timing

问题 By the document, "onPause" is called, when: when the system is about to start resuming a previous activity. Compared to "onStop", the difference is: Called when the activity is no longer visible to the user, because another activity has been resumed and is covering this one. But when I long-press HW-Home key and the "recent apps" shows up, the "onPause" is not called. At this moment, I can no long able to interact with the original activity, but it is still visible. I am confused by this

问题 I think my program is skipping result of JSON call. Is it possible to make a closure function here or make the program wait for JSON call to return? function username_not_duplicate(username) { var function_name = "get_username"; var parameters = [username]; var url = "/get_functions.php?function_name=" + function_name + "&parameters=" + parameters; $.getJSON(url, function(user_name) { if (user_name == true) { return true; } }); return false; } 回答1: The $.getJSON() API call is asynchronous.

问题 I think my program is skipping result of JSON call. Is it possible to make a closure function here or make the program wait for JSON call to return? function username_not_duplicate(username) { var function_name = "get_username"; var parameters = [username]; var url = "/get_functions.php?function_name=" + function_name + "&parameters=" + parameters; $.getJSON(url, function(user_name) { if (user_name == true) { return true; } }); return false; } 回答1: The $.getJSON() API call is asynchronous.

问题 I'm trying to schedule a repeating event to run every minute in Python 3. I've seen class sched.scheduler but I'm wondering if there's another way to do it. I've heard mentions I could use multiple threads for this, which I wouldn't mind doing. I'm basically requesting some JSON and then parsing it; its value changes over time. To use sched.scheduler I have to create a loop to request it to schedule the even to run for one hour: scheduler = sched.scheduler(time.time, time.sleep) # Schedule

问题 Question: Is this a valid way to test the time taken to build a RDD? I am doing two things here. The basic approach is that we have M instances of what we call a DropEvaluation, and N DropResults. We need to compare each N DropResult to each of M DropEvaluations. Each N must be seen by each M, to give us M results in the end. If I don't use the .count() once the RDD is built, the driver continues on to the next line of code and says it look almost no time to build a RDD that takes 30 minutes

问题 When i do traceroute from one solaris m/c to another using 10 gig network interface it takes 0.073 ms for 40 bytes packets. When i do the same thing in java, the time is way longer. It is longer even after 10K iteration. What could be the reason ? Java: Sender (Snippet) Socket sendingSocket = new Socket(address, RECEIVER_PORT); sendingSocket.setTcpNoDelay(true); OutputStream outputStream = sendingSocket.getOutputStream(); byte[] msg = new byte[64]; // assume that it is populated. for (int i =

问题 When i do traceroute from one solaris m/c to another using 10 gig network interface it takes 0.073 ms for 40 bytes packets. When i do the same thing in java, the time is way longer. It is longer even after 10K iteration. What could be the reason ? Java: Sender (Snippet) Socket sendingSocket = new Socket(address, RECEIVER_PORT); sendingSocket.setTcpNoDelay(true); OutputStream outputStream = sendingSocket.getOutputStream(); byte[] msg = new byte[64]; // assume that it is populated. for (int i =

问题 When using MediaPlayer, I noticed that whenever my phone stucks, the MediaPlayer glitches and then continues playing from the position in the audio it glitched. This is bad for my implementation since I want the audio to be played at a specific time. If I have a song of 1000 millisecond length, I want is the ability to set MediaPlayer to start playing at some specific time t , and then exactly stop at at time t+1000 . This means that I actually need two things: 1) Start MediaPlayer at a

问题 I've been working at this for quite some time now. I'm trying to create a simple timer that counts down. I've gotten the alert() to work, but unfortunately the textToChange does not change. I've reproduced a copy of my code below. Any help would be greatly appreciated! Thank you. <script type="text/javascript"> var timeLeft = 0; var changingTextElement; var changingText = new Array(); var ctr = 0; function timeMsg(thing) { var length = thing.inputbox.value*1000; var t = setTimeout("alertMsg()

问题 I've been working at this for quite some time now. I'm trying to create a simple timer that counts down. I've gotten the alert() to work, but unfortunately the textToChange does not change. I've reproduced a copy of my code below. Any help would be greatly appreciated! Thank you. <script type="text/javascript"> var timeLeft = 0; var changingTextElement; var changingText = new Array(); var ctr = 0; function timeMsg(thing) { var length = thing.inputbox.value*1000; var t = setTimeout("alertMsg()