epoch

问题 Currently I store the time in my database like so: 2010-05-17 19:13:37 However, I need to compare two times, and I feel it would be easier to do if it were a unix timestamp such as 1274119041 . (These two times are different) So how could I convert the timestamp to unix timestamp? Is there a simple php function for it? 回答1: You're looking for strtotime() 回答2: You want strtotime: print strtotime('2010-05-17 19:13:37'); // => 1274123617 回答3: Getting a unixtimestamp: $unixTimestamp = time();

问题 I'm asking to know what to write in my documentation. MDN describes it as: A Number representing the milliseconds elapsed since the UNIX epoch. While W3Schools describes it as: the number of milliseconds since 1970/01/01 However, those are just descriptions . The Wikipedia page of Unix time states: Unix time is a system for describing instants in time, defined as the number of seconds that have elapsed since 00:00:00 Coordinated Universal Time (UTC), Thursday, 1 January 1970 [...] Seconds.

问题 I'm currently having an issue with Python. I have a Pandas DataFrame and one of the columns is a string with a date. The format is : "%Y-%m-%d %H:%m:00.000". For example : "2011-04-24 01:30:00.000" I need to convert the entire column to integers. I tried to run this code, but it is extremely slow and I have a few million rows. for i in range(calls.shape[0]): calls['dateint'][i] = int(time.mktime(time.strptime(calls.DATE[i], "%Y-%m-%d %H:%M:00.000"))) Do you guys know how to convert the whole

问题 I'm using an API right now and it provides an epochTime. I've tried everything to convert this epochtime to date, but it doesn't seem to be working including $epoch_time / 1000 and then using the date() function to convert it. The epoch time looks something like this 1353430853299. Is there a way to do this? strtotime() did not work either. It seems that all of the other readings about epoch time are about changing date to epochtime, but I'm looking to go the other way around. Any help is

问题 I would like to get the current timestamp and print it out using fprintf . 回答1: For 32-bit systems: fprintf(stdout, "%u\n", (unsigned)time(NULL)); For 64-bit systems: fprintf(stdout, "%lu\n", (unsigned long)time(NULL)); 回答2: Is just casting the value returned by time() #include <stdio.h> #include <time.h> int main(void) { printf("Timestamp: %d\n",(int)time(NULL)); return 0; } what you want? $ gcc -Wall -Wextra -pedantic -std=c99 tstamp.c && ./a.out Timestamp: 1343846167 To get microseconds

问题 I want to convert a given time into epoch(time_t) and vice versa. can anyone tell what is the routine or algorithm for this? Thanks Update epoch_strt.tm_sec = 0; epoch_strt.tm_min = 0; epoch_strt.tm_hour = 0; epoch_strt.tm_mday = 1; epoch_strt.tm_mon = 1; epoch_strt.tm_year = 70; epoch_strt.tm_isdst = -1; double nsecs = difftime(curtime, basetime);//current time from system, I converrting it to struct tm but this always return 32399 for some reason. 回答1: You should cast it to a long int

问题 I was able to find example code to get the current timestamp in Linux Epoch (Seconds since Midnight Jan 1st 1970), however I am having trouble finding an example as to how to calculate what the Epoch will be in the future, say for example 10 minutes from now, so how can I calculate a future time in Linux Epoch? 回答1: This extension method should do the job: private static double GetUnixEpoch(this DateTime dateTime) { var unixTime = dateTime.ToUniversalTime() - new DateTime(1970, 1, 1, 0, 0, 0,

问题 so I give up...been trying to do this all day; I have a string that supplies a date and time in the format dd/MM/yyyy hh:mm ( 04/12/2012 07:00 ). I need to turn that into an Epoch date so I can do some calculations upon it. I cannot modify the format in which the date time is sent to me. JavaScript or jQuery is fine. 回答1: JavaScript dates are internally stored as milliseconds since epoch. You just need to convert it to a number, e.g. with the unary + operator, to get them. Or you can use the

问题 so I give up...been trying to do this all day; I have a string that supplies a date and time in the format dd/MM/yyyy hh:mm ( 04/12/2012 07:00 ). I need to turn that into an Epoch date so I can do some calculations upon it. I cannot modify the format in which the date time is sent to me. JavaScript or jQuery is fine. 回答1: JavaScript dates are internally stored as milliseconds since epoch. You just need to convert it to a number, e.g. with the unary + operator, to get them. Or you can use the

问题 Why is 1 January 1970 00:00:00 considered the epoch time ? 回答1: Early versions of unix measured system time in 1/60 s intervals. This meant that a 32-bit unsigned integer could only represent a span of time less than 829 days. For this reason, the time represented by the number 0 (called the epoch ) had to be set in the very recent past. As this was in the early 1970s, the epoch was set to 1971-1-1. Later, the system time was changed to increment every second, which increased the span of time