time

问题 I want to measure the speed of a function within a loop. But why my way of doing it always print "0" instead of high-res timing with 9 digits decimal precision (i.e. in nano/micro seconds)? What's the correct way to do it? #include <iomanip> #include <iostream> #include <time.h> int main() { for (int i = 0; i <100; i++) { std::clock_t startTime = std::clock(); // a very fast function in the middle cout << "Time: " << setprecision(9) << (clock() - startTime + 0.00)/CLOCKS_PER_SEC << endl; }

问题 I would like to know how properly get amount of days in each year quarter. With take in to the account leap year. For example: 1 quarter : 90 (or 91 Leap year) 2 quarter : 91 -current quarter 3 quarter : 92 4 quarter : 92 From the docs it is possible to understand that we should divide year 12 into 4 parts. Then get amount of day of each quarter like 3 * (amount of days in 3 months). But how it is could be done in more sophisticated way and without of the hardcode. 回答1: You should use

问题 I have three data types in my database. Datetime, timestamp, and time. I get the time using the date function and tried to insert it into the database under all three columns, but all three columns rejected the A.M, P.M part of the date function. I don't understand why. I need the A.M, P.M part of the date function to be also inserted, so I can sort the data in my database more efficiently by time. Is there another column that can store the A.M, P.M part of the date, or is there a workaround

问题 i have a table in sql server 2012, with one of its column having the following data in time datatype, How would you convert 00:45:00 to 0.45 or 01:45:00 to 1.45 ? please help. 回答1: From the question, it seems you only want to remove the ':' with '.'. If so, it can be achieved in many ways in sql server 2012. One example is below. If your column is 'Datetime', use this: SELECT REPLACE(LEFT(CAST(DatetimeCol AS TIME),5),':',',') FROM Tbl Else if it just 'Time' then remove the casting. 回答2: You

问题 i have a table in sql server 2012, with one of its column having the following data in time datatype, How would you convert 00:45:00 to 0.45 or 01:45:00 to 1.45 ? please help. 回答1: From the question, it seems you only want to remove the ':' with '.'. If so, it can be achieved in many ways in sql server 2012. One example is below. If your column is 'Datetime', use this: SELECT REPLACE(LEFT(CAST(DatetimeCol AS TIME),5),':',',') FROM Tbl Else if it just 'Time' then remove the casting. 回答2: You

问题 i have a table in sql server 2012, with one of its column having the following data in time datatype, How would you convert 00:45:00 to 0.45 or 01:45:00 to 1.45 ? please help. 回答1: From the question, it seems you only want to remove the ':' with '.'. If so, it can be achieved in many ways in sql server 2012. One example is below. If your column is 'Datetime', use this: SELECT REPLACE(LEFT(CAST(DatetimeCol AS TIME),5),':',',') FROM Tbl Else if it just 'Time' then remove the casting. 回答2: You

问题 I have managed to read the web service to get current time of any given city. I could get 2 important values from web service, current time (String) and the offset. Question is How to set time of any given city correctly? Option 1: Read machine/local time Calculate UTC/GMT time out of machine time City time = UTC time +/- offset value But then what happens when machine time is wrong? You will also got wrong time right? Option 2: Read current city time in String (2012-11-24 19:30) Parse this

问题 A separate question for the AIML bot in my previous post... How do you create a bot that responds at different times of the day? I feel like it will make him seem more "real." I can't make heads or tails about how the date and time display actually works. I assume you'd have to fiddle with that alongside the set/get functions... but that's all I know for sure. I would like my bot to do something like this. TIME: Noon USER: Hi, bot. BOT: Good afternoon, USER! It's about lunchtime for me. Where

问题 I'm trying to work out how to the the correct Site base on the current Day and Time from an array. The examples array just shows Monday, the real array will contain 7 days of the week with multiple values for each day. This is the example array : $arr = array ( array( 'Day' => 'Monday', 'Start' => '0830', 'End' => '1730', 'Site' => 'NW1'), array( 'Day' => 'Monday', 'Start' => '1200', 'End' => '1300', 'Site' => 'PL1'), array( 'Day' => 'Monday', 'Start' =>'1730', 'End' => '2130', 'Site' => 'RE1

问题 self.date = QtCore.QDate.currentDate() self.time = QtCore.QTime.currentTime() self.updateTime = QtCore.QString(self.time.toString("hh:mm:ss AP")) if ((self.time.second() % 2) == 0): self.updateTime[2]= ' ' self.label.setText(self.updateTime) Error: TypeError: file line 54: 'QString' object does not support item assignment iam getting this error in if loop, is there any solution? iam new to python any help appreciated.... thank you 回答1: Your problem is that you cannot change the the QString by