JoelQ

class Tree
  attr_reader :val, :left, :right

  def self.empty
    EmptyTree.new
  end

  def self.leaf(val)
    new(val, empty, empty)
  end

captainsafia

# Create a global gitignore for macOS
cat https://raw.githubusercontent.com/github/gitignore/master/Global/macOS.gitignore >> ~/.gitignore_global 
git config --global core.excludesfile ~/.gitignore_global

# Send screenshots to a directory that isn't the desktop
mkdir -p ~/Screenshots
defaults write com.apple.screencapture location ~/Screenshots

# Show all hidden files (like dotfiles)
defaults write com.apple.finder AppleShowAllFiles YES; killall Finder;

kitze

import {NetworkStatus} from 'apollo-client';
import get from 'lodash/get';
import React, {Component} from 'react';
import {Query} from 'react-apollo';

class Data extends Component {
 
  state = {refreshing: false};

  onRefresh = refetch => {

taion

const redisClient = redis.createClient(REDIS_URL);
const listeners = Object.create(null);

function addListener(channel, listener) {
  if (!listeners[channel]) {
    listeners[channel] = [];
    redisClient.subscribe(channel);
  }

  listeners[channel].push(listener);

bastman

Docker - How to cleanup (unused) resources

Once in a while, you may need to cleanup resources (containers, volumes, images, networks) ...

delete volumes

// see: https://github.com/chadoe/docker-cleanup-volumes

$ docker volume rm $(docker volume ls -qf dangling=true)

$ docker volume ls -qf dangling=true | xargs -r docker volume rm

dhh

# MODEL

class Case < ActiveRecord::Base
  include Eventable
  
  has_many :tasks

  concerning :Assignment do
    def assign_to(new_owner:, details:)
      transaction do

remino

# Gemfile

gem 'kramdown'

pcreux

group :production do
  gem 'unicorn'

  # Enable gzip compression on heroku, but don't compress images.
  gem 'heroku-deflater'

  # Heroku injects it if it's not in there already
  gem 'rails_12factor'
end

lukaszx0

View Classes

This is a working draft of proposal. Feel free to comment, express your opinions and suggest alternative solutions.

Problem

As a second part of my Google Summer of Code, I planned to introduce View Classes to Action View.

There was ongoing discussion about this and extracting AV from AP (which is done already: rails/rails#11396) here: https://groups.google.com/forum/#!topic/rubyonrails-gsoc/N7uDY_6513I

polotek

This is a brain dump of my experience trying to get something going with Ember.js. My goal was to get to know the ins and outs of the framework by completing a pretty well defined task that I had lots of domain knowledge about. In this case reproducing a simple Yammer feed. As of this time, I have not been able to complete that task. So this is a subjective rundown of the things I think make it difficult to get a handle on Ember. NOTE: My comments are addressing the Ember team and giving suggestions on what they could do to improve the situation.

App setup

The new guides have pretty good explanation of the various parts of the framework; routers, models, templates, views. But it's not clear how they all get strapped together to make something that works. There are snippets of examples all over the place like:

App.Router.map(function() {
  match('/home').to('home');
});