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function State() {
  this.actions = {};
  this.subscriptions = [];
  this.history = [];
}

State.prototype.subscribe = function(element, action, callback) {
  this.subscriptions[action] = this.subscriptions[action] || [];
  this.subscriptions[action].push(function(data) {
    callback.apply(element, data);

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# Either use node version specified in package.json
use node package.json

# Or a specific version
use node 5.0.0

# Rest of direnv setup..
export FOO=BAR

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#!/bin/sh
echo -n '{'

# memory as "mem": { "current": 800, "total": 1024, "load", 82 } where amount is in MB and load in %
free -m | awk 'NR==2{printf "\"mem\": { \"current\":%d, \"total\":%d, \"load\": %.2f }", $3,$2,$3*100/$2 }'

echo -n ','

# diska as "disk": { "current": 6, "total": 40, "used": 19 } where amount is in GB and used in %
df -h | awk '$NF=="/"{printf "\"disk\": { \"current\":%d, \"total\":%d, \"used\": %d }", $3,$2,$5}'

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# Client id from Google Developer console
# Client Secret from Google Developer console
# Scope this is a space seprated list of the scopes of access you are requesting.

# Authorization link.  Place this in a browser and copy the code that is returned after you accept the scopes.
https://accounts.google.com/o/oauth2/auth?client_id=[Application Client Id]&redirect_uri=urn:ietf:wg:oauth:2.0:oob&scope=[Scopes]&response_type=code

# Exchange Authorization code for an access token and a refresh token.

curl \

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1) see re: increasing shmmax http://stackoverflow.com/a/10629164/1283020

2) add to postgresql.conf:
shared_preload_libraries = 'pg_stat_statements'   # (change requires restart)
136 pg_stat_statements.max = 1000
137 pg_stat_statements.track = all

3) restart postgres

4) check it out in psql

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namespace :db do
  desc "Migrates the database to the target version, or to the lastest version if no target is given"
  task :migrate, [:target, :current] => :environment do |t, args|
    opts = {}
    opts[:target]  = args[:target].to_i  if args[:target]
    opts[:current] = args[:current].to_i if args[:current]

    Sequel::Migrator.run(DB, "db/migrate", opts)
    Rake::Task["db:dump"].invoke if Rails.env.development?
  end

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#!/bin/bash

# Based on the "Shell image viewer" by Andreas Schönfelder:
# https://bbs.archlinux.org/viewtopic.php?id=106089

# Defaults.
doublexres="yes"
colors="$(tput colors)"
size="$(($(tput cols) - 2))x$(($(tput lines) - 2))"

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app = node[:rails][:app]

rails_base app[:name] do
  ruby_ver app[:ruby_ver]
  gemset app[:gemset]
end

%w{config log pids cached-copy bundle system}.each do |dir|
  directory "#{app[:app_root]}/shared/#{dir}" do
    owner app[:deploy_user]

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Each of these commands will run an ad hoc http static server in your current (or specified) directory, available at http://localhost:8000. Use this power wisely.

Discussion on reddit.

Python 2.x

$ python -m SimpleHTTPServer 8000

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// Use Gists to store code you would like to remember later on
console.log(window); // log the "window" object to the console