elapsed time to 0.
Is there a BCL class that has this functionality? Is there a non-hack way of doing it? (I thought perhaps changing the time limit on it might reset it) Thought on how hard it would be to reimplement a Timer
class that had this functionality, or how to do it reliably with one of the BCL classes?
Source: (StackOverflow)
I want to repeatedly execute a function in Python every 60 seconds forever (just like an NSTimer in Objective C). This code will run as a daemon and is effectively like calling the python script every minute using a cron, but without requiring that to be set up by the user.
In this question about a cron implemented in Python, the solution appears to effectively just sleep() for x seconds. I don't need such advanced functionality so perhaps something like this would work
while True:
# Code executed here
time.sleep(60)
Are there any foreseeable problems with this code?
Source: (StackOverflow)
I'm looking to implement a simple timer mechanism in C++. The code should work in Windows and Linux. The resolution should be as precise as possible (at least millisecond accuracy). This will be used to simply track the passage of time, not to implement any kind of event-driven design. What is the best tool to accomplish this?
Source: (StackOverflow)
I need an accurate timer, and DateTime.Now seems not accurate enough. From the descriptions I read, System.Diagnostics.Stopwatch seems to be exactly what I want.
But I have a phobia. I'm nervous about using anything from System.Diagnostics in actual production code. (I use it extensively for debugging with Asserts and PrintLns etc, but never yet for production stuff.) I'm not merely trying to use a timer to benchmark my functions - my app needs an actual timer. I've read on another forum that System.Diagnostics.StopWatch is only for benchmarking, and shouldn't be used in retail code, though there was no reason given. Is this correct, or am I (and whoever posted that advice) being too closed minded about System.Diagnostics? ie, is it ok to use System.Diagnostics.Stopwatch in production code?
Thanks
Adrian
Source: (StackOverflow)
I've a timer object. I want it to be run every minute. Specifically, it should run a OnCallBack
method and gets inactive while a OnCallBack
method is running. Once a OnCallBack
method finishes, it (a OnCallBack
) restarts a timer.
Here is what I have right now:
private static Timer timer;
private static void Main()
{
timer = new Timer(_ => OnCallBack(), null, 0, 1000 * 10); //every 10 seconds
Console.ReadLine();
}
private static void OnCallBack()
{
timer.Change(Timeout.Infinite, Timeout.Infinite); //stops the timer
Thread.Sleep(3000); //doing some long operation
timer.Change(0, 1000 * 10); //restarts the timer
}
However, it seems to be not working. It runs very fast every 3 second. Even when if raise a period (1000*10). It seems like it turns a blind eye to 1000 * 10
What did I do wrong?
Source: (StackOverflow)
I have written a javascript function that uses setInterval to manipulate a string every tenth of a second for a certain number of iterations.
function timer() {
var section = document.getElementById('txt').value;
var len = section.length;
var rands = new Array();
for (i=0; i<len; i++) {
rands.push(Math.floor(Math.random()*len));
};
var counter = 0
var interval = setInterval(function() {
var letters = section.split('');
for (j=0; j < len; j++) {
if (counter < rands[j]) {
letters[j] = Math.floor(Math.random()*9);
};
};
document.getElementById('txt').value = letters.join('');
counter++
if (counter > rands.max()) {
clearInterval(interval);
}
}, 100);
};
Instead of having the interval set at a specific number, I would like to update it every time it runs, based on a counter. So instead of:
var interval = setInterval(function() { ... }, 100);
It would be something like:
var interval = setInterval(function() { ... }, 10*counter);
Unfortunately, that did not work. It seemed like "10*counter" equals 0.
So, how can I adjust the interval every time the anonymous function runs?
Source: (StackOverflow)
What is the best way to time a code section with high resolution and portability?
/* Time from here */
ProcessIntenseFunction();
/* to here. */
printf("Time taken %d seconds %d milliseconds", sec, msec);
Is there a standard library that would have a cross-platform solution?
Source: (StackOverflow)
How do I call clock()
in C++
?
For example, I want to test how much time a linear search takes to find a given element in an array.
Source: (StackOverflow)