nh2

#!/usr/bin/env bash

# Installs NixOS on a Leaseweb server, wiping the server.
#
# This is for a specific server configuration; adjust where needed.
# Originally written for a Leaseweb HP DL120 G7 server.
#
# Prerequisites:
#   * Update the script to adjust SSH pubkeys, hostname, NixOS version etc.
#

nh2

#!/usr/bin/env bash

# Installs NixOS on a Hetzner server, wiping the server.
#
# This is for a specific server configuration; adjust where needed.
#
# Prerequisites:
#   * Update the script to adjust SSH pubkeys, hostname, NixOS version etc.
#
# Usage:

tadast

require 'cgi'
require 'json'
require 'active_support'

def verify_and_decrypt_session_cookie(cookie, secret_key_base = Rails.application.secrets.secret_key_base)
  cookie = CGI::unescape(cookie)
  salt         = 'encrypted cookie'
  signed_salt  = 'signed encrypted cookie'
  key_generator = ActiveSupport::KeyGenerator.new(secret_key_base, iterations: 1000)
  secret = key_generator.generate_key(salt)[0, ActiveSupport::MessageEncryptor.key_len]

joshuafcole

Custom Functions and modules in Eve

Note: We plan to do a thorough documentation pass in the coming weeks to clean up and document the codebase. This document is a very rough draft intended to help intrepid adventurers navigate the jungle until then.

Terms Sheet

• Cardinality - The number of results a thing would return.
• Intermediate - A value which is necessary to derive the final result, but not part of the result.
• Referential Transparency - The property of always returning exactly the same output given an input.

gist:7ce9cb03b5bc6cfe6f96ec6c4940602e

#! /bin/ruby

def main argv
  n = (argv[0] || 2).to_i rescue 2
  m = (argv[1] || 20).to_i rescue 20
  g = n_gram n
  g.
    enum_for(:each_pair).
    lazy.
    sort_by {|k, v| -v }.

smarr

Introductory Material

• Add Graal JIT Compilation to Your JVM Language in 5 Steps, A Tutorial http://stefan-marr.de/2015/11/add-graal-jit-compilation-to-your-jvm-language-in-5-easy-steps-step-1/

• The SimpleLanguage, an example of using Truffle with great JavaDocs. It is the officle getting-started project: https://github.com/graalvm/simplelanguage

• Truffle Tutorial, Christan Wimmer, PLDI 2016, 3h recording https://youtu.be/FJY96_6Y3a4 Slides

0x0dea

def Process.gsub pat, sub
  mem  = File.open('/proc/self/mem', 'r+')
  maps = File.open('/proc/self/maps')

  maps.each do |map|
    from, to, perms, offset = map.scan(/(\h+)-(\h+) (\S+) (\h+)/)[0]

    if perms['rw']
      from, to = [from, to].map { |addr| addr.hex + offset.hex }
      data = mem.tap { |m| m.seek from }.read(to - from) rescue next

0x0dea

module Ova
  # autovivifying map from [class][method][signature] to Method
  @@Ova = Hash.new { |h, k| h[k] = Hash.new(&h.default_proc) }

  # Wrap #respond_to? for parity with Class#===.
  Responder = Struct.new(:method) do
    def === obj
      obj.respond_to?(method)
    end
  end

raggi

# rack_sse.ru
#
# An example of basic real-time, single-room broadcast chat using Server Sent
# Events in plain old Rack. This example does NOT use hijack, or the async
# hacks, it just relies on a well implemented threaded Rack server (at time of
# writing this will therefore only work with puma!). Other servers should be
# fixed to support this, as it is pretty critical to how Rack *should* work on
# most servers. The only spec-acceptable failure in this case is not flushing
# the content stream on each yield (for which the rack spec has no workaround
# today).

tenderlove

require 'fiddle'

module IAmAHorriblePerson
  def unset flag
    value = _wrap self
    flags = 8.times.map { |i| value[i] }.pack('C8').unpack('Q').first
    [flags & ~flag].pack('Q').unpack('C8').each_with_index { |n,i|value[i] = n }
  end

  def class= k