| #!/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. | |
| # |
| #!/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: |
| 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] |
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.
| #! /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 }. |
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
| 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 |
| 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 |
| # 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). |
| 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 |