Reordering pages in a PDF document in Ruby

To reorder pages in a PDF document by reversing the order of pages.

Given the copy and delete page operations described in other sections, it is easy to re-arrange and sort pages.

doc = PDFDoc.new(filename)

page_num = doc.GetPageCount()
for i in 1..page_num do
  itr = doc.GetPageIterator(i)
  page = itr.Current()
  doc.PageRemove(itr)
  doc.PagePushFront(page)
end

Merge, copy, delete, and rearrange PDF pages
Full code sample which illustrates how to copy pages from one document to another, how to delete, and rearrange pages and how to use ImportPages().