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Mayra Cabrera mayra-cabrera

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Nothing to do here. Go to https://gitlab.com/mayra-cabrera instead
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@mayra-cabrera
mayra-cabrera / decorator_pattern_2.html.haml
Created August 23, 2015 17:40
- if @post.is_recent?
= image_tag(@post.image)
@mayra-cabrera
mayra-cabrera / decorator_pattern_1.rb
Last active December 15, 2015 22:52
class Post < ActiveRecord::Model
def recent?
published_at > 2.days.ago
end
end
class PostsController < ApplicationController
def show
@post = Post.find(params[:id])
end
@mayra-cabrera
mayra-cabrera / strategy_pattern_3.rb
Last active December 16, 2015 01:22
class Report
def initialize
@strategy = {}
@strategy[Number] = NumberStrategy.new
@strategy[String] = StringStrategy.new
@strategy[SomethingElse] = SomethingElseStrategy.new
end
def generate
@data = extract_data
@mayra-cabrera
mayra-cabrera / strategy_pattern_2.rb
Last active August 29, 2015 14:28
class Report
...
def generate
@data = extract_data
case
when @data.are_numbers?
make_a_numeric_operation
when @data.are_strings?
check_grammar
when @data.is_something_else?
@mayra-cabrera
mayra-cabrera / strategy_pattern_1.rb
Last active August 29, 2015 14:28
class Report
...
def generate
@data = extract_data
case
when @data.are_numbers?
make_a_numeric_operation
when @data.are_strings?
check_grammar
when @data.is_something_else?
@mayra-cabrera
mayra-cabrera / null_pattern_9.rb
Last active December 15, 2015 22:40
class GuaranteedProduct
def self.find(id)
Product.find(id) || MissingProduct.new
end
end
product_ids = [123,456,'',789]
products = product_ids.map{|id| GuaranteedProduct.find(id)}
=> [#<Product:0x000123123 @name="TV"..>,
#<Product:0x000123124 @name="Cellphone"..>,
@mayra-cabrera
mayra-cabrera / null_pattern_8.rb
Last active December 15, 2015 22:30
product_ids = [123,456,'',789]
products = product_ids.map{|id| Product.find(id) || MissingProduct.new }
=> [#<Product:0x000123123 @name="TV"..>,
#<Product:0x000123124 @name="Cellphone"..>,
#<MissingProduct:>,
#<Product:0x000123125 @name="iPad"..>
]
products.each do |product|
puts product.name
@mayra-cabrera
mayra-cabrera / null_pattern_7.rb
Created August 22, 2015 23:56
class Product
def name
...
end
end
class MissingProduct
def name
"no product"
end
@mayra-cabrera
mayra-cabrera / null_pattern_6.rb
Last active August 29, 2015 14:27
product_ids = [123,456,'',789]
products = product_ids.map{|id| Product.find(id)}
=> [#<Product:0x000123123 @name="TV"..>,
#<Product:0x000123124 @name="Cellphone"..>,
nil,
#<Product:0x000123125 @name="iPad"..>
]
puts product.nil? ? '' : product.name
@mayra-cabrera
mayra-cabrera / null_pattern_5.rb
Created August 22, 2015 23:49
product_ids = [123,456,'',789]
products = product_ids.map{|id| Product.find(id)}
=> [#<Product:0x000123123 @name="TV"..>,
#<Product:0x000123124 @name="Cellphone"..>,
nil,
#<Product:0x000123125 @name="iPad"..>
]
products.each do |product|
puts product.try(:name)