Convert duration to hours:minutes:seconds (or similar) in Rails 3 or Ruby

Question

I have a feeling there is a simple/built-in way to do this but I can\'t find it.

I have a duration (in seconds) in an integer and I want to display it in a friendly form

Answer 1

Using Time.utc.strftime works only for values when total number of hours is less then 24:

2.2.2 :004 > Time.at(60 * 60).utc.strftime('%H h %M m')
=> "01 h 00 m"

For greater values it returns incorrect results:

2.2.2 :006 > Time.at(60 * 60 * 24).utc.strftime('%H h %M m')
 => "00 h 00 m"

I suggest using the simplest method I found for this problem:

  def formatted_duration total_seconds
    hours = total_seconds / (60 * 60)
    minutes = (total_seconds / 60) % 60
    seconds = total_seconds % 60
    "#{ hours } h #{ minutes } m #{ seconds } s"
  end

You can always adjust returned value to your needs.