nicholasjhenry

GraphQL Schema Language Cheat Sheet

The definitive guide to express your GraphQL schema succinctly

A port of a cheat sheet authored by Hafiz Ismail.

What does it look like?

defmodule MyApp.Schema do
 use Absinthe.Schema

lindaliukas

Links: 

A Visual Introduction to Machine Learning
http://www.r2d3.us/visual-intro-to-machine-learning-part-1/

UC Berkeley CS188 Intro to AI -- Course Materials
http://ai.berkeley.edu/home.html

Eyeo 2016 – Gene Kogan
https://vimeo.com/180044029

danielberkompas

defmodule MyApp.Scheduler do
  @moduledoc """
  Schedules a Mix task to be run at a given interval in milliseconds.

  ## Options

  - `:task`: The name of the Mix task to run.
  - `:args`: A list of arguments to pass to the Mix task's `run/1` function.
  - `:interval`: The time interval in millisconds to rerun the task.

mcshakes

$ rails c
Running via Spring preloader in process 7916
/Users/edmac/.rvm/gems/ruby-2.3.1/gems/activesupport-5.0.0.1/lib/active_support/dependencies.rb:293:in `require': dlopen(/Users/edmac/.rvm/rubies/ruby-2.3.1/lib/ruby/2.3.0/x86_64-darwin14/readline.bundle, 9): Library not loaded: /usr/local/opt/readline/lib/libreadline.6.dylib (LoadError)
  Referenced from: /Users/edmac/.rvm/rubies/ruby-2.3.1/lib/ruby/2.3.0/x86_64-darwin14/readline.bundle
  Reason: image not found - /Users/edmac/.rvm/rubies/ruby-2.3.1/lib/ruby/2.3.0/x86_64-darwin14/readline.bundle
  
  
  Fixed with: 
  
  ln -s /usr/local/opt/readline/lib/libreadline.7.0.dylib /usr/local/opt/readline/lib/libreadline.6.dylib

sdogruyol

lock '3.5.0'

set :application, 'your-app'
set :repo_url, 'https://github.com/your/app'
set :deploy_to, '/home/deploy/apps/your-app/'

namespace :deploy do
  after :updated, :build do
    on roles(:web) do
    	execute "cd '#{release_path}' && shards install"

taiansu

import "phoenix_html"
import "bootstrap"
import "jquery"
import "toastr"

// ...

pnc

Just about the only thing that'll crash the Erlang VM is running out of memory. Although processes themselves are cheap, a good way to run out of memory is to start an unbounded number of processes from an external signal (such as one per web request), and then make each of those processes hold onto some more expensive resource. If you're not careful about cleanup, you can also leak processes, which compounds the problem. Anyway, nobody's perfect, so to avoid these cases, we use the poolboy library in a bunch of places to handle process pools that handle cleanup and limit the total amount of concurrency to some reasonable amount.

When:

1. all a pool's workers are checked out (by actual organic load/concurrency)
2. some process is leaking pool workers by not checking them back in (rude)
3. the pool supervisor isn't responding (it's deadlocked, bugs, etc.)

you'll see "checkout" timeouts (waited longer than the timeout to check out a worker from the pool):

fschuindt

My Elixir Study Notes

Important Links

• Writing Assertive Code With Elixir

Notes

• Get some help:

iex> i 'hello'
Term

maxim

defmodule EctoBatchStream do
  import Ecto.Query, only: [from: 1, from: 2]

  @batch_size 1000

  # Example:
  #
  #     query = from u in MyApp.User, select: u.email
  #     stream = EctoBatchStream.stream(MyApp.Repo, query)
  #     stream |> Stream.take(3) |> Enum.to_list # => […]

kzkin

# Phoenix Framework - A productive web framework that does not compromise speed and maintainability

[Unit]
Description=Phoenix Framework ISControl Application
After=network.target

[Service]
Type=simple
User=deployer
RemainAfterExit=yes