ahmadhasankhan

Ruby and Rails Interview Questions

Ruby

• What is a class?
• What is an object?
• What is a module? Can you tell me the difference between classes and modules?
• Can you tell me the three levels of method access control for classes and modules? What do they imply about the method?
• There are three ways to invoke a method in ruby. Can you give me at least two?
• Explain this ruby idiom: a ||= b

ahmadhasankhan

Remove imagemagick

sudo apt-get --purge remove imagemagick
sudo apt autoremove

Install Required package:

sudo apt-get install build-essential 
sudo apt-get install checkinstall

ahmadhasankhan

Please visit https://asistencia.in/blogs/1-mysql-5-5-installation-guide

Thank you

ahmadhasankhan

# Oracle/OCI 8i, 9, 10g
#
# Requires Ruby/OCI8:
#  http://rubyforge.org/projects/ruby-oci8/
#
# Specify your database using any valid connection syntax, such as a
# tnsnames.ora service name, or an SQL connect string of the form:
#
#   //host:[port][/service name]
#

ahmadhasankhan

#1===========First code================

#!/usr/bin/env ruby

databases = {
    :local_db => {
      :database => 'my_db',
      :username => 'root',
      :password => 'admin',
      :host => 'localhost'

ahmadhasankhan

Install and Setup Nginx+Puma+PostgresSQL on Ubuntu-18

Create Deploy User:

  From the root user 
  $ adduser deploy
  $ adduser deploy sudo
  $ exit

ahmadhasankhan

describe 'Expectation Matchers' do
  
  describe 'equivalence matchers' do

    it 'will match loose equality with #eq' do
      a = "2 cats"
      b = "2 cats"
      expect(a).to eq(b)
      expect(a).to be == b      # synonym for #eq

ahmadhasankhan

The Rails Style Guide

This Rails style guide recommends best practices so that real-world Rails programmers can write code that can be maintained by other real-world Rails programmers. A style guide that reflects real-world usage gets used, and a style guide that holds to an ideal that has been rejected by the people it is supposed to help risks not getting used at all – no matter how good it is.

The guide is separated into several sections of related rules. I've tried to add

ahmadhasankhan

sudo apt-get --purge remove wkhtmltopdf
sudo apt autoremove
sudo apt update

Install Wkhtmltopdf 0.12.5–1

• Download Wkhtmltopdf package for Debian 9 from repository,

ahmadhasankhan

require 'formula'

class Imagemagick < Formula
  homepage 'http://www.imagemagick.org'

  url 'http://www.imagemagick.org/download/releases/ImageMagick-6.7.7-10.tar.xz'
  sha256 '85b0f9afe122c52a821001976a4f54ae011bb3d94a87b97e3112e515185731ad'

  head 'https://www.imagemagick.org/subversion/ImageMagick/trunk',
    :using => UnsafeSubversionDownloadStrategy