theHamdiz

# a gem created by github user ecleel.
require 'hijri'

t = Time.new(1993, 8, 23, 21, 0, 0, "+02:00")
d = DateTime.new(t.year, t.month, t.day, t.hour, t.min, t.sec, Rational(t.gmt_offset / 3600, 24))
h = d.to_hijri

puts "You were born on #{h.strftime('%c')}"

# الاثنين الموافق 5 من ربيع الأول لعام 1414 هجريه

theHamdiz

require_relative 'random_password'
include RandomPassword

class Array
  def insertion_sort
    start_time = Time.now
    arr = self
    for i in (1...(arr.size))
      if arr[i-1] > arr[i]
        i.downto(1) do |el|

theHamdiz

Product.joins(:categories).where(category: { id: [1,2,3,4,5] }).where('products.name like ?', "%ant%")

 Product Load (0.5ms)  SELECT "products".* FROM "products" INNER JOIN "product_categories" ON "product_categories"."product_id" = "products"."id" INNER JOIN "categories" ON "categories"."id" = "product_categories"."category_id" WHERE "category"."id" IN (1, 2, 3, 4, 5) AND (products.name like '%ant%')
ActiveRecord::StatementInvalid: SQLite3::SQLException: no such column: category.id: SELECT "products".* FROM "products" INNER JOIN "product_categories" ON "product_categories"."product_id" = "products"."id" INNER JOIN "categories" ON "categories"."id" = "product_categories"."category_id" WHERE "category"."id" IN (1, 2, 3, 4, 5) AND (products.name like '%ant%')

theHamdiz

module Taggable
  extend ActiveSupport::Concern

  included do
    has_many :taggings, as: :taggable, dependent: :destroy
    has_many :tags, through: :taggings 
  end

  def tag_names
    tags.map(&:name)

theHamdiz

require 'date'
lazy_dates = (Date.today..Date.new(9999)).lazy
fridays_the_13th = lazy_dates.select { |d| d.friday? and d.day == 13 }.first(10)
puts fridays_the_13th

theHamdiz

# Select only the attributes you want from a hash.
# this is crazy useful when getting web parameters for example.
# ---------------------------------------------------------------------
require 'active_support/core_ext'
bacon = { delicious: true, color: "red" }
bacon.slice(:color)
# => { color:"red" }
# it returns a new hash, you can slice unknown keys and it still works.
# there's a lot of great stuff in active_support (from the rails gem)
# it mostly stands by itself but it's big so you can require just 'active_support/core_ext'

theHamdiz

class Person
  def name(n)
    @name = n
    self
  end
  def age(a)
    @age = a
    self
  end

theHamdiz

# Ruby Dose Facebook Page

require 'test/unit'


class Test::Unit::TestCase
  def self.must(name, &block)
    # convert "any method description" to any_method_description
    test_name = "test_#{name.gsub(/\s+/, '_')}".to_sym

theHamdiz

class Info
    class << self
      def method_missing(name, *args, &block)
        case name
        when /^get_(.*)/
          send($1, *args, &block)
        else
          super
        end
      end

theHamdiz

require 'logger'
# Generally its a good practice to avoid global variables, but a good use of them would be in a logger constant
# you can try other Logger creation options such as
# Keep data for the current month only
# Logger.new('this_month.log', 'monthly')
# Keep data for today and the past 20 days.
# Logger.new('application.log', 20, 'daily')
# Start the log over whenever the log exceeds 100 megabytes in size.
# Logger.new('application.log', 0, 100 * 1024 * 1024)
$LOG = Logger.new('app.log', 'monthly')