elsapet

n = 100
primes = (1..n).map{ |i| i if (2..i-1).map{ |j| j if i%j == 0}.compact.count == 0}.compact
puts primes.inspect # => [1, 2, 3, 5, 7, ..., 97]

elsapet

n = 100000
primes = (0..n).select{ |i| i if (2..i-1).select{ |j| j if i%j == 0}.count == 0}
puts primes.inspect # => [1, 2, 3, 5, 7, ..., 9973]

elsapet

class PaginatingDecorator < Draper::CollectionDecorator
  delegate :current_page, :total_pages, :limit_value
end

elsapet

class AnimalsController < ApplicationController
  inherit_resources
  
  ..
  
  protected
  
  def build_resource_params
    animal_params = params.fetch(:animal, {}).permit(:name, :age, :family)
    [prepare_animal_params(animal_params)]

elsapet

require 'yaml'

def excluded_dir?(filename)
  filename == "." || filename == ".."
end

%w(javascript ruby).each do |lang|
  puts "Renaming #{lang} snapshots..."

  Dir.foreach(lang+"/") do |subfolder|