virajkulkarni14

Given an integer number N

  Your task is to
  
    write a function that prints to the standard output (stdout) the numbers from 1 to N (one per line) with the following restrictions:
      for multiples of three print “Fizz” instead of the number
      for the multiples of five print “Buzz” instead of the number
      for numbers which are multiples of both three and five print “FizzBuzz”
  
  Note that your function will receive the following arguments:

virajkulkarni14

Ubuntu 12.04 Ruby on Rails Development Environment

I haven't set up an install guide for the latest ubuntu release, largely because the last set of instructions worked pretty closely with the latest and greatest Ubuntu, 12.04 Precise Pangolin, however when installing today, I found that there were enough differences in the way that I configure my setup to justify an update, so here it goes. Yes, I'm late to the party, but a quick google search didn't find anything that I felt was as complete for my requirements as my previous install guides, so here I go.

As always with my install guides, I have included here is just about everything you'll need (and then some) to get started with ruby on rails development with Ubuntu 12.04 as a platform. These are my settings and preferences, and this is certainly not the only way of doing things, so keep that in mind.

Step 1: Get the repos ready and run updates.

sudo apt-get update && sudo apt-get upgrade

virajkulkarni14

# setup vagrant
gem install vagrant
vagrant box add lucid32 http://files.vagrantup.com/lucid32.box
mkdir my_vagrant_test
cd my_vagrant_test
vagrant init lucid32
vim Vagrantfile
vagrant up
vagrant ssh

virajkulkarni14

These are some notes on infrastructure & deployment.

• Rails Stack
• Deployment
• VPN
• Monit
• Munin
• Mongodb
• Redis
• God

virajkulkarni14

st=0; ActiveRecord::Base.send(:subclasses).each {|sc| st += sc.all.size}; puts "Total number of rows is #{st.to_s}"

virajkulkarni14

This problem was found only for specific configuration of Toshiba Satellite Series running Linux 12.04 and upwards

Run <sudo lshw -C network -numeric> to find if Ethernet wired interface is AR8162 Fast Ethernet [1969:1090] and wireless network controller is RTL8723AE PCIe Wireless Network Adapter [10EC:8723].

========================================================================================================================================

If wireless network controller is not working, follow these steps:
	
	sudo apt-get update
	sudo apt-get install build-essential linux-headers-generic linux-headers-`uname -r`

virajkulkarni14

# based on Railscast 237, http://railscasts.com/episodes/237-dynamic-attr-accessible
private 
  # take care of attr_accessible based on user role
  def mass_assignment_authorizer
    if accessible == :all
      # original hack, doesn't work with AR attribute type
      # self.class.protected_attributes
      
      # This hack should work as well with AR attribute type
      ActiveModel::MassAssignmentSecurity::BlackList.new {:id}

virajkulkarni14

class PostsController < ActionController::Base
  def create
    Post.create(post_params)
  end
  
  def update
    Post.find(params[:id]).update_attributes!(post_params)
  end

  private

virajkulkarni14

Concept

(The blockquote style does not look so well so I just pasted directly, but these are all quoted from the links in the bottom of this page)

You should not implement to_str unless your object acts like a string, rather than just having a string representation. The only core class that implements to_str is String itself.

[to_i and to_s] are not particularly strict: if an object has some kind of decent representation as a string, for example, it will probably have a to_s method… [to_int and to_str] are strict conversion functions: you implement them only if you object can naturally be used every place a string or an integer could be used.

to_str is used by methods such as String#concat to convert their arguments to a string. Unlike to_s, which is supported by almost all classes, to_str is normally implemented only by those classes that act like strings. Of the built-in classes, only Exception and String implement to_str

virajkulkarni14

#!/bin/bash

sudo service mongodb stop
sudo rm /var/lib/mongodb/mongod.lock
sudo chown -R mongodb:mongodb /var/lib/mongodb/
sudo service mongodb start