Convert Duration to Hours:Minutes:Seconds (Or Similar) in Rails 3 or Ruby

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

See: http://api.rubyonrails.org/classes/ActionView/Helpers/DateHelper.html

distance_of_time_in_words(3600)
 => "about 1 hour"

Rails - Get the time difference in hours, minutes and seconds

You can try with this:

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:

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

Rails - Convert hours and minutes to seconds then assign value to key

First, you can remove the hidden time_duration field from the form, since it is not needed.

Then, you'll create a before_save method for your car model:

car.rb

class Car < ActiveRecord::Base
  belongs_to :service
  belongs_to :tech
  has_many :appointments 

  before_save :generate_time_duration

  def generate_time_duration
    self[:time_duration] = hours.hours.to_i + minutes.minutes.to_i
  end
end

What this does: Before the car object is saved, it will run the generate_time_duration method. What this method does is it simply sums the hours.to_i and minutes.to_i and assigns it to the car's time_duration attribute.

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Update old DB records

Since you're adding this functionality in your application AFTER records have already been created, here is a quick way to update all of your current records:

1. In your command line, open a rails console by running the command rails c (or rails console)
2. In the console, run this command: Car.all.each { |c| c.save! }

This is a quick, one-time fix that will loop through all Car records, save them, and subsequently update their time_duration fields.

Dividing seconds into hours, minutes and seconds

You could do it like this:

seconds = 219

hours = seconds / 3600
seconds -= hours * 3600

minutes = seconds / 60
seconds -= minutes * 60

puts "#{hours} hours, #{minutes} minutes and #{seconds} seconds"

Convert duration in seconds to hours and minutes and skip empty values

Why not just something simple like this:

def to_hms(time)
  hours = time / 3600
  minutes = (time / 60) % 60

  if (hours > 0 and minutes > 0)
    '%d h %d m' % [ hours, minutes ]
  elsif (hours > 0)
    '%d h' % hours
  elsif (minutes > 0)
    '%d m' % minutes
  end
end

Where this produces the desired results:

to_hms(63000)
# => "17 h 30 m"
to_hms(28800)
# => "8 h"
to_hms(1800)
# => "30 m"

Converting hours, minutes and seconds to seconds in ruby

'12:34:56'.split(':').map(&:to_i).inject(0) { |a, b| a * 60 + b }
=> 45296

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

It can be done pretty concisely using divmod:

t = 270921
mm, ss = t.divmod(60)            #=> [4515, 21]
hh, mm = mm.divmod(60)           #=> [75, 15]
dd, hh = hh.divmod(24)           #=> [3, 3]
puts "%d days, %d hours, %d minutes and %d seconds" % [dd, hh, mm, ss]
#=> 3 days, 3 hours, 15 minutes and 21 seconds

You could probably DRY it further by getting creative with collect, or maybe inject, but when the core logic is three lines it may be overkill.

Converting seconds into hours only using Ruby in-built function - except the days

Now that I see what you're looking for, I offer this:

def seconds_to_hms(sec)
  [sec / 3600, sec / 60 % 60, sec % 60].map{|t| t.to_s.rjust(2,'0')}.join(':')
end

Edit: Another option, even more concise:

def seconds_to_hms(sec)
  "%02d:%02d:%02d" % [sec / 3600, sec / 60 % 60, sec % 60]
end

Sample output;

seconds_to_hms(164580)
=> "45:43:00"

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