gistfile1.coffee

assert = require 'assert'
# data = require './data.json'

exports.pack = (data, cb) ->
  binary = data.map(Number).join('')

  octets = []
  bytes = Math.ceil(binary.length / 8)
  # console.log {bytes}
  buffer = new Buffer(bytes)

  for i in [0...bytes]
    octet = binary.substring(i * 8, i * 8 + 8)
    buffer.writeUInt8 parseInt(octet, 2), i

  cb null, buffer


exports.unpack = (buffer, cb) ->
  bytes = buffer.length
  binary = ''
  for i in [0...bytes]
    octet = buffer.readUInt8(i).toString 2

    if octet.length < 8
      octet = Array(9 - octet.length).join('0') + octet

    binary += octet

  cb null, binary.split('').map(Number).map Boolean


# b = pack(data)
# console.log b
# a = unpack b
# assert.deepEqual a, data