mayra-cabrera

package main

import "golang.org/x/tour/pic"

func Pic(dx, dy int) [][]uint8 {
	z := make([][]uint8, dy)
	for i := range z {
		z[i] = make([]uint8, dx)
		for j := range z[i]{
			z[i][j] = uint8(i^j+(i+j)/2)

mayra-cabrera

class Post
end

mayra-cabrera

class User
  has_many :departments
  
  def department_name
    departaments.join(",")
  end
end

def user_info(user)
  "Name: #{user.name}. Dept: #{user.department_name}"

mayra-cabrera

class User
  delegate :name, to: :department, prefix: true, allow_nil: true
  # ...
end

def user_info(user)
  "Name: #{user.name}. Dept: #{user.department_name}"
end

mayra-cabrera

def user_info(user)
  "Name: #{user.name}. Dept: #{user.departments.map(&:name).join(",")}"
end

mayra-cabrera

def user_info(user)
  "Name: #{user.name}. Boss: #{user.department.try(:head).try(:name)}"
end

mayra-cabrera

def user_info(user)
  "Name: #{user.name}. Dept: #{user.department.try(:name)}"
end

mayra-cabrera

class PostDecorator
  attr_reader :post
  
  def initialize post
    @post = post
  end
  
  def is_recent?
    published_at > 2.days.ago
  end

mayra-cabrera

- if @post_decorator.recent?
  = image_tag(@post_decorator.image)
  
  
  

mayra-cabrera

class PostDecorator
  attr_reader :post
  
  def initialize post
    @post = post
  end
  
  def recent?
    published_at > 2.days.ago
  end