Convert Hour:Minute:Second (Hh:Mm:Ss) String to Proper Time Class

Convert hour:minute:second (HH:MM:SS) string to proper time class

Use the function chron in package chron:

time<-c("00:00:01", "01:02:00", "09:30:01", "14:15:25")

library(chron)
x <- chron(times=time)

x
[1] 00:00:01 01:02:00 09:30:01 14:15:25

Do some useful things, like calculating the difference between successive elements:

diff(x)
[1] 01:01:59 08:28:01 04:45:24

chron objects store the values internally as a fraction of seconds per day. Thus 1 second is equivalent to 1/(60*60*24), or 1/86400, i.e. 1.157407e-05.

So, to add times, one simple option is this:

x + 1/86400
[1] 00:00:02 01:02:01 09:30:02 14:15:26

Convert strings to time format so I can calculate the difference

We can take the difference after converting to ITime

library(dplyr)
library(data.table)
df2 <- df1 %>%
     mutate(difference = as.ITime(time_2) - as.ITime(time_1))

or to get the difference in minutes

df1 %>% 
    mutate(difference = difftime(as.ITime(time_1),
      as.ITime(time_2), units = 'min'))

Converting HH:MM:SS string in .csv to HH:MM:SS vector in R using hms()

Use parse_hms() rather than as_hms()

How to convert an H:MM:SS time string to seconds in Python?

def get_sec(time_str):
    """Get seconds from time."""
    h, m, s = time_str.split(':')
    return int(h) * 3600 + int(m) * 60 + int(s)


print(get_sec('1:23:45'))
print(get_sec('0:04:15'))
print(get_sec('0:00:25'))

Converting character to time in R

We can use times from chron to convert to time

library(chron)
times(v1)
#[1] 00:30:00
chron(times(v1))
#[1] (01/01/70 00:30:00)

Or use strptime to convert to date time objects

r1 <- strptime(v1, format = "%H:%M:%S")
r1
#[1] "2016-05-10 00:30:00 IST"

In addition to strptime, POSIXct is also possible

r2 <- as.POSIXct(v1, format = "%H:%M:%S")
r2
#[1] "2016-05-10 00:30:00 IST"

The difference between strptime and POSIXct is that the former has POSIXlt class whereas the latter have only POSIXct. Also, if we look at the structure of both, the strptime is stored as a list

is.list(r1)
#[1] TRUE
is.list(r2)
#[1] FALSE
lapply(r1, I)
r1$min
#[1] 30

Another option is lubridate

library(lubridate)
hms(v1)
#[1] "30M 0S"

This also have the date i.e. current date.

The as.Date only converts to 'Date'. It doesn't show any time.

data

v1 <- "0:30:00"

Individually available Hour Minute Seconds to HH:mm:ss format

Something like this:

String.format("%02d:%02d:%02d", e.getHours(), e.getMinutes(), e.getSeconds())

JavaScript seconds to time string with format hh:mm:ss

String.prototype.toHHMMSS = function () {
    var sec_num = parseInt(this, 10); // don't forget the second param
    var hours   = Math.floor(sec_num / 3600);
    var minutes = Math.floor((sec_num - (hours * 3600)) / 60);
    var seconds = sec_num - (hours * 3600) - (minutes * 60);

    if (hours   < 10) {hours   = "0"+hours;}
    if (minutes < 10) {minutes = "0"+minutes;}
    if (seconds < 10) {seconds = "0"+seconds;}
    return hours+':'+minutes+':'+seconds;
}

You can use it now like:

alert("5678".toHHMMSS());

Working snippet:

String.prototype.toHHMMSS = function () {    var sec_num = parseInt(this, 10); // don't forget the second param    var hours   = Math.floor(sec_num / 3600);    var minutes = Math.floor((sec_num - (hours * 3600)) / 60);    var seconds = sec_num - (hours * 3600) - (minutes * 60);
    if (hours   < 10) {hours   = "0"+hours;}    if (minutes < 10) {minutes = "0"+minutes;}    if (seconds < 10) {seconds = "0"+seconds;}    return hours + ':' + minutes + ':' + seconds;}    console.log("5678".toHHMMSS());

String _printDuration(Duration duration) {
  String twoDigits(int n) => n.toString().padLeft(2, "0");
  String twoDigitMinutes = twoDigits(duration.inMinutes.remainder(60));
  String twoDigitSeconds = twoDigits(duration.inSeconds.remainder(60));
  return "${twoDigits(duration.inHours)}:$twoDigitMinutes:$twoDigitSeconds";
}

final now = Duration(seconds: 30);
print("${_printDuration(now)}");