linqueta

# spec/dummy/app/models/color.rb

class Color < ActiveRecord::Base
  def hex
    MyGem.rgb_to_hex(red, green, blue)
  end
end

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# spec/spec_helper.rb

# ...
require File.expand_path('../spec/dummy/config/environment.rb', __dir__)
ENV['RAILS_ROOT'] ||= File.dirname(__FILE__) + '../../../spec/dummy'

require 'rspec/rails'
# ...

linqueta

# my-gem.gemspec

# ...
Gem::Specification.new do |spec|
  # ...
  
  spec.add_development_dependency 'rspec-rails'
end

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# spec/dummy/config/application.rb

# ...
require 'my-gem'

module Dummy
  class Application < Rails::Application
# ...

linqueta

array = [[0, 1], [2, 3]]
array.each { puts "_1: #{_1}, _2: #{_2}" }
# _1: 0, _2: 1
# _1: 2, _2: 3
# => [[0, 1], [2, 3]]

array.map { |even, odd| [even, odd].sum { _1 } }
# => [1, 5]

array.map { [_1, _2].sum { _1 } }

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SaleLineItem.all
            .map { [mult_it!(_1), add_it!(_1)] }
            .map { _1 + _2 }

linqueta

SaleLineItem.all
            .map { |s| [mult_it!(s), add_it!(s)] }
            .map { |m, a| m + a }

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SaleLineItem.all
            .map { |sli| [mult_it!(sli), add_it!(sli)] }
            .map { |msli, asli| msli + asli }

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SaleLineItem.all
            .map { |sale_line_item| [mult_it!(sale_line_item), add_it!(sale_line_item)] }
            .map { |multiplied_sale_line_item, added_sale_line_item| multiplied_sale_line_item + added_sale_line_item }

linqueta

require 'eezee'
require 'initializer'
require 'character'

RickMorty::Character.find!(1).body
# "INFO -- request: GET https://rickandmortyapi.com/api/character/1"
# "INFO -- request: HEADERS: {\"X-Application-Name\":\"MyTestApp\"}"
# "INFO -- request: PAYLOAD: {}"
# "INFO -- response: SUCCESS: true"
# "INFO -- response: TIMEOUT: false"