Convert seconds to hours:minutes:seconds


#1

hello!
i am trying to convert a number of seconds to a nicely formatted string
like this:

7683 seconds = 02:08:03

is there an easy way to accomplish this?


#2

On 12/14/05, `p a@o.e wrote:

hello!
i am trying to convert a number of seconds to a nicely formatted string
like this:

7683 seconds = 02:08:03

Well, assuming you know how to arithmetic, conversions, and string
concatenation (and if not, check out http://pine.fm/LearnToProgram/),
all you’re missing is how to pad with zeroes.

I do talk about the rjust method, but not that you can use it to pad
with things other than spaces:

2.to_s.rjust(5,‘0’)

This pads the string ‘2’ (from 2.to_s) with the string ‘0’.

Another, fancier (or just more complicated? :slight_smile: way:

irb(main):001:0> ‘%.5d’ % 2
=> “00002”

Hope that helps,

Chris


#3

As long as you dont go past 24 hours you can use the Time class:

irb(main):016:0> Time.at(7683).gmtime.strftime(’%R:%S’)
=> “02:08:03”

If you dont use gmtime, it will go based off your localtime, where the
epoch = the offset from GMT.

also by doing the arithmatic:
irb(main):023:0> time = 7683
=> 7683
irb(main):024:0> hours = time/3600.to_i
=> 2
irb(main):025:0> minutes = (time/60 - hours * 60).to_i
=> 8
irb(main):026:0> seconds = (time - (minutes * 60 + hours * 3600))
=> 3
irb(main):030:0> printf("%02d:%02d:%02d\n", hours, minutes, seconds)
02:08:03
=> nil

HTH

  • Andy D.

#4

On Wednesday 14 December 2005 05:21 am, Andy D. wrote:

As long as you dont go past 24 hours you can use the Time class:

irb(main):016:0> Time.at(7683).gmtime.strftime(’%R:%S’)
=> “02:08:03”

Next question: How do I get the number of seconds since Epoch?

SteveT

Steve L.
http://www.troubleshooters.com
removed_email_address@domain.invalid


#5

Steve L. wrote:

On Wednesday 14 December 2005 05:21 am, Andy D. wrote:

As long as you dont go past 24 hours you can use the Time class:

irb(main):016:0> Time.at(7683).gmtime.strftime(’%R:%S’)
=> “02:08:03”

Next question: How do I get the number of seconds since Epoch?

time.to_i
http://www.ruby-doc.org/core/classes/Time.html#M000196


#6

On Wednesday 14 December 2005 08:32 am, `p wrote:

time.to_i
http://www.ruby-doc.org/core/classes/Time.html#M000196

Cool! Thanks!

#!/usr/bin/ruby
b4 = Time.new
sleep(3)
after = Time.new
interval = after.to_i - b4.to_i
print "Started at ", b4.asctime, ", ended at ", after.asctime
print "\n Interval is ", interval.to_s, “.\n”

SteveT

Steve L.
http://www.troubleshooters.com
removed_email_address@domain.invalid


#7

Andy D. wrote:

As long as you dont go past 24 hours you can use the Time class:

irb(main):016:0> Time.at(7683).gmtime.strftime(’%R:%S’)
=> “02:08:03”

hey thanks! that’s what i was looking for.


#8

On Dec 14, 2005, at 8:09 AM, Steve L. wrote:

#!/usr/bin/ruby
b4 = Time.new
sleep(3)
after = Time.new
interval = after.to_i - b4.to_i

You can just subtract normally. Time knows what to do:

interval = after - b4

print "Started at ", b4.asctime, ", ended at ", after.asctime
print "\n Interval is ", interval.to_s, “.\n”

It’s a good idea to get into the habit of using interpolation with
Ruby. That let’s Ruby take care of stringifying your values. We can
also lose those \n characters:

puts “Started at #{b4} and ended at #{after}.”
puts “Interval is #{interval}.”

James Edward G. II


#9

On Wednesday 14 December 2005 09:21 am, James Edward G. II wrote:

print "Started at ", b4.asctime, ", ended at ", after.asctime
print "\n Interval is ", interval.to_s, “.\n”

It’s a good idea to get into the habit of using interpolation
with Ruby. That let’s Ruby take care of stringifying your
values. We can also lose those \n characters:

puts “Started at #{b4} and ended at #{after}.”
puts “Interval is #{interval}.”

Confirmed! That’s much cleaner. I’ve been looking for something like
that, and didn’t want to kill a kitten by using printf() :slight_smile:

Thanks

SteveT

Steve L.
http://www.troubleshooters.com
removed_email_address@domain.invalid


#10

James Edward G. II wrote:

It’s a good idea to get into the habit of using interpolation with
Ruby. That let’s Ruby take care of stringifying your values. We can
also lose those \n characters:

puts “Started at #{b4} and ended at #{after}.”
puts “Interval is #{interval}.”

It’s also faster. Or at least, it was on my system when I ran some
benchmarks.

mathew