joshuawscott

LZF Format

LZF is made of 1 or more "Chunks" that are simply concatenated to each other.

Chunk Layout

   "Z"   |  "V"   | Type   |compressed length| original length | payload
+--------+--------+--------+--------+--------+--------+--------+=================
|01011010|01010110|0000000C|LLLLLLLL|LLLLLLLL|BBBBBBBB|BBBBBBBB| L bytes of data
+--------+--------+--------+--------+--------+--------+--------+=================

joshuawscott

Pending: (Failures listed here are expected and do not affect your suite's status)

  1) AppNexus Advertiser writeme, testme, useme
     # Not yet implemented
     # ./spec/integration/advertiser_spec.rb:4

Failures:

  1) AppnexusApi::Connection returns data from expiration
     Failure/Error: fail "#{response.body['response']['error_code']}/#{response.body['response']['error_description']}"

joshuawscott

News

Rails 5.0 released

• Annoucement
• RoR Guide updated for 5.0
• Tutorial updated for 5.0

Deets:

• ActionCable - websockets in rails!
• API mode - strip out all the unneeded parts of rails when you just want an API

joshuawscott

# [[87283, 1442412746, 18052, ["hincrby", "191320:2015-09-16", "2015-09-16T13:39:00.000Z", "1"]], [87282, 1442411252, 22037, ["setex", "sifi_session:da34d588e031730b84a0462538022c60", "604800", "\u0004\b{\u0000"]], [87281, 1442410521, 81575, ["scan", "0", "MATCH", "CampaignStatistic:*", "COUNT", "1000"]], [87280, 1442409284, 12309, ["hincrby", "167569:2015-09-16", "2015-09-16T12:57:00.000Z", "1"]], [87279, 1442409279, 11073, ["hincrby", "163562:2015-09-16", "2015-09-16T12:55:00.000Z", "1"]], [87278, 1442409206, 14440, ["hincrby", "163558:2015-09-16", "2015-09-16T12:40:00.000Z", "1"]], [87277, 1442409198, 14750, ["hincrby", "187840:2015-09-16", "2015-09-16T12:34:00.000Z", "1"]], [87276, 1442409180, 11376, ["hincrby", "127478:2015-09-16", "2015-09-16T12:07:00.000Z", "1"]], [87275, 1442405559, 18445, ["hincrby", "182934:2015-09-16", "2015-09-16T11:13:00.000Z", "1"]], [87274, 1442405558, 57467, ["hincrby", "17342:2015-09-16", "2015-09-16T11:03:00.000Z", "1"]]]
require 'redis'

class Entry
  attr_reader :log_numbe

joshuawscott

require 'sequel'

class Point
  attr_accessor :long, :lat
  def initialize(long, lat)
    @long = long
    @lat = lat
  end

  def self.from_str(str)

joshuawscott

var http = require('http');
if (process.argv.length <= 3) {
  console.error('USAGE: node curlsocket.js /path/to/unix.sock /request/path');
  process.exit();
}

var options = {
    method: 'GET',
    hostname: 'localhost',
    socketPath: process.argv[2],

joshuawscott

jscott=# \d t1
              Table "public.t1"
 Column |          Type          | Modifiers
--------+------------------------+-----------
 id     | integer                |
 name   | character varying(255) |
Indexes:
    "id_idx" btree (id)
    "idx_name" btree (name)

joshuawscott

-- Sets KEY to VALUE, preserving any existing TTL
-- Call with EVAL "..." 1 KEY VALUE
-- or 
-- LOAD SCRIPT "..."
-- => <SHA1>
-- EVALSHA <SHA1> 1 KEY VALUE

local ttl = redis.pcall('ttl', KEYS[1])
if ttl == -1 then
         return redis.pcall('set', KEYS[1], ARGV[1])

joshuawscott

Compression

935MB nginx log (dpx)

MB/sec in both charts means:

orig. size - compressed size
____________________________
         real time

joshuawscott

defmodule Prime do
  def known_primes, do: [2, 3, 5, 7, 11, 13, 17, 19, 23, 29, 31, 37, 41, 43, 47, 53, 67, 71, 73, 79, 83, 89, 97, 101, 103, 107, 109, 113, 127, 131, 137, 139, 149, 151, 157, 163, 167, 173, 179, 181, 191, 193, 197, 199]
  def is_prime(n) when n > 9409, do: :cannot_calculate
  def is_prime(n) when n < 2, do: false
  def is_prime(2), do: true
  def is_prime(n), do: check_primes(n, known_primes)

  def check_primes(_,[]), do: true
  def check_primes(n, [head|_tail]) when head*head > n, do: true
  def check_primes(n, [head|tail]), do: rem(n, head) != 0 and check_primes(n, tail)