mziwisky

ruby-debug cheatsheet

s[tep] -- step into next call

n[ext] -- step over next call

l[ist] = -- show the current line, in context. e.g.:

   26          end

27 end

mziwisky

OAUTH2

The Problem

I’m a web app that wants to allow other web apps access to my users’ information, but I want to ensure that the user says it’s ok.

The Solution

I can’t trust the other web apps, so I must interact with my users directly. I’ll let them know that the other app is trying to get their info, and ask whether they want to grant that permission. Oauth defines a way to initiate that permission verification from the other app’s site so that the user experience is smooth. If the user grants permission, I issue an AuthToken to the other app which it can use to make requests for that user's info.

Note on encryption

Oauth2 has nothing to do with encryption -- it relies upon SSL to keep things (like the client app’s shared_secret) secure.

mziwisky

var authExpirationHandler,
    errorHandler;

function catchUnauthorizedResponses(data) {
  if (data.status === 401 && !maybeLocalStorage.getItem("token")) {
    // ensure the in-memory session really is expired before destroying it
    return axios.get("/api/auth/session").then(
      (response) => {
        // we ARE still auth'd, so just throw the error down the chain
        throw data;

mziwisky

* 3e39dc2 (HEAD -> declare-positionState, origin/declare-positionState) declare positionState var
* 6bb203e (origin/remove-jsx-pragma, remove-jsx-pragma) remove `@jsx` pragma from source
* e64cb8e (origin/react-0.14, react-0.14) update for react-0.14
* 18fcafd (origin/allow-role-override, allow-role-override) allow overriding role and setting arbitrary props on MenuOption
* dee59db (neil/master, neil-clickblur-handling) Limit focusing of react-menu to fix UI bug
* db914fc (duane/remove-constrain, duane/master, duane) Remove constrain
* 16a04d3 (neil/preferred_position, duane/preferred_position) Use react getDefaultProps instead of constrain
* fac6ffa Add preferredHorizontal and preferredVertical props
* 103b0c3 (neil/toggle_option, duane/toggle_option) Add keepOpenOnSelect boolean option to Menu
| * 8288c86 (karma-webpack) WIP replace browserify with webpack for builds

mziwisky

let foo = {
  alpha () {
    return this.bravo();
  },
  bravo () {
    return "charlie";
  }
}

export default foo;

mziwisky

irb(main):001:0> require_relative 'test'
AWS SDK version: 2.7.16
== TEST: test_copy_west_from_east
IT'S GOOD

== TEST: test_copy_east_from_west
IT'S GOOD

# ^ copy_from works fine regardless of direction

mziwisky

Child = React.createClass({

  focusThing () {
    this.btn.focus();
  },

  render () {
    return (
      <div>
        Here's the thing to <button ref={ el => this.btn = el }>focus</button>

mziwisky

# ~/.dinghy/preferences.yml
---
:preferences:
  :unfs_disabled: false
  :proxy_disabled: true
  :dns_disabled: false
  :fsevents_disabled: false
  :create:
    cpus: 4
    memory: 16384

mziwisky

#!/usr/bin/env ruby

require 'open3'

puts 'party time'
output = ''
status = Open3.popen2e('./sub.rb') do |std_in, std_out_err, wait_thr|
  Thread.new do
    begin
      while out = std_out_err.readpartial(64)

mziwisky

# binary search by ID to find record of type `model` whose created_at is closest to `timestamp`.
# assumes created_at is a monotonically increasing function of ID.
# `low_end_bias` is used to begin the search somewhere other than the first
# model ever. it's a percentage of records. useful when you know that the thing
# you're looking for is near the end of the list, which is the case for the
# thing I'm currently looking for, so I'm defaulting it to 0.99

def find_closest_to(model, timestamp, low_end_bias = 0.99)
  high_mark = model.last
  low_id = (high_mark.id * low_end_bias).round