How do to print two zero's 00 as an integer?

Question

I\'m working on some app academy practice questions and I can\'t seem to print two 00\'s for my time conversion. Here\'s what I have so far:

def time_convers         


        

Answer 1

replace last statement of time_conversion with return "%02d:%02d" % [ hours, minutes ]

Check the document http://ruby-doc.org/core-2.1.5/String.html#method-i-25 for more details

Answer 2

The method Fixnum#divmod is useful here:

def time_conversion(minutes)
  "%d hours: %02d minutes" % minutes.divmod(60)
end      

time_conversion(360)
  #=> "6 hours: 00 minutes"

Answer 3

You can use sprintf:

sprintf("%02d:%02d", hours, minutes)

or the equivalent String#%

"%02d:%02d" % [hours, minutes]

Answer 4

A very simple re-structuring of your code could be with one single line in your function def -

return "#{m/60}:#{m%60 == 0 ? '00' : m%60}"

Sample execution from irb -

2.1.5 :077 > m=100
 => 100 
2.1.5 :078 > puts "#{m/60}:#{m%60 == 0 ? '00' : m%60}"
1:40
 => nil 
2.1.5 :079 > m=120
 => 120 
2.1.5 :080 > puts "#{m/60}:#{m%60 == 0 ? '00' : m%60}"
2:00
 => nil 
2.1.5 :081 >