obliviusm

Abstract

You could have postgre installed on localhost with password (or without user or password seted after instalation) but if we are developing we really don't need password, so configuring postgre server without password for all your rails project is usefull.

Install Postgre packages

Go to Postgre Download Site

Install Postgre gem

/Gemfile

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// app/assets/javascripts/modals.js

$(function() {
  const modal_holder_selector = '#modal-holder';
  const modal_selector = '.modal';

  $(document).on('click', 'a[data-modal]', function() {
    const location = $(this).attr('href');
    // Load modal dialog from server
    $.get(

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# app/controllers/messages_controller.rb

class MessagesController < ApplicationController

  respond_to :html, :json

  def new
    @message = Message.new
    respond_modal_with @message
  end

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<%# app/views/layouts/_header.html.erb %>

<%= link_to 'Add Message', new_message_path, class: 'btn btn-outline-success my-2 my-sm-0', data: { modal: true } %>

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<%# app/views/messages/_form.html.erb %>

<%= simple_form_for(@message, remote: request.xhr?, html: { data: { modal: true } }) %>

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defmodule ShepherdHeadTail do
  def count_sheeps([]), do: 0

  def count_sheeps(sheeps) do
    [head | tail] = sheeps
    count_sheeps(tail) + (if head, do: 1, else: 0)
  end
end

defmodule ShepherdAccumulator do

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defmodule TestShepherd do
  use ExUnit.Case
  import Shepherd, only: [count_sheeps: 1]

  test "work for some examples" do
    assert count_sheeps([]) == 0
    assert count_sheeps([true]) == 1
    assert count_sheeps([true, false]) == 1
    assert count_sheeps([false, false]) == 0
    assert count_sheeps(

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defmodule Shepherd do
  def count_sheeps(sheeps) do
    # TODO: for Elixir only true/false values can be presented the in sheeps list
  end
end

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Data structures

• immutable

List

[1,2,:a,"b"]

• IS: linked list
• cheap to work with the start of the list CRUD
• expensive to work with the end CRUD

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cd android && bundle exec fastlane android beta