feed_controller.rb

#starting at line 243
def feeds_into_timescales(feeds)
    # convert timescale (minutes) into seconds
    seconds = params[:timescale].to_i * 60
    # get floored time ranges
    logger.info "Original Start time is " + feeds.first.created_at.to_s
    logger.info "Original End time is " + feeds.last.created_at.to_s
    start_time = get_floored_time(feeds.first.created_at, seconds)
    end_time = get_floored_time(feeds.last.created_at, seconds)
    logger.info "start_time = " + start_time.to_s + " & end_time is " + end_time.to_s
    logger.info "if start_time is greater than end_time, an error will occur"
    # create empty array with appropriate size
    timeslices = Array.new(((end_time - start_time) / seconds).floor)

    # create a blank clone of the first feed so that we only get the necessary attributes
    empty_feed = create_empty_clone(feeds.first)

    # add feeds to array
    feeds.each do |f|
      i = ((f.created_at - start_time) / seconds).floor
      f.created_at = start_time + i * seconds
      timeslices[i] = f if timeslices[i].nil?
    end

gistfile1.txt

Original Start time is 2012-01-25 15:11:08 UTC
Original End time is 2012-01-25 15:00:33 UTC
start_time = 2012-01-25 15:10:00 UTC & end_time is 2012-01-25 15:00:00 UTC
if start_time is greater than end_time, an error will occur
Completed   in 169ms

ArgumentError (negative array size):
  app/controllers/feed_controller.rb:254:in `initialize'
  app/controllers/feed_controller.rb:254:in `new'
  app/controllers/feed_controller.rb:254:in `feeds_into_timescales'
  app/controllers/feed_controller.rb:39:in `index'

Rendered /Users/gakins/.rvm/gems/ruby-1.9.2-p290@rails309/gems/actionpack-3.0.4/lib/action_dispatch/middleware/templates/rescues/_trace.erb (1.1ms)
Rendered /Users/gakins/.rvm/gems/ruby-1.9.2-p290@rails309/gems/actionpack-3.0.4/lib/action_dispatch/middleware/templates/rescues/_request_and_response.erb (6.5ms)
Rendered /Users/gakins/.rvm/gems/ruby-1.9.2-p290@rails309/gems/actionpack-3.0.4/lib/action_dispatch/middleware/templates/rescues/diagnostics.erb within rescues/layout (12.6ms)

log

Original Start time is 2012-01-25 15:11:08 UTC
Original End time is 2012-01-25 15:00:33 UTC
start_time = 2012-01-25 15:10:00 UTC & end_time is 2012-01-25 15:00:00 UTC
if start_time is greater than end_time, an error will occur
Completed   in 169ms

ArgumentError (negative array size):
  app/controllers/feed_controller.rb:254:in `initialize'
  app/controllers/feed_controller.rb:254:in `new'
  app/controllers/feed_controller.rb:254:in `feeds_into_timescales'
  app/controllers/feed_controller.rb:39:in `index'

Rendered /Users/gakins/.rvm/gems/ruby-1.9.2-p290@rails309/gems/actionpack-3.0.4/lib/action_dispatch/middleware/templates/rescues/_trace.erb (1.1ms)
Rendered /Users/gakins/.rvm/gems/ruby-1.9.2-p290@rails309/gems/actionpack-3.0.4/lib/action_dispatch/middleware/templates/rescues/_request_and_response.erb (6.5ms)
Rendered /Users/gakins/.rvm/gems/ruby-1.9.2-p290@rails309/gems/actionpack-3.0.4/lib/action_dispatch/middleware/templates/rescues/diagnostics.erb within rescues/layout (12.6ms)