santoshwadghule.rb

#----------------------------------------------------------
# Ruby Challege : Cycle Tracks 
# Author: Santosh Wadghule
# Website: http://mechanicles.com
#----------------------------------------------------------
def skip_tracks(playlist, i)
  arr = Array.new
  
  if i  > 0 # For forward skip
    i = i % playlist.length
    j = 0
     while j < i do
       arr[j] = playlist[j] 
       j += 1
     end
     playlist = playlist - arr
     playlist = playlist + arr
  end
  
  if i < 0 # For Backword Skip
    i = i.abs % playlist.length
    i = -i
    i = i + playlist.length
    j = 0
    while i <= playlist.length - 1 do
      arr[j] = playlist[i]
       j += 1
       i += 1
    end
    playlist = playlist - arr
    playlist = arr + playlist
  end
    playlist
end

playlist = ["New York, New York", "When You're Drinkin", "Fly Me To The Moon", "Delhi 6", "Jai Ho","Mac The Knife"]
flag = true

while flag
  puts "---Current Track List---"
  print"> "
  puts playlist
  puts "------------------------"
  puts
  puts "Enter the number to skip songs"
  n = gets.to_i
  playlist = skip_tracks(playlist,n)
  puts
  puts"---After Track List-----"
  print"> "
  puts playlist
  puts "------------------------"
  puts
  puts "Change the Song? type 'y | yes' or 'n | no'"
  status = gets
  
  if status.chomp == 'y' or status.chomp == 'yes' 
    flag = true
  else
    flag = false
  end    
end