class BufferedTokenizer

something like EventMachine (rubyeventmachine.com/).
by which entities are delimited. In this respect it’s ideally paired with
receives arbitrary length datagrams which may-or-may-not contain the token
by default. It allows input to be spoon-fed from some outside source which
BufferedTokenizer takes a delimiter upon instantiation, or acts line-based

def extract(data)

the string, meaning the last element is the start of the next chunk.
Using -1 makes split to return "" if the token is at the end of

tokenizer.extract(data).map { |entity| Decode(entity) }.each do ...

makes for easy processing of datagrams using a pattern like:
tokenized entities, provided there were any available to extract. This
Extract takes an arbitrary string of input data and returns an array of 
def extract(data)
  if @trim > 0
    tail_end = @tail.slice!(-@trim, @trim) # returns nil if string is too short
    data = tail_end + data if tail_end
  end
  @input << @tail
  entities = data.split(@delimiter, -1)
  @tail = entities.shift
  unless entities.empty?
    @input << @tail
    entities.unshift @input.join
    @input.clear
    @tail = entities.pop
  end
  entities
end

def flush

a token has not yet been encountered
Flush the contents of the input buffer, i.e. return the input buffer even though 
def flush
  @input << @tail
  buffer = @input.join
  @input.clear
  @tail = "" # @tail.clear is slightly faster, but not supported on 1.8.7
  buffer
end

def initialize(delimiter = $/)

number of objects required for the operation.
which is only joined when a token is reached, substantially reducing the
appropriate data structure). Segments of input data are stored in a list
approach given language constraints (in C a linked list would be a more
The input buffer is stored as an array. This is by far the most efficient

which is by default the global input delimiter $/ ("\n").
New BufferedTokenizers will operate on lines delimited by a delimiter, 
def initialize(delimiter = $/)
  @delimiter = delimiter
  @input = []
  @tail = ''
  @trim = @delimiter.length - 1
end