code: function array(arr) {
    var buffers = []
      , buf
      , i
      , len = 0;
    for(i = 0; i < arr.length; i++) {
      buf = this.getStringBuffer(arr[i]);
      len += buf.length;
      buffers.push(buf);
    }
    return Buffer.concat(buffers, len);
  }
docs: Get a buffer from an array of strings.