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jnunemaker / gist:87fb475129c0601fa72695afe912b02f
Created Sep 7, 2017
sha256 hexdigest to number for use in mapping a string to a partition number (not consistent hashing, but just in simple hash => partition)
View gist:87fb475129c0601fa72695afe912b02f
irb(main):001:0> require "digest"
=> true
irb(main):002:0> Digest::SHA256.hexdigest("asdf")
=> "f0e4c2f76c58916ec258f246851bea091d14d4247a2fc3e18694461b1816e13b"
irb(main):003:0> Digest::SHA256.hexdigest("asdf").to_i(16)
=> 108959270400061671294053818573968651411470832267186275529291850190552309358907
irb(main):004:0> Digest::SHA256.hexdigest("asdf").to_i(16).to_s(16)
=> "f0e4c2f76c58916ec258f246851bea091d14d4247a2fc3e18694461b1816e13b"
irb(main):005:0> Digest::SHA256.hexdigest("asdf").to_i(16) % 10
=> 7

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jnunemaker / mute_all_unread.js
Last active Feb 3, 2016
terrible github web notifications #protip: command + click any notifications you care about to open in new tab, then run the following in js console to mute the rest
View mute_all_unread.js
$('li.unread button.mute-note').each(function() { });
jnunemaker /
Created Apr 28, 2014 bash automation
catspam() {
curl -vvvv -d "{\"Body\":\"${1}\"}" -H "Content-Type: application/json"
jnunemaker /
Last active Aug 29, 2015
things that i've read, listened to, or tried in an effort to heal my hands/wrists/arms/shoulders
jnunemaker / blocking_with_check.rb
Created Aug 9, 2013
Kestrel blocking client with signal checks for the kestrel-client gem.
View blocking_with_check.rb
module Kestrel
class Client
class BlockingWithCheck < Blocking
attr_accessor :return_check
def get(*args)
count = 0
while count += 1
jnunemaker / Gemfile
Created Mar 11, 2013
Eventually consistent alternate indexes using cassanity.
View Gemfile
source ''
gem 'cassanity'
jnunemaker / db.rake
Created Mar 4, 2013
db.rake tasks for cassanity + migrations.
View db.rake
# ******************************************************************************
# NOTE: You will need to replace keyspace and migrations_path in the rake tasks
# below with whatever makes sense for your application. You will also need a
# task named environment that loads whatever is need to make cassanity available.
# ******************************************************************************
namespace :db do
desc "Run any pending migrations."
task :migrate => :environment do
require 'cassanity/migrator'
jnunemaker / paginate_without_total.rb
Last active Dec 11, 2015
Paginate without the count for plucky. Probably doesn't work with will paginate, but if you just have previous / next it works great and avoids expensive count calls.
View paginate_without_total.rb
Plucky::Query.class_eval do
def paginate_without_total(opts={})
page = (opts.delete(:page) || 1).to_i
limit = (opts.delete(:per_page) || per_page).to_i
skip = (page - 1) * limit
all(opts.merge(:limit => limit, :skip => skip))