itsderek23

# Instruments HTTPoison calls.
#
# Example usage:
#
# defmodule DemoWeb.PageController do
#   use DemoWeb, :controller
#   alias Demo.HTTPClient
#
#   def index(conn, _params) do
#     case HTTPClient.get("https://cnn.com") do

itsderek23

Elixir foundations for Ruby Devs: transforming data

Have you ever reached for a drink of water, then realized, half-way through your first sip, it was Sprite? I like Sprite, but that first sip of a similar-looking, but very different liquid is a shock.

That's how Elixir can feel if you're coming from Ruby. The syntax looks similar, but Elixir is different from the first sip. For a smooth transition, you need to (a) learn some functional programming patterns and (b) unlearn some Object-Orientated habits.

A core design pattern of Elixir is the focus on data transformations: you'll see it in libraries like Ecto.Changeset, Ecto.Multi, Plug.Conn and built-ins like Enum. Let's dive in.

Data Transformations

itsderek23

Elixir foundations for Ruby Devs: transforming data

Have you ever reached for a drink of water, then realized, half-way through your first sip, it was Spite? I like Sprite - but that first sip of a similar-looking, but very different liquid is a shock.

That's how Elixir can feel if you are coming from Ruby. The syntax looks similar, but Elixir is different from the first sip. For a smooth transition, you need to (a) learn some functional programming patterns and (b) unlearn some Object-Orientated habits.

A core design pattern of Elixir is the focus on data transformations: you'll see it in libaries like Ecto.Changeset, Ecto.Multi, Plug.Conn and built-ins like Enum. Let's dive in.

Data Transformations

itsderek23

#! /usr/bin/env bash

# This example bash script file is located here: /home/your-username/scripts/scout_cron.sh for our example, but could be anywhere on your server.  
# Make sure you remember to make this file an executable script by: chmod +x /home/your-username/scripts/scout_cron.sh.

# Loading the RVM Environment files.  To find your unique rvm path use: rvm env --path -- ruby-version[@gemset-name].  
# For example: rvm env --path -- 1.9.3-p194@projectX
source /home/deploy/.rvm/environments/ruby-1.9.3-p374

# Changing directories to our rails project.  The example below is a Capistrano path.

itsderek23

#! /usr/bin/env bash

# This example bash script file is located here: /home/your-username/scripts/scout_cron.sh for our example, but could be anywhere on your server.  
# Make sure you remember to make this file an executable script by: chmod +x /home/your-username/scripts/scout_cron.sh.

# Loading the RVM Environment files.  To find your unique rvm path use: rvm env --path -- ruby-version[@gemset-name].  
# For example: rvm env --path -- 1.9.3-p194@projectX
source /home/deploy/.rvm/environments/ruby-1.9.3-p374

# Changing directories to our rails project.  The example below is a Capistrano path.

itsderek23

# MySQL Health plugin
# 
# Plugin is intended to monitor basic MySQL parametrs
# plugin was inspired by mysqltuner
# 
# Currently plugin monitors
#   * InnoDB data size / buffer pool
#   * Highest usage of available connections
#   * Active processes