clock

问题 This question already has answers here : How do I time a method's execution in Java? (38 answers) Closed last year . What's a simple/easy way to access the system clock using Java, so that I can calculate the elapsed time of an event? 回答1: I would avoid using System.currentTimeMillis() for measuring elapsed time. currentTimeMillis() returns the 'wall-clock' time, which may change (eg: daylight savings, admin user changing the clock) and skew your interval measurements. System.nanoTime(), on

问题 This question already has answers here : How do I time a method's execution in Java? (38 answers) Closed last year . What's a simple/easy way to access the system clock using Java, so that I can calculate the elapsed time of an event? 回答1: I would avoid using System.currentTimeMillis() for measuring elapsed time. currentTimeMillis() returns the 'wall-clock' time, which may change (eg: daylight savings, admin user changing the clock) and skew your interval measurements. System.nanoTime(), on

问题 I want to log how long something takes in real walltime. Currently I'm doing this: startTime = time.time() someSQLOrSomething() print "That took %.3f seconds" % (time.time() - startTime) But that will fail (produce incorrect results) if the time is adjusted while the SQL query (or whatever it is) is running. I don't want to just benchmark it. I want to log it in a live application in order to see trends on a live system. I want something like clock_gettime(CLOCK_MONOTONIC,...), but in Python.

问题 I have a simple quiz application and I want display a nice timer / clock at the top of the page which shows the user how long they've been going for. (If I could somehow show them a timer for Total Quiz Time and also a second one for This Question Time that would be even cooler but I should be able to figure out how to do myself that once I've got one timer working. My question is: What's a nice, easy way to show a simple timer / clock using JQuery? (straight JS is also ok) I know how to

问题 I'm creating a kid's game with a timer countdown that starts after the user clicks a button. The code I'm using initiates the countdown without a problem, but I'd like the countdown to start only after the button is clicked. Here is my code: window.onload = function(){ (function(){ var counter = 5; setInterval(function() { counter--; if (counter >= 0) { span = document.getElementById("count"); span.innerHTML = counter; } if (counter === 0) { alert('sorry, out of time'); clearInterval(counter)

问题 I'm trying to make my background change during the day depending on the time, tried 4 different methods and searched here, but still can't figure it out. Can anybody tell me what i'm doing wrong? Thanks in advance! $(document).ready(function(){ var d = new Date(); var n = d.getHours(); if (n > 6 || n < 10) $(body).addClass('two'); else if (n > 10 && n < 17) $(body).addClass('one'); else if (n > 17 && n <= 19) $(body).addClass('three'); else $(body).addClass('five'); }); CSS .one{ background

问题 Take this function getting time as a double using clock_gettime: // return current time in milliseconds static double time_get_ms(void) { struct timespec res; #ifdef ANDROID clock_gettime(CLOCK_REALTIME_HR, &res); #else clock_gettime(CLOCK_REALTIME, &res); #endif return (double)(1000.0*res.tv_sec + res.tv_nsec/1e6); } Sending it to a shader requires conversion to float. The mantissa is being overflowed and is truncated on the way to the shader. Example: As a double = 1330579093642.441895 As a

问题 I want to show the current time on a website I am making for class, but I cannot find a way to do so. Is their a way to show real time in code? and if so, how do you do it? 回答1: You can accomplish this fairly easily by first creating an element: <span id="clock"></span> And then getting a reference to that element: var clockElement = document.getElementById( "clock" ); Next we'll need a function that will update the contents with the time: function updateClock ( clock ) { clock.innerHTML =

问题 I have a question. If my alarmS == 60 i need to switch inc alarmM and reset the alarmS but I have a question increment_alarm_second: inc alarmS ; increment alarmS cpi alarmS , 0x5A ; 0x3C ; Compare alarmS to 60 breq increment_alarm_minute ; If true, jump incMinute swap alarmS ; swap here to save registers ( swap nibbles ) cpi alarmS , 0xA0 ; compares alarmS register to an inverted 10 brlo endIncSecal ; branch if lower then an inverted 10 to endIncSecal incSecTenal: andi alarmS, 0x0F ; does an

问题 I am trying to make an alarm clock for a final project in one of my classes. I am using push buttons on a DE1 Altera board to manually increment hours and mins. The mins work but I can not get the hours to increment manually. All pin assignments are correct. library ieee; use ieee.std_logic_1164.all; use ieee.std_logic_arith.all; use ieee.std_logic_unsigned.all; entity ClkMain is port ( clk,pb_hr,pb_min,clk_set,almr_enbl: in std_logic; almr_hr: in integer range 0 to 23; almr_min: in integer