filipevarjao

import subprocess

# AST Node Types
class Statement:
    pass

class Expression:
    pass

class Assign(Statement):

filipevarjao

# Zap
defmodule Zap do
  use GenServer

  @type state :: map()

  def start_link(opts \\ []) do
    GenServer.start_link(__MODULE__, [], name: __MODULE__)
  end

filipevarjao

# Client chat
defmodule Chat do
  require Logger

  def msg_loop() do
    receive do
      {:message_type, value} ->
        spawn(fn -> Logger.info("Msg: #{value}") end)
    end

filipevarjao

version: "3"
services:
  db:
    image: "postgres"
    container_name: "postgres_db"
    environment:
      - POSTGRES_USER=postgres
      - POSTGRES_PASSWORD=postgres
      - POSTGRES_DB=db
    ports:

filipevarjao

netstat -nap | grep nginx
tcp        0      0 0.0.0.0:80              0.0.0.0:*               LISTEN      1/nginx: master pro 
unix  3      [ ]         STREAM     CONNECTED     200611   1/nginx: master pro  
unix  3      [ ]         STREAM     CONNECTED     200612   1/nginx: master pro

filipevarjao

PSQL

Magic words:

psql -U postgres

Some interesting flags (to see all, use -h or --help depending on your psql version):

• -E: will describe the underlaying queries of the \ commands (cool for learning!)
• -l: psql will list all databases and then exit (useful if the user you connect with doesn't has a default database, like at AWS RDS)

filipevarjao

package main

import (
    "fmt"
    "math"
    "math/rand"
    "time"
)

func main() {

filipevarjao

-module(kitty_gen_server).
-behaviour(gen_server).

-export([start_link/0, order_cat/4, return_cat/2, close_shop/1]).
-export([init/1, handle_call/3, handle_cast/2, handle_info/2,
         terminate/2, code_change/3]).

-record(cat, {name, color=green, description}).

%%% Client API

filipevarjao

-module(kitty_gen_server).
-behaviour(gen_server).

-export([start_link/0, order_cat/4, return_cat/2, close_shop/1]).
-export([init/1, handle_call/3, handle_cast/2, handle_info/2,
         terminate/2, code_change/3]).

-record(cat, {name, color=green, description}).

%%% Client API

filipevarjao

typedef struct _object {
    _PyObject_HEAD_EXTRA
    Py_ssize_t ob_refcnt;
    int color;        /* the color of local mark-scan where 0 black, 1 red 2 green */
    struct _typeobject *ob_type;
} PyObject;


#define _Py_CHECK_REFCNT(OP)                                    \