Rails——获取小时、分钟和秒的时差

I'm looking for an idiomatic way to get the time passed since a given date in hours, minutes and seconds.

我在寻找一种惯用的方式，以小时、分钟和秒为单位来计算约会结束后的时间。

If the given date is 2013-10-25 23:55:00 and the current date is 2013-10-27 20:55:09, the returning value should be 45:03:09. The time_difference and time_diff gems won't work with this requirement.

如果给定的日期是2013-10-25 23:55:00，当前日期是2013-10-27 20:55:09，返回值应为45:03:09。time_difference和time_diff gem不能使用这个需求。

4 个解决方案

#1

You can try with this:

你可以试试这个:

def time_diff(start_time, end_time)
  seconds_diff = (start_time - end_time).to_i.abs

  hours = seconds_diff / 3600
  seconds_diff -= hours * 3600

  minutes = seconds_diff / 60
  seconds_diff -= minutes * 60

  seconds = seconds_diff

  "#{hours.to_s.rjust(2, '0')}:#{minutes.to_s.rjust(2, '0')}:#{seconds.to_s.rjust(2, '0')}"
  # or, as hagello suggested in the comments:
  # '%02d:%02d:%02d' % [hours, minutes, seconds]
end

And use it:

并使用它:

time_diff(Time.now, Time.now-2.days-3.hours-4.minutes-5.seconds)
# => "51:04:04"

#2

time_diff = Time.now - 2.minutes.ago
Time.at(time_diff.to_i.abs).utc.strftime "%H:%M:%S"
=> "00:01:59"

Or if your app is picky about rounding, just replace to_i to round:

或者，如果你的应用程序对四舍五入很挑剔，只需将to_i替换为round:

  Time.at(time_diff.round.abs).utc.strftime "%H:%M:%S"
   => => "00:02:00"

Not sure about the idiomatic part though

但不确定习惯部分

Update: If time difference is expected to be more than 24 hours then the above code is not correct. If such is the case, one could follow the answer of @MrYoshiji or adjust above solution to calculate hours from a datetime object manually:

更新:如果预期时差超过24小时，则上述代码不正确。如果是这样，你可以按照@MrYoshiji的答案，或者调整上面的解决方案，从datetime对象手工计算小时数:

def test_time time_diff
  time_diff = time_diff.round.abs
  hours = time_diff / 3600

  dt = DateTime.strptime(time_diff.to_s, '%s').utc
  "#{hours}:#{dt.strftime "%M:%S"}"
end

test_time Time.now - 28.hours.ago - 2.minutes - 12.seconds
=> "27:57:48" 
test_time Time.now - 8.hours.ago - 2.minutes - 12.seconds
=> "7:57:48" 
test_time Time.now - 24.hours.ago - 2.minutes - 12.seconds
=> "23:57:48" 
test_time Time.now - 25.hours.ago - 2.minutes - 12.seconds
=> "24:57:48"

#3

There's a method for that:

对此有一个方法:

Time.now.minus_with_coercion(10.seconds.ago)

Time.now.minus_with_coercion(10. seconds.ago)

equals 10 (in fact, 9.99..., use .round if you want a 10).

等于10(事实上，9.99……)如果你想要一个10)的圆。

Source: http://apidock.com/rails/Time/minus_with_coercion

来源:http://apidock.com/rails/Time/minus_with_coercion

Hope I helped.

希望我帮助。

#4

Look at

看看

how to convert 270921sec into days + hours + minutes + sec ? (ruby)

如何将270921秒转换成天+小时+分钟+秒?(ruby)

which is very similar to your question, just starting from the difference in seconds

这和你的问题很相似，只是从秒数的差开始

#1