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const http = require('http');
const express = require('express');
const redis = require('redis');
const { RateLimiterRedis } = require('rate-limiter-flexible');
const redisClient = redis.createClient({
  enable_offline_queue: false,
});

const maxWrongAttemptsByIPperMinute = 5;
const maxWrongAttemptsByIPperDay = 100;

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check host localhost with address 127.0.0.1
        start "/sbin/start myapp"
        stop "/sbin/stop myapp"
        if failed port 3000 protocol HTTP
                request /
                with timeout 5 seconds
                then restart

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Using Docker and docker-compose to manage Apache Airflow on mac

Using our beloved docker and docker-compose, we can very quickly bring up an Apache Airflow instance on our mac.

Contents of docker-compose.yml

About the only thing you need to customize in this docker-compose.yml file is the volumes section. This will tell docker to map the given directory containing your Airflow DAGs/plugins to container file system.

version: '3'
services:

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Update Homebrew’s package database.

brew update

To install the MongoDB binaries, issue the following command in a system shell:

brew install rabbitmq

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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.

---

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var amqp = require('amqplib/callback_api');

// if the connection is closed or fails to be established at all, we will reconnect
var amqpConn = null;
function start() {
  amqp.connect(process.env.CLOUDAMQP_URL + "?heartbeat=60", function(err, conn) {
    if (err) {
      console.error("[AMQP]", err.message);
      return setTimeout(start, 1000);
    }

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#!/bin/bash

# args: browser
# example: ./getOpenTabs.sh "Brave Browser"
# credits:
#  https://gist.github.com/samyk/65c12468686707b388ec43710430a421

# TODO:
#  validate args
#  don't open app if not already open

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# shows all url+titles of Chrome along with front window+tab url+title
 set titleString to ""
 
 tell application "Google Chrome"
         set window_list to every window # get the windows
         
         repeat with the_window in window_list # for every window
                 set tab_list to every tab in the_window # get the tabs
                 
                 repeat with the_tab in tab_list # for every tab

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Install RabbitMQ on CentOS 7

sudo yum -y install epel-release
sudo yum -y update

Install Erlang

Download repository

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# To extract the sound from a video and save it as MP3:
ffmpeg -i <video.mp4> -vn <sound>.mp3

# To convert frames from a video or GIF into individual numbered images:
ffmpeg -i <video.mpg|video.gif> <frame_%d.png>

# To combine numbered images (frame_1.jpg, frame_2.jpg, etc) into a video or GIF:
ffmpeg -i <frame_%d.jpg> -f image2 <video.mpg|video.gif>

# To quickly extract a single frame from a video at time mm:ss and save it as a 128x128 resolution image: