artificemm

  #I hate UPCASE data on the DB, so I made this to prevent it

  before_save :titleize_fields

  def titleize_fields
    ['name', 'paternal_lastname', 'maternal_lastname', 'spouse'].each do |m|
      self.send("#{m}=", instance_eval(%Q{#{m}.titleize unless #{m}.nil?}))
    end
  end

artificemm

CREATE TEXT SEARCH CONFIGURATION fr ( COPY = french );
ALTER TEXT SEARCH CONFIGURATION fr ALTER MAPPING
FOR hword, hword_part, word WITH unaccent, french_stem;

CREATE TEXT SEARCH CONFIGURATION en ( COPY = english );
ALTER TEXT SEARCH CONFIGURATION en ALTER MAPPING
FOR hword, hword_part, word WITH unaccent, english_stem;

CREATE TEXT SEARCH CONFIGURATION de ( COPY = german );
ALTER TEXT SEARCH CONFIGURATION de ALTER MAPPING

artificemm

function loadJson(callback) {
	var XmlHttpRequest = new XMLHttpRequest();
	XmlHttpRequest.overrideMimeType("application/json");
	XmlHttpRequest.open('GET', 'file.json', true);
	XmlHttpRequest.onreadystatechange = function () {
		if (XmlHttpRequest.readyState == 4 && XmlHttpRequest.status == "200") {
			// .open will NOT return a value 
			// but simply returns undefined in async mode so use a callback
			callback(XmlHttpRequest.responseText);
		}

artificemm

#SOLID Principles with ruby examples

##SRP - Single responsibility principle A class should have only a single responsibility.

Every class should have a single responsibility, and that responsibility should be entirely encapsulated. All its services should be narrowly aligned with that responsibility, this embrace the high cohesion.

##OCP - Open/closed principle Software entities should be open for extension, but closed for modification.

artificemm

--- Debian

sudo apt-get --ignore-missing install build-essential git-core curl openssl libssl-dev libcurl4-openssl-dev zlib1g zlib1g-dev libreadline6-dev libyaml-dev libsqlite3-dev libsqlite3-0 sqlite3 libxml2-dev libxslt1-dev libffi-dev software-properties-common libgdm-dev libncurses5-dev automake autoconf libtool bison postgresql postgresql-contrib libpq-dev pgadmin3 libc6-dev nodejs -y

curl -sSL https://rvm.io/mpapis.asc | gpg --import -
curl -sSL https://get.rvm.io | bash -s stable
source ~/.rvm/scripts/rvm

rvm install 2.6.2
rvm use 2.6.2 --default

artificemm

Pry Cheat Sheet

• Youtube Tutorial 2013

Command Line

• pry -r ./config/app_init_file.rb - load your app into a pry session (look at the file loaded by config.ru)
• pry -r ./config/environment.rb - load your rails into a pry session

Debugger

artificemm

function calculateDistance(rssi) {
  
  var txPower = -59 //hard coded power value. Usually ranges between -59 to -65
  
  if (rssi == 0) {
    return -1.0; 
  }

  var ratio = rssi*1.0/txPower;
  if (ratio < 1.0) {

artificemm

require 'set'

# Solved exercises 
# Roberto Ruiz
# For Tinnova

# 1:
input = [{ "name": 'eggs', "price": 1 }, { "name": 'coffee', "price": 9.99 }, { "name": 'rice', "price": 4.04 }]

def sort_hash_by_price(ary)

artificemm

module Navigable
    extend ActiveSupport::Concern

    def next
        self.class.where("id > ?", self.id).order(id: :asc).first
    end

    def previous
        self.class.where("id < ?", self.id).order(id: :desc).first
    end

artificemm

# from_cte_sql = ::Namespace::From.where_clause
# ..


from_table = Arel::Table.new(:from_lane)
to_table = Arel::Table.new(:to_lane)
rates_table = Arel::Table.new(:rates)

rates_table
  .join(from_table).on(rates_table[:from_id].eq(from_table[:id]))