Class: File

Inherits:
Object
  • Object
show all
Defined in:
lib/twitter_backup.rb

Instance Method Summary collapse

Instance Method Details

#tail(n) ⇒ Object 



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# File 'lib/twitter_backup.rb', line 31

def tail(n)
  buffer = 1024
  idx = (size - buffer).abs
  chunks = []
  lines = 0
  begin
    seek(idx)
    chunk = read(buffer)
    lines += chunk ? chunk.count("\n") : 0
    chunks.unshift chunk
    idx -= buffer
  end while lines < ( n + 1 ) && pos != 0
  tail_of_file = chunks.join('')
  ary = tail_of_file.split(/\n/)
  lines_to_return = ary[ ary.size - n, ary.size - 1 ] || []
end