pyrou

version: '3'
services:
  traefik:
    restart: unless-stopped
    image: traefik:v2.0.2
    ports:
      - "80:80"
      - "443:443"
    labels:
      - "traefik.http.services.traefik.loadbalancer.server.port=8080"

jstanley0

# list pid, execution time, and query text for running queries
def pg_ps
  now = Time.now
  ActiveRecord::Base.connection.execute("SELECT pid, query, query_start FROM pg_stat_activity WHERE state='active'").to_a.each do |q|
    printf "%8d %10.2f  %s\n", q['pid'], now - DateTime.parse(q['query_start']), q['query']
  end
  nil
end

# cancel the current query for the given process

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

iansltx

Safari iframe cookie workaround

Safari by default discards cookies set in an iframe unless the host that's serving the iframe has set a cookie before, outside the iframe. Safari is the only browser that does this.

The 10k foot view

In order to get around the issue, the parent (src) and child/iframed/remote (dest) site have to work together, if the source site only wants users to access the destination via the iframe and can't assume that the user has visited the destination host before.

staltz

The introduction to Reactive Programming you've been missing

(by @andrestaltz)

---

This tutorial as a series of videos

If you prefer to watch video tutorials with live-coding, then check out this series I recorded with the same contents as in this article: Egghead.io - Introduction to Reactive Programming.

---

MohamedAlaa

tmux shortcuts & cheatsheet

start new:

tmux

start new with session name:

tmux new -s myname