CODEBOXER.com

So, if you are ever somewhere where they ask you to write code on the wall with dry-erase marker, then you are covered.

Me, I never realized how much I love using a keyboard and watching the letters I type appear on the screen. Writing by hand is for suckers and/or poets.

class Mod
  
  def self.ago(seconds)
    case true
    when seconds.to_i < 60
      s = seconds.to_i
      return "#{s} second#{s>1 ? "s" : ""} ago."
    when seconds.to_i < 3600
      m = seconds.to_i/60
      s = seconds.to_i%60
      return "#{m} minute#{m>1 ? "s" : ""}, #{s} second#{s>1 ? "s" : ""} ago."
    when seconds.to_i < (3600 * 24)
      h = seconds.to_i/3600
      m = (seconds.to_i/60)%60
      s = seconds.to_i%60
      return "#{h} hour#{h>1 ? "s" : ""}, #{m} minute#{m>1 ? "s" : ""}, #{s} second#{s>1 ? "s" : ""} ago."
    else
      d = seconds.to_i / (3600 * 24)
      h = (seconds.to_i/3600)%24
      m = (seconds.to_i/60)%60
      s = seconds.to_i%60
      return "#{d} day#{d>1 ? "s" : ""}, #{h} hour#{h>1 ? "s" : ""}, #{m} minute#{m>1 ? "s" : ""}, #{s} second#{s>1 ? "s" : ""} ago."
    end
  end
  
end

and the tests:

require 'test_helper'

class ModTest < ActiveSupport::TestCase
  test "ago function" do
    assert_equal "1 second ago.", Mod.ago(1)
    assert_equal "40 seconds ago.", Mod.ago(40)
    assert_equal "1 minute, 1 second ago.", Mod.ago(61)
    assert_equal "3 minutes, 1 second ago.", Mod.ago(181)
    assert_equal "2 minutes, 40 seconds ago.", Mod.ago(160)
    assert_equal "1 hour, 3 minutes, 1 second ago.", Mod.ago(3600 + 181)
    assert_equal "2 hours, 3 minutes, 2 seconds ago.", Mod.ago((3600 * 2)+ 182)
    assert_equal "1 day, 0 hour, 1 minute, 1 second ago.", Mod.ago((60*60*24) + 61)
    assert_equal "1 day, 3 hours, 1 minute, 1 second ago.", Mod.ago((60*60*24) + 3600 + 3600 + 3600 + 61)
    assert_equal "2 days, 3 hours, 0 minute, 6 seconds ago.", Mod.ago(((60*60*24)*2) + 3600 + 3600 + 3600 + 6)
  end
end