Class: File

Inherits:
Object
  • Object
show all
Defined in:
lib/tailog/ext/file.rb

Instance Method Summary collapse

Instance Method Details

#tail(n) ⇒ Object 



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# File 'lib/tailog/ext/file.rb', line 2

def tail(n)
  buffer = 1024
  idx = size > buffer ? size - buffer : 0
  chunks = []
  lines = 0

  begin
    seek(idx)
    chunk = read(buffer)
    break unless chunk
    lines += chunk.count("\n")
    chunks.unshift chunk
    idx -= buffer
  end while lines < ( n + 1 ) && idx >= 0

  chunks.join('').split(/\n/).last(n)
end