alfonsodev

1. Change your database RDS instance security group to allow your machine to access it.
   • Add your ip to the security group to acces the instance via Postgres.
2. Make a copy of the database using pg_dump
   • $ pg_dump -h <public dns> -U <my username> -f <name of dump file .sql> <name of my database>
   • you will be asked for postgressql password.
   • a dump file(.sql) will be created
3. Restore that dump file to your local database.
   • but you might need to drop the database and create it first
   • $ psql -U <postgresql username> -d <database name> -f <dump file that you want to restore>

• the database is restored

alfonsodev

Multiple SSH Keys settings for different github account

create different public key

create different ssh key according the article Mac Set-Up Git

$ ssh-keygen -t rsa -C "your_email@youremail.com"

alfonsodev

// Retry 5 times with waiting for 2 seconds
function* updateApi(data) {
  for(let i = 0; i < 5; i++) {
    try {
      const apiResponse = yield call(apiRequest, { data });
      return apiResponse;
    } catch(err) {
      if(i < 4) {
        yield call(delay, 2000);
      }

alfonsodev

When should you use action creator and when reducer?

Action creator

• you need to have side effects
• you need to read from store to decide what to do
• you need to dispatch more than one action
• action produced by action creator needs to contain all the data reducer can need to shape the components state

Reducer

• should not have any side effects

alfonsodev

#!/bin/sh

# Based on gist.github.com/gboudreau/install-ffmpeg-amazon-linux.sh
# and https://trac.ffmpeg.org/wiki/CompilationGuide/Centos
if [ "`/usr/bin/whoami`" != "root" ]; then
    echo "You need to execute this script as root."
    exit 1
fi

cat > /etc/yum.repos.d/centos.repo<<EOF

alfonsodev

Google's authentication-less on-the-fly image resizing service

I found it while poking around the Google+ HTML. Jotting down some notes felt like a good idea, so here goes. If you know more about this API, let me know, please!

(Word of warning: I spent ~30 minutes on both my experimentation and this here write-up, so it might not be the most thought-provoking, brilliant thing you read today.)

alfonsodev

# more detailed instructions are at http://dev.iron.io/mq-onpremise/getting_started

# Get a coreos VM up
git clone https://github.com/coreos/coreos-vagrant.git
cd coreos-vagrant/
vagrant up

# get into the coreos box
vagrant ssh

alfonsodev

This is my response to an email asking about Domain-Driven Design in golang project.

Thank you for getting in touch. Below you will find my thoughts on how golang works with DDD, changing it. This is merely a perception of how things worked out for us in a single project.

That project has a relatively well-known domain. My colleagues on this project are very knowledgeable, thoughtful and invested in quality design. The story spelled out below is a result of countless hours spent discussing and refining the approach.

Conclusions could be very different, if there was a different project, team or a story-teller.

Short story

alfonsodev

package main

import (
	"fmt"
	"os"
	"io/ioutil"
	"strings"
	"time"
	"encoding/json"
)

alfonsodev

Setting up a SSL Cert from Comodo

I use Namecheap.com as a registrar, and they resale SSL Certs from a number of other companies, including Comodo.

These are the steps I went through to set up an SSL cert.

Purchase the cert