dapi

The issue

Write a program in Ruby that takes one command line argument (referred to going forward as n). If n is not a perfect square print an appropriate error message and exit. If n is a perfect square then create a sequence from 1 to n and build a matrix from the sequence by walking in counter-clockwise spiral order. Examples below illustrate this for n=1,4,9,16 but your solution should work for any n that is a perfect square. Once you have built the matrix print it, ensuring even column widths as in examples below and then exit.

  Input:  1

dapi

# -*- coding: utf-8 -*-
#
namespace :db do
  desc 'Update all model`s counters'
    task :reset_counters => :environment do
      Dir.glob(Rails.root + '/app/models/*.rb').each { |file| require file }
      models = Rails::VERSION::MAJOR >= 3 ? ActiveRecord::Base.connection.tables.map {|t| t.classify.constantize rescue nil}.compact : Object.subclasses_of(ActiveRecord::Base)

      models.each do |model|

dapi

# Расширение контроллера
#
module Bitrix::Authorization
  def current_user
   @current_user ||= find_from_cookie
 end

 def login_user(user)
    logout_user if current_user
    @current_user = user

dapi

# -*- coding: utf-8 -*-
# Just use 'mysql2_downcase' adapter in database.yml
#

require 'active_record/connection_adapters/mysql2_adapter'

module ActiveRecord
  class Base
    # Establishes a connection to the database that's used by all Active Record objects.
    def self.mysql2_downcase_connection(config)

dapi

class AddTypusAttributesToUsers < ActiveRecord::Migration
  def self.up
    add_column :users, :role, :string
    add_column :users, :status, :boolean, :null=>false, :default=>true
    User.find(1).update_attribute(:role,'admin')
  end

  def self.down
    remove_column :users, :role
    remove_column :users, :status